London set to outgrow area code - again! - Boxx Communications Ltd
Area Code Maps | Commission for Communications Regulation
International Calling Codes: How to Dial to and from Europe & the US by Rick Steves
History - Telephones UK
UK Numbering
What Do 0203 Phone Numbers Mean? | Londonist
0204 Numbers – New London Area Code - Tamar Telecom
Dialling Code Booklets, your memories? - UK Vintage Radio Repair and Restoration Discussion Forum
Why UK area codes are numbered as they are : r/CasualUK
0207 Numbers: A Complete Guide - Deadline News
Sri Lanka Dialing Code - Sri Lankan Country Code - Telephone Area Codes in Sri Lanka - YouTube
List of dialling codes in the United Kingdom - Wikipedia
Which telephone country code starts with +171, as in +171470---50? - Quora
London to get 10million new landline numbers with launch of new dialling code | London Evening Standard | Evening Standard
Do inner and outer London have different telephone prefixes (071 vs 081)? If so, is there any prestige in having an inner prefix? - Quora
London set to outgrow area code - again! - Boxx Communications Ltd
History - Telephones UK
A brief history of Local Numbers in the UK
Fictional phone numbers in For All Mankind – alexwlchan
History Of London's Phone Codes
London calling: Ofcom to release new '(020) 4' phone numbers | Ofcom | Official Press Release
32 Country Code - Belgium Phone Dialling Code - How To Call Belgium From UK
07 numbers overview - Area-codes.org.uk
History - Telephones UK
A Little History of London Phone Numbers - VIP VoIP
What Do 0203 Phone Numbers Mean? | Londonist
A Little History of London Phone Numbers - VIP VoIP
