Keep your phone number when you switch in the UK

The short answer

You can keep your mobile number: text PAC to 65075 and your provider must send the code within one minute. Give it to your new provider before it expires after 30 days; the switch must be completed within one working day.

You can usually take your mobile or landline number with you to a new provider. You ask the new provider to transfer it, and the number moves on an agreed day.

Official source: ofcom.org.uk · Checked 2026-10-14

📜 The rules in the UK

Compensation

If the switch is delayed, or you're without service for longer than allowed, your provider may have to compensate you.

The details

Don't want to keep your number? Text STAC to 75075 instead. If your account has more than one number, call your provider or use its website. (ofcom.org.uk)
You can keep your landline number when you switch. Even if you've already cancelled, you can still ask to keep it free of charge within one month of cancelling. (ofcom.org.uk)
Providers may not charge you directly for moving your number, and must allow it for at least one month after you end your contract, unless you agree otherwise. (ofcom.org.uk)
Text INFO to 85075 to check whether you're still in contract and might have to pay an early termination charge. (ofcom.org.uk)

Ofcom

The UK communications regulator. It sets and enforces the rules for phone and broadband providers. It can't investigate or resolve individual complaints, but reporting faults and problems to it helps it act on wider issues.

📞 0300 123 3333 🔗 ofcom.org.uk

Official source: ofcom.org.uk · Checked 2026-10-14

🪜 Step by step

Do not cancel the old contract firstIf you end the old contract before the transfer, the number can be lost. Let the new provider request the transfer.
Get your details readyYou usually need the number, the name on the old contract and sometimes a customer number or transfer code from the old provider.
Agree the transfer dateThe new provider tells you when the number moves. Keep the old SIM or line in use until then.
Check that everything worksTest calls and messages on the new SIM or line, and check that the old provider sends a final bill and stops charging.

📇 Who to contact

OfcomThe UK communications regulator. It sets and enforces the rules for phone and broadband providers. It can't investigate or resolve individual complaints, but reporting faults and problems to it helps it act on wider issues.📞 0300 123 3333 🔗 www.ofcom.org.uk

Communications Ombudsman or CISAS (the scheme your provider belongs to)Settles disputes between customers and providersWhen the provider has not solved your complaint🔗 www.ofcom.org.uk/phones-and-broadband/service-quality/adr-schemes

❓ Questions

How long does a number transfer take?

It is usually quick. If the rules in the UK set a maximum time or compensation for delays, you find them on this page.

Can I keep my number if I still owe the old provider money?

You still have to pay what you owe under the old contract. Ask the new provider before you switch whether anything could hold up the transfer.

Can I move a mobile number to a landline, or the other way round?

Usually not: mobile numbers move between mobile providers, landline numbers between landline providers.

📎 Sources

Checked: 2026-10-14

🧭 Is this still correct?

We check this information carefully, but phone numbers, websites and rules change — and sometimes we get something wrong. Spotted a mistake or a change? Let us know below.

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📲 Can I keep my phone number when I switch provider in the UK?