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Phoenix, Arizona Zip Codes 85001 85002 85003 85004 85005 85006 85007 85008 85009 85010 85011 85012 85013 85014 85015 85017 85018 85019 85020 85021 85022 85023 85024 85025 85026 85027 85028 85029 85030 85031 85033 85034 85035 85036 85037 85038 85039 85040 85041 85042 85043 85044 85045 85046 85048 85051 85053 85054 85055 85060 85061 85062 85063 85064 85065 85066 85067 85068 85069 85070 85072 85073 85074 85075 85076 85077 85078 85079 85080 85082 85085 85086 85087 85098 85099 Prior to the use of zip codes, cities were divided into regions and mail was addressed as Phoenix 10, Arizona, for example, to show which region of the city the mail was intended for. As cities continued to grow this system was not sufficient and was replaced by the Zip Code. ZipCodes went into effect in 1963. The United States Postal Service (USPS) initially used a cartoon character Mr. Zip to promote the use of zip codes. In 1983 the zipcode added the last four digits in an attempt to more narrowly define an address. The first three digits of a zip code indicate the sectional center facility which will ultimately sort and distribute that piece of mail. All mail to that 5 digit zipcode will first arrive at the sectional center facility then after sorting continue along to its exact destination. Since the first digit of Phoenix's zip code is 8 it is located in the "8" zone that includes the following areas: Arizona, Colorado, Idaho, New Mexico, Nevada, Utah, and Wyoming.