What do you mean by city code in the Philippines?

Answer 1

In the context of telephone numbers, the city code is the area code, omitting the trunk prefix 0. For example, Metro Manila uses area code 02, so its city code is 2, or +63 2 including the country code.

(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.)