When to call Iran (+98)
Iran runs on IRST — UTC+3:30, with a Thursday–Friday weekend. Knowing the best time to call Iran on +98 means catching Tehran on a Saturday-through-Wednesday morning, clear of prayer times.
IRST, at a glance.
See the live gap between a global reference city and Iran's single IRST zone — no calculator needed.
Iran against the world's hubs.
Compare live Iranian time against New York, London and Dubai so your call lands inside Tehran office hours.
Understanding the time difference between the United States and Iran
Time zone differences across other major countries
Why timing matters for calls to Iran.
Iran's Thursday–Friday weekend and mid-day prayer breaks mean the effective connect window is narrower than the clock suggests.
The best windows to reach Iran.
Four factors that decide when an Iranian prospect picks up — tuned to the IRST working week.
Iran runs at +03:30
The zone is Asia/Tehran. Every window on this page is worked out from that offset rather than a rule of thumb, so the times shown are the ones that actually apply to Iran.
No daylight saving
Iran stays on +03:30 all year. The windows below only move when the caller's own country changes its clocks, not when Iran does.
Shared hours with 3 of 5 markets
Callers in London, Mumbai, Sydney share part of the working day with Iran. The table above gives the exact intersection for each.
Where the gap is too wide
There is no 9-to-5 overlap with New York, Los Angeles. Calling Iran from those cities means someone is working outside normal hours — worth saying so when you book the call.
How to call Iran using the +98 code.
Four simple steps for every call into Iran — including the leading-zero rule.
Number anatomy
Dial exit code
Press + on mobile or 00 from most landlines. This opens an international line.
Enter +98
Iran's international code. Every call to Iran must start with +98.
Area prefix
Add the local area or mobile network code — always drop any leading zero used for domestic calls.
Full number
Dial the remaining subscriber digits. Your number is now correctly formatted for international routing.
Best time to call — every country.
Jump to any country's best-time-to-call guide. Search by name, ISO or dial prefix.
Reach Iranian customers in their window, on verified routes.
Free trial · No card required · Port numbers free · Month-to-month
When your working day overlaps Iran
Callers in London, Mumbai and Sydney share part of the working day with Iran. There is no shared working window with New York and Los Angeles.
| Calling from | Iran is | Call at (your time) | Which is (their time) |
|---|---|---|---|
| New York | 8h 30m ahead | No shared working hours — you would need to call outside 9am-5pm | |
| Los Angeles | 11h 30m ahead | No shared working hours — you would need to call outside 9am-5pm | |
| London | 3h 30m ahead | 9:00 AM – 1:30 PM | 12:30 PM – 5:00 PM |
| Mumbai | 2h behind | 11:00 AM – 5:00 PM | 9:00 AM – 3:00 PM |
| Sydney | 7h 30m behind | 4:30 PM – 5:00 PM | 9:00 AM – 9:30 AM |
Windows are the intersection of a 9am-5pm working day in each place, using Iran'sstandard-time offset of +03:30. Iran does not observe daylight saving, so these windows hold all year — though they shift when the caller's own country changes its clocks.
FAQ
Calling Iran, answered.
Time zone, daylight saving and dialling questions for Iran (+98).