Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — PREFIX/171

ZIP codes starting with 171

ZIP codes
26
States
PA
Largest city
Harrisburg, PA
Population
184,296

The first three digits of a ZIP code identify a sectional center facility — the postal processing plant that sorts mail for the area. It is a mail-routing grouping, not an administrative boundary.

Every ZIP code in 171xx

ZIP codes starting with 171
ZIP City Type Population Median income Median home
17101 Harrisburg , PA Standard 2,722 $50,878 —
17102 Harrisburg , PA Standard 8,118 $54,573 $193,700
17103 Harrisburg , PA Standard 13,115 $39,825 $137,900
17104 Harrisburg , PA Standard 18,541 $46,510 $104,800
17105 Harrisburg , PA No street area — — —
17106 Harrisburg , PA No street area — — —
17107 Harrisburg , PA No street area — — —
17108 Harrisburg , PA No street area — — —
17109 Harrisburg , PA Standard 27,466 $71,833 $215,900
17110 Harrisburg , PA Standard 27,364 $80,699 $222,900
17111 Harrisburg , PA Standard 36,744 $86,385 $235,500
17112 Harrisburg , PA Standard 38,502 $103,876 $313,000
17113 Harrisburg , PA Standard 11,724 $68,244 $161,800
17120 Harrisburg , PA Standard 0 — —
17121 Harrisburg , PA No street area — — —
17122 Harrisburg , PA No street area — — —
17123 Harrisburg , PA No street area — — —
17124 Harrisburg , PA No street area — — —
17125 Harrisburg , PA No street area — — —
17126 Harrisburg , PA No street area — — —
17127 Harrisburg , PA No street area — — —
17128 Harrisburg , PA No street area — — —
17129 Harrisburg , PA No street area — — —
17130 Harrisburg , PA No street area — — —
17140 Harrisburg , PA No street area — — —
17177 Harrisburg , PA No street area — — —

Cite this page

zipcodes.pro. “ZIP codes starting with 171.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/prefix/171

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