What area code in Glasgow is 0141 239?

UK telephone area code 0141 (or +44 141 in international format) is Glasgow and surrounding areas. 0141 369 is a "virtual" prefix, meaning that any specific number in that range could be located anywhere in the greater Glasgow 0141 area. Beyond that, with number portability, any specific 0141 number could be located anywhere in the 0141 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.)