Apparatus

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sensors Mode-S transponder

731A2B

ICAO 24-bit transponder address · allocated to Iran

Currently assigned to EP-FQK · AIRBUS A-300-600

Hex
731A2B
Octal
34615053
Decimal
7,543,339
Country
IR
Tail
EP-FQK
Type
A306
No current signal · last broadcast 8d ago
Flights observed
150
Distinct callsigns
8
Country
IR
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 731A2B.

Country allocation

The ICAO 24-bit address 731A2B falls within the block assigned to Iran (IR) by ICAO Annex 10, Volume III. Every aircraft registered in Iran receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 8 distinct

Callsign Airline Flights Last seen
QSM2213 - 102 2026-07-26
QSM2212 - 23 2026-07-26
QSM2299 - 10 2026-07-01
QSM2215 - 4 2026-07-15
QSM2285 - 3 2026-05-23
QSM2284 - 3 2026-05-22
QSM2214 - 3 2026-07-15
QSM2298 - 2 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QSM2212 - Jul 26, 10:35 UTCJul 26, 11:35 UTC1h 0m
2026-07-26 QSM2213 - Jul 26, 07:40 UTCJul 26, 09:10 UTC1h 30m
2026-07-25 QSM2213 - Jul 25, 10:50 UTCJul 26, 09:10 UTC22h 21m
2026-07-25 QSM2212 - Jul 25, 10:40 UTCJul 26, 08:45 UTC22h 6m
2026-07-25 QSM2213 - Jul 25, 06:55 UTCJul 25, 08:25 UTC1h 30m
2026-07-24 QSM2213 - Jul 24, 11:40 UTCJul 25, 08:25 UTC20h 45m
2026-07-24 QSM2213 - Jul 24, 08:05 UTCJul 24, 09:40 UTC1h 35m
2026-07-23 QSM2213 - Jul 23, 10:50 UTCJul 24, 09:40 UTC22h 50m
2026-07-23 QSM2212 - Jul 23, 10:25 UTCJul 24, 08:25 UTC22h 0m
2026-07-23 QSM2213 - Jul 23, 06:45 UTCJul 23, 08:15 UTC1h 30m
2026-07-22 QSM2213 - Jul 22, 11:10 UTCJul 23, 08:15 UTC21h 5m
2026-07-21 QSM2212 - Jul 21, 11:10 UTCJul 21, 12:15 UTC1h 5m
2026-07-21 QSM2213 - Jul 21, 08:50 UTCJul 21, 09:20 UTC30m
2026-07-20 QSM2212 - Jul 20, 10:50 UTCJul 21, 09:20 UTC22h 30m
2026-07-20 QSM2213 - Jul 20, 06:55 UTCJul 20, 08:20 UTC1h 25m
2026-07-19 QSM2213 - Jul 19, 11:00 UTCJul 20, 08:20 UTC21h 20m
2026-07-19 QSM2213 - Jul 19, 07:25 UTCJul 19, 08:50 UTC1h 25m
2026-07-18 QSM2213 - Jul 18, 10:50 UTCJul 19, 08:50 UTC22h 0m
2026-07-18 QSM2213 - Jul 18, 10:35 UTCJul 19, 08:45 UTC22h 10m
2026-07-18 QSM2213 - Jul 18, 07:00 UTCJul 18, 08:25 UTC1h 25m
2026-07-17 QSM2213 - Jul 17, 10:50 UTCJul 18, 08:25 UTC21h 36m
2026-07-17 QSM2213 - Jul 17, 10:30 UTCJul 18, 08:25 UTC21h 56m
2026-07-17 QSM2213 - Jul 17, 07:14 UTCJul 17, 08:40 UTC1h 25m
2026-07-16 QSM2213 - Jul 16, 10:59 UTCJul 17, 08:40 UTC21h 40m
2026-07-16 QSM2213 - Jul 16, 08:35 UTCJul 16, 08:50 UTC15m
2026-07-15 QSM2214 - Jul 15, 20:45 UTCJul 16, 07:50 UTC11h 5m
2026-07-15 QSM2215 - Jul 15, 16:30 UTCJul 15, 17:55 UTC1h 25m
2026-07-14 QSM2213 - Jul 14, 07:30 UTCJul 14, 07:50 UTC20m
2026-07-13 QSM2212 - Jul 13, 11:00 UTCJul 14, 07:50 UTC20h 50m
2026-07-13 QSM2213 - Jul 13, 08:25 UTCJul 13, 09:00 UTC35m
2026-07-12 QSM2212 - Jul 12, 13:20 UTCJul 13, 07:40 UTC18h 20m
2026-07-12 QSM2213 - Jul 12, 10:40 UTCJul 12, 11:15 UTC35m
2026-07-11 QSM2212 - Jul 11, 10:55 UTCJul 12, 10:45 UTC23h 50m
2026-07-11 QSM2213 - Jul 11, 07:45 UTCJul 11, 09:10 UTC1h 25m
2026-07-10 QSM2213 - Jul 10, 11:20 UTCJul 11, 09:10 UTC21h 50m
2026-07-10 QSM2213 - Jul 10, 07:55 UTCJul 10, 09:30 UTC1h 35m
2026-07-09 QSM2213 - Jul 9, 11:25 UTCJul 10, 09:30 UTC22h 5m
2026-07-09 QSM2213 - Jul 9, 07:40 UTCJul 9, 09:15 UTC1h 35m
2026-07-08 QSM2213 - Jul 8, 11:05 UTCJul 9, 09:15 UTC22h 10m
2026-07-08 QSM2213 - Jul 8, 07:10 UTCJul 8, 08:35 UTC1h 25m
2026-07-01 QSM2214 - Jul 1, 20:45 UTCJul 1, 21:50 UTC1h 5m
2026-07-01 QSM2215 - Jul 1, 10:50 UTCJul 1, 18:15 UTC7h 25m
2026-07-01 QSM2299 - Jul 1, 07:25 UTCJul 1, 08:50 UTC1h 25m
2026-06-30 QSM2299 - Jun 30, 12:50 UTCJul 1, 08:50 UTC20h 0m
2026-06-30 QSM2213 - Jun 30, 09:35 UTCJun 30, 11:05 UTC1h 30m
2026-06-29 QSM2213 - Jun 29, 12:49 UTCJun 30, 11:05 UTC22h 16m
2026-06-29 QSM2213 - Jun 29, 12:24 UTCJun 30, 10:45 UTC22h 21m
2026-06-28 QSM2213 - Jun 28, 13:04 UTCJun 29, 08:35 UTC19h 30m
2026-06-28 QSM2213 - Jun 28, 12:19 UTCJun 29, 08:35 UTC20h 15m
2026-06-27 QSM2299 - Jun 27, 15:00 UTCJun 28, 10:04 UTC19h 5m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the EP-FQK page for operator, model, and routing details .

Mode-S 731A2B frequently asked

What is Mode-S code 731A2B?
731A2B is an ICAO 24-bit transponder address. Allocated to Iran. Assigned to EP-FQK.
Where is Mode-S 731A2B registered?
Mode-S code 731A2B is allocated to Iran (IR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 731A2B broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 731A2B, octal 34615053, decimal 7,543,339.
What flights does 731A2B operate?
Mode-S 731A2B has broadcast 8 distinct callsigns, including QSM2213, QSM2212, QSM2299, QSM2215, QSM2285.