Apparatus

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sensors Mode-S transponder

06A391

ICAO 24-bit transponder address · allocated to Qatar

Currently assigned to A7-BTB · BOEING 777-200LR

Hex
06A391
Octal
01521621
Decimal
435,089
Country
QA
Tail
A7-BTB
Type
B77L
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
309
Distinct callsigns
20
Country
QA
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 06A391.

Country allocation

The ICAO 24-bit address 06A391 falls within the block assigned to Qatar (QA) by ICAO Annex 10, Volume III. Every aircraft registered in Qatar 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 20 distinct

Callsign Airline Flights Last seen
QTR8356 Qatar Airways 20 2026-04-20
QTR8357 Qatar Airways 18 2026-04-18
QTR8942 Qatar Airways 7 2026-05-25
QTR8282 Qatar Airways 7 2026-07-21
QTR8139 Qatar Airways 6 2026-05-11
QTR8963 - 5 2026-06-18
QTR8415 - 5 2026-07-19
QTR8401 - 5 2026-06-25
QTR8266 - 5 2026-07-04
QTR8160 Qatar Airways 5 2026-05-30
QTR72U Qatar Airways 5 2026-06-26
QTR3L Qatar Airways 5 2026-07-25
QTR8949 - 4 2026-06-24
QTR8400 - 4 2026-06-25
QTR8020 Qatar Airways 4 2026-07-19
QTR47V - 4 2026-07-01
QTR8984 - 3 2026-07-18
QTR8944 - 3 2026-07-03
QTR8943 - 3 2026-06-20
QTR8612 - 3 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QTR8974 - Jul 26, 21:55 UTCJul 26, 22:15 UTC20m
2026-07-26 QTR8220 LGG → ORD Jul 26, 13:10 UTCJul 26, 19:30 UTC6h 20m
2026-07-26 QTR8220 LGG → ORD Jul 26, 09:35 UTCJul 26, 10:55 UTC1h 20m
2026-07-26 QTR23J DOH → AMS Jul 26, 00:35 UTCJul 26, 07:10 UTC6h 36m
2026-07-25 QTR46N DUB → DOH Jul 25, 20:30 UTCJul 25, 21:20 UTC50m
2026-07-25 QTR3L BHX → DOH Jul 25, 10:50 UTCJul 25, 11:15 UTC25m
2026-07-25 QTR3L BHX → DOH Jul 25, 08:20 UTCJul 25, 08:50 UTC30m
2026-07-25 QTR3L BHX → DOH Jul 25, 00:55 UTCJul 25, 01:15 UTC20m
2026-07-24 QTR8423 HKG → DOH Jul 24, 16:20 UTCJul 24, 22:00 UTC5h 40m
2026-07-24 QTR8423 HKG → DOH Jul 24, 14:35 UTCJul 24, 14:45 UTC10m
2026-07-24 QTR8542 ORD → LAN Jul 24, 11:40 UTCJul 24, 12:20 UTC40m
2026-07-24 QTR8542 ORD → LAN Jul 24, 08:10 UTCJul 24, 10:00 UTC1h 50m
2026-07-24 QTR8542 ORD → LAN Jul 24, 01:25 UTCJul 24, 04:40 UTC3h 15m
2026-07-23 QTR8224 BRU → DOH Jul 23, 10:30 UTCJul 23, 15:55 UTC5h 25m
2026-07-21 QTR90G - Jul 21, 08:45 UTCJul 21, 14:35 UTC5h 50m
2026-07-21 QTR8282 LHR → MXP Jul 21, 00:00 UTCJul 21, 00:40 UTC40m
2026-07-20 QTR8282 LHR → MXP Jul 20, 19:05 UTCJul 20, 23:00 UTC3h 55m
2026-07-20 QTR8282 LHR → MXP Jul 20, 16:05 UTCJul 20, 17:15 UTC1h 10m
2026-07-20 QTR45A - Jul 20, 06:05 UTCJul 20, 13:15 UTC7h 10m
2026-07-19 QTR8415 HKG → DOH Jul 19, 22:00 UTCJul 20, 03:45 UTC5h 45m
2026-07-19 QTR8415 - Jul 19, 20:20 UTCJul 19, 20:25 UTC5m
2026-07-19 QTR8020 BSL → DOH Jul 19, 17:55 UTCJul 19, 18:15 UTC20m
2026-07-19 QTR8020 BSL → DOH Jul 19, 15:35 UTCJul 19, 15:45 UTC10m
2026-07-18 QTR8020 BSL → DOH Jul 18, 18:20 UTCJul 19, 12:55 UTC18h 35m
2026-07-18 QTR8020 BSL → DOH Jul 18, 18:00 UTCJul 19, 12:55 UTC18h 55m
2026-07-18 QTR8984 - Jul 18, 09:55 UTCJul 18, 16:00 UTC6h 5m
2026-07-18 QTR8981 ICN → DOH Jul 18, 02:55 UTCJul 18, 03:05 UTC10m
2026-07-17 QTR8981 ICN → DOH Jul 17, 18:00 UTCJul 18, 01:10 UTC7h 10m
2026-07-17 QTR8980 DOH → ICN Jul 17, 09:50 UTCJul 17, 15:44 UTC5h 55m
2026-07-16 QTR8407 - Jul 16, 23:05 UTCJul 17, 04:39 UTC5h 35m
2026-07-16 QTR8407 - Jul 16, 21:15 UTCJul 16, 21:30 UTC15m
2026-07-16 QTR8406 - Jul 16, 18:25 UTCJul 16, 18:40 UTC15m
2026-07-16 QTR8406 - Jul 16, 10:20 UTCJul 16, 17:30 UTC7h 10m
2026-07-15 QTR8406 - Jul 15, 17:10 UTCJul 16, 06:50 UTC13h 40m
2026-07-15 QTR8467 - Jul 15, 05:45 UTCJul 15, 11:25 UTC5h 40m
2026-07-15 QTR8467 - Jul 15, 03:55 UTCJul 15, 04:15 UTC20m
2026-07-15 QTR8040 - Jul 15, 00:55 UTCJul 15, 01:40 UTC45m
2026-07-14 QTR8040 - Jul 14, 17:25 UTCJul 14, 23:10 UTC5h 44m
2026-07-14 QTR8087 - Jul 14, 01:00 UTCJul 14, 14:55 UTC13h 55m
2026-07-13 QTR8086 - Jul 13, 20:20 UTCJul 13, 22:15 UTC1h 55m
2026-07-13 QTR8086 - Jul 13, 14:05 UTCJul 13, 19:55 UTC5h 50m
2026-07-13 QTR8086 - Jul 13, 05:25 UTCJul 13, 12:10 UTC6h 45m
2026-07-12 QTR8361 - Jul 12, 21:15 UTCJul 13, 03:45 UTC6h 30m
2026-07-12 QTR8360 - Jul 12, 11:10 UTCJul 12, 18:30 UTC7h 20m
2026-07-11 QTR8969 - Jul 11, 17:45 UTCJul 12, 08:50 UTC15h 5m
2026-07-11 QTR8968 - Jul 11, 17:15 UTCJul 11, 17:40 UTC25m
2026-07-11 QTR44T - Jul 11, 13:50 UTCJul 11, 14:20 UTC30m
2026-07-11 QTR44T - Jul 11, 01:30 UTCJul 11, 12:30 UTC11h 0m
2026-07-10 QTR87J - Jul 10, 14:10 UTCJul 10, 22:55 UTC8h 45m
2026-07-10 QTR87J - Jul 10, 05:40 UTCJul 10, 12:00 UTC6h 20m

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 A7-BTB page for operator, model, and routing details .

Mode-S 06A391 frequently asked

What is Mode-S code 06A391?
06A391 is an ICAO 24-bit transponder address. Allocated to Qatar. Assigned to A7-BTB.
Where is Mode-S 06A391 registered?
Mode-S code 06A391 is allocated to Qatar (QA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 06A391 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 06A391, octal 01521621, decimal 435,089.
What flights does 06A391 operate?
Mode-S 06A391 has broadcast 20 distinct callsigns, including QTR8356, QTR8357, QTR8942, QTR8282, QTR8139.