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sensors Mode-S transponder

8A09A1

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-BKR · AIRBUS A-320

Hex
8A09A1
Octal
42404641
Decimal
9,046,433
Country
ID
Tail
PK-BKR
Type
A320
No current signal · last broadcast Jul 26, 12:35 UTC
Flights observed
305
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 12:35 UTC

Last known position

Most recent position reported by Mode-S 8A09A1.

Country allocation

The ICAO 24-bit address 8A09A1 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
BTK7501 Batik Air 7 2026-07-26
BTK7521 Batik Air 6 2026-07-25
BTK7517 Batik Air 6 2026-07-26
BTK7513 Batik Air 6 2026-07-20
BTK7309 Batik Air 6 2026-07-25
BTK6865 Batik Air 6 2026-07-24
BTK7630 - 5 2026-06-17
BTK7515 Batik Air 5 2026-07-25
BTK7051 Batik Air 5 2026-07-19
BTK6288 Batik Air 5 2026-06-06
BTK7631 - 4 2026-06-17
BTK7503 - 4 2026-07-19
BTK7108 - 4 2026-06-19
BTK7055 Batik Air 4 2026-07-26
BTK6899 - 4 2026-06-23
BTK6898 Batik Air 4 2026-04-16
BTK6885 Batik Air 4 2026-06-01
BTK6864 Batik Air 4 2026-07-24
BTK6807 - 4 2026-06-18
BTK6350 - 4 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BTK7055 HLP → PLM Jul 26, 12:15 UTCJul 26, 12:35 UTC20m
2026-07-26 BTK7512 SUB → HLP Jul 26, 09:35 UTCJul 26, 10:05 UTC30m
2026-07-26 BTK7501 HLP → SUB Jul 26, 06:55 UTCJul 26, 07:35 UTC40m
2026-07-26 BTK7517 HLP → SUB Jul 26, 02:45 UTCJul 26, 06:05 UTC3h 20m
2026-07-26 BTK7510 SUB → HLP Jul 26, 01:20 UTCJul 26, 01:30 UTC10m
2026-07-25 BTK7521 HLP → SUB Jul 25, 14:05 UTCJul 25, 14:40 UTC35m
2026-07-25 BTK7515 HLP → SUB Jul 25, 09:55 UTCJul 25, 13:10 UTC3h 15m
2026-07-25 BTK7309 HLP → DPS Jul 25, 04:10 UTCJul 25, 08:50 UTC4h 40m
2026-07-24 BTK7508 SUB → HLP Jul 24, 22:30 UTCJul 24, 22:50 UTC20m
2026-07-24 BTK6578 CGK → SUB Jul 24, 09:20 UTCJul 24, 10:00 UTC40m
2026-07-24 BTK6865 BTH → CGK Jul 24, 07:00 UTCJul 24, 07:55 UTC55m
2026-07-24 BTK6864 CGK → BTH Jul 24, 03:50 UTCJul 24, 05:00 UTC1h 10m
2026-07-22 BTK6371 YIA → CGK Jul 22, 14:05 UTCJul 22, 14:40 UTC35m
2026-07-22 BTK6374 CGK → YIA Jul 22, 11:20 UTCJul 22, 12:15 UTC55m
2026-07-21 BTK7515 HLP → SUB Jul 21, 09:10 UTCJul 21, 09:40 UTC30m
2026-07-21 BTK7308 DPS → HLP Jul 21, 07:55 UTCJul 21, 08:05 UTC10m
2026-07-21 BTK7309 HLP → DPS Jul 21, 04:00 UTCJul 21, 04:35 UTC35m
2026-07-20 BTK7309 HLP → DPS Jul 20, 06:55 UTCJul 21, 01:35 UTC18h 40m
2026-07-20 BTK7513 HLP → SUB Jul 20, 02:50 UTCJul 20, 06:00 UTC3h 10m
2026-07-19 BTK7511 - Jul 19, 22:35 UTCJul 19, 23:15 UTC40m
2026-07-19 BTK7503 - Jul 19, 09:55 UTCJul 19, 12:55 UTC3h 0m
2026-07-19 BTK7052 PLM → HLP Jul 19, 08:45 UTCJul 19, 08:55 UTC10m
2026-07-19 BTK7051 HLP → PLM Jul 19, 06:10 UTCJul 19, 06:35 UTC25m
2026-07-19 BTK7516 - Jul 19, 04:45 UTCJul 19, 04:55 UTC10m
2026-07-19 BTK7513 - Jul 19, 02:05 UTCJul 19, 02:45 UTC40m
2026-07-18 BTK7514 SUB → HLP Jul 18, 11:50 UTCJul 18, 12:15 UTC25m
2026-07-17 BTK6578 - Jul 17, 08:49 UTCJul 17, 09:30 UTC40m
2026-07-17 BTK6865 - Jul 17, 07:05 UTCJul 17, 07:25 UTC20m
2026-07-17 BTK6865 - Jul 17, 06:05 UTCJul 17, 06:29 UTC25m
2026-07-17 BTK6864 - Jul 17, 03:39 UTCJul 17, 04:35 UTC55m
2026-07-17 BTK6723 - Jul 17, 02:15 UTCJul 17, 02:30 UTC15m
2026-07-16 BTK6724 - Jul 16, 20:35 UTCJul 16, 21:00 UTC25m
2026-07-16 BTK6371 - Jul 16, 13:25 UTCJul 16, 14:05 UTC40m
2026-07-16 BTK6374 - Jul 16, 11:30 UTCJul 16, 11:50 UTC20m
2026-07-16 BTK6205 - Jul 16, 10:00 UTCJul 16, 10:15 UTC15m
2026-07-16 BTK7010 - Jul 16, 04:00 UTCJul 16, 05:50 UTC1h 50m
2026-07-15 BTK6884 - Jul 15, 12:15 UTCJul 15, 13:40 UTC1h 25m
2026-07-15 BTK7501 - Jul 15, 06:55 UTCJul 15, 10:50 UTC3h 55m
2026-07-15 BTK7520 - Jul 15, 05:35 UTCJul 15, 05:55 UTC20m
2026-07-15 BTK7517 - Jul 15, 02:45 UTCJul 15, 03:20 UTC35m
2026-07-14 BTK7511 - Jul 14, 22:35 UTCJul 14, 23:15 UTC39m
2026-07-14 BTK7309 - Jul 14, 04:10 UTCJul 14, 08:20 UTC4h 10m
2026-07-13 BTK7516 - Jul 13, 05:01 UTCJul 13, 05:10 UTC10m
2026-07-13 BTK7513 - Jul 13, 02:05 UTCJul 13, 02:35 UTC30m
2026-07-12 BTK7055 - Jul 12, 12:20 UTCJul 12, 12:40 UTC20m
2026-07-12 BTK7512 - Jul 12, 09:40 UTCJul 12, 09:50 UTC10m
2026-07-12 BTK7501 - Jul 12, 06:45 UTCJul 12, 07:20 UTC35m
2026-07-12 BTK7517 - Jul 12, 02:35 UTCJul 12, 05:55 UTC3h 20m
2026-07-11 BTK7521 - Jul 11, 13:20 UTCJul 12, 01:25 UTC12h 5m
2026-07-11 BTK7515 - Jul 11, 09:10 UTCJul 11, 12:10 UTC3h 0m

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

Mode-S 8A09A1 frequently asked

What is Mode-S code 8A09A1?
8A09A1 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-BKR.
Where is Mode-S 8A09A1 registered?
Mode-S code 8A09A1 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A09A1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A09A1, octal 42404641, decimal 9,046,433.
What flights does 8A09A1 operate?
Mode-S 8A09A1 has broadcast 20 distinct callsigns, including BTK7501, BTK7521, BTK7517, BTK7513, BTK7309.