What does PAC code mean?
PAC code meaning: PAC stands for Porting Authorisation Code. It is a unique nine-character code (three letters followed by six numbers, e.g. ABC123456) that allows you to transfer your existing mobile phone number from one network provider to another. If you are switching from Vodafone to EE, or from O2 to Three, you need a PAC code to keep your current number. Without one, you would be assigned a brand-new number when you join your new provider.
PAC codes are sometimes searched for as “pac codes”, “pack code”, “pak code”, or even “stac code” — they all refer to the same thing: the code you need to port your mobile number. The process is called mobile number portability (MNP) and is a legal right for all UK mobile customers under Ofcom regulations.
How do I get a PAC code?
Getting a PAC code is straightforward. Under Ofcom regulations, all UK mobile providers must issue a PAC code when requested. Here are the main ways to get one:
Text for your PAC code (fastest method)
The quickest method is to text PAC to 65075 from the mobile number you want to keep. Your network must respond with your PAC code within one minute. This works on all major UK networks including Vodafone, EE, O2, and Three.
Some networks require your date of birth for security — if prompted, text PACDDMMYY to 65075 (replacing DDMMYY with your date of birth).
Call your network provider
You can call your current provider’s customer services line and request a PAC code verbally. Be prepared for retention offers — your provider may try to convince you to stay, but they cannot refuse to issue the code.
Request online or via app
Most networks allow you to request a PAC code through their website or app. Log into your account and look for the “switching” or “leaving” section.
Through your account manager (business mobiles)
For business mobile contracts managed by Connection Technologies, simply contact your dedicated account manager and we will handle the entire PAC code process for you — including bulk transfers for multiple lines.
How to get a PAC code from every UK network
Here is how to request a PAC code from each major UK mobile network:
| Network | Text Method | Phone Number | Online |
|---|---|---|---|
| EE | Text PAC to 65075 | 150 (from EE) or 07953 966250 | EE leaving guide |
| Vodafone | Text PAC to 65075 | 191 (from Vodafone) or 0333 304 0191 | Vodafone leaving guide |
| O2 | Text PAC to 65075 | 202 (from O2) or 0344 809 0202 | O2 number transfer |
| Three | Text PAC to 65075 | 333 (from Three) or 0333 338 1001 | Three switching guide |
| Sky Mobile | Text PAC to 65075 | 0333 759 1018 | Sky keep your number |
| Tesco Mobile | Text PAC to 65075 | 4455 (from Tesco) or 0345 301 4455 | Tesco leaving guide |
| giffgaff | Text PAC to 65075 | Online support only | giffgaff PAC help |
| VOXI | Text PAC to 65075 | Webchat only | VOXI help |
| iD Mobile | Text PAC to 65075 | 7777 (from iD) or 0333 003 7777 | iD switching hub |
| Lebara | Text PAC to 65075 | 5588 (from Lebara) or 0207 031 0791 | Lebara keep your number |
| SMARTY | Text PAC to 65075 | Webchat only | SMARTY PAC request |
How long is a PAC code valid for?
A PAC code is valid for 30 days from the date it is issued. If you do not use it within this period, you will need to request a new one. The 30-day validity gives you time to compare deals and choose the right provider without pressure. There is no limit to how many times you can request a PAC code.
How long does it take to transfer my number?
Once you give your PAC code to your new network provider, the number transfer typically completes within one working day. The key cut-off is 5pm Monday to Friday — if your new provider receives the PAC before 5pm, the port should complete the next working day. Submissions after 5pm or at weekends roll to the following working days.
During the brief switchover period (usually a few hours), you may experience a short interruption in service. After that, your old SIM will stop working and your number will be active on your new network.
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PAC code vs STAC code vs INFO code: what is the difference?
The Ofcom Text-to-Switch system introduced in July 2019 uses three different codes. Understanding the difference is essential before you switch:
| Code | What to Text | Number to Text | Purpose | Keep Your Number? | Format |
|---|---|---|---|---|---|
| PAC code | PAC | 65075 | Switch networks and keep your number | Yes | 3 letters + 6 numbers (e.g. ABC123456) |
| STAC code | STAC | 75075 | Cancel your contract and release your number | No — number is permanently lost | 6 numbers + 3 letters (e.g. 123456ABC) |
| INFO code | INFO | 85075 | Check your contract end date and any exit fees | N/A — no switch initiated | Text response only |
Most people want a PAC code because keeping their existing number avoids the hassle of updating contacts, bank accounts, two-factor authentication, and business listings. If you want a completely fresh start with a new number, you need a STAC code instead.
Top tip: Always text INFO to 85075 first. This tells you your contract end date and any early termination fees — with no commitment. Armed with that information, you can decide whether to use a PAC or STAC.
What is a STAC code? (Service Termination Authorisation Code)
STAC stands for Service Termination Authorisation Code. It is a nine-character code used to cancel your mobile contract and terminate your phone number when switching to a new provider. Unlike a PAC code which transfers your number, a STAC code permanently releases it — meaning you will get a brand-new number with your new provider.
A STAC code format is the reverse of a PAC code: six numbers followed by three letters (e.g. 963852XYZ), whereas a PAC code is three letters followed by six numbers (e.g. ABC123456).
How to get a STAC code
Getting a STAC code is just as simple as getting a PAC code:
Text method (fastest): Text STAC to 75075 from the number you want to cancel. Your network must respond within one minute with your STAC code and any applicable early termination charges.
Some networks require additional verification. For example, Three may require you to text STAC followed by your date of birth in DDMMYY format (e.g. STAC150990) to 75075.
Call your provider: Ring your network customer services and request a STAC code. As with PAC codes, they cannot refuse.
Online or via app: Log into your account and look for the switching or leaving section. Most providers now offer STAC requests through their self-service portals.
When should you use a STAC code instead of a PAC code?
Use a STAC code when:
- You want a fresh start — a completely new number with no ties to your old account
- You are receiving unwanted calls or spam — changing your number is the most effective way to stop persistent nuisance calls
- You are closing a secondary line — if you have a spare SIM or secondary business line you no longer need
- You are switching to a new business provider and your company is issuing new numbers to all staff
- You do not want your old provider to know your new number — a STAC terminates the old number entirely rather than porting it
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How long is a STAC code valid for?
A STAC code is valid for 30 days from the date it is issued — the same as a PAC code. If you do not use it within 30 days, your contract remains active and you will need to request a new STAC code.
What happens when I use a STAC code?
Once you give your STAC code to your new provider:
- Your new provider notifies your old network that you are leaving
- Your old contract is cancelled (usually within one working day)
- Your old phone number is permanently terminated — it cannot be recovered
- Your new SIM activates with a brand-new number
Important: Once a STAC code is used and your old number is terminated, there is no way to get that number back. If there is any chance you might want to keep your number, use a PAC code instead.
STAC code vs PAC code: quick comparison
| Feature | PAC Code | STAC Code |
|---|---|---|
| Purpose | Switch and keep your number | Switch and get a new number |
| Text to | 65075 | 75075 |
| Format | 3 letters + 6 numbers | 6 numbers + 3 letters |
| Validity | 30 days | 30 days |
| Number kept? | Yes — transferred to new provider | No — permanently terminated |
| Contract cancelled? | Yes, automatically on port | Yes, automatically on activation |
| Early termination fees? | May apply | May apply |
| Best for | Most people switching networks | People wanting a fresh number |
What is an INFO code and how to use it
Before requesting a PAC or STAC code, it is worth texting INFO to 85075. This free service returns:
- Your contract end date
- Any early termination charges you would face if you leave now
- Outstanding device payments remaining on your plan
The INFO text does not trigger any switching process — it is purely informational. Your provider will not contact you with retention offers, and your contract is completely unaffected. Think of it as a no-obligation fact-check before you commit to switching.
Step-by-step: how to switch networks with a PAC code
- Text PAC to 65075 from the number you want to keep. You will receive your PAC code within 60 seconds along with any early termination charges.
- Choose your new plan. Compare deals and sign up with your new provider. Need help? Get a free business mobile quote from Connection Technologies.
- Give your PAC to your new provider. Enter it during sign-up or add it later through your new account. Your new provider handles the rest.
- Wait for the switch. The port completes the next working day. Keep using your old SIM until it shows “No Service”, then insert your new SIM or activate your eSIM.
Important: Do not cancel your old contract separately. The PAC code process handles cancellation automatically when the port completes.
Can I use a PAC code for a business mobile?
Absolutely. Business mobiles use the same PAC code system as personal phones. If your business is switching providers and you need to port multiple numbers, each line will require its own PAC code.
For bulk transfers (more than 24 numbers), your provider will outline a managed switching process rather than individual PAC texts.
At Connection Technologies, we manage bulk PAC code transfers for businesses of all sizes, ensuring zero disruption to your team. We handle the paperwork, coordinate with networks, and make sure every number ports cleanly.
Tips for a smooth number transfer
- Request your PAC code before signing a new contract — have it ready so you can provide it immediately
- Do not cancel your old contract first — the PAC code process handles cancellation automatically
- Check for early termination fees — text INFO to 85075 first to see any exit charges before committing
- Check your phone is unlocked — older devices may be locked to your current network. Contact your provider to unlock it before switching
- Back up your contacts, data, and voicemails — while your number transfers automatically, your data and voicemail do not
- Time it right — submit your PAC before 5pm Monday to Friday for a next-working-day switch. Avoid Friday afternoons if you need your phone over the weekend
- Allow one working day — plan the switch for a time when a brief service interruption will not cause problems
Your rights when switching mobile networks
Ofcom regulations protect you throughout the switching process:
- Free to request: Your network cannot charge you for issuing a PAC code
- Cannot be refused: Your provider must issue a PAC code when requested — they may make retention offers but cannot withhold the code
- No double-charging: Providers cannot charge notice-period days after your switch date
- Post-cancellation porting: You can still request to keep your number within one month of cancelling your old contract
- Compensation: If your switch is delayed beyond expected timeframes, you may be entitled to compensation
- Speed guarantee: PAC codes requested by text must be delivered within one minute; by phone, immediately where possible or by SMS within two hours
Frequently Asked Questions About PAC Codes
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