Overview
This data set provides the IANA time zone for each US Postal Service ZIP Code. It covers the entire United States and territories. Updated monthly.
Last updated May 1, 2024. The record count is 40,998.
How to Purchase
Subscribe to this dataset via AWS Data Exchange
Dataset
This data is provided in 4 formats: CSV, JSON, XML, and SQLite.
All formats provide 3 data points:
- ZipCode: 5 digit ZIP Code
- TimeZone: The official IANA time zone name. Possible values:
- America/Adak
- America/Anchorage
- America/Boise
- America/Chicago
- America/Denver
- America/Detroit
- America/Indiana/Indianapolis
- America/Indiana/Knox
- America/Indiana/Marengo
- America/Indiana/Petersburg
- America/Indiana/Tell_City
- America/Indiana/Vevay
- America/Indiana/Vincennes
- America/Indiana/Winamac
- America/Juneau
- America/Kentucky/Louisville
- America/Kentucky/Monticello
- America/Los_Angeles
- America/Menominee
- America/Metlakatla
- America/New_York
- America/Nome
- America/North_Dakota/Beulah
- America/North_Dakota/Center
- America/North_Dakota/New_Salem
- America/Phoenix
- America/Puerto_Rico
- America/Sitka
- America/St_Thomas
- America/Yakutat
- Pacific/Chuuk
- Pacific/Guam
- Pacific/Honolulu
- Pacific/Kosrae
- Pacific/Kwajalein
- Pacific/Majuro
- Pacific/Pago_Pago
- Pacific/Palau
- Pacific/Pohnpei
- Pacific/Saipan
- Pacific/Wake
- ObservesDST: whether the area observes Daylight Saving Time. Possible values:
- true
- false
Sample Data Files
Excluded Zip Codes
Excludes APO, DPO, FPO, and PARCEL RETURN SERVICE ZIP codes because they are non-geographic.