Number range

020 7270 xxxx

Ofcom’s records for the block of 10,000 numbers that start 0207270, and any numbers in it that we hold other information about.

What Ofcom’s records say

Allocated to: Lumen Technologies UK Limited; The provider Ofcom gave the block to
Ofcom status: Allocated
Allocated on: 18 January 2008
Area: London; Area code 020
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 Lumen Technologies UK 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.

020 7270 0534
- Government organisation: Wales Office
020 7270 5000
- Government organisation: Government Debt Management Function
- Government organisation: Government Finance Function
- Government organisation: HM Treasury
- Government organisation: National Infrastructure and Service Transformation Authority
- Government organisation: Office of Financial Sanctions Implementation
- Government organisation: UK Government Investments
020 7270 5238
- Government organisation: HM Treasury
- Government organisation: Office of Financial Sanctions Implementation
- Government organisation: UK Government Investments
020 7270 5454
- Government organisation: Office of Financial Sanctions Implementation

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.