Number range
01638 66xxxx
Ofcom’s records for the block of 10,000 numbers that start 0163866, and any numbers in it that we hold other information about.
What Ofcom’s records say
- Allocated to
- BT
- The provider Ofcom gave the block to
- Ofcom status
- Allocated
- Allocated on
- 15 July 1994
- 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 BT.
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.
- 01638 661449
- Pharmacy: Pharmacy2go
- 01638 662018
- GP practice: Oakfield Surgery
- 01638 662152
- Pharmacy: Boots
- 01638 662318
- School: Fairstead House
- 01638 662719
- School: St Louis Catholic Academy
- 01638 662835
- School: All Saints Church of England Primary School, Newmarket
- 01638 663214
- School: Houldsworth Valley Primary Academy
- 01638 663927
- School: Laureate Community Academy
- 01638 664127
- School: Paddocks Primary School
- 01638 664412
- School: Newmarket Academy
- 01638 665711
- GP practice: The Rookery Medical Centre
- 01638 666719
- Pharmacy: Superdrug Pharmacy
- 01638 666887
- GP practice: Orchard House Surgery
Contains public sector information from NHS England (Organisation Data Service), "Pharmacies (edispensary)" (13 October 2026), licensed under the Open Government Licence v3.0.
Contains public sector information from NHS England (Organisation Data Service), "GP Practices (epraccur)" (13 October 2026), licensed under the Open Government Licence v3.0.
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.