What area of Glasgow Scotland has telephone numbers beginning with 0141 548?

The UK telephone area code for Glasgow is 0141, or +44 141 in international format. A number beginning with 0141 258 could be located anywhere in the greater Glasgow 0141 area.

(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.)