Why am I not receiving verification codes on my virtual number?

If you are using a virtual VoIP app number, it is likely being rejected by the platform. Services check the carrier database (HLR lookup) to determine if a number is linked to a physical SIM card (Mobile Network Code). If it is virtual, SMS verification is automatically blocked to prevent fraud.

Can I avoid VoIP blocklist rejections?

You cannot circumvent the detection itself because services query the carrier database directly. The only valid solution is to use a number issued by a legitimate physical mobile network operator (MNO) with a genuine Mobile Network Code, such as SecondSim.

Is SecondSim a VoIP number?

No. SecondSim is operated by Serious People Ltd, an authorized UK Telecoms Operator. All numbers are assigned from physical UK mobile allocation blocks (07xxx) routed over Vodafone UK's cellular infrastructure with a valid Mobile Network Code.

VoIP Verification Checker: Is My Number Blocked?

Co-operative Bank

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We are unable to verify this mobile number. Please use a UK mobile network.

Get a Real UK Number →

Nationwide

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Sorry, we couldn't verify your number. Call us to proceed.

Get a Real UK Number →

Virgin Money

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Invalid mobile number. Please try again.

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Bank of Scotland

Banking

Issues

Often Flagged

Exact Error Message:

We can't send you a code right now.

Get a Real UK Number →

Royal Bank of Scotland

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Activation code not received.

Get a Real UK Number →

Coutts

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please contact your private banker to update your security details.

Get a Real UK Number →

Triodos Bank

Banking

Issues

Often Flagged

Exact Error Message:

SMS delivery failed.

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Kroo

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Your number must be from a supported mobile network.

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Algbra

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Verification failed. Please use a standard mobile number.

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Curve

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We couldn't send a code to that number.

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Pockit

Banking

Issues

Often Flagged

Exact Error Message:

Mobile number not accepted.

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Suits Me

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please enter a valid UK mobile number.

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Mettle

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We only support standard mobile numbers for security.

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Tide

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We could not verify your device. Please try a different number.

Get a Real UK Number →

ANNA Money

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Number validation failed.

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Cashplus

Banking

Issues

Often Flagged

Exact Error Message:

Please provide a valid mobile number.

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Countingup

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Authentication SMS could not be delivered.

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Plum

Finance

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please enter a valid mobile number.

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Chip

Finance

Issues

Often Flagged

Exact Error Message:

We couldn't verify your number.

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Moneybox

Finance

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Verification code failed to send.

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Zing

Finance

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Number not supported.

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Klarna

Credit Services

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We couldn't verify your details. Please try another number.

Get a Real UK Number →

Clearpay

Credit Services

Issues

Often Flagged

Exact Error Message:

Invalid phone number format.

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Laybuy

Credit Services

Issues

Often Flagged

Exact Error Message:

SMS verification failed.

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Zilch

Credit Services

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please use a valid mobile number.

Get a Real UK Number →

Experian

Credit Services

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We could not verify your identity with this number.

Get a Real UK Number →

Equifax

Credit Services

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Number verification error.

Get a Real UK Number →

TransUnion

Credit Services

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Security code could not be sent.

Get a Real UK Number →

ClearScore

Credit Services

Issues

Often Flagged

Exact Error Message:

We could not link this number to your file.

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Credit Karma

Credit Services

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Phone number is VOIP or invalid.

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Just Eat

Gig Worker / Delivery

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Phone number not accepted for courier registration.

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Stuart Delivery

Gig Worker / Delivery

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please provide a valid standard mobile number.

Get a Real UK Number →

Amazon Flex

Gig Worker / Delivery

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Error: Phone number is virtual.

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Bolt

Gig Worker / Delivery

Issues

Often Flagged

Exact Error Message:

We could not send a confirmation code.

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FreeNow

Gig Worker / Delivery

Issues

Often Flagged

Exact Error Message:

Number not valid for driver registration.

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Gopuff

Gig Worker / Delivery

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please enter a valid mobile number.

Get a Real UK Number →

Getir

Gig Worker / Delivery

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Invalid phone number.

Get a Real UK Number →

Ryde

Gig Worker / Delivery

Issues

Often Flagged

Exact Error Message:

SMS delivery error.

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TaskRabbit

Gig Worker / Delivery

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Virtual numbers are not permitted.

Get a Real UK Number →

DVLA

Government / Services

Issues

Often Flagged

Exact Error Message:

We are unable to send an SMS to this number.

Get a Real UK Number →

Universal Credit

Government / Services

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please provide a UK mobile network number.

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Companies House

Government / Services

Issues

Often Flagged

Exact Error Message:

Authentication failed.

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Royal Mail

Government / Services

Issues

Often Flagged

Exact Error Message:

Invalid mobile number format.

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OkCupid

Dating apps

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please enter a valid mobile number.

Get a Real UK Number →

Zoosk

Dating apps

Issues

Often Flagged

Exact Error Message:

Could not send verification code.

Get a Real UK Number →

Plenty of Fish

Dating apps

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Virtual numbers are not supported.

Get a Real UK Number →

Match.com

Dating apps

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

SMS verification failed.

Get a Real UK Number →

Badoo

Dating apps

Issues

Often Flagged

Exact Error Message:

We couldn't verify your number.

Get a Real UK Number →

eHarmony

Dating apps

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please provide a standard mobile number.

Get a Real UK Number →

Grindr

Dating apps

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Unsupported phone carrier.

Get a Real UK Number →

Monzo

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Sorry, there was a problem. Please contact us.

Get a Real UK Number →

Starling Bank

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

This number is not supported.

Get a Real UK Number →

Revolut

Banking

Issues

Often Flagged

Exact Error Message:

We could not verify your number. Please try another.

Get a Real UK Number →

HSBC UK

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Code not received / System Error 085

Get a Real UK Number →

Barclays

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Error 00002 / Mobile number does not match records.

Get a Real UK Number →

Lloyds Bank

Banking

Issues

Often Flagged

Exact Error Message:

We cannot send a code to this number.

Get a Real UK Number →

Santander UK

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

One Time Passcode (OTP) service is not available.

Get a Real UK Number →

NatWest

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Activation code not received.

Get a Real UK Number →

Chase UK

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Something went wrong. Please try again later.

Get a Real UK Number →

First Direct

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We can't verify this device.

Get a Real UK Number →

TSB

Banking

Issues

Often Flagged

Exact Error Message:

We are unable to send an OTP to this number.

Get a Real UK Number →

Metro Bank

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please visit a branch to update your details.

Get a Real UK Number →

Halifax

Banking

Issues

Often Flagged

Exact Error Message:

We can't send you a code right now.

Get a Real UK Number →

Wise (TransferWise)

Banking

Issues

Often Flagged

Exact Error Message:

We're having trouble sending your code.

Get a Real UK Number →

Monese

Banking

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We couldn't verify your phone number.

Get a Real UK Number →

PayPal

Payment

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We're sorry, we can't use this number.

Get a Real UK Number →

Venmo

Payment

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Invalid phone number.

Get a Real UK Number →

Cash App

Payment

Issues

Often Flagged

Exact Error Message:

We could not sign you in.

Get a Real UK Number →

Coinbase

Crypto

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

VoIP numbers are not supported for 2FA.

Get a Real UK Number →

Binance

Crypto

Issues

Often Flagged

Exact Error Message:

Verification code limit exceeded.

Get a Real UK Number →

Crypto.com

Crypto

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Invalid phone number format.

Get a Real UK Number →

Kraken

Crypto

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Invalid phone number.

Get a Real UK Number →

Gov.uk (HMRC)

Gov

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Access Code not received.

Get a Real UK Number →

NHS App

Gov

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We could not match your details.

Get a Real UK Number →

GOV.UK One Login

Gov

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We cannot send a code to this number.

Get a Real UK Number →

Claude (Anthropic)

AI

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Error sending code. Please try a different number.

Get a Real UK Number →

OpenAI (ChatGPT)

AI

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Suspicious activity detected from this number.

Get a Real UK Number →

Bet365

Gambling

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please contact us to verify your location.

Get a Real UK Number →

William Hill

Gambling

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Mobile number not recognised.

Get a Real UK Number →

Amazon Seller

Retail

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Internal Error / OTP not received.

Get a Real UK Number →

Etsy

Retail

Issues

Often Flagged

Exact Error Message:

Your shop is in Holiday Mode.

Get a Real UK Number →

eBay

Retail

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please provide a valid mobile number.

Get a Real UK Number →

Ticketmaster

Retail

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

VoIP or Landline numbers are not accepted.

Get a Real UK Number →

Nike SNKRS

Retail

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please enter a valid mobile number.

Get a Real UK Number →

Adidas Confirmed

Retail

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Something went wrong.

Get a Real UK Number →

Gumtree

Retail

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please enter a valid mobile number.

Get a Real UK Number →

Vinted

Retail

Issues

Often Flagged

Exact Error Message:

Invalid phone number.

Get a Real UK Number →

Depop

Retail

Issues

Often Flagged

Exact Error Message:

Something went wrong.

Get a Real UK Number →

Tesco Clubcard

Retail

Issues

Often Flagged

Exact Error Message:

Code not received.

Get a Real UK Number →

WhatsApp Business

Social

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Is not a valid mobile number for this country.

Get a Real UK Number →

Telegram

Social

Issues

Often Flagged

Exact Error Message:

Phone number banned.

Get a Real UK Number →

Signal

Social

Issues

Often Flagged

Exact Error Message:

Network error.

Get a Real UK Number →

TikTok

Social

Issues

Often Flagged

Exact Error Message:

This number is already registered.

Get a Real UK Number →

Twitter / X

Social

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Unsupported phone number.

Get a Real UK Number →

Instagram

Social

Issues

Often Flagged

Exact Error Message:

We restricted certain activity.

Get a Real UK Number →

WeChat

Social

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Registration failed due to suspicious environment.

Get a Real UK Number →

Nextdoor

Social

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We can't verify this phone number.

Get a Real UK Number →

Tinder

Dating

Issues

Often Flagged

Exact Error Message:

Problem getting your code.

Get a Real UK Number →

Bumble

Dating

Issues

Often Flagged

Exact Error Message:

Invalid verification.

Get a Real UK Number →

Hinge

Dating

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

You've been banned.

Get a Real UK Number →

Battle.net (Blizzard)

Gaming

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Please enter a post-paid phone number.

Get a Real UK Number →

Steam

Gaming

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

VoIP numbers are not supported.

Get a Real UK Number →

Faceit

Gaming

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Verification Failed. Phone type not supported.

Get a Real UK Number →

Roblox

Gaming

Issues

Often Flagged

Exact Error Message:

Verification failed.

Get a Real UK Number →

Discord

Gaming

Issues

Often Flagged

Exact Error Message:

Invalid phone number.

Get a Real UK Number →

Uber (Driver)

Gig

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

This type of phone number is not supported.

Get a Real UK Number →

Deliveroo

Gig

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

Verify your identity to go online.

Get a Real UK Number →

Airbnb

Travel

Issues

Often Flagged

Exact Error Message:

We couldn't verify your phone number.

Get a Real UK Number →

AWS (Amazon Cloud)

Cloud

Issues

Often Flagged

Exact Error Message:

We could not verify your phone number.

Get a Real UK Number →

Google Cloud

Cloud

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

This phone number cannot be used for verification.

Get a Real UK Number →

Microsoft Azure

Cloud

Blocked

Requires Real SIM This service checks for a Mobile Network Code (MNC). VoIP numbers lack this code. SecondSim provides a real MNC.

Exact Error Message:

We cannot verify your identity.

Get a Real UK Number →

Is Your Number Blocked?Search Database.

Why Services Reject VoIP Phone Numbers

Co-operative Bank

Nationwide

Virgin Money

Bank of Scotland

Royal Bank of Scotland

Coutts

Triodos Bank

Kroo

Algbra

Curve

Pockit

Suits Me

Mettle

Tide

ANNA Money

Cashplus

Countingup

Plum

Chip

Moneybox

Zing

Klarna

Clearpay

Laybuy

Zilch

Experian

Equifax

TransUnion

ClearScore

Credit Karma

Just Eat

Stuart Delivery

Amazon Flex

Bolt

FreeNow

Gopuff

Getir

Ryde

TaskRabbit

DVLA

Universal Credit

Companies House

Royal Mail

OkCupid

Zoosk

Plenty of Fish

Match.com

Badoo

eHarmony

Grindr

Monzo

Starling Bank

Revolut

HSBC UK

Barclays

Lloyds Bank

Santander UK

NatWest

Chase UK

First Direct

TSB

Metro Bank

Halifax

Wise (TransferWise)

Monese

PayPal

Venmo

Cash App

Coinbase

Binance

Crypto.com

Kraken

Gov.uk (HMRC)

NHS App

GOV.UK One Login

Claude (Anthropic)

OpenAI (ChatGPT)

Bet365

Is Your Number Blocked?
Search Database.