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sensors Mode-S transponder

8A091B

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-BKG · AIRBUS A-320

Hex
8A091B
Octal
42404433
Decimal
9,046,299
Country
ID
Tail
PK-BKG
Type
A320
Broadcasting now · callsign BTK6527 · 8,875 ft
Flights observed
361
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 20:00 UTC

Current position

8A091B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 8A091B falls within the block assigned to Indonesia (ID) by ICAO Annex 10, Volume III. Every aircraft registered in Indonesia 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
BTK6540 Batik Air 52 2026-07-26
BTK6350 Batik Air 26 2026-07-26
BTK6351 Batik Air 25 2026-07-26
BTK6541 - 22 2026-07-20
BTK6576 Batik Air 14 2026-07-26
BTK6575 Batik Air 10 2026-07-26
BTK6406 Batik Air 10 2026-07-23
BTK6821 - 7 2026-06-25
BTK6820 - 7 2026-06-25
BTK6658 Batik Air 7 2026-05-20
BTK6401 Batik Air 7 2026-07-21
BTK6339 Batik Air 7 2026-07-25
BTK6338 Batik Air 7 2026-07-25
BTK6205 - 7 2026-06-26
BTK6675 Batik Air 6 2026-06-12
BTK6572 Batik Air 5 2026-04-20
BTK6378 Batik Air 5 2026-06-13
BTK6374 - 5 2026-06-25
BTK6253 Batik Air 5 2026-04-21
BTK6865 - 4 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BTK6540 CGK → KOE Jul 26, 19:10 UTCJul 26, 20:00 UTC50m
2026-07-26 BTK6575 SUB → CGK Jul 26, 15:00 UTCJul 26, 15:30 UTC30m
2026-07-26 BTK6576 CGK → SUB Jul 26, 12:15 UTCJul 26, 12:55 UTC40m
2026-07-26 BTK6351 SRG → CGK Jul 26, 08:40 UTCJul 26, 09:15 UTC35m
2026-07-26 BTK6350 CGK → SRG Jul 26, 03:15 UTCJul 26, 03:40 UTC25m
2026-07-25 BTK6540 CGK → KOE Jul 25, 19:15 UTCJul 26, 01:55 UTC6h 40m
2026-07-25 BTK6887 KNO → CGK Jul 25, 11:35 UTCJul 25, 13:25 UTC1h 50m
2026-07-25 BTK6886 CGK → KNO Jul 25, 08:25 UTCJul 25, 10:05 UTC1h 40m
2026-07-25 BTK6339 SRG → CGK Jul 25, 05:55 UTCJul 25, 06:30 UTC35m
2026-07-25 BTK6338 CGK → SRG Jul 25, 00:10 UTCJul 25, 00:35 UTC25m
2026-07-24 BTK6814 CGK → BKS Jul 24, 07:05 UTCJul 24, 10:05 UTC3h 0m
2026-07-24 BTK6351 SRG → CGK Jul 24, 05:10 UTCJul 24, 05:40 UTC30m
2026-07-24 BTK6350 CGK → SRG Jul 24, 03:20 UTCJul 24, 03:40 UTC20m
2026-07-23 BTK6540 CGK → KOE Jul 23, 19:05 UTCJul 24, 01:50 UTC6h 45m
2026-07-23 BTK6406 CGK → SUB Jul 23, 07:05 UTCJul 23, 10:40 UTC3h 35m
2026-07-23 BTK6351 SRG → CGK Jul 23, 05:40 UTCJul 23, 05:55 UTC15m
2026-07-23 BTK6350 CGK → SRG Jul 23, 03:10 UTCJul 23, 03:25 UTC15m
2026-07-22 BTK6540 CGK → KOE Jul 22, 19:20 UTCJul 22, 20:10 UTC50m
2026-07-22 BTK6351 SRG → CGK Jul 22, 05:05 UTCJul 22, 05:25 UTC20m
2026-07-22 BTK6350 CGK → SRG Jul 22, 03:05 UTCJul 22, 03:30 UTC25m
2026-07-21 BTK6540 - Jul 21, 19:05 UTCJul 21, 19:50 UTC45m
2026-07-21 BTK6401 SUB → CGK Jul 21, 10:30 UTCJul 21, 10:45 UTC15m
2026-07-21 BTK6406 CGK → SUB Jul 21, 06:45 UTCJul 21, 07:25 UTC40m
2026-07-21 BTK6351 SRG → CGK Jul 21, 05:25 UTCJul 21, 05:40 UTC15m
2026-07-21 BTK6350 CGK → SRG Jul 21, 03:10 UTCJul 21, 03:35 UTC25m
2026-07-20 BTK6351 SRG → CGK Jul 20, 05:25 UTCJul 20, 05:35 UTC10m
2026-07-20 BTK6350 CGK → SRG Jul 20, 03:10 UTCJul 20, 03:35 UTC25m
2026-07-20 BTK6541 - Jul 20, 01:35 UTCJul 20, 01:50 UTC15m
2026-07-19 BTK6540 - Jul 19, 19:15 UTCJul 19, 20:00 UTC45m
2026-07-19 BTK6575 - Jul 19, 13:25 UTCJul 19, 13:40 UTC15m
2026-07-19 BTK6576 CGK → SUB Jul 19, 10:35 UTCJul 19, 11:15 UTC40m
2026-07-19 BTK6351 SRG → CGK Jul 19, 09:05 UTCJul 19, 09:20 UTC15m
2026-07-19 BTK6350 CGK → SRG Jul 19, 03:40 UTCJul 19, 04:05 UTC25m
2026-07-18 BTK6540 - Jul 18, 19:10 UTCJul 19, 01:45 UTC6h 35m
2026-07-18 BTK6575 - Jul 18, 12:55 UTCJul 18, 13:25 UTC30m
2026-07-18 BTK6576 - Jul 18, 10:10 UTCJul 18, 10:50 UTC40m
2026-07-18 BTK6351 SRG → CGK Jul 18, 08:30 UTCJul 18, 09:00 UTC30m
2026-07-18 BTK6350 - Jul 18, 03:05 UTCJul 18, 03:30 UTC25m
2026-07-18 BTK6541 - Jul 18, 01:39 UTCJul 18, 01:54 UTC15m
2026-07-17 BTK6540 - Jul 17, 19:20 UTCJul 17, 20:00 UTC40m
2026-07-17 BTK6351 - Jul 17, 05:20 UTCJul 17, 05:35 UTC15m
2026-07-17 BTK6350 - Jul 17, 03:14 UTCJul 17, 03:34 UTC20m
2026-07-17 BTK6541 - Jul 17, 01:39 UTCJul 17, 01:59 UTC20m
2026-07-16 BTK6540 - Jul 16, 19:20 UTCJul 16, 20:00 UTC40m
2026-07-16 BTK6281 - Jul 16, 11:50 UTCJul 16, 12:09 UTC20m
2026-07-16 BTK6431 - Jul 16, 02:50 UTCJul 16, 03:05 UTC15m
2026-07-15 BTK6430 - Jul 15, 21:55 UTCJul 15, 22:05 UTC10m
2026-07-15 BTK6293 - Jul 15, 11:55 UTCJul 15, 12:10 UTC15m
2026-07-14 BTK6288 - Jul 14, 17:25 UTCJul 14, 17:45 UTC20m
2026-07-14 BTK6401 - Jul 14, 09:55 UTCJul 14, 10:35 UTC40m

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 PK-BKG page for operator, model, and routing details .

Mode-S 8A091B frequently asked

What is Mode-S code 8A091B?
8A091B is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-BKG.
Where is Mode-S 8A091B registered?
Mode-S code 8A091B is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A091B broadcasting right now?
Yes. Mode-S 8A091B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A091B, octal 42404433, decimal 9,046,299.
What flights does 8A091B operate?
Mode-S 8A091B has broadcast 20 distinct callsigns, including BTK6540, BTK6350, BTK6351, BTK6541, BTK6576.