That address in Los Angeles, California, is in area code 310, with overlay area code 424.
90049
The area code 0121 is in Birmingham.
Gotham City is a fictional place, and thus has no actual area code.
UK area code 01708 (a.k.a. +44 1708) is Romford.
01409 area code Holsworthy
Taunton
Ruhinda is not a place name in present-day Uganda, so it does not have a telephone area code.
Some business phone numbers have a different area code but some use the same as their home phone area code. They also may use the area code of the place where the business will be most familiar.
01306 is the area code for Dorking in Surrey.
The area code of 01702 is for the seaside resort of Southend-on-Sea.
01420 is for Alton, in Hampshire.
Ask your neighbour