Apparatus

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sensors Mode-S transponder

8A01DC

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GMA · BOEING 737-800

Hex
8A01DC
Octal
42400734
Decimal
9,044,444
Country
ID
Tail
PK-GMA
Type
B738
No current signal · last broadcast Jul 26, 13:55 UTC
Flights observed
357
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 13:55 UTC

Last known position

Most recent position reported by Mode-S 8A01DC.

Country allocation

The ICAO 24-bit address 8A01DC 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
GIA157 - 9 2026-07-16
GIA127 - 9 2026-07-03
GIA121 Garuda Indonesia 9 2026-07-07
GIA860 - 8 2026-07-12
GIA187 - 8 2026-06-23
GIA863 - 7 2026-07-13
GIA8320 Garuda Indonesia 6 2026-06-19
GIA683 - 6 2026-07-13
GIA126 - 6 2026-07-03
GIA839 - 5 2026-07-15
GIA682 - 5 2026-07-03
GIA430 - 5 2026-06-28
GIA326 Garuda Indonesia 5 2026-07-26
GIA246 - 5 2026-07-02
GIA155 Garuda Indonesia 5 2026-07-25
GIA898 Garuda Indonesia 4 2026-04-17
GIA652 Garuda Indonesia 4 2026-07-19
GIA646 Garuda Indonesia 4 2026-05-23
GIA612 - 4 2026-07-14
GIA453 Garuda Indonesia 4 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GIA424 CGK → DPS Jul 26, 13:10 UTCJul 26, 13:55 UTC45m
2026-07-26 GIA326 CGK → SUB Jul 26, 08:05 UTCJul 26, 11:20 UTC3h 15m
2026-07-26 GIA137 PGK → CGK Jul 26, 06:15 UTCJul 26, 06:30 UTC15m
2026-07-26 GIA551 - Jul 26, 01:20 UTCJul 26, 01:35 UTC15m
2026-07-25 GIA155 BTH → CGK Jul 25, 06:35 UTCJul 25, 06:50 UTC15m
2026-07-25 GIA152 CGK → BTH Jul 25, 02:55 UTCJul 25, 05:50 UTC2h 55m
2026-07-24 GIA622 CGK → PLW Jul 24, 19:30 UTCJul 24, 19:50 UTC20m
2026-07-24 GIA575 BPN → CGK Jul 24, 13:15 UTCJul 24, 13:30 UTC15m
2026-07-24 GIA155 BTH → CGK Jul 24, 06:35 UTCJul 24, 06:50 UTC15m
2026-07-24 GIA155 BTH → CGK Jul 24, 05:40 UTCJul 24, 05:55 UTC15m
2026-07-24 GIA152 CGK → BTH Jul 24, 02:55 UTCJul 24, 03:55 UTC1h 0m
2026-07-23 GIA453 LBJ → CGK Jul 23, 11:10 UTCJul 23, 11:25 UTC15m
2026-07-23 GIA163 PDG → CGK Jul 23, 00:40 UTCJul 23, 03:10 UTC2h 30m
2026-07-22 GIA160 CGK → PDG Jul 22, 23:50 UTCJul 23, 00:00 UTC10m
2026-07-21 GIA644 CGK → GTO Jul 21, 22:10 UTCJul 21, 22:35 UTC25m
2026-07-21 GIA417 DPS → CGK Jul 21, 12:25 UTCJul 21, 12:35 UTC10m
2026-07-21 GIA410 CGK → DPS Jul 21, 07:50 UTCJul 21, 08:15 UTC25m
2026-07-21 GIA137 - Jul 21, 06:10 UTCJul 21, 06:25 UTC15m
2026-07-21 GIA617 UPG → CGK Jul 21, 01:05 UTCJul 21, 01:20 UTC15m
2026-07-20 GIA616 - Jul 20, 10:05 UTCJul 20, 10:30 UTC25m
2026-07-20 GIA653 DPS → CGK Jul 20, 08:15 UTCJul 20, 08:30 UTC15m
2026-07-19 GIA652 CGK → DPS Jul 19, 14:35 UTCJul 19, 15:15 UTC40m
2026-07-19 GIA453 LBJ → CGK Jul 19, 12:20 UTCJul 19, 12:35 UTC15m
2026-07-19 GIA452 - Jul 19, 06:50 UTCJul 19, 07:10 UTC20m
2026-07-19 GIA225 - Jul 19, 04:35 UTCJul 19, 04:45 UTC10m
2026-07-19 GIA222 - Jul 19, 02:05 UTCJul 19, 02:30 UTC25m
2026-07-19 GIA401 DPS → CGK Jul 19, 00:30 UTCJul 19, 00:45 UTC15m
2026-07-18 GIA424 CGK → DPS Jul 18, 12:50 UTCJul 18, 13:15 UTC25m
2026-07-18 GIA315 - Jul 18, 11:00 UTCJul 18, 11:10 UTC10m
2026-07-18 GIA326 - Jul 18, 07:50 UTCJul 18, 08:30 UTC40m
2026-07-18 GIA457 KOE → CGK Jul 18, 06:15 UTCJul 18, 06:25 UTC10m
2026-07-18 GIA456 - Jul 18, 00:04 UTCJul 18, 00:25 UTC20m
2026-07-17 GIA315 - Jul 17, 11:04 UTCJul 17, 11:20 UTC15m
2026-07-17 GIA326 - Jul 17, 08:00 UTCJul 17, 08:25 UTC25m
2026-07-17 GIA567 - Jul 17, 06:25 UTCJul 17, 06:35 UTC10m
2026-07-16 GIA157 - Jul 16, 12:20 UTCJul 16, 12:30 UTC10m
2026-07-16 GIA154 - Jul 16, 08:40 UTCJul 16, 09:45 UTC1h 5m
2026-07-16 GIA141 - Jul 16, 06:40 UTCJul 16, 06:55 UTC15m
2026-07-16 GIA141 - Jul 16, 00:50 UTCJul 16, 06:05 UTC5h 15m
2026-07-15 GIA839 - Jul 15, 15:10 UTCJul 15, 15:20 UTC10m
2026-07-15 GIA839 - Jul 15, 14:00 UTCJul 15, 14:30 UTC30m
2026-07-15 GIA838 - Jul 15, 10:55 UTCJul 15, 12:10 UTC1h 15m
2026-07-15 GIA833 - Jul 15, 09:15 UTCJul 15, 09:35 UTC20m
2026-07-15 GIA832 - Jul 15, 05:10 UTCJul 15, 05:20 UTC10m
2026-07-15 GIA825 - Jul 15, 03:20 UTCJul 15, 03:40 UTC20m
2026-07-15 - - Jul 15, 02:10 UTCJul 15, 02:20 UTC10m
2026-07-15 GIA824 - Jul 15, 00:10 UTCJul 15, 00:20 UTC10m
2026-07-14 GIA824 - Jul 14, 23:00 UTCJul 14, 23:10 UTC10m
2026-07-14 GIA615 - Jul 14, 13:55 UTCJul 14, 14:05 UTC10m
2026-07-14 GIA612 - Jul 14, 08:55 UTCJul 14, 09:20 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 PK-GMA page for operator, model, and routing details .

Mode-S 8A01DC frequently asked

What is Mode-S code 8A01DC?
8A01DC is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GMA.
Where is Mode-S 8A01DC registered?
Mode-S code 8A01DC is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A01DC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 13:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A01DC, octal 42400734, decimal 9,044,444.
What flights does 8A01DC operate?
Mode-S 8A01DC has broadcast 20 distinct callsigns, including GIA157, GIA127, GIA121, GIA860, GIA187.