01603 numbers in Norwich
01603 is the area code for Norwich. Ofcom’s numbering data lists 469 number ranges starting 01603, allocated to 91 providers. The largest holder is BT, with 26% of them.
Who were 01603 ranges given to?
Providers Ofcom allocated these number ranges to.
- BT123 ranges
- Not allocated to a provider101 ranges
- Vodafone Ltd (C&W)36 ranges
- Gamma Telecom Holdings Limited30 ranges
- Sky UK Limited23 ranges
- Virgin Media Limited15 ranges
- TalkTalk Communications Limited14 ranges
- Colt Technology Services10 ranges
- GCI Network Solutions Limited7 ranges
- Magrathea Telecommunications Limited7 ranges
- Voxbone SA4 ranges
- TGL Services (UK) Ltd4 ranges
+ 80 more
Range status
How Ofcom lists the ranges starting 01603.
Allocations by year
Explore by the next digit
Each block below starts 01603. Pick one to narrow it down.
What a 01603 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.
01603 numbers: common questions
Who owns 01603 numbers?
Ofcom allocated the ranges starting 01603 to BT, Vodafone Ltd (C&W), Gamma Telecom Holdings 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 01603 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 01603 number?
Charged as a normal UK call and usually included in landline and mobile allowances.
Is a call from a 01603 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 01603 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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