773 is not a London dialling code, but maybe you mean:
A London landline number with '020' area code:
020 7730 xxxx - Sloane
020 7731 xxxx - Parsons Green
020 7732 xxxx - New Cross
020 7733 xxxx - Brixton
020 7734 xxxx - Gerrard Street (Soho)
020 7735 xxxx - Vauxhall
020 7736 xxxx - Parsons Green
020 7737 xxxx - Brixton
020 7738 xxxx - Battersea / Brixton / Nine Elms
020 7739 xxxx - Shoreditch
A mobile phone:
0773x xxxxxx
This is probably a North American number, as 00 is a common international access code, and 1 is the country code for North America. Area code 773 is Chicago, Illinois, USA.
The dialing code 00601 is not associated with London or the UK. In fact, it is likely a non-standard or fictional code, as UK dialing codes typically begin with 0 followed by a 2-5 digit area code. For London, the area codes start with 020. If you're looking for specific dialing codes in London, the standard code is 020.
The postal code of Hayes, London is UB3, UB4. The dialing code of the town is 020. The town is located n west London.
This is a code for an area of London but has been written incorrectly. It should read 020 3634
Area code 020 is London. There is no more specific geographic information possible from the information in your question.
London Borough of Sutton, post codes SM, KT, CR
The telephone code +44 20 is used for London, United Kingdom. The "+44" is the country code for the UK, and the "20" is the area code specifically for Greater London. This code is used for both landlines and mobile phones when dialing to or from the London area.
The dialing code for Barbados is 246
The country code +4420 is used for telephone numbers in London, United Kingdom. The "44" is the country code for the UK, while "20" specifically designates the London area. When dialing from abroad, you would precede a London number with +4420.
The Australian country code when dialing from the USA is 61.
As is, it would appear that '947' is an international dialing code. That would be the international dialing code for Qatar.
The area code for Hayes, Middlesex, England, is 020. This code is part of the London numbering plan, as Hayes is located in the Greater London area. The full dialing format for local calls typically includes the area code followed by the local number.