Ask what a number is worth and three answers come back, all confident and none the same. Forum threads quote figures from £100 to £65,000. Valuation tools are mostly American and score UK numbers badly. Dealers will happily make an offer, but a dealer is also the buyer, which makes any figure they give a negotiating position rather than a price. The result is that most people holding a genuinely good number have no idea what it is worth, and a few sell far below value because the first offer sounded generous. This guide answers how much is my mobile number worth without anyone needing to make an offer first.
What this guide covers: the four bands a UK number can fall into, the specific patterns that move a number between them, why published figures disagree so wildly, the routes available for selling, and the fraud risk that makes a careless sale genuinely dangerous.
What decides a mobile number valuation
Value comes from one thing only: how little effort it takes a stranger to remember the digits. Everything treated as a valuation factor is really a proxy for that.
A random eleven-digit string is eleven separate things to hold in mind, which is why nobody recalls one. A memorable number collapses into two or three. The families that achieve this are well established, and any mobile number valuation starts by identifying which one applies.
- Repeating digits — the strongest family by a distance. Six or more identical digits in a row sits at the top of the market.
- Sequences — digits ascending or descending in order, unbroken.
- Mirrors and paired blocks — a number pattern the ear registers as rhythm rather than digits.
- Clean endings — a tail of 000, 100 or 007 after an otherwise unremarkable opening.
- Words on the keypad — digits spelling a recognisable term. Valuable to a specific buyer, weak on the open market.
- Culturally weighted sequences — runs of eights, or 786. These behave differently from the rest, and are covered separately in the guide to lucky mobile numbers in the UK.
Two further valuation factors matter as much as the family itself. The first is length: the shorter the memorable portion, the higher the value. The second is interruption. A single stray digit dropped into the middle of an otherwise perfect run can halve a number’s worth, because it breaks the very chunking that made the number easy to hold.
The thirty-second test: read the number aloud once, wait half a minute, then try to write it down from memory. Numbers that survive that test have value. Numbers that do not are ordinary, whatever a listing calls them.
The four bands of UK mobile number value
No central market sets prices, so figures vary between sellers. Even so, the UK market has settled into four recognisable bands, and placing a number in the right one is most of the work.
| Band | Typical range | What sits here |
|---|---|---|
| Ordinary | Little to no resale value | No discernible pattern. The overwhelming majority of numbers. |
| Mildly memorable | Roughly £25–£99 | One tidy feature — a repeated pair, a clean ending. |
| Strong | Roughly £100–£650 | A pattern running through most of the number. Commonly advertised as a gold number at the lower end and a VIP number higher up. |
| Rare | Four to five figures | Long runs of repeating digits, unbroken sequences. Priced individually, negotiated privately. |
At the very top the figures become genuinely striking. Numbers have reportedly changed hands in the UK for £35,000 and £65,000, and there are longstanding accounts of networks themselves offering holders £500 to £2,000 to release a particularly clean number. Those cases are outliers and should be read as the ceiling of the market, not a guide to it.
Why published figures disagree so much
Anyone researching what is my phone number worth quickly runs into contradictions. There are four reasons for it, and understanding them removes most of the confusion.
Asking price is not sale price. A listing showing £3,000 proves only that someone hopes to receive £3,000. Marketplaces display what sellers want, rarely what buyers paid, and the gap between the two can be enormous.
Dealer offers are opening bids. A specialist dealer buying a number intends to resell it at a margin. Their offer is therefore wholesale, and treating it as a valuation understates the number by design.
Most valuation tools are American. They are built around US area codes and vanity spelling conventions, and they do not understand the structure of a UK number or which 07 prefix ranges even exist.
Forum figures are anecdotes. The most visible answers online come from discussion threads where individuals recall what they were once offered. Those recollections are years old, unverified, and skew towards the memorable extremes.
Working out how much is my mobile number worth
A five-step self-assessment
- Confirm it is a mobile at all. Genuine UK mobiles run 071–075 and 077–079, plus 07624. An 070 number is personal numbering and 076 is pagers, and neither carries resale value as a mobile.
- Identify the pattern family. Repeating digits, sequence, mirror, clean ending, or none. If none applies, the number is ordinary and the answer is that it has no meaningful market.
- Measure the interruption. Count the digits that break the pattern. Zero is exceptional, one weakens it substantially, two or more usually ends the premium entirely.
- Find genuine comparables. Search live listings for numbers with the same structure — not the same digits. Note the spread rather than the highest figure.
- Discount the asking price. Comparable listings represent the optimistic end. A realistic private sale typically lands below them, and a dealer offer lower still.
Two numbers that look similar can value very differently, so the structure comparison in step four matters more than it appears. 07777 777 777 and 07777 771 777 share an opening and belong in entirely different bands.
Routes to sell my mobile number
Selling is legal in the UK. Ofcom allocates number ranges to communications providers under conditions, and the provider does not own the number it issues. Because portability rules attach the number to the customer rather than the network, a holder can move a number to a buyer through the ordinary transfer process — and that is precisely what makes a resale market possible at all.
| Route | Typical outcome | Trade-off |
|---|---|---|
| Specialist dealer | Fastest, lowest price | Wholesale offer, but immediate and low effort |
| Marketplace listing | Mid to high, slow | May sit unsold for months; listing fees possible |
| Private buyer | Highest, riskiest | No intermediary, so payment and transfer risk falls on both parties |
Whichever route applies, the transfer itself uses standard number porting. The holder texts PAC to 65075, receives a nine-character code, and passes it to the receiving network — the full PAC code process is worth reading before you start. Ofcom requires the code to be issued free and within two working hours of the request, and it stays valid for thirty days. The transfer completes within one working day, and the old account closes automatically.
Selling safely, and the fraud risk to understand first
A PAC code hands over control of the number. SIM swap fraud works by obtaining exactly this and moving a victim’s number to a device the criminal controls. Whoever holds the number receives the SMS codes that reset banking passwords and defeat two-factor authentication. A PAC should never be shared with anyone unless the holder personally initiated the sale and is certain who is receiving it.
That risk shapes the sensible order of a sale. Payment should clear before the code is released, never after, and never on the promise of payment on receipt. Anything attached to the number — banking, two-factor authentication, account recovery, messaging apps — must be migrated to a different number first, because those links do not transfer with ownership and will keep pointing at whoever now holds the line.
Unsolicited approaches deserve particular suspicion. A message claiming interest in buying a number, arriving out of nowhere and pressing for a code quickly, is far more likely to be an attempt at SIM swap fraud than a genuine offer.
Common questions
Is it legal to sell a mobile number in the UK?
Yes. Portability rules mean a number follows its holder rather than the network, so it can be transferred to a buyer using a PAC code like any other switch. What transfers is the right to use the number, since ranges remain allocated to providers by the regulator.
Can a number be lost by leaving it unused?
Yes, and this catches people out. A pay-as-you-go SIM left inactive long enough can be reclaimed and recycled by the network. A valuable number needs periodic activity to stay held.
Do networks buy numbers back?
Not as a standard service. There are longstanding reports of networks approaching holders of exceptional numbers directly, but no operator runs a published buy-back scheme, and no holder should count on one.
Does the 07 prefix affect what a number is worth?
Barely. Because numbers are portable, a prefix indicates only which operator first issued the number, not which network carries it now. Buyers paying extra for a prefix on network grounds are paying for nothing, as the guide to UK mobile number prefixes explains in detail.
How long does a sale take to complete?
The transfer itself takes one working day once the code is issued. Finding a buyer at a good price is the slow part and can take months for anything outside the rare band.
The realistic answer
For most people the honest answer is that their number is worth nothing on the open market, because anything that is not a memorable number has no buyer at any price. That is not a disappointing result so much as the normal one, and it is worth establishing early rather than after weeks of hopeful listing.
For the small number of holders sitting on a genuine pattern, the figure is real and often larger than expected, but it is set by structure rather than sentiment. A number that survives the thirty-second test, runs uninterrupted, and can be described in a single short phrase belongs in the strong band or above. One that needs a paragraph of explanation does not, however attached its owner may be to it.
The discipline that protects a seller is the same discipline that protects a buyer of any premium mobile number: judge the digits rather than the label, compare against structure rather than hope, take payment before releasing anything, and move every account tied to the line before the number changes hands. Get those four right and the market is straightforward. Skip the last one and a profitable sale can turn into a very expensive mistake.
Sources
- Ofcom — Telecoms numbering, on how ranges are allocated to providers and on consumer portability rights.
- Porting Authorisation Code, on the two working hour issuing requirement and the thirty day validity period.
- Nottinghamshire Police — SIM card scam warning, on how SIM swap scams use number transfers to defeat two-factor authentication.
Last reviewed 25 August 2026. Market prices move and regulations change; this guide is re-checked when they do.