Where In the UK is the area code 0161 284?

UK area code 0161 (or +44 161 in international format) is Manchester.

A number beginning with 0161 284 is most likely a Virgin Media landline, but could be located anywhere in the Manchester area. Furthermore, with number portability, any Manchester number could be located anywhere in the 0161 area, served by any local telephone company.

(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.)