011 is the international dial code from the USA and Canada
44 is the country code for the United Kingdom (which includes England, Wales, Scotland and Northern Ireland)
As the next two digits are '75', this is a mobile (cell) phone. The phone could be registered anywhere in the United Kingdom, as UK mobile phones are not allocated to local, geographic area codes.
A UK number starting with +44 750 (or 0750 in domestic format) is a mobile phone.
(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.)
011 is the prefix for dialing international calls from North America (USA, Canada, etc.).
+44 is the telephone country code for the United Kingdom.
780 is the beginning of a mobile phone (cellphone) number in the UK.
All UK area codes begin with a 0. There is no area code 6010 in the UK, and there is no 06010 code either.
UK area code 020 is London.
There is no area code 20 in the UK
There is no 01134 code in the UK.
The country code and area code of Aberdeen, United Kingdom is 44, (0)1224.
The country code and area code of Jiangmen- GD, China is 86, (0)750.
Cambridge is in area code 01223, or +44 1223 from outside the UK.
In the UK, 0121 is the area code for Birmingham.
Until the early 1990's, area code +44 21 (or 021 within the UK) was Birmingham, which is now area code +44 121 (or 0121 within the UK). There has never been an area code +44 217 (or 0217) in the UK.
The area code "029" is assigned to the city Cardiff in Wales, UK.
Slough. There is no 0753 code in the UK.
There is no UK area code like 0491. If the number is pre-1995 then this area code is now 01491 which covers Henley-on-Thames.