Area Code 117 – Bristol

Geographic Overview

The 020 area code is the geographic National Destination Code (NDC) for London, the capital of the United Kingdom. It serves the Greater London area, including the City of London, Westminster, and numerous boroughs. The code is administered by Ofcom, the UK communications regulator, and is used for both fixed-line and VoIP services. London is a major global city, and the 020 code is one of the most recognized in the UK numbering plan.

Dialing Formats

For local calls within London, callers can dial the full 11-digit number, including the trunk prefix '0' and the area code, e.g., 020 7946 0958. For international calls from outside the UK, callers should dial the international access code (e.g., 00 from most countries), followed by the UK country code 44, then the area code without the leading '0', and the subscriber number: +44 20 7946 0958.

Numbering Structure

London numbers are 8 digits long after the area code, making the total number length 11 digits when including the leading '0'. The 020 area code is an overlay for the entire London area, meaning that all London numbers share the same code, and there is no need for local dialing differences. This simplifies dialing for residents and businesses.

Historical and Regulatory Notes

Historically, London had separate area codes for inner (0171) and outer (0181) London, but these were merged into 020 in 2000. The change was part of a broader restructuring of UK numbering to accommodate growing demand. Today, 020 numbers are used by businesses and residents across London, and they are not tied to a specific physical location within the city, as number portability allows users to keep their numbers when moving.

Caller Instructions

For callers within the UK, always dial 020 followed by the 8-digit local number. For callers from abroad, replace the leading '0' with +44. For example, a London number 020 1234 5678 becomes +44 20 1234 5678 internationally. This format is essential for international call routing.