Where in North America is area code 528?

Answer 1

There is no area code 528 in North America (USA, Canada, etc.).

Telephone country code +52 is Mexico, and area codes beginning with +52 8 are in the northeastern part of the country. For example, +52 81 is Monterrey. Note that you must insert the prefix '1' between the country code +52 and the area code when calling a mobile phone.

(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.)