There is no 443 area code in the UK.
However, +44 is the country code for the UK.
A number such as +44 300 123 4567 would be valid UK number written in the standard international format, equivalent to 0300 123 4567 within the UK.
UK numbers beginning with 03 (or +44 3 from overseas) are not linked to any geographic area. They are used for businesses, government agencies and other organisations who want a non-geographic number that's not linked to any specific part of the country. Within the UK, they must by law be charged at the exact same rate as a regular geographic (01... or 02...) number.
The country code and area code of Garabekevul, Turkmenistan is 993, (8)443.
The country code and area code of El Hawata, Sudan is 249, (0)443.
The country code and area code of Morelia- Mich., Mexico is 52, (01)443.
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.
Country code +1 is North America (USA, Canada, etc.). Area code 443 is in Maryland, and the 454 prefix is in Annapolis, MD, USA.
The country code and area code of Aberdeen, United Kingdom is 44, (0)1224.
Linthicum, Maryland, is in area code 410 and overlay codes 443 and 667. The same three area codes also serve Baltimore and Annapolis.
Cambridge is in area code 01223, or +44 1223 from outside the UK.
In the UK, 0121 is the area code for Birmingham.