Geographic numbers

Area codes starting 0133

Ofcom’s numbering data lists 3,106 number ranges starting 0133, allocated to 120 providers. The largest holder is BT, with 7% of them.

Number type
Geographic numbers
01 / 02
Area
Various
14 area codes
Ofcom ranges
3,106
1,102 allocated
First allocated
1994
120 providers

Who were 0133 ranges given to?

Providers Ofcom allocated these number ranges to.

  • Not allocated to a provider2,004 ranges
  • BT224 ranges
  • Vodafone Ltd (C&W)55 ranges
  • GCI Network Solutions Limited52 ranges
  • Gamma Telecom Holdings Limited42 ranges
  • Sky UK Limited35 ranges
  • TalkTalk Communications Limited32 ranges
  • Inet Telecoms Ltd (Voipfone)18 ranges
  • Colt Technology Services16 ranges
  • Fuse 2 Communications Ltd14 ranges
  • Magrathea Telecommunications Limited14 ranges
  • Digital Space Group Limited14 ranges

+ 109 more

Range status

How Ofcom lists the ranges starting 0133.

Protected · 1,938 Allocated · 1,102 Free · 59 Quarantined · 7

Allocations by year

19942026

What do these statuses mean?

Explore by the next digit

Each block below starts 0133. Pick one to narrow it down.

What a 0133 number tells you

What it is

Ordinary landline numbers tied to a place. The area code tells you which dialling area the number was issued for – 0161 is Manchester, 020 is London, 01388 is Bishop Auckland.

What it costs

Charged as a normal UK call and usually included in landline and mobile allowances.

Watch out for

A local-looking number feels familiar, which is exactly why scammers spoof them. A local area code is not proof the caller is local.

The range holder isn’t necessarily the caller. Ofcom gives numbers to providers in blocks, and people and businesses can take their number with them when they switch. To find out who actually called, check the full number.
Questions

0133 numbers: common questions

Who owns 0133 numbers?

Ofcom allocated the ranges starting 0133 to BT, Vodafone Ltd (C&W), GCI Network Solutions Limited and others. Numbers can be moved between providers, so this shows who the range was originally given to – not who is using a particular number today.

How do I call a 0133 number from abroad?

Replace the leading 0 with +44. For example, a number starting 0133 becomes +44 133 followed by the rest of the number.

How much does it cost to call a 0133 number?

Charged as a normal UK call and usually included in landline and mobile allowances.

Is a call from a 0133 number a scam?

A local-looking number feels familiar, which is exactly why scammers spoof them. A local area code is not proof the caller is local. Check the full number on Who’s Calling to see if it belongs to a verified business and what other people have reported.

Did a 0133 number call you?

Check the full number to see if it belongs to a verified UK business and what other people have reported.

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