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Boston, Massachusetts Zip Codes 02101 02102 02103 02104 02105 02106 02107 02108 02109 02110 02111 02112 02114 02115 02116 02117 02118 02119 02120 02121 02122 02123 02124 02125 02127 02128 02129 02130 02131 02132 02133 02134 02135 02136 02137 02163 02199 02201 02202 02203 02204 02205 02206 02207 02208 02209 02210 02211 02215 02216 02217 02222 02228 02241 02266 02283 02284 02293 02295 02297 Prior to the use of zip codes, cities were divided into regions and mail was addressed as Boston 10, Massachusetts, 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 Boston's zip code is 0 it is located in the "0" zone that includes the following areas: Connecticut, Maine, Massachusetts, New Hampshire, New Jersey, Puerto Rico, Rhode Island, Vermont, and the Virgin Islands .