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sensors Mode-S transponder

8A01DD

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GMC · BOEING 737-800

Hex
8A01DD
Octal
42400735
Decimal
9,044,445
Country
ID
Tail
PK-GMC
Type
B738
No current signal · last broadcast Jul 26, 14:20 UTC
Flights observed
389
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 14:20 UTC

Last known position

Most recent position reported by Mode-S 8A01DD.

Country allocation

The ICAO 24-bit address 8A01DD 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
GIA179 Garuda Indonesia 8 2026-07-07
GIA175 - 8 2026-07-09
GIA126 Garuda Indonesia 8 2026-07-24
GIA176 - 7 2026-07-07
GIA172 - 7 2026-07-09
GIA127 Garuda Indonesia 7 2026-07-24
GIA245 Garuda Indonesia 6 2026-07-24
GIA228 - 6 2026-06-21
GIA221 - 6 2026-06-21
GIA867 Garuda Indonesia 5 2026-07-26
GIA567 - 5 2026-07-16
GIA402 - 5 2026-06-21
GIA312 - 5 2026-06-27
GIA242 Garuda Indonesia 5 2026-07-24
GIA205 Garuda Indonesia 5 2026-07-19
GIA165 - 5 2026-06-20
GIA155 Garuda Indonesia 5 2026-06-11
GIA121 Garuda Indonesia 5 2026-06-30
GIA866 Garuda Indonesia 4 2026-07-26
GIA821 - 4 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GIA822 CGK → SIN Jul 26, 13:00 UTCJul 26, 14:20 UTC1h 20m
2026-07-26 GIA867 BKK → CGK Jul 26, 10:45 UTCJul 26, 11:00 UTC15m
2026-07-26 GIA867 BKK → CGK Jul 26, 07:50 UTCJul 26, 09:55 UTC2h 5m
2026-07-26 GIA866 CGK → BKK Jul 26, 03:05 UTCJul 26, 06:15 UTC3h 10m
2026-07-26 GIA623 PLW → CGK Jul 26, 01:30 UTCJul 26, 01:45 UTC15m
2026-07-25 GIA622 CGK → PLW Jul 25, 19:30 UTCJul 25, 19:55 UTC25m
2026-07-25 GIA575 BPN → CGK Jul 25, 12:55 UTCJul 25, 13:10 UTC15m
2026-07-25 GIA572 CGK → BPN Jul 25, 08:20 UTCJul 25, 08:30 UTC10m
2026-07-25 GIA406 CGK → DPS Jul 25, 01:40 UTCJul 25, 06:45 UTC5h 5m
2026-07-24 GIA576 CGK → BPN Jul 24, 11:30 UTCJul 24, 11:40 UTC10m
2026-07-24 GIA245 SRG → CGK Jul 24, 09:05 UTCJul 24, 09:40 UTC35m
2026-07-24 GIA242 CGK → SRG Jul 24, 07:05 UTCJul 24, 07:30 UTC25m
2026-07-24 GIA127 DJB → CGK Jul 24, 04:45 UTCJul 24, 05:45 UTC1h 0m
2026-07-24 GIA126 CGK → DJB Jul 24, 03:10 UTCJul 24, 03:30 UTC20m
2026-07-24 GIA126 CGK → DJB Jul 24, 02:30 UTCJul 24, 02:40 UTC10m
2026-07-24 GIA231 SRG → CGK Jul 24, 00:35 UTCJul 24, 01:05 UTC30m
2026-07-23 GIA246 CGK → SRG Jul 23, 10:50 UTCJul 23, 11:15 UTC25m
2026-07-23 GIA177 PKU → CGK Jul 23, 08:50 UTCJul 23, 09:10 UTC20m
2026-07-23 GIA174 CGK → PKU Jul 23, 05:00 UTCJul 23, 06:05 UTC1h 5m
2026-07-23 GIA683 SOQ → CGK Jul 23, 02:50 UTCJul 23, 03:00 UTC10m
2026-07-22 GIA682 CGK → SOQ Jul 22, 17:25 UTCJul 22, 17:50 UTC25m
2026-07-22 GIA325 SUB → CGK Jul 22, 12:55 UTCJul 22, 13:30 UTC35m
2026-07-22 GIA184 CGK → KNO Jul 22, 02:45 UTCJul 22, 04:15 UTC1h 30m
2026-07-22 GIA207 YIA → CGK Jul 22, 00:00 UTCJul 22, 00:55 UTC55m
2026-07-21 GIA206 CGK → YIA Jul 21, 12:35 UTCJul 21, 13:00 UTC25m
2026-07-21 GIA213 - Jul 21, 08:05 UTCJul 21, 10:55 UTC2h 50m
2026-07-21 GIA109 - Jul 21, 06:10 UTCJul 21, 06:25 UTC15m
2026-07-21 GIA104 - Jul 21, 03:35 UTCJul 21, 03:50 UTC15m
2026-07-21 GIA623 PLW → CGK Jul 21, 01:35 UTCJul 21, 01:55 UTC20m
2026-07-20 GIA622 - Jul 20, 19:55 UTCJul 20, 20:25 UTC30m
2026-07-20 GIA575 BPN → CGK Jul 20, 13:00 UTCJul 20, 13:10 UTC10m
2026-07-20 GIA149 PDG → CGK Jul 20, 06:45 UTCJul 20, 07:05 UTC20m
2026-07-20 GIA148 - Jul 20, 03:50 UTCJul 20, 04:05 UTC15m
2026-07-20 GIA148 - Jul 20, 03:00 UTCJul 20, 03:15 UTC15m
2026-07-20 GIA623 PLW → CGK Jul 20, 01:20 UTCJul 20, 01:35 UTC15m
2026-07-19 GIA622 - Jul 19, 19:40 UTCJul 19, 20:05 UTC25m
2026-07-19 GIA839 - Jul 19, 15:05 UTCJul 19, 15:20 UTC15m
2026-07-19 GIA839 - Jul 19, 14:00 UTCJul 19, 14:30 UTC30m
2026-07-19 GIA838 - Jul 19, 10:55 UTCJul 19, 12:15 UTC1h 20m
2026-07-19 GIA75 TKG → CGK Jul 19, 07:30 UTCJul 19, 07:55 UTC25m
2026-07-19 GIA74 CGK → TKG Jul 19, 05:50 UTCJul 19, 06:10 UTC20m
2026-07-19 GIA205 YIA → CGK Jul 19, 03:15 UTCJul 19, 04:05 UTC50m
2026-07-19 GIA204 - Jul 19, 01:05 UTCJul 19, 01:30 UTC25m
2026-07-18 GIA313 - Jul 18, 06:50 UTCJul 18, 12:25 UTC5h 35m
2026-07-18 GIA304 CGK → SUB Jul 18, 00:04 UTCJul 18, 05:25 UTC5h 21m
2026-07-17 GIA615 - Jul 17, 13:50 UTCJul 17, 14:00 UTC10m
2026-07-17 GIA612 - Jul 17, 08:54 UTCJul 17, 09:20 UTC25m
2026-07-17 GIA409 - Jul 17, 07:20 UTCJul 17, 07:30 UTC10m
2026-07-17 GIA404 - Jul 17, 03:10 UTCJul 17, 03:55 UTC45m
2026-07-17 GIA623 - Jul 17, 01:20 UTCJul 17, 01:35 UTC15m

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

Mode-S 8A01DD frequently asked

What is Mode-S code 8A01DD?
8A01DD is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GMC.
Where is Mode-S 8A01DD registered?
Mode-S code 8A01DD is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A01DD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A01DD, octal 42400735, decimal 9,044,445.
What flights does 8A01DD operate?
Mode-S 8A01DD has broadcast 20 distinct callsigns, including GIA179, GIA175, GIA126, GIA176, GIA172.