Kuwait is country code +965. There are no city codes or area codes. All numbers (except +965 18 numbers) have 8 digits after the country code.
Landline numbers begin with +965 2.
Mobile numbers begin with +965 5 (Viva), +965 6 (Wataniya Telecom), or +965 9 (Zain).
(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.)
If you mean Farwaniya, Kuwait, the country code for Kuwait is +965.
The prefix for international calls from Kuwait to other countries is 00. For example, telephone country code +966 for Saudi Arabia would be dialed 00 966.
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
Country code +965 is Kuwait.
Country code +57 is Colombia.
Country code 52 is Mexico.
Fiji has telephone country code +679.
Gibraltar is country code +350.
Moldova is country code +373.
Slovenia is country code +386.