History - Telephones UK
List of dialling codes in the United Kingdom - Wikipedia
Ringflow: Unlocking the Mystery UK Phone Number Format Demystified | by Ringflow | Medium
London to get new telephone 0204 area code to cope with demand | Metro News
Is it possible to get an area code from UK mobile number? - Quora
What Do 0203 Phone Numbers Mean? | Londonist
List of dialling codes in the Republic of Ireland - Wikipedia
List of dialling codes in Germany - Wikiwand
History - Telephones UK
A Little History of London Phone Numbers - VIP VoIP
07 numbers overview - Area-codes.org.uk
0207 Numbers: A Complete Guide - Deadline News
International Calling Codes: How to Dial to and from Europe & the US by Rick Steves
London gets 10 million more phone numbers with '0204' launch | TechRadar
Remember the London Code Changes on 6 May
UK Numbering
32 Country Code - Belgium Phone Dialling Code - How To Call Belgium From UK
Area Code Maps | Commission for Communications Regulation
A Little History of London Phone Numbers - VIP VoIP
A brief history of Local Numbers in the UK
0204 Numbers – New London Area Code - Tamar Telecom
London calling: Ofcom to release new '(020) 4' phone numbers | Ofcom | Official Press Release
London set to outgrow area code - again! - Boxx Communications Ltd
History Of London's Phone Codes
Dialling Code Booklets, your memories? - UK Vintage Radio Repair and Restoration Discussion Forum
