Kyrgyzstan is country code +996.
You must drop the trunk prefix '0' from the beginning of the Kyrgyz domestic number when calling from other countries. For example, Bishkek's area code 0312 becomes +996 312.
Landline numbers begin with +996 3 or +996 6. Mobile and satellite numbers begin with +996 5 or +996 7.
(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, and many other countries use different prefixes.)
There isn't a state with a prefix of 996. It is however, the country code for Kyrgyzstan. Kyrgyzstan was the only country or state that came up in the results.
Leichtenstein is telephone country code +423.
where is telephone country code 1816
That is not a country code.
Bishkek is in Kyrgyzstan, whose 2-letter country code is .KG
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.
Vanuatu is country code +678.