List of dialling codes in Germany - Wikiwand
London calling: Ofcom to release new '(020) 4' phone numbers | Ofcom | Official Press Release
Dialling Code Booklets, your memories? - UK Vintage Radio Repair and Restoration Discussion Forum
07 numbers overview - Area-codes.org.uk
Is it possible to get an area code from UK mobile number? - Quora
Fictional phone numbers in For All Mankind – alexwlchan
Why UK area codes are numbered as they are : r/CasualUK
List of dialling codes in the Republic of Ireland - Wikipedia
A Little History of London Phone Numbers - VIP VoIP
What Do 0203 Phone Numbers Mean? | Londonist
London to get new telephone 0204 area code to cope with demand | Metro News
A brief history of Local Numbers in the UK
London gets 10 million more phone numbers with '0204' launch | TechRadar
Area codes for Switzerland | UMS Ltd Temporary Housing Switzerland | Temporary furnished apartments Zurich, Basel, Bern, Geneva, Lausanne, St.Gall, Lucerne, Zug
Sri Lanka Dialing Code - Sri Lankan Country Code - Telephone Area Codes in Sri Lanka - YouTube
List of dialling codes in the United Kingdom - Wikipedia
History - Telephones UK
London set to outgrow area code - again! - Boxx Communications Ltd
0207 Numbers: A Complete Guide - Deadline News
How letters were used for digits in United Kingdom telephone exchange names and dialling codes up to the 1960's
0204 Numbers – New London Area Code - Tamar Telecom
London to get 10million new landline numbers with launch of new dialling code | London Evening Standard | Evening Standard
