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01603 area-code lookup

01603 Area Code — Norwich, UK

01603 is the UK dialling code for Norwich, allocated by Ofcom under the National Telephone Numbering Plan. Our database has tracked 42 distinct 01603 numbers across 50 public lookups.

Quick facts

Area code

01603

Location

Norwich

Number type

Geographic landline

Number format

01603 XXX XXX

Operators serving

8+

Call cost

Standard rate

Top searched 01603 numbers

These are the 01603 numbers most-looked-up by visitors to our number checker. Click any number to see its full lookup page with risk-level, range holder, and community reports.

NumberSearchesLast looked up
01603 3407863 19 May 2026
01603 3095413 19 May 2026
01603 5104733 13 May 2026
01603 6792362 13 May 2026
01603 9868952 13 May 2026
01603 5161121 22 May 2026
01603 5671631 21 May 2026
01603 4619691 21 May 2026
01603 5164891 21 May 2026
01603 5594081 21 May 2026
01603 2239171 21 May 2026
01603 2266011 21 May 2026
01603 7217561 20 May 2026
01603 3630701 20 May 2026
01603 9154941 20 May 2026
01603 8521741 20 May 2026
01603 7344221 19 May 2026
01603 4226521 19 May 2026
01603 2570101 19 May 2026
01603 7284651 19 May 2026

Operators serving Norwich

These UK communications providers have been allocated 01603 number blocks by Ofcom. The number of blocks per operator gives a rough sense of how widely each provider serves this area.

Provider (Ofcom-allocated)Allocated blocks
BT123
Vodafone Ltd (C&W)36
Gamma Telecom Holdings Limited29
Sky UK Limited23
Virgin Media Limited15
TalkTalk Communications Limited14
Colt Technology Services10
GCI Network Solutions Limited7

Looking up a specific 01603 number?

If you have the full 10- or 11-digit number, use our free UK Phone Number Checker to see the Ofcom range holder, risk level, and any community reports for that specific number.

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