Apparatus

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sensors Mode-S transponder

8A03C4

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GMY · BOEING 737-800

Hex
8A03C4
Octal
42401704
Decimal
9,044,932
Country
ID
Tail
PK-GMY
Type
B738
No current signal · last broadcast 6h ago
Flights observed
120
Distinct callsigns
20
Country
ID
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 8A03C4.

Country allocation

The ICAO 24-bit address 8A03C4 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
GIA898 Garuda Indonesia 11 2026-05-24
GIA860 Garuda Indonesia 3 2026-05-24
GIA456 Garuda Indonesia 3 2026-04-29
GIA237 Garuda Indonesia 3 2026-04-29
GIA234 Garuda Indonesia 3 2026-04-29
GIA189 Garuda Indonesia 3 2026-05-26
GIA149 Garuda Indonesia 3 2026-05-08
GIA863 Garuda Indonesia 2 2026-05-23
GIA8480 - 2 2026-04-23
GIA8320 Garuda Indonesia 2 2026-05-01
GIA682 Garuda Indonesia 2 2026-05-25
GIA657 Garuda Indonesia 2 2026-04-25
GIA656 Garuda Indonesia 2 2026-04-24
GIA647 Garuda Indonesia 2 2026-05-12
GIA644 Garuda Indonesia 2 2026-05-02
GIA605 Garuda Indonesia 2 2026-05-06
GIA604 Garuda Indonesia 2 2026-05-05
GIA567 Garuda Indonesia 2 2026-05-11
GIA422 Garuda Indonesia 2 2026-05-02
GIA322 Garuda Indonesia 2 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 GIA196 CGK → KNO May 30, 13:05 UTCMay 30, 14:05 UTC1h 0m
2026-05-30 GIA213 YIA → CGK May 30, 08:05 UTCMay 30, 10:55 UTC2h 50m
2026-05-30 GIA322 CGK → SUB May 30, 02:00 UTCMay 30, 05:45 UTC3h 45m
2026-05-27 GIA121 KNO → CGK May 27, 12:10 UTCMay 27, 12:25 UTC15m
2026-05-27 GIA121 KNO → CGK May 27, 07:00 UTCMay 27, 11:35 UTC4h 35m
2026-05-27 GIA205 YIA → CGK May 27, 03:45 UTCMay 27, 03:54 UTC10m
2026-05-27 GIA204 CGK → YIA May 27, 00:55 UTCMay 27, 01:14 UTC20m
2026-05-26 GIA189 KNO → CGK May 26, 05:30 UTCMay 26, 09:35 UTC4h 5m
2026-05-25 GIA682 CGK → SOQ May 25, 17:25 UTCMay 25, 17:50 UTC25m
2026-05-24 GIA860 CGK → HKG May 24, 21:15 UTCMay 24, 21:45 UTC30m
2026-05-24 GIA860 CGK → HKG May 24, 17:10 UTCMay 24, 18:30 UTC1h 20m
2026-05-24 GIA898 CGK → CAN May 24, 01:25 UTCMay 24, 05:50 UTC4h 25m
2026-05-23 GIA863 HKG → CGK May 23, 06:10 UTCMay 23, 06:25 UTC15m
2026-05-23 GIA863 HKG → CGK May 23, 02:00 UTCMay 23, 02:15 UTC15m
2026-05-22 GIA860 CGK → HKG May 22, 17:10 UTCMay 22, 21:30 UTC4h 20m
2026-05-22 GIA898 CGK → CAN May 22, 05:35 UTCMay 22, 05:55 UTC20m
2026-05-22 GIA898 CGK → CAN May 22, 03:10 UTCMay 22, 03:40 UTC30m
2026-05-22 GIA898 CGK → CAN May 22, 01:25 UTCMay 22, 01:35 UTC10m
2026-05-21 GIA899 CAN → CGK May 21, 12:40 UTCMay 21, 12:50 UTC10m
2026-05-21 GIA898 CGK → CAN May 21, 05:40 UTCMay 21, 05:55 UTC15m
2026-05-21 GIA898 CGK → CAN May 21, 03:05 UTCMay 21, 03:50 UTC45m
2026-05-21 GIA898 CGK → CAN May 21, 01:25 UTCMay 21, 01:35 UTC10m
2026-05-20 GIA179 PKU → CGK May 20, 11:10 UTCMay 20, 11:45 UTC35m
2026-05-20 GIA176 CGK → PKU May 20, 08:30 UTCMay 20, 09:40 UTC1h 10m
2026-05-20 GIA141 BTJ → CGK May 20, 06:45 UTCMay 20, 06:55 UTC10m
2026-05-20 GIA141 BTJ → CGK May 20, 01:25 UTCMay 20, 06:10 UTC4h 46m
2026-05-19 GIA407 DPS → CGK May 19, 05:50 UTCMay 19, 06:05 UTC15m
2026-05-19 GIA402 CGK → DPS May 19, 00:20 UTCMay 19, 01:00 UTC40m
2026-05-18 GIA417 DPS → CGK May 18, 12:05 UTCMay 18, 12:20 UTC15m
2026-05-18 GIA410 CGK → DPS May 18, 07:50 UTCMay 18, 08:30 UTC40m
2026-05-17 GIA867 BKK → CGK May 17, 07:35 UTCMay 17, 09:50 UTC2h 15m
2026-05-17 GIA866 CGK → BKK May 17, 03:30 UTCMay 17, 06:15 UTC2h 45m
2026-05-15 GIA898 CGK → CAN May 15, 05:45 UTCMay 15, 06:10 UTC25m
2026-05-15 GIA898 CGK → CAN May 15, 01:25 UTCMay 15, 02:50 UTC1h 25m
2026-05-14 GIA898 CGK → CAN May 14, 05:40 UTCMay 14, 05:55 UTC15m
2026-05-14 GIA898 CGK → CAN May 14, 01:30 UTCMay 14, 02:50 UTC1h 20m
2026-05-13 - - May 13, 08:55 UTCMay 13, 09:05 UTC10m
2026-05-13 GIA312 CGK → SUB May 13, 05:30 UTCMay 13, 06:15 UTC45m
2026-05-12 GIA647 AMQ → CGK May 12, 10:15 UTCMay 12, 10:25 UTC10m
2026-05-11 GIA567 BPN → CGK May 11, 06:30 UTCMay 11, 06:40 UTC10m
2026-05-10 GIA426 CGK → DPS May 10, 11:55 UTCMay 10, 12:15 UTC20m
2026-05-10 GIA189 KNO → CGK May 10, 10:10 UTCMay 10, 10:24 UTC15m
2026-05-10 GIA189 KNO → CGK May 10, 05:40 UTCMay 10, 09:35 UTC3h 55m
2026-05-10 GIA235 SRG → CGK May 10, 03:25 UTCMay 10, 03:40 UTC15m
2026-05-10 GIA232 CGK → SRG May 10, 01:04 UTCMay 10, 01:24 UTC20m
2026-05-09 GIA325 SUB → CGK May 9, 13:00 UTCMay 9, 13:15 UTC15m
2026-05-09 GIA320 CGK → SUB May 9, 09:35 UTCMay 9, 10:10 UTC35m
2026-05-09 GIA187 KNO → CGK May 9, 08:05 UTCMay 9, 08:15 UTC10m
2026-05-09 GIA187 KNO → CGK May 9, 06:25 UTCMay 9, 07:35 UTC1h 10m
2026-05-09 GIA184 CGK → KNO May 9, 03:00 UTCMay 9, 04:35 UTC1h 35m

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

Mode-S 8A03C4 frequently asked

What is Mode-S code 8A03C4?
8A03C4 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GMY.
Where is Mode-S 8A03C4 registered?
Mode-S code 8A03C4 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A03C4 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A03C4, octal 42401704, decimal 9,044,932.
What flights does 8A03C4 operate?
Mode-S 8A03C4 has broadcast 20 distinct callsigns, including GIA898, GIA860, GIA456, GIA237, GIA234.