Number range
0303 003 xxxx
Ofcom’s records for the block of 10,000 numbers that start 0303003, and any numbers in it that we hold other information about.
What Ofcom’s records say
- Allocated to
- Gamma Telecom Holdings Limited
- The provider Ofcom gave the block to
- Ofcom status
- Allocated
- Allocated on
- 12 April 2007
- Area
- Not linked to a place
- Numbers in block
- 10,000 numbers
- Number length
- 11 digits
Source: Ofcom numbering data, files published 7 October 2026, checked 13 October 2026
Ofcom has allocated this block of numbers to Gamma Telecom Holdings Limited.
Ofcom allocates phone numbers to communications providers in blocks. The provider shown is the one Ofcom allocated this block to. It is not the person or business that called you, and the number may since have moved to a different network, because people can usually keep their number when they switch provider. Ofcom does not hold information about individual numbers.
Numbers in this range we know about
Numbers an organisation lists on its own website or in an official register, and numbers at least 3 visitors have reported.
- 0303 003 0000
- 0303 003 1234
- College: Capel Manor College
- 0303 003 1743
- Government organisation: The Insolvency Service
- 0303 003 1744
- Government organisation: The Insolvency Service
- Contact listed on GOV.UK: Compliance and Targeting
- 0303 003 9400
- College: East Sussex College Group
Contains public sector information from Department for Education, "Establishment fields CSV" (13 October 2026), licensed under the Open Government Licence v3.0.
Sources and checks
This page relies on:
Checked on 13 October 2026. Read how reports work. How we check our information. Spotted a mistake? Tell us and we will put it right.