Dialling code
01205
Area
Boston
Number type
Geographic landline (01/02)
Local format
01205 XXXXXX
From abroad
+44 1205 XXXXXX
Ofcom number blocks
406
Blocks in service
138
Range holders
99

Where is the 01205 area code?

The 01205 dialling code is the UK geographic area code for Boston. Because 01205 is a geographic (01/02) code, a number using it is tied to the Boston dialling-code area — though with modern hosted telephony (VoIP) a business can keep a 01205 number after moving premises, so the code reflects the number’s designated area rather than a guaranteed physical location today.

Ofcom currently lists 406 number blocks under 01205, of which 138 are allocated to 99 communications providers.

Boston phone number format

A Boston 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 01205 XXXXXX (the Xs stand for the local digits). Ofcom has not reserved a fictitious drama range for 01205; for on-screen examples it recommends the unused 01632 96000001632 960999 range.

Who holds 01205 number ranges?

Ofcom allocates 01205 numbers to providers in blocks. These providers hold the largest allocations under 01205:

Range holder (allocated by Ofcom)Number blocksExample range
BT1901205 26XXXX
Sky UK Limited601205 384XXX
TalkTalk Communications Limited601205 327XXX
GCI Network Solutions Limited401205 22XXXX
Digital Space Group Limited301205 393XXX
Gamma Telecom Holdings Limited301205 33XXXX
Colt Technology Services201205 616XXX
Fuse 2 Communications Ltd201205 385XXX

…and 91 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.

01205 number ranges

Browse the allocated 01205 ranges by their first local digit — each guide lists the providers holding that slice of Boston’s numbers:

Call charges for 01205 numbers

Calls to 01205 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 01205 scam calls

Fraudsters frequently spoof local dialling codes, faking the caller ID so a scam call appears to come from a Boston (01205) number you might trust. Remember:

  • A familiar 01205 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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