Apparatus

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sensors Mode-S transponder

06A373

ICAO 24-bit transponder address · allocated to Qatar

Currently assigned to A7-BOB · BOEING 777-300ER

Hex
06A373
Octal
01521563
Decimal
435,059
Country
QA
Tail
A7-BOB
Type
B77W
No current signal · last broadcast Jul 26, 19:55 UTC
Flights observed
165
Distinct callsigns
20
Country
QA
Last broadcast
Jul 26, 19:55 UTC

Last known position

Most recent position reported by Mode-S 06A373.

Country allocation

The ICAO 24-bit address 06A373 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
QTR818 Qatar Airways 22 2026-07-23
QTR815 Qatar Airways 20 2026-07-25
QTR817 Qatar Airways 18 2026-07-23
QTR816 Qatar Airways 16 2026-07-25
QTR23V - 9 2026-07-04
QTR73C - 8 2026-07-04
QTR2H - 7 2026-07-21
QTR20K Qatar Airways 6 2026-07-26
QTR1171 Qatar Airways 6 2026-07-21
QTR7A - 5 2026-07-09
QTR5V Qatar Airways 5 2026-07-26
QTR22C - 5 2026-07-20
QTR6B Qatar Airways 4 2026-07-17
QTR675 - 4 2026-07-07
QTR3M Qatar Airways 4 2026-07-26
QTR23Y - 4 2026-07-12
QTR1172 - 3 2026-07-21
QTR1167 Qatar Airways 3 2026-07-22
QTR61G Qatar Airways 2 2026-06-08
QTR1173 Qatar Airways 2 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QTR20K DOH → STN Jul 26, 19:10 UTCJul 26, 19:55 UTC45m
2026-07-26 QTR3M TBS → DOH Jul 26, 16:25 UTCJul 26, 17:10 UTC45m
2026-07-26 QTR5V DOH → IAH Jul 26, 04:55 UTCJul 26, 13:05 UTC8h 11m
2026-07-25 QTR815 HKG → DOH Jul 25, 18:30 UTCJul 25, 23:25 UTC4h 55m
2026-07-25 QTR815 HKG → DOH Jul 25, 17:50 UTCJul 25, 17:55 UTC5m
2026-07-25 QTR816 DOH → HKG Jul 25, 06:15 UTCJul 25, 13:50 UTC7h 35m
2026-07-24 QTR815 HKG → DOH Jul 24, 17:45 UTCJul 25, 01:15 UTC7h 30m
2026-07-24 QTR816 DOH → HKG Jul 24, 07:45 UTCJul 24, 11:40 UTC3h 55m
2026-07-23 QTR817 HKG → DOH Jul 23, 12:50 UTCJul 23, 19:35 UTC6h 45m
2026-07-23 QTR817 HKG → DOH Jul 23, 12:10 UTCJul 23, 12:20 UTC10m
2026-07-23 QTR818 DOH → HKG Jul 23, 06:35 UTCJul 23, 07:10 UTC35m
2026-07-22 QTR818 DOH → HKG Jul 22, 12:20 UTCJul 23, 04:55 UTC16h 35m
2026-07-22 QTR1167 RUH → DOH Jul 22, 03:30 UTCJul 22, 04:00 UTC30m
2026-07-22 QTR1166 - Jul 22, 00:20 UTCJul 22, 01:05 UTC45m
2026-07-21 QTR1173 RUH → DOH Jul 21, 21:00 UTCJul 21, 21:35 UTC35m
2026-07-21 QTR1172 - Jul 21, 17:50 UTCJul 21, 18:00 UTC10m
2026-07-21 QTR1172 - Jul 21, 16:35 UTCJul 21, 17:10 UTC35m
2026-07-21 QTR1171 RUH → DOH Jul 21, 09:05 UTCJul 21, 10:00 UTC55m
2026-07-21 QTR1170 DOH → RUH Jul 21, 05:40 UTCJul 21, 06:25 UTC45m
2026-07-21 QTR2H - Jul 21, 02:00 UTCJul 21, 02:45 UTC45m
2026-07-20 QTR22C - Jul 20, 22:40 UTCJul 20, 23:30 UTC50m
2026-07-20 QTR817 - Jul 20, 14:10 UTCJul 20, 20:00 UTC5h 50m
2026-07-20 QTR817 - Jul 20, 12:25 UTCJul 20, 12:40 UTC15m
2026-07-19 QTR818 DOH → HKG Jul 19, 23:25 UTCJul 20, 07:40 UTC8h 15m
2026-07-18 QTR1171 - Jul 18, 09:15 UTCJul 18, 10:00 UTC45m
2026-07-18 QTR2H - Jul 18, 02:05 UTCJul 18, 02:55 UTC51m
2026-07-17 QTR20K - Jul 17, 19:20 UTCJul 17, 20:10 UTC50m
2026-07-17 QTR5V DOH → IAH Jul 17, 10:15 UTCJul 17, 12:55 UTC2h 40m
2026-07-17 QTR6B DOH → JFK Jul 17, 04:54 UTCJul 17, 07:20 UTC2h 25m
2026-07-16 QTR815 - Jul 16, 19:35 UTCJul 17, 01:35 UTC6h 0m
2026-07-16 QTR815 - Jul 16, 17:45 UTCJul 16, 18:00 UTC15m
2026-07-16 QTR816 - Jul 16, 13:20 UTCJul 16, 14:15 UTC55m
2026-07-16 QTR816 - Jul 16, 05:55 UTCJul 16, 11:34 UTC5h 40m
2026-07-15 QTR815 - Jul 15, 19:50 UTCJul 16, 01:30 UTC5h 40m
2026-07-15 QTR815 - Jul 15, 17:55 UTCJul 15, 18:10 UTC15m
2026-07-15 QTR816 - Jul 15, 06:15 UTCJul 15, 13:55 UTC7h 40m
2026-07-14 QTR815 - Jul 14, 18:00 UTCJul 15, 01:30 UTC7h 29m
2026-07-14 QTR816 - Jul 14, 13:25 UTCJul 14, 14:00 UTC35m
2026-07-14 QTR816 - Jul 14, 06:00 UTCJul 14, 11:40 UTC5h 40m
2026-07-13 QTR1166 DOH → DOH Jul 13, 23:25 UTCJul 14, 03:25 UTC4h 0m
2026-07-13 QTR20K - Jul 13, 19:20 UTCJul 13, 20:05 UTC45m
2026-07-13 QTR3M - Jul 13, 16:30 UTCJul 13, 17:20 UTC50m
2026-07-13 QTR5V - Jul 13, 10:15 UTCJul 13, 10:50 UTC35m
2026-07-13 QTR6B - Jul 13, 05:40 UTCJul 13, 07:55 UTC2h 15m
2026-07-12 QTR23Y - Jul 12, 06:45 UTCJul 12, 12:15 UTC5h 30m
2026-07-11 QTR815 - Jul 11, 19:30 UTCJul 11, 23:25 UTC3h 55m
2026-07-11 QTR815 - Jul 11, 17:40 UTCJul 11, 17:55 UTC15m
2026-07-11 QTR816 - Jul 11, 13:20 UTCJul 11, 13:50 UTC30m
2026-07-11 QTR816 - Jul 11, 05:50 UTCJul 11, 11:35 UTC5h 45m
2026-07-11 QTR2H DXB → DOH Jul 11, 02:10 UTCJul 11, 03:01 UTC50m

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-BOB page for operator, model, and routing details .

Mode-S 06A373 frequently asked

What is Mode-S code 06A373?
06A373 is an ICAO 24-bit transponder address. Allocated to Qatar. Assigned to A7-BOB.
Where is Mode-S 06A373 registered?
Mode-S code 06A373 is allocated to Qatar (QA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 06A373 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 06A373, octal 01521563, decimal 435,059.
What flights does 06A373 operate?
Mode-S 06A373 has broadcast 20 distinct callsigns, including QTR818, QTR815, QTR817, QTR816, QTR23V.