Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

06A109

ICAO 24-bit transponder address · allocated to Qatar

Currently assigned to A7-ALU · AIRBUS A-350-900

Hex
06A109
Octal
01520411
Decimal
434,441
Country
QA
Tail
A7-ALU
Type
A359
No current signal · last broadcast Jul 26, 19:40 UTC
Flights observed
234
Distinct callsigns
20
Country
QA
Last broadcast
Jul 26, 19:40 UTC

Last known position

Most recent position reported by Mode-S 06A109.

Country allocation

The ICAO 24-bit address 06A109 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
QTR957 - 9 2026-07-13
QTR956 - 8 2026-07-13
QTR4T Qatar Airways 8 2026-07-25
QTR959 Qatar Airways 6 2026-06-07
QTR958 Qatar Airways 6 2026-06-06
QTR7C Qatar Airways 6 2026-07-17
QTR74N Qatar Airways 6 2026-06-08
QTR49F Qatar Airways 6 2026-06-08
QTR2R - 6 2026-06-29
QTR881 - 5 2026-07-20
QTR53X Qatar Airways 5 2026-07-23
QTR19W - 5 2026-06-24
QTR99X - 4 2026-07-07
QTR955 - 4 2026-07-04
QTR954 - 4 2026-07-04
QTR8Q Qatar Airways 4 2026-06-13
QTR88T - 4 2026-07-21
QTR880 - 4 2026-07-20
QTR85R - 4 2026-07-16
QTR54X - 4 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QTR24G DOH → MCT Jul 26, 18:00 UTCJul 26, 19:40 UTC1h 40m
2026-07-26 QTR85B DOH → LAX Jul 26, 14:05 UTCJul 26, 16:10 UTC2h 5m
2026-07-25 QTR4T NCE → DOH Jul 25, 14:25 UTCJul 25, 19:45 UTC5h 20m
2026-07-24 QTR7F DXB → DOH Jul 24, 16:55 UTCJul 25, 01:55 UTC9h 0m
2026-07-24 QTR37A FCO → DOH Jul 24, 08:15 UTCJul 24, 13:15 UTC5h 0m
2026-07-23 QTR53X DOH → ISU Jul 23, 23:55 UTCJul 24, 00:30 UTC35m
2026-07-23 QTR18M AMS → ORD Jul 23, 15:05 UTCJul 23, 21:40 UTC6h 35m
2026-07-23 QTR83R - Jul 23, 08:05 UTCJul 23, 12:45 UTC4h 40m
2026-07-21 QTR52W ZRH → DOH Jul 21, 19:45 UTCJul 21, 20:25 UTC40m
2026-07-21 QTR88T - Jul 21, 06:05 UTCJul 21, 06:30 UTC25m
2026-07-20 QTR881 - Jul 20, 20:00 UTCJul 21, 01:30 UTC5h 30m
2026-07-20 QTR881 - Jul 20, 04:20 UTCJul 21, 01:30 UTC21h 10m
2026-07-20 QTR881 - Jul 20, 03:20 UTCJul 21, 01:30 UTC22h 9m
2026-07-20 QTR880 - Jul 20, 01:15 UTCJul 20, 23:40 UTC22h 25m
2026-07-20 QTR880 - Jul 20, 00:05 UTCJul 20, 21:45 UTC21h 40m
2026-07-19 QTR880 - Jul 19, 23:20 UTCJul 20, 00:00 UTC40m
2026-07-19 QTR27G - Jul 19, 14:35 UTCJul 19, 19:35 UTC5h 0m
2026-07-18 QTR92Q - Jul 18, 18:20 UTCJul 19, 12:25 UTC18h 5m
2026-07-17 QTR829 - Jul 17, 20:20 UTCJul 18, 14:25 UTC18h 6m
2026-07-17 QTR826 - Jul 17, 08:00 UTCJul 17, 12:45 UTC4h 45m
2026-07-17 QTR7C DOH → JNB Jul 17, 01:25 UTCJul 17, 02:25 UTC1h 0m
2026-07-16 QTR7C DOH → JNB Jul 16, 22:45 UTCJul 16, 22:59 UTC15m
2026-07-16 QTR85R - Jul 16, 16:55 UTCJul 16, 20:49 UTC3h 55m
2026-07-16 QTR1241 - Jul 16, 06:20 UTCJul 16, 10:45 UTC4h 25m
2026-07-15 QTR813 - Jul 15, 17:15 UTCJul 15, 22:20 UTC5h 5m
2026-07-15 QTR812 DOH → HND Jul 15, 05:45 UTCJul 15, 15:15 UTC9h 30m
2026-07-14 QTR88T - Jul 14, 06:25 UTCJul 14, 06:45 UTC20m
2026-07-13 QTR957 - Jul 13, 11:55 UTCJul 13, 19:30 UTC7h 35m
2026-07-13 QTR956 - Jul 13, 00:35 UTCJul 13, 08:55 UTC8h 20m
2026-07-12 QTR4T - Jul 12, 14:45 UTCJul 12, 20:30 UTC5h 45m
2026-07-12 QTR055 - Jul 12, 06:15 UTCJul 12, 12:15 UTC6h 0m
2026-07-11 QTR93P - Jul 11, 20:40 UTCJul 11, 21:20 UTC40m
2026-07-10 QTR41N - Jul 10, 23:55 UTCJul 11, 00:30 UTC35m
2026-07-10 QTR4T - Jul 10, 14:25 UTCJul 10, 19:55 UTC5h 30m
2026-07-10 QTR055 DOH → NCE Jul 10, 05:45 UTCJul 10, 11:50 UTC6h 5m
2026-07-10 QTR9T - Jul 10, 03:00 UTCJul 10, 03:25 UTC25m
2026-07-09 QTR9T - Jul 9, 23:10 UTCJul 10, 01:35 UTC2h 25m
2026-07-09 QTR2V DOH → CCU Jul 9, 16:25 UTCJul 9, 21:00 UTC4h 35m
2026-07-09 QTR1165 - Jul 9, 13:15 UTCJul 9, 14:00 UTC45m
2026-07-09 QTR83B - Jul 9, 03:10 UTCJul 9, 03:45 UTC35m
2026-07-08 QTR85P - Jul 8, 16:05 UTCJul 8, 16:25 UTC20m
2026-07-08 QTR6F - Jul 8, 07:55 UTCJul 8, 13:10 UTC5h 15m
2026-07-07 QTR9B DOH → ZRH Jul 7, 23:50 UTCJul 8, 05:45 UTC5h 55m
2026-07-07 QTR99X MXP → DOH Jul 7, 14:45 UTCJul 7, 20:00 UTC5h 15m
2026-07-07 QTR97L - Jul 7, 05:35 UTCJul 7, 11:55 UTC6h 20m
2026-07-06 QTR88T - Jul 6, 05:50 UTCJul 6, 06:10 UTC20m
2026-07-05 QTR41U MXP → DOH Jul 5, 22:10 UTCJul 6, 03:15 UTC5h 5m
2026-07-05 QTR93C DOH → MXP Jul 5, 13:05 UTCJul 5, 18:50 UTC5h 45m
2026-07-05 QTR1151 - Jul 5, 08:10 UTCJul 5, 08:45 UTC35m
2026-07-05 QTR1150 - Jul 5, 05:40 UTCJul 5, 06:05 UTC25m

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

Mode-S 06A109 frequently asked

What is Mode-S code 06A109?
06A109 is an ICAO 24-bit transponder address. Allocated to Qatar. Assigned to A7-ALU.
Where is Mode-S 06A109 registered?
Mode-S code 06A109 is allocated to Qatar (QA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 06A109 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 06A109, octal 01520411, decimal 434,441.
What flights does 06A109 operate?
Mode-S 06A109 has broadcast 20 distinct callsigns, including QTR957, QTR956, QTR4T, QTR959, QTR958.