Jersey is a British crown dependency, although it is not part of the United Kingdom. However, it is included in the UK's telephone country code +44.
Landlines in Jersey use UK area code 01534, which is +44 1534 in international format.
Mobiles in Jersey use 07509, 07700, 07797, and 07829. In international format, replace the trunk prefix 0 with country code +44.
(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.)
The country code and area code of Las Palmas, Canary Islands is 34, 828.
The country code and area code of Santa Cruz de Tenerife, Canary Islands is 34, 822.
The Aland Islands are part of Finland, which is telephone country code +358.
The Marshall Islands use country code +692.
The Falkland Islands (also known as the Islas Malvinas) are country code +500.
(see related question)
The Solomon Islands use country code +677. There are no city codes or area codes. The local number is 5 or 7 digits.
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.
Leichtenstein is telephone country code +423.
The telephone country code for the US (including territories in the Caribbean and Pacific), plus Canada and a bunch of Caribbean/nearby islands, is +1.
where is telephone country code 1816
That is not a country code.