ZIP Code to Time Zone Converter
Enter any US ZIP code to instantly find its time zone, current local time, UTC offset, and daylight saving time status.
Single ZIP Code Lookup
Bulk ZIP Code Lookup
Enter multiple ZIP codes separated by commas, spaces, or new lines.
US Time Zone Quick Reference
How to Use This Tool
Enter a ZIP Code
Type any valid 5-digit US ZIP code into the input field above. For example, try 10001 (New York) or 90210 (Beverly Hills).
Click "Find Time Zone"
Hit the button or press Enter. Results appear instantly — no page reload needed. The tool works entirely in your browser.
Read Your Results
See the time zone abbreviation, full name, live local time, UTC offset, DST status, state name, and IANA timezone identifier.
Use Bulk Lookup
Need to check many ZIP codes at once? Use the Bulk Lookup section. Paste dozens of ZIPs separated by commas or new lines.
What Is a ZIP Code Time Zone?
Every US ZIP code belongs to a specific geographic area, and each area falls within one of the official US time zones. The United States spans six main time zones: Eastern (ET), Central (CT), Mountain (MT), Pacific (PT), Alaska (AKT), and Hawaii–Aleutian (HT). Some states like Florida, Indiana, Kentucky, and Tennessee are split between two time zones — making a reliable ZIP-to-timezone lookup especially useful.
A ZIP code to time zone lookup is useful for businesses scheduling meetings across states, developers building scheduling software, e-commerce stores showing correct delivery times, and anyone coordinating with people in a different part of the country.
How ZIP Codes Map to Time Zones
ZIP codes were created by the US Postal Service for mail delivery — not for geographic or time zone accuracy. However, because ZIP codes are assigned by region, each ZIP code range corresponds reliably to a US state, and most states fall entirely within a single time zone.
This tool uses ZIP code range data per state (maintained by USPS and StructNet) combined with official Wikipedia time zone data to determine the correct time zone for any given ZIP. For states that are split across time zones — like Indiana, Tennessee, Kentucky, Florida, and others — the tool applies the dominant or most common time zone for that state's ZIP range.
Daylight Saving Time (DST) by State
Most US states observe Daylight Saving Time (DST), moving clocks forward 1 hour in spring and back in fall. However, Arizona (except the Navajo Nation) and Hawaii do not observe DST. US territories like Puerto Rico, Guam, the US Virgin Islands, American Samoa, and the Northern Mariana Islands also do not observe DST.
This tool accurately reflects DST status for each ZIP code so you always see the correct current local time — whether it is standard time or daylight saving time.
Common Use Cases
- 📞 Call centers: Know when customers are available before calling
- 📅 Meeting scheduling: Avoid accidentally booking a 6 AM meeting for someone in California
- 🛒 E-commerce: Show accurate same-day shipping cutoff times by ZIP
- 💻 Developers: Map user ZIP codes to IANA timezone IDs for apps
- 📦 Logistics: Coordinate delivery windows across multiple states
- 📰 Media/publishing: Schedule content releases for specific time zones
- 🧑💼 Remote teams: Quickly check a colleague's local time by ZIP
Popular ZIP Code Examples
| ZIP Code | City / Area | State | Time Zone | UTC Offset | DST |
|---|---|---|---|---|---|
| 10001 | New York City | NY | Eastern (ET) | UTC−5 / UTC−4 | Yes |
| 90210 | Beverly Hills | CA | Pacific (PT) | UTC−8 / UTC−7 | Yes |
| 60601 | Chicago | IL | Central (CT) | UTC−6 / UTC−5 | Yes |
| 77001 | Houston | TX | Central (CT) | UTC−6 / UTC−5 | Yes |
| 85001 | Phoenix | AZ | Mountain (MT) | UTC−7 (no DST) | No |
| 98101 | Seattle | WA | Pacific (PT) | UTC−8 / UTC−7 | Yes |
| 33101 | Miami | FL | Eastern (ET) | UTC−5 / UTC−4 | Yes |
| 80201 | Denver | CO | Mountain (MT) | UTC−7 / UTC−6 | Yes |
| 30301 | Atlanta | GA | Eastern (ET) | UTC−5 / UTC−4 | Yes |
| 99501 | Anchorage | AK | Alaska (AKT) | UTC−9 / UTC−8 | Yes |
| 96701 | Aiea, Hawaii | HI | Hawaii (HT) | UTC−10 | No |
| 73301 | Austin (TX IRS) | TX | Central (CT) | UTC−6 / UTC−5 | Yes |
Frequently Asked Questions
This tool is highly accurate for the vast majority of US ZIP codes. It uses ZIP code range data cross-referenced with official state time zone data. The only edge cases are ZIP codes in counties that are split between two time zones (such as certain counties in Indiana, Kentucky, Tennessee, or Florida). In those cases, the tool returns the dominant time zone for the state or region.
Arizona opted out of Daylight Saving Time under the Uniform Time Act of 1967. The state legislature decided that adding an extra hour of evening sunlight in an already hot desert climate was not beneficial. Arizona permanently observes Mountain Standard Time (MST, UTC−7). Note: the Navajo Nation within Arizona does observe DST.
Several US states span two time zones: Florida (Eastern and Central), Indiana (Eastern and Central), Kentucky (Eastern and Central), Tennessee (Eastern and Central), Michigan (Eastern and Central), Kansas (Central and Mountain), Nebraska (Central and Mountain), North Dakota (Central and Mountain), South Dakota (Central and Mountain), Texas (Central and Mountain), Idaho (Mountain and Pacific), Oregon (Mountain and Pacific), Nevada (Mountain and Pacific), and Alaska (Alaska and Hawaii–Aleutian).
An IANA (Internet Assigned Numbers Authority) time zone ID is a standardized string used by software systems to identify a time zone. For example, America/New_York for Eastern Time, America/Chicago for Central Time, America/Denver for Mountain Time, and America/Los_Angeles for Pacific Time. These IDs automatically handle DST transitions and are used in programming languages, databases, and APIs worldwide.
In the United States, Daylight Saving Time (DST) begins on the second Sunday of March at 2:00 AM (clocks spring forward 1 hour) and ends on the first Sunday of November at 2:00 AM (clocks fall back 1 hour). This applies to all states except Arizona and Hawaii, and all territories except Puerto Rico, Guam, US Virgin Islands, American Samoa, and Northern Mariana Islands.
Yes. This tool covers ZIP codes for US territories including Puerto Rico (ZIP 00600–00988, Atlantic Time UTC−4, no DST), Guam (ZIP 96910–96932, Chamorro Time UTC+10, no DST), US Virgin Islands (ZIP 00801–00805, Atlantic Time UTC−4, no DST), American Samoa (ZIP 96799, Samoa Time UTC−11, no DST), and Northern Mariana Islands (ZIP 96950–96952, Chamorro Time UTC+10, no DST).
No. This tool is designed specifically for US ZIP codes (5-digit numeric format). Canadian postal codes use a different alphanumeric format (e.g., M5V 3A8) and are not supported. For international time zone lookups, you would need a separate tool using city or country-based data.