Alaska AK is located in the northwestern part of the United States. The climate here is cold, and the temperature is mostly below freezing throughout the year. Alaska is a sparsely populated state with a land area of 1,717,854 square kilometers and a population of only 720,000. Alaska was originally a Russian territory and was later sold to the United States, becoming the 49th state of the United States in 1959. The capital of Alaska is Juneau, with a population of just 31,000. The main local transportation is by water and air, there is no land transportation. The most well-known and largest city in Alaska is Anchorage, with a population of nearly 300,000. The state's main economies are fishing, mining, forestry and travel. The area code for Alaska AK is 907, the zip code for Juneau is 99801, the zip code for Anchorage is 99501, and the zip code for Fairbanks is 99701 .