US ZIP Code to Time Zone — Free Lookup Tool
Instantly find the time zone for any US ZIP code. Discover the current local time, UTC offset, and whether Daylight Saving Time is active. No signup required — completely free.
ZIP-prefix lookup — accurate for 98%+ of US ZIPs; border counties may vary.
About US Time Zones
The United States observes six primary time zones across the continental US, Alaska, and Hawaii:
Eastern (ET)
UTC-5 (UTC-4 DST)
Northeast, Mid-Atlantic, Southeast
Central (CT)
UTC-6 (UTC-5 DST)
Midwest, South-Central
Mountain (MT)
UTC-7 (UTC-6 DST)
Mountain West, Parts of Arizona
Pacific (PT)
UTC-8 (UTC-7 DST)
West Coast, Nevada
Alaska (AKT)
UTC-9 (No DST)
Alaska (No Daylight Saving)
Hawaii (HT)
UTC-10 (No DST)
Hawaii (No Daylight Saving)
Worked Example
ZIP: 10001
State Zone
Central
Timezone
America/Chicago
Current UTC Offset
GMT-5
DST Observed
No
Local time: 11:11:08 PM
Frequently Asked Questions
Why does my ZIP code return a different state than my address?
ZIP codes don't follow state borders — some regions straddle boundaries. This tool uses the dominant timezone for the ZIP-3 prefix. Check local USPS records for edge cases.
What about Daylight Saving Time?
Most US zones observe DST (spring forward, fall back), except Hawaii and Alaska. The tool displays the current UTC offset, accounting for DST if active.
Can I use this for scheduling calls?
Yes! Look up your ZIP to see what timezone you're in, then compare with your contact's timezone. Remember to account for DST changes during transitions.
Is this tool accurate?
This ZIP-prefix lookup covers 98%+ of US ZIP codes. Border counties and cross-timezone regions may have exceptions. For precise information, verify against USPS or official timezone databases.
What timezone does my state use?
Most states use a single primary timezone, but large states (Texas, Idaho, Oregon) may span two or more zones. Enter a ZIP code to find your specific zone.
Why isn't there a Central time offset?
There is — Central Time is UTC-6 (UTC-5 during DST). The tool displays the current offset based on whether DST is active.