Dialling code
01529
Area
Sleaford
Number type
Geographic landline (01/02)
Local format
01529 XXXXXX
From abroad
+44 1529 XXXXXX
Ofcom number blocks
424
Blocks in service
113
Range holders
88

Where is the 01529 area code?

The 01529 dialling code is the UK geographic area code for Sleaford. Because 01529 is a geographic (01/02) code, a number using it is tied to the Sleaford dialling-code area — though with modern hosted telephony (VoIP) a business can keep a 01529 number after moving premises, so the code reflects the number’s designated area rather than a guaranteed physical location today.

Ofcom currently lists 424 number blocks under 01529, of which 113 are allocated to 88 communications providers.

Sleaford phone number format

A Sleaford number is made up of a 5-digit area code followed by a 5 or 6-digit local number. Written in full it looks like 01529 XXXXXX (the Xs stand for the local digits). Ofcom has not reserved a fictitious drama range for 01529; for on-screen examples it recommends the unused 01632 96000001632 960999 range.

Who holds 01529 number ranges?

Ofcom allocates 01529 numbers to providers in blocks. These providers hold the largest allocations under 01529:

Range holder (allocated by Ofcom)Number blocksExample range
BT1101529 22XXXX
Vodafone Ltd (C&W)901529 250XXX
Sky UK Limited301529 660XXX
TalkTalk Communications Limited301529 269XXX
Digital Space Group Limited201529 32XXXX
Fuse 2 Communications Ltd201529 685XXX
GCI Network Solutions Limited201529 28XXXX
(AQ) LIMITED101529 53XXXX

…and 80 more providers hold smaller allocations in this range.

Ofcom’s data shows the provider each number range was originally allocated to — not who holds an individual number today. Numbers are frequently moved (ported) between providers, and no public database reveals the person or business behind a specific number, so treat any service that claims to with suspicion.

01529 number ranges

Browse the allocated 01529 ranges by their first local digit — each guide lists the providers holding that slice of Sleaford’s numbers:

Call charges for 01529 numbers

Calls to 01529 geographic numbers are charged at your phone provider’s standard UK landline rate and are normally included in inclusive call minutes. UK-wide 03 numbers are guaranteed by Ofcom to cost the same as 01/02 calls, while 084, 087 and 09 numbers cost considerably more — always check the prefix before you dial.

Spotting spoofed 01529 scam calls

Fraudsters frequently spoof local dialling codes, faking the caller ID so a scam call appears to come from a Sleaford (01529) number you might trust. Remember:

  • A familiar 01529 area code is not proof the caller is local or genuine — caller ID can be faked.
  • Banks, HMRC and the police will never ask you to move money or share passwords or one-time codes over the phone.
  • If a call feels off, hang up, wait a moment, and call the organisation back on a number from their official website or your statement.
  • Report nuisance calls to the ICO and forward scam texts to 7726 (free).

Other dialling codes in this range

Numerically adjacent UK dialling codes:

Browse all UK area-code guides ›

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