Where is telephone country code 990?

Answer 1

Country code +999 (dialed as 00 999 from many places) is unassigned. It is reserved for some unspecified future global telecommunications service(s).

(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.)

Answer 2

Country code +990 is unused/invalid.

(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.)

Answer 3

Telephone country codes never begin with zero.

Country code +599, dialed as 00 599 from many places, is used by the Dutch Caribbean islands of Curaçao, Bonaire, Sint Eustatius, and Saba. (Sint Maarten used to also use +599, but now uses +1 721.)

Country code +99, dialed as 005 99 from many places, is an incomplete code somewhere in Asia. You need one more digit to specify the country.

To avoid confusion, it is best to write an international telephone number in correct international format, beginning with the plus symbol and the correct telephone country code (e.g., +599 or +995), omitting any dialing prefix.

(The plus signmeans "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.)