Apparatus

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sensors Mode-S transponder

8A03C9

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GFX · BOEING 737-800

Hex
8A03C9
Octal
42401711
Decimal
9,044,937
Country
ID
Tail
PK-GFX
Type
B738
No current signal · last broadcast 15h ago
Flights observed
133
Distinct callsigns
20
Country
ID
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 8A03C9.

Country allocation

The ICAO 24-bit address 8A03C9 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
GIA127 Garuda Indonesia 9 2026-05-28
GIA867 Garuda Indonesia 4 2026-05-21
GIA322 Garuda Indonesia 4 2026-05-06
GIA206 Garuda Indonesia 4 2026-05-28
GIA165 Garuda Indonesia 4 2026-05-12
GIA126 Garuda Indonesia 4 2026-05-28
GIA823 Garuda Indonesia 3 2026-05-22
GIA327 Garuda Indonesia 3 2026-05-06
GIA315 Garuda Indonesia 3 2026-04-27
GIA310 Garuda Indonesia 3 2026-04-27
GIA245 Garuda Indonesia 3 2026-05-29
GIA228 Garuda Indonesia 3 2026-05-18
GIA221 Garuda Indonesia 3 2026-05-18
GIA149 Garuda Indonesia 3 2026-05-10
GIA141 Garuda Indonesia 3 2026-05-15
GIA866 Garuda Indonesia 2 2026-05-21
GIA822 Garuda Indonesia 2 2026-05-21
GIA604 Garuda Indonesia 2 2026-05-02
GIA581 Garuda Indonesia 2 2026-05-12
GIA551 - 2 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 GIA245 SRG → CGK May 29, 09:20 UTCMay 29, 09:35 UTC15m
2026-05-29 GIA242 CGK → SRG May 29, 06:35 UTCMay 29, 07:05 UTC30m
2026-05-28 GIA206 CGK → YIA May 28, 12:25 UTCMay 29, 00:45 UTC12h 20m
2026-05-28 GIA213 YIA → CGK May 28, 09:55 UTCMay 28, 10:45 UTC50m
2026-05-28 GIA212 CGK → YIA May 28, 07:55 UTCMay 28, 08:20 UTC25m
2026-05-28 GIA127 DJB → CGK May 28, 04:20 UTCMay 28, 05:10 UTC50m
2026-05-28 GIA126 CGK → DJB May 28, 02:10 UTCMay 28, 03:05 UTC55m
2026-05-28 GIA101 PLM → CGK May 28, 00:10 UTCMay 28, 00:20 UTC10m
2026-05-27 GIA7744 TKG → CGK May 27, 09:15 UTCMay 27, 09:30 UTC15m
2026-05-27 GIA7644 CGK → TKG May 27, 07:30 UTCMay 27, 07:40 UTC10m
2026-05-27 GIA225 SOC → CGK May 27, 04:30 UTCMay 27, 04:45 UTC15m
2026-05-26 GIA426 CGK → DPS May 26, 11:54 UTCMay 26, 12:05 UTC10m
2026-05-26 GIA408 CGK → DPS May 26, 04:39 UTCMay 26, 05:20 UTC40m
2026-05-25 GIA500 CGK → PNK May 25, 23:35 UTCMay 25, 23:45 UTC10m
2026-05-25 GIA189 KNO → CGK May 25, 08:25 UTCMay 25, 09:35 UTC1h 10m
2026-05-25 GIA186 CGK → KNO May 25, 04:50 UTCMay 25, 06:05 UTC1h 15m
2026-05-24 GIA452 CGK → LBJ May 24, 06:55 UTCMay 24, 12:10 UTC5h 15m
2026-05-24 GIA127 DJB → CGK May 24, 04:15 UTCMay 24, 04:30 UTC15m
2026-05-24 GIA126 CGK → DJB May 24, 02:15 UTCMay 24, 02:25 UTC10m
2026-05-23 GIA245 SRG → CGK May 23, 08:55 UTCMay 23, 09:30 UTC35m
2026-05-23 GIA242 CGK → SRG May 23, 06:45 UTCMay 23, 07:15 UTC30m
2026-05-22 GIA664 CGK → DJJ May 22, 16:00 UTCMay 23, 04:05 UTC12h 5m
2026-05-22 GIA823 SIN → CGK May 22, 10:15 UTCMay 22, 10:45 UTC30m
2026-05-21 GIA822 CGK → SIN May 21, 13:20 UTCMay 21, 13:55 UTC35m
2026-05-21 GIA822 CGK → SIN May 21, 12:40 UTCMay 21, 12:50 UTC10m
2026-05-21 GIA867 BKK → CGK May 21, 10:20 UTCMay 21, 10:30 UTC10m
2026-05-21 GIA867 BKK → CGK May 21, 07:25 UTCMay 21, 09:40 UTC2h 15m
2026-05-21 GIA866 CGK → BKK May 21, 02:40 UTCMay 21, 05:50 UTC3h 10m
2026-05-20 GIA109 PLM → CGK May 20, 06:15 UTCMay 20, 06:25 UTC10m
2026-05-20 GIA104 CGK → PLM May 20, 03:55 UTCMay 20, 04:05 UTC10m
2026-05-20 GIA551 - May 20, 01:30 UTCMay 20, 01:45 UTC15m
2026-05-19 GIA567 BPN → CGK May 19, 06:25 UTCMay 19, 06:40 UTC15m
2026-05-18 GIA221 SOC → CGK May 18, 09:15 UTCMay 18, 10:05 UTC50m
2026-05-18 GIA228 CGK → SOC May 18, 07:10 UTCMay 18, 07:50 UTC40m
2026-05-18 GIA407 DPS → CGK May 18, 05:45 UTCMay 18, 05:55 UTC10m
2026-05-18 GIA402 CGK → DPS May 18, 00:25 UTCMay 18, 01:05 UTC40m
2026-05-17 GIA823 SIN → CGK May 17, 11:30 UTCMay 17, 11:40 UTC10m
2026-05-17 GIA823 SIN → CGK May 17, 10:25 UTCMay 17, 10:55 UTC30m
2026-05-17 GIA404 CGK → DPS May 17, 02:50 UTCMay 17, 03:35 UTC45m
2026-05-15 GIA682 CGK → SOQ May 15, 17:35 UTCMay 16, 09:31 UTC15h 56m
2026-05-15 GIA237 SRG → CGK May 15, 11:30 UTCMay 15, 12:00 UTC30m
2026-05-15 GIA234 CGK → SRG May 15, 09:00 UTCMay 15, 09:25 UTC25m
2026-05-15 GIA141 BTJ → CGK May 15, 07:10 UTCMay 15, 07:20 UTC10m
2026-05-15 GIA141 BTJ → CGK May 15, 00:55 UTCMay 15, 06:40 UTC5h 45m
2026-05-14 GIA867 BKK → CGK May 14, 10:25 UTCMay 14, 10:40 UTC15m
2026-05-14 GIA867 BKK → CGK May 14, 07:30 UTCMay 14, 09:45 UTC2h 15m
2026-05-14 GIA866 CGK → BKK May 14, 02:45 UTCMay 14, 05:50 UTC3h 5m
2026-05-13 GIA326 CGK → SUB May 13, 10:40 UTCMay 13, 11:05 UTC25m
2026-05-13 GIA653 DPS → CGK May 13, 08:35 UTCMay 13, 08:50 UTC15m
2026-05-12 GIA652 CGK → DPS May 12, 14:50 UTCMay 12, 15:30 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-GFX page for operator, model, and routing details .

Mode-S 8A03C9 frequently asked

What is Mode-S code 8A03C9?
8A03C9 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GFX.
Where is Mode-S 8A03C9 registered?
Mode-S code 8A03C9 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A03C9 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A03C9, octal 42401711, decimal 9,044,937.
What flights does 8A03C9 operate?
Mode-S 8A03C9 has broadcast 20 distinct callsigns, including GIA127, GIA867, GIA322, GIA206, GIA165.