Telephone country code +44 is the United Kingdom, but there are no valid telephone numbers beginning with either +44 4 or +44 51.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
Edmonton
Dial +44 20 xxxx xxxx from a mobile or 00 44 20 xxxx xxxx from a landline
UK
Country code +246 is the British/US military base on the island of Diego Garcia, in the middle of the Indian Ocean.
Birmingham
It usually means that is the amount of number and its spacing. xxx-xxx-xxxx can be replaced by 123-456-7890. (xxx) xxx-xxxx would be a phone number such as (408) 123-4567
Edinburgh, Scotland, UK
Country code +1 is North America (USA, Canada, etc.). Area code 443 is in Maryland, and the 454 prefix is in Annapolis, MD, USA.
If this is a LONDON, UK, number then the correct format for the number is: (020) 8888 xxxx The area served by 8888 is WOOD GREEN. These numbers were previously in the 0181-888-xxxx block, and before that in the 081-888-xxxx, block. Way before that they were originally in the 01-888-xxxx block, pre 1990.
Heathrow uses the London area code, which is 020.A typical London number follows the pattern (020) xxxx xxxx. As an example, the number 020 7222 1234 would be dialled as follows:From another London 020 landline phone:7222 1234From a phone elsewhere in the UK or a mobile phone:020 7222 1234From outside the country:+44 20 7222 1234(where + represents the international access code used by the country being called from, usually 00 or 011)
A London (UK) phone number has 8 digits. If you wish to dial a London (UK) phone number from outside the London area (or a mobile phone) you need to prefix the 8 digits by the 3 digit London area code of 020 (which would normally be displayed in brackets before the number viz: (020) yxxx xxxx - the y is either 3, 7 or 8). If you wish to dial it from outside the UK, you'll need the international prefix for your country, followed by the country code of 44 plus the London area code without the leading zero plus the 8 digits, ie: +44 20 yxxx xxxx
773 is not a London dialling code, but maybe you mean:A London landline number with '020' area code:020 7730 xxxx - Sloane020 7731 xxxx - Parsons Green020 7732 xxxx - New Cross020 7733 xxxx - Brixton020 7734 xxxx - Gerrard Street (Soho)020 7735 xxxx - Vauxhall020 7736 xxxx - Parsons Green020 7737 xxxx - Brixton020 7738 xxxx - Battersea / Brixton / Nine Elms020 7739 xxxx - ShoreditchA mobile phone:0773x xxxxxx