Where is area code 21?

Answer 1

There is no telephone area code 21 in North America (USA, Canada, etc.), but there are several area codes in the range 210 through 219.

Other countries may have an area code 21 or similar.

There is no telephone country code +21.

+211 = South Sudan

+212 = Morocco

+213 = Algeria

+216 = Tunisia

+218 = Libya

(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.)