Apparatus

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sensors Mode-S transponder

06A1BF

ICAO 24-bit transponder address · allocated to Qatar

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

Hex
06A1BF
Octal
01520677
Decimal
434,623
Country
QA
Tail
A7-BEI
Type
B77W
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
152
Distinct callsigns
20
Country
QA
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S 06A1BF.

Country allocation

The ICAO 24-bit address 06A1BF 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
QTR1V Qatar Airways 8 2026-06-04
QTR871 Qatar Airways 7 2026-06-13
QTR837 Qatar Airways 5 2026-04-26
QTR33W Qatar Airways 5 2026-06-04
QTR20R - 5 2026-07-19
QTR933 Qatar Airways 4 2026-05-16
QTR932 Qatar Airways 4 2026-05-15
QTR90C Qatar Airways 4 2026-06-14
QTR836 Qatar Airways 4 2026-04-26
QTR54E Qatar Airways 4 2026-06-11
QTR1J Qatar Airways 4 2026-04-17
QTR16M Qatar Airways 4 2026-07-26
QTR1191 Qatar Airways 4 2026-07-25
QTR18F Qatar Airways 3 2026-07-22
QTR8M Qatar Airways 2 2026-07-22
QTR898 Qatar Airways 2 2026-07-26
QTR875 Qatar Airways 2 2026-05-10
QTR870 Qatar Airways 2 2026-04-28
QTR859 Qatar Airways 2 2026-04-15
QTR858 Qatar Airways 2 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QTR16M AMS → DOH Jul 26, 12:35 UTCJul 26, 20:20 UTC7h 45m
2026-07-26 QTR898 DOH → PEK Jul 26, 06:30 UTCJul 26, 06:55 UTC26m
2026-07-25 QTR1191 JED → DOH Jul 25, 13:20 UTCJul 25, 14:05 UTC45m
2026-07-25 QTR1190 DOH → JED Jul 25, 06:50 UTCJul 25, 07:15 UTC25m
2026-07-24 QTR16M AMS → DOH Jul 24, 12:20 UTCJul 25, 02:15 UTC13h 55m
2026-07-24 QTR898 DOH → PEK Jul 24, 06:45 UTCJul 24, 07:40 UTC55m
2026-07-23 QTR65R SEA → DOH Jul 23, 01:00 UTCJul 23, 13:30 UTC12h 30m
2026-07-22 QTR18F BUD → DOH Jul 22, 11:10 UTCJul 22, 20:20 UTC9h 10m
2026-07-22 QTR8M DOH → CMB Jul 22, 02:35 UTCJul 22, 02:50 UTC15m
2026-07-21 QTR8M DOH → CMB Jul 21, 13:05 UTCJul 21, 23:05 UTC10h 0m
2026-07-20 QTR19E DOH → MEL Jul 20, 18:20 UTCJul 21, 07:00 UTC12h 40m
2026-07-20 QTR17E - Jul 20, 03:00 UTCJul 20, 15:30 UTC12h 30m
2026-07-19 QTR20R - Jul 19, 08:15 UTCJul 19, 19:25 UTC11h 10m
2026-07-18 QTR20R - Jul 18, 21:50 UTCJul 19, 19:25 UTC21h 35m
2026-07-18 QTR20R - Jul 18, 19:50 UTCJul 19, 19:25 UTC23h 35m
2026-07-18 QTR20R - Jul 18, 18:45 UTCJul 19, 17:45 UTC23h 0m
2026-07-17 QTR6W ORD → DOH Jul 17, 01:20 UTCJul 17, 13:55 UTC12h 35m
2026-07-16 QTR18F - Jul 16, 06:05 UTCJul 16, 19:50 UTC13h 45m
2026-07-15 QTR27R - Jul 15, 11:15 UTCJul 16, 00:55 UTC13h 40m
2026-07-14 QTR40X - Jul 14, 17:35 UTCJul 15, 07:20 UTC13h 44m
2026-07-13 QTR68T - Jul 13, 23:55 UTCJul 14, 12:00 UTC12h 5m
2026-07-13 QTR21X - Jul 13, 05:50 UTCJul 13, 20:25 UTC14h 35m
2026-07-12 QTR807 - Jul 12, 13:55 UTCJul 13, 00:05 UTC10h 10m
2026-07-12 QTR806 - Jul 12, 07:01 UTCJul 12, 10:05 UTC3h 5m
2026-07-11 VOZ001 - Jul 11, 04:55 UTCJul 11, 19:10 UTC14h 15m
2026-07-10 VOZ002 - Jul 10, 07:15 UTCJul 10, 20:25 UTC13h 10m
2026-07-09 QTR30J - Jul 9, 15:45 UTCJul 10, 03:55 UTC12h 10m
2026-07-09 QTR72P DOH → DFW Jul 9, 01:25 UTCJul 9, 12:50 UTC11h 25m
2026-07-08 QTR809 - Jul 8, 08:40 UTCJul 8, 18:55 UTC10h 15m
2026-07-07 QTR808 - Jul 7, 17:50 UTCJul 8, 03:50 UTC10h 0m
2026-07-04 QTR27R - Jul 4, 11:10 UTCJul 5, 01:20 UTC14h 10m
2026-07-04 QTR40X - Jul 4, 06:25 UTCJul 4, 07:00 UTC35m
2026-07-03 QTR56L - Jul 3, 11:15 UTCJul 3, 14:40 UTC3h 25m
2026-07-03 QTR36P - Jul 3, 05:00 UTCJul 3, 07:35 UTC2h 35m
2026-07-02 QTR16M - Jul 2, 12:25 UTCJul 3, 02:40 UTC14h 15m
2026-07-01 QTR74V - Jul 1, 17:55 UTCJul 2, 06:55 UTC13h 0m
2026-07-01 QTR120 - Jul 1, 08:50 UTCJul 1, 15:10 UTC6h 20m
2026-07-01 QTR119 - Jul 1, 02:00 UTCJul 1, 06:30 UTC4h 30m
2026-06-23 QTR77A IAD → DOH Jun 23, 01:20 UTCJun 23, 13:59 UTC12h 40m
2026-06-22 QTR18F - Jun 22, 05:54 UTCJun 22, 20:19 UTC14h 25m
2026-06-21 QTR16M - Jun 21, 12:35 UTCJun 22, 02:25 UTC13h 50m
2026-06-20 QTR74V - Jun 20, 21:19 UTCJun 21, 07:34 UTC10h 15m
2026-06-20 QTR17E - Jun 20, 02:49 UTCJun 20, 12:19 UTC9h 30m
2026-06-19 QTR20R DOH → JFK Jun 19, 07:59 UTCJun 19, 19:59 UTC12h 0m
2026-06-19 QTR3X - Jun 19, 00:45 UTCJun 19, 01:04 UTC20m
2026-06-18 QTR3X - Jun 18, 12:35 UTCJun 18, 21:50 UTC9h 15m
2026-06-18 QTR915 - Jun 18, 05:35 UTCJun 18, 10:15 UTC4h 40m
2026-06-17 QTR914 ADL → AKL Jun 17, 07:35 UTCJun 17, 11:20 UTC3h 45m
2026-06-16 QTR55Y - Jun 16, 20:35 UTCJun 17, 05:35 UTC9h 0m
2026-06-16 QTR1241 - Jun 16, 06:50 UTCJun 16, 11:05 UTC4h 15m

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

Mode-S 06A1BF frequently asked

What is Mode-S code 06A1BF?
06A1BF is an ICAO 24-bit transponder address. Allocated to Qatar. Assigned to A7-BEI.
Where is Mode-S 06A1BF registered?
Mode-S code 06A1BF is allocated to Qatar (QA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 06A1BF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 06A1BF, octal 01520677, decimal 434,623.
What flights does 06A1BF operate?
Mode-S 06A1BF has broadcast 20 distinct callsigns, including QTR1V, QTR871, QTR837, QTR33W, QTR20R.