Number Transfer PIN: Protect Your Number From Being Moved

A number transfer PIN, or port-out PIN, is a code your carrier requires before your number can move to another carrier. Setting one helps stop number theft.

Why it matters

If someone moves your number to their SIM, they receive your texts, including verification codes. A transfer PIN means they also need a secret only you know.

Getting one

• Most US carriers let you set or generate a transfer PIN in their app or account website.
• In the UK, switching uses a PAC code you request yourself by text, which gives similar protection.
• Elsewhere, ask your carrier about port-out protection or SIM lock.

Extra protection

• Set an account PIN or password with your carrier.
• Use an authenticator app or passkey instead of text codes for important accounts.
• Watch for sudden loss of signal: it can be a sign your number moved.

Read more about SIM swap fraud.

Keep your carrier account secure

Use a strong password and two-step sign-in on your carrier's app or website. Someone who gets into your carrier account could change the transfer PIN or order a replacement SIM.

FAQ

What is a port-out PIN?

A code your carrier requires before your number can move to another carrier.

Is a transfer PIN the same as my voicemail PIN?

No, it is a separate account protection.

Does a PIN stop SIM swaps?

It stops many number transfers. Ask your carrier about SIM swap protection too.

Related: SIM swap fraud · O2 PAC code · SMS vs app codes.