North Korea (the Democratic People's Republic of Korea, or DPRK) is country code +850.
You must drop the trunk prefix '0' from the beginning of the North Korean number when calling from other countries. For example, Pyongyang's 031 and 033 area codes become +850 31 and +850 33, respectively. Mobiles begin with +850 30.
(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.)
North American area code +1 827 is unassigned. Country code +82 is South Korea, and a number beginning +82 70 is for VoIP.
Per Wikipedia, the ISO country code "KP" is North Korea. Seoul is in South Korea, whose ISO country code is "KR".
Telephone country code +1 is North America (USA, Canada, etc.), but there is no area code 121 in North America. It is an invalid number.
The country code for North America is +1 (USA, Canada, etc.). As for the country code +1265, it does not exist.
Telephone country code +1 is North America (USA, Canada, etc.), but there are no valid numbers beginning with +1 1.
None that I can find. The nearest is 850 - North Korea
Telephone country code +82 is South Korea, and a number beginning with +82 1 is a mobile phone from Korea. However, it is incorrect to refer to "country code +821"; the correct country code is just +82.(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.)
Telephone country code +1 is North America, including the USA, Canada, and 18 islands in or near the Caribbean, but there is no area code +1 467. There are no valid telephone numbers beginning with +1 467.
North America (USA, Canada, etc.) is country code +1 because the telephone was invented there.
No such area code in North America (telephone country code +1 = USA, Canada, etc.).
Leichtenstein is telephone country code +423.
For the Internet, .nz For telephone, +64