Apparatus

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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 1h ago
Flights observed
127
Distinct callsigns
20
Country
ID
Last broadcast
1h ago

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
BTK6898 Batik Air 4 2026-04-16
BTK6288 Batik Air 4 2026-05-28
BTK7631 Batik Air 3 2026-04-15
BTK7630 Batik Air 3 2026-04-15
BTK7147 Batik Air 3 2026-05-01
BTK6899 Batik Air 3 2026-04-17
BTK6815 Batik Air 3 2026-05-23
BTK6814 Batik Air 3 2026-05-23
BTK6807 Batik Air 3 2026-05-24
BTK6656 Batik Air 3 2026-05-17
BTK6576 Batik Air 3 2026-05-28
BTK6350 Batik Air 3 2026-05-30
BTK6345 Batik Air 3 2026-05-28
BTK7797 Batik Air 2 2026-05-22
BTK7517 Batik Air 2 2026-04-27
BTK7146 Batik Air 2 2026-05-01
BTK7109 Batik Air 2 2026-05-21
BTK7108 Batik Air 2 2026-05-21
BTK6886 Batik Air 2 2026-05-12
BTK6885 Batik Air 2 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 BTK6350 CGK → SRG May 30, 03:15 UTCMay 30, 03:45 UTC30m
2026-05-30 BTK6863 BTH → CGK May 30, 00:10 UTCMay 30, 01:25 UTC1h 15m
2026-05-29 BTK6862 CGK → BTH May 29, 13:00 UTCMay 29, 13:55 UTC55m
2026-05-28 BTK6288 CGK → UPG May 28, 17:20 UTCMay 29, 11:50 UTC18h 30m
2026-05-28 BTK6575 SUB → CGK May 28, 12:55 UTCMay 28, 13:25 UTC30m
2026-05-28 BTK6576 CGK → SUB May 28, 10:20 UTCMay 28, 11:00 UTC40m
2026-05-28 BTK6345 YIA → CGK May 28, 08:05 UTCMay 28, 09:00 UTC55m
2026-05-28 BTK6344 CGK → YIA May 28, 06:15 UTCMay 28, 06:40 UTC25m
2026-05-27 BTK6242 CGK → GTO May 27, 21:00 UTCMay 27, 21:15 UTC15m
2026-05-27 BTK6269 UPG → CGK May 27, 13:50 UTCMay 27, 14:15 UTC25m
2026-05-25 BTK6288 CGK → UPG May 25, 17:30 UTCMay 25, 18:05 UTC35m
2026-05-25 BTK6345 YIA → CGK May 25, 11:30 UTCMay 25, 11:55 UTC25m
2026-05-25 BTK6345 YIA → CGK May 25, 06:20 UTCMay 25, 09:50 UTC3h 30m
2026-05-24 BTK6807 DJB → CGK May 24, 23:20 UTCMay 25, 03:45 UTC4h 25m
2026-05-24 BTK6806 CGK → DJB May 24, 10:50 UTCMay 24, 11:30 UTC40m
2026-05-24 BTK6564 CGK → MLG May 24, 06:05 UTCMay 24, 06:45 UTC40m
2026-05-24 BTK6805 DJB → CGK May 24, 04:15 UTCMay 24, 05:05 UTC50m
2026-05-24 BTK6804 CGK → DJB May 24, 02:10 UTCMay 24, 02:25 UTC15m
2026-05-24 BTK7369 SRG → CGK May 24, 00:40 UTCMay 24, 01:05 UTC25m
2026-05-23 BTK6362 CGK → SRG May 23, 12:45 UTCMay 23, 13:10 UTC25m
2026-05-23 BTK6815 BKS → CGK May 23, 10:25 UTCMay 23, 10:35 UTC10m
2026-05-23 BTK6814 CGK → BKS May 23, 07:35 UTCMay 23, 08:00 UTC25m
2026-05-22 BTK7797 CGK → SOQ May 22, 17:40 UTCMay 23, 06:10 UTC12h 29m
2026-05-22 BTK6815 BKS → CGK May 22, 09:55 UTCMay 22, 10:05 UTC10m
2026-05-22 BTK6814 CGK → BKS May 22, 07:10 UTCMay 22, 07:30 UTC20m
2026-05-22 BTK6566 CGK → MLG May 22, 01:40 UTCMay 22, 04:20 UTC2h 40m
2026-05-21 BTK6807 DJB → CGK May 21, 23:55 UTCMay 22, 00:05 UTC10m
2026-05-21 BTK6807 DJB → CGK May 21, 23:10 UTCMay 21, 23:25 UTC15m
2026-05-21 BTK6806 CGK → DJB May 21, 10:35 UTCMay 21, 11:20 UTC45m
2026-05-21 BTK7108 PDG → CGK May 21, 08:45 UTCMay 21, 09:00 UTC15m
2026-05-21 BTK7108 PDG → CGK May 21, 07:40 UTCMay 21, 08:10 UTC30m
2026-05-21 BTK7109 CGK → PDG May 21, 06:05 UTCMay 21, 06:20 UTC15m
2026-05-21 BTK7109 CGK → PDG May 21, 05:15 UTCMay 21, 05:30 UTC15m
2026-05-21 BTK6243 GTO → CGK May 21, 03:00 UTCMay 21, 03:25 UTC25m
2026-05-20 BTK6242 CGK → GTO May 20, 21:15 UTCMay 20, 21:25 UTC10m
2026-05-20 BTK6815 BKS → CGK May 20, 09:25 UTCMay 20, 09:45 UTC20m
2026-05-20 BTK6814 CGK → BKS May 20, 07:05 UTCMay 20, 07:20 UTC15m
2026-05-20 BTK6584 CGK → SUB May 20, 01:25 UTCMay 20, 02:00 UTC35m
2026-05-19 BTK6819 BKS → CGK May 19, 23:45 UTCMay 20, 00:05 UTC20m
2026-05-19 BTK6818 CGK → BKS May 19, 08:35 UTCMay 19, 09:00 UTC25m
2026-05-18 BTK7797 CGK → SOQ May 18, 17:40 UTCMay 19, 05:55 UTC12h 14m
2026-05-18 BTK6293 UPG → CGK May 18, 12:45 UTCMay 18, 13:00 UTC15m
2026-05-17 BTK6288 CGK → UPG May 17, 17:15 UTCMay 17, 17:50 UTC35m
2026-05-17 BTK6352 CGK → SRG May 17, 10:25 UTCMay 17, 10:55 UTC30m
2026-05-17 BTK6656 CGK → LOP May 17, 04:30 UTCMay 17, 05:15 UTC45m
2026-05-17 BTK6431 BEJ → CGK May 17, 03:00 UTCMay 17, 03:10 UTC10m
2026-05-16 BTK6430 CGK → BEJ May 16, 22:00 UTCMay 16, 22:15 UTC15m
2026-05-14 BTK6296 CGK → UPG May 14, 10:10 UTCMay 14, 10:20 UTC10m
2026-05-14 BTK6656 CGK → LOP May 14, 04:30 UTCMay 14, 05:15 UTC45m
2026-05-13 BTK6576 CGK → SUB May 13, 10:40 UTCMay 13, 11:20 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-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 1h ago.
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 BTK6898, BTK6288, BTK7631, BTK7630, BTK7147.