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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 Jul 26, 18:50 UTC
Flights observed
349
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 18:50 UTC

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 - 9 2026-07-11
GIA165 Garuda Indonesia 8 2026-07-24
GIA157 - 8 2026-07-13
GIA863 - 7 2026-07-12
GIA839 Garuda Indonesia 6 2026-07-21
GIA833 Garuda Indonesia 6 2026-07-21
GIA829 Garuda Indonesia 6 2026-07-26
GIA837 Garuda Indonesia 5 2026-07-26
GIA823 - 5 2026-07-03
GIA154 - 5 2026-07-13
GIA149 - 5 2026-07-07
GIA148 Garuda Indonesia 5 2026-07-22
GIA8320 - 4 2026-07-14
GIA682 - 4 2026-07-07
GIA656 Garuda Indonesia 4 2026-07-24
GIA622 - 4 2026-07-21
GIA604 - 4 2026-06-26
GIA509 - 4 2026-07-17
GIA322 - 4 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GIA648 CGK → TTE Jul 26, 18:25 UTCJul 26, 18:50 UTC25m
2026-07-26 GIA837 SIN → CGK Jul 26, 13:15 UTCJul 26, 13:35 UTC20m
2026-07-26 GIA837 SIN → CGK Jul 26, 12:15 UTCJul 26, 12:40 UTC25m
2026-07-26 GIA836 CGK → SIN Jul 26, 09:00 UTCJul 26, 10:05 UTC1h 5m
2026-07-26 GIA829 SIN → CGK Jul 26, 05:45 UTCJul 26, 06:05 UTC20m
2026-07-26 GIA829 SIN → CGK Jul 26, 04:45 UTCJul 26, 05:10 UTC25m
2026-07-26 GIA828 CGK → SIN Jul 26, 01:55 UTCJul 26, 02:55 UTC1h 0m
2026-07-26 GIA533 BDJ → CGK Jul 26, 00:20 UTCJul 26, 00:35 UTC15m
2026-07-25 GIA536 CGK → BDJ Jul 25, 11:35 UTCJul 25, 11:45 UTC10m
2026-07-24 GIA656 CGK → DJJ Jul 24, 16:40 UTCJul 25, 08:00 UTC15h 20m
2026-07-24 GIA165 PDG → CGK Jul 24, 11:45 UTCJul 24, 12:05 UTC20m
2026-07-24 GIA165 PDG → CGK Jul 24, 10:40 UTCJul 24, 11:15 UTC35m
2026-07-24 GIA162 CGK → PDG Jul 24, 08:50 UTCJul 24, 09:00 UTC10m
2026-07-24 GIA162 CGK → PDG Jul 24, 08:05 UTCJul 24, 08:15 UTC10m
2026-07-24 GIA581 AAP → CGK Jul 24, 06:10 UTCJul 24, 06:30 UTC20m
2026-07-23 GIA421 DPS → CGK Jul 23, 14:10 UTCJul 23, 14:25 UTC15m
2026-07-23 GIA414 CGK → DPS Jul 23, 09:25 UTCJul 23, 10:05 UTC40m
2026-07-23 GIA657 DJJ → CGK Jul 23, 07:35 UTCJul 23, 07:45 UTC10m
2026-07-22 GIA656 CGK → DJJ Jul 22, 16:40 UTCJul 22, 17:05 UTC25m
2026-07-22 GIA575 BPN → CGK Jul 22, 13:00 UTCJul 22, 13:10 UTC10m
2026-07-22 GIA148 CGK → BTH Jul 22, 03:55 UTCJul 22, 04:05 UTC10m
2026-07-22 GIA148 CGK → BTH Jul 22, 03:05 UTCJul 22, 03:15 UTC10m
2026-07-21 GIA622 - Jul 21, 19:35 UTCJul 21, 19:55 UTC20m
2026-07-21 GIA839 SIN → CGK Jul 21, 15:05 UTCJul 21, 15:20 UTC15m
2026-07-21 GIA839 SIN → CGK Jul 21, 14:15 UTCJul 21, 14:30 UTC15m
2026-07-21 GIA838 - Jul 21, 11:05 UTCJul 21, 12:20 UTC1h 15m
2026-07-21 GIA833 SIN → CGK Jul 21, 09:20 UTCJul 21, 09:35 UTC15m
2026-07-21 GIA833 SIN → CGK Jul 21, 08:30 UTCJul 21, 08:45 UTC15m
2026-07-21 GIA832 CGK → SIN Jul 21, 05:25 UTCJul 21, 06:25 UTC1h 0m
2026-07-20 GIA824 CGK → SIN Jul 20, 23:00 UTCJul 21, 03:15 UTC4h 15m
2026-07-20 GIA601 - Jul 20, 09:30 UTCJul 20, 09:45 UTC15m
2026-07-19 GIA206 CGK → YIA Jul 19, 12:45 UTCJul 20, 00:45 UTC12h 0m
2026-07-19 GIA647 - Jul 19, 03:25 UTCJul 19, 10:45 UTC7h 20m
2026-07-19 GIA551 - Jul 19, 01:30 UTCJul 19, 01:40 UTC10m
2026-07-18 GIA829 - Jul 18, 05:50 UTCJul 18, 06:05 UTC15m
2026-07-18 GIA829 - Jul 18, 04:45 UTCJul 18, 05:20 UTC35m
2026-07-18 GIA828 CGK → SIN Jul 18, 01:39 UTCJul 18, 02:35 UTC55m
2026-07-17 GIA509 - Jul 17, 12:25 UTCJul 17, 12:40 UTC15m
2026-07-17 GIA619 - Jul 17, 06:54 UTCJul 17, 07:05 UTC10m
2026-07-17 GIA618 CGK → UPG Jul 17, 01:45 UTCJul 17, 02:10 UTC25m
2026-07-17 GIA561 - Jul 17, 00:10 UTCJul 17, 00:20 UTC10m
2026-07-16 GIA601 - Jul 16, 09:45 UTCJul 16, 09:55 UTC10m
2026-07-16 GIA403 - Jul 16, 01:10 UTCJul 16, 01:20 UTC10m
2026-07-15 GIA424 - Jul 15, 13:25 UTCJul 15, 13:40 UTC15m
2026-07-15 GIA315 - Jul 15, 11:40 UTCJul 15, 11:55 UTC15m
2026-07-15 GIA326 - Jul 15, 08:25 UTCJul 15, 09:00 UTC35m
2026-07-15 GIA109 - Jul 15, 06:30 UTCJul 15, 06:50 UTC20m
2026-07-14 GIA8330 - Jul 14, 18:30 UTCJul 14, 20:15 UTC1h 45m
2026-07-14 GIA8320 - Jul 14, 16:05 UTCJul 14, 16:20 UTC15m
2026-07-14 GIA8320 - Jul 14, 14:35 UTCJul 14, 15:05 UTC30m

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 Jul 26, 18:50 UTC.
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, GIA165, GIA157, GIA863.