Geographic numbers

016033 numbers in Norwich

Numbers beginning 016033 are part of the Norwich dialling area, whose area code is 01603. Ofcom’s numbering data lists 73 number ranges starting 016033, allocated to 36 providers. The largest holder is Gamma Telecom Holdings Limited, with 11% of them.

Number type
Geographic numbers
01 / 02
Area
Norwich
Area code 01603
Ofcom ranges
73
55 allocated
First allocated
1994
36 providers

Who were 016033 ranges given to?

Providers Ofcom allocated these number ranges to.

  • Not allocated to a provider18 ranges
  • Gamma Telecom Holdings Limited8 ranges
  • Sky UK Limited6 ranges
  • TalkTalk Communications Limited3 ranges
  • BT3 ranges
  • GCI Network Solutions Limited2 ranges
  • Verizon UK Limited2 ranges
  • Datazero Ltd2 ranges
  • Ziron Limited1 range
  • Inet Telecoms Ltd (Voipfone)1 range
  • Barritel Limited1 range
  • IOVOX Limited1 range

+ 25 more

Range status

How Ofcom lists the ranges starting 016033.

Allocated · 55 Protected · 18

Allocations by year

19942026

What do these statuses mean?

Explore by the next digit

Each block below starts 016033. Pick one to narrow it down.

What a 016033 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

016033 numbers: common questions

Where is the 01603 area code?

01603 is the UK dialling code for Norwich. Calls from a 01603 number were made from a phone line issued for that area – although caller ID can be faked, so a local code is not proof the caller is local.

Who owns 016033 numbers?

Ofcom allocated the ranges starting 016033 to Gamma Telecom Holdings Limited, Sky UK Limited, TalkTalk Communications 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 016033 number from abroad?

Replace the leading 0 with +44. For example, a number starting 01603 becomes +44 1603 followed by the rest of the number.

How much does it cost to call a 016033 number?

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

Is a call from a 016033 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 016033 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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