Apparatus

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sensors Mode-S transponder

8A09EF

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GUD · BOEING 737-800

Hex
8A09EF
Octal
42404757
Decimal
9,046,511
Country
ID
Tail
PK-GUD
Type
B738
Broadcasting now · callsign GIA312 · 35,000 ft
Flights observed
191
Distinct callsigns
20
Country
ID
Last broadcast
1h ago

Current position

8A09EF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 8A09EF 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
GIA234 Garuda Indonesia 17 2026-05-28
GIA237 Garuda Indonesia 15 2026-05-28
GIA324 Garuda Indonesia 12 2026-05-28
GIA209 Garuda Indonesia 12 2026-05-21
GIA208 Garuda Indonesia 10 2026-05-28
GIA182 Garuda Indonesia 10 2026-05-13
GIA107 Garuda Indonesia 10 2026-05-28
GIA185 Garuda Indonesia 9 2026-05-13
GIA102 Garuda Indonesia 9 2026-05-28
GIA513 Garuda Indonesia 5 2026-05-29
GIA323 Garuda Indonesia 5 2026-05-19
GIA119 Garuda Indonesia 5 2026-05-25
GIA113 Garuda Indonesia 5 2026-05-13
GIA108 Garuda Indonesia 5 2026-05-13
GIA114 Garuda Indonesia 4 2026-05-25
GIA312 Garuda Indonesia 3 2026-05-24
GIA204 Garuda Indonesia 3 2026-05-30
GIA187 Garuda Indonesia 3 2026-05-01
GIA165 Garuda Indonesia 3 2026-05-15
GIA153 Garuda Indonesia 3 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 GIA204 CGK → YIA May 30, 01:00 UTCMay 30, 03:45 UTC2h 45m
2026-05-29 GIA513 PNK → CGK May 29, 08:20 UTCMay 29, 08:35 UTC15m
2026-05-29 GIA512 CGK → PNK May 29, 04:50 UTCMay 29, 05:00 UTC10m
2026-05-28 GIA324 CGK → SUB May 28, 13:20 UTCMay 28, 14:10 UTC50m
2026-05-28 GIA237 SRG → CGK May 28, 11:20 UTCMay 28, 11:45 UTC25m
2026-05-28 GIA234 CGK → SRG May 28, 08:55 UTCMay 28, 09:20 UTC25m
2026-05-28 GIA208 CGK → YIA May 28, 04:40 UTCMay 28, 07:25 UTC2h 45m
2026-05-28 GIA107 PLM → CGK May 28, 03:10 UTCMay 28, 03:20 UTC10m
2026-05-28 GIA102 CGK → PLM May 28, 00:35 UTCMay 28, 00:50 UTC15m
2026-05-27 GIA4094 DPS → CGK May 27, 08:25 UTCMay 27, 08:40 UTC15m
2026-05-27 GIA4044 CGK → DPS May 27, 04:19 UTCMay 27, 04:59 UTC40m
2026-05-26 GIA237 SRG → CGK May 26, 11:44 UTCMay 26, 12:00 UTC15m
2026-05-26 GIA234 CGK → SRG May 26, 08:59 UTCMay 26, 09:29 UTC30m
2026-05-26 GIA225 SOC → CGK May 26, 03:55 UTCMay 26, 04:39 UTC45m
2026-05-26 GIA222 CGK → SOC May 26, 01:55 UTCMay 26, 02:55 UTC1h 0m
2026-05-25 GIA119 PLM → CGK May 25, 12:20 UTCMay 25, 12:35 UTC15m
2026-05-25 GIA114 CGK → PLM May 25, 09:55 UTCMay 25, 10:05 UTC10m
2026-05-24 GIA324 CGK → SUB May 24, 13:35 UTCMay 24, 14:20 UTC45m
2026-05-24 GIA312 CGK → SUB May 24, 05:20 UTCMay 24, 08:55 UTC3h 35m
2026-05-24 GIA107 PLM → CGK May 24, 03:10 UTCMay 24, 03:25 UTC15m
2026-05-24 GIA102 CGK → PLM May 24, 00:40 UTCMay 24, 00:50 UTC10m
2026-05-23 GIA430 CGK → LOP May 23, 04:45 UTCMay 23, 09:05 UTC4h 20m
2026-05-23 GIA503 PNK → CGK May 23, 03:10 UTCMay 23, 03:30 UTC20m
2026-05-22 GIA500 CGK → PNK May 22, 23:35 UTCMay 22, 23:45 UTC10m
2026-05-22 GIA317 SUB → CGK May 22, 08:35 UTCMay 22, 09:00 UTC25m
2026-05-22 GIA312 CGK → SUB May 22, 05:25 UTCMay 22, 06:10 UTC45m
2026-05-22 GIA102 CGK → PLM May 22, 00:45 UTCMay 22, 00:55 UTC10m
2026-05-21 GIA209 YIA → CGK May 21, 07:05 UTCMay 21, 07:45 UTC40m
2026-05-21 GIA208 CGK → YIA May 21, 04:55 UTCMay 21, 05:20 UTC25m
2026-05-21 GIA107 PLM → CGK May 21, 03:20 UTCMay 21, 03:35 UTC15m
2026-05-21 GIA102 CGK → PLM May 21, 00:45 UTCMay 21, 00:55 UTC10m
2026-05-20 GIA414 CGK → DPS May 20, 09:05 UTCMay 20, 13:35 UTC4h 30m
2026-05-20 GIA1274 DJB → CGK May 20, 06:20 UTCMay 20, 07:25 UTC1h 5m
2026-05-20 GIA1264 CGK → DJB May 20, 04:20 UTCMay 20, 05:20 UTC1h 1m
2026-05-19 GIA324 CGK → SUB May 19, 13:25 UTCMay 20, 02:55 UTC13h 30m
2026-05-19 GIA237 SRG → CGK May 19, 11:25 UTCMay 19, 12:00 UTC35m
2026-05-19 GIA234 CGK → SRG May 19, 09:15 UTCMay 19, 09:35 UTC20m
2026-05-19 GIA241 SRG → CGK May 19, 06:15 UTCMay 19, 06:45 UTC30m
2026-05-19 GIA238 CGK → SRG May 19, 04:10 UTCMay 19, 04:35 UTC25m
2026-05-19 GIA323 SUB → CGK May 19, 02:15 UTCMay 19, 02:30 UTC15m
2026-05-18 GIA324 CGK → SUB May 18, 13:20 UTCMay 18, 13:45 UTC25m
2026-05-18 GIA237 SRG → CGK May 18, 11:20 UTCMay 18, 11:55 UTC35m
2026-05-18 GIA234 CGK → SRG May 18, 09:00 UTCMay 18, 09:25 UTC25m
2026-05-18 GIA209 YIA → CGK May 18, 04:40 UTCMay 18, 07:35 UTC2h 55m
2026-05-18 GIA323 SUB → CGK May 18, 02:35 UTCMay 18, 02:50 UTC15m
2026-05-17 GIA324 CGK → SUB May 17, 13:25 UTCMay 17, 14:10 UTC45m
2026-05-17 GIA237 SRG → CGK May 17, 11:25 UTCMay 17, 11:50 UTC25m
2026-05-17 GIA234 CGK → SRG May 17, 09:00 UTCMay 17, 09:25 UTC25m
2026-05-17 GIA208 CGK → YIA May 17, 04:40 UTCMay 17, 07:30 UTC2h 50m
2026-05-17 GIA153 BTH → CGK May 17, 03:00 UTCMay 17, 03:15 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-GUD page for operator, model, and routing details .

Mode-S 8A09EF frequently asked

What is Mode-S code 8A09EF?
8A09EF is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GUD.
Where is Mode-S 8A09EF registered?
Mode-S code 8A09EF is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A09EF broadcasting right now?
Yes. Mode-S 8A09EF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A09EF, octal 42404757, decimal 9,046,511.
What flights does 8A09EF operate?
Mode-S 8A09EF has broadcast 20 distinct callsigns, including GIA234, GIA237, GIA324, GIA209, GIA208.