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07731 Mobile numbers UK

07731 is a UK mobile range. In the latest Ofcom data the 07731 blocks are allocated to Telefonica UK Limited. Calls and texts to 07731 numbers are charged at your standard mobile rate.

All one million 07731 numbers are allocated, the first in 2001. Visitors have checked 45 different 07731 numbers here.

07731 at a glance

Number type
UK mobile, standard rate (not premium, not a landline)
Numbers allocated
1,000,000 of 1,000,000 (100%)
Providers
Big four networks
100% of allocated numbers (O2)
First issued
10 January 2001
Newest range
10 January 2001
Location
None: UK mobile numbers aren't tied to a place

Source: Ofcom numbering data, re-imported weekly.

What it costs to call an 07731 number

Standard mobile rate, usually inside call bundles.

From a mobile
Normally in inclusive minutes; 3p to 65p a minute outside them
From a landline
Often included; otherwise typically 10p to 20p a minute plus a set-up fee (usually 23p)

Source: Ofcom call costs guide (updated 31 January 2025). Ofcom treats these as indicative; your provider sets the final price.

What people check and report about 07731 numbers

From searches in our lookup form since 13 May 2026 and the verdicts and reports visitors left. A check means someone typed the number in, usually after a missed call.

Checks
47
Different numbers checked
45
Different people checking
45

That makes 07731 numbers the 360th most-checked of the 592 mobile blocks people have looked up here.

Caller verdicts on 07731 numbers: 2

2 scam. Too few to show shares yet.

Most-reported and most-checked 07731 numbers

NumberVerdictsReportsPeople checking
07731 9735511 scam—1
07731 9816621 scam—1

If a 07731 number called you

No clear pattern in reports for these numbers yet. If a call worried you:

  1. 1

    Call back on a number you trust

    If a caller says they're your bank, HMRC, a courier or a council, hang up and ring the organisation on the number from its website or your statement, never the number that called you. Caller ID can be faked.

  2. 2

    Forward it to 7726

    On a mobile, copy the caller's number from your recent calls and text it to 7726 (it spells SPAM). Scam texts can be forwarded to 7726 as they are. It's free, and your network uses the reports to investigate and block numbers.

    Ofcom: what to do about a scam call ↗

  3. 3

    Stop sales calls

    Register your landline and mobile free with the Telephone Preference Service (0345 070 0707). Legitimate UK marketers must check it; calls should drop within 28 days. It won't stop scammers.

    Telephone Preference Service ↗

  4. 4

    If you lost money or shared details

    Call your bank on the number on your card (or 159 to reach most UK banks safely), then report it to Report Fraud online or on 0300 123 2040. Report Fraud replaced Action Fraud on 4 December 2025 for England, Wales and Northern Ireland; in Scotland call Police Scotland on 101.

    159 (Stop Scams UK) ↗Report Fraud ↗

Who owns a 07731 number?

07731 is not an area code: it is a slice of the national 07 mobile range that Ofcom hands to providers in blocks. The largest holder of 07731 numbers is O2 (Telefonica UK Limited). A number can be ported to another network while keeping its digits, so the holder is the original provider rather than necessarily today’s. The person behind a number isn’t public: no legitimate free service can name a stranger from their mobile number. See UK mobile networks by prefix for how blocks are shared out.

Ranges starting with 0773110 on Ofcom's register
PrefixStatusRange holderAllocated
+44 77310AllocatedTelefonica UK Limited10 January 2001
+44 77311AllocatedTelefonica UK Limited10 January 2001
+44 77312AllocatedTelefonica UK Limited10 January 2001
+44 77313AllocatedTelefonica UK Limited10 January 2001
+44 77314AllocatedTelefonica UK Limited10 January 2001
+44 77315AllocatedTelefonica UK Limited10 January 2001
+44 77316AllocatedTelefonica UK Limited10 January 2001
+44 77317AllocatedTelefonica UK Limited10 January 2001
+44 77318AllocatedTelefonica UK Limited10 January 2001
+44 77319AllocatedTelefonica UK Limited10 January 2001

Related lookups

FAQs about 07731

Which network are 07731 numbers on?

Ofcom has allocated 1,000,000 of the million 07731 numbers (100%) to 1 provider: O2 (Telefonica UK Limited) (1,000,000). The four big networks hold 100% of the allocated numbers. A number can be ported, so its current network may differ.

When were 07731 numbers first issued?

The oldest allocation still on Ofcom's register for 07731 dates from 10 January 2001.

Can I find out who owns a 07731 number?

Ofcom's register names the provider behind each 07731 range, not the person using a number, and UK mobile numbers aren't in any public directory. Enter the full number above to see its range holder and any verdicts or reports about that exact number.

Are 07731 numbers scams?

Visitors have checked 45 different 07731 numbers here 47 times since May 2026. They left 2 verdicts: 2 scam, 0 nuisance, 0 safe.

What does it cost to call a 07731 number?

It's a standard UK mobile number: calls are normally in inclusive minutes, and Ofcom's call costs guide puts calls outside a bundle at 3p to 65p a minute from a mobile and typically 10p to 20p a minute from a landline.

How do I report a 07731 number?

Copy the number from your recent calls and text it to 7726 (free); forward scam texts to 7726 too. If you lost money, call your bank and report it to Report Fraud on 0300 123 2040 (Police Scotland on 101 in Scotland). Register with the Telephone Preference Service to cut sales calls.