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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 GIA179 · 2,125 ft
Flights observed
445
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 14:10 UTC

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 47 2026-07-25
GIA237 Garuda Indonesia 45 2026-07-25
GIA324 Garuda Indonesia 34 2026-07-26
GIA209 Garuda Indonesia 29 2026-07-25
GIA208 Garuda Indonesia 27 2026-07-25
GIA185 Garuda Indonesia 20 2026-07-26
GIA182 Garuda Indonesia 16 2026-07-26
GIA323 Garuda Indonesia 15 2026-07-24
GIA107 - 15 2026-06-29
GIA503 Garuda Indonesia 14 2026-07-25
GIA102 - 14 2026-06-29
GIA119 - 10 2026-06-29
GIA114 - 9 2026-06-29
GIA108 Garuda Indonesia 9 2026-07-26
GIA513 - 8 2026-06-29
GIA113 Garuda Indonesia 8 2026-07-26
GIA241 Garuda Indonesia 6 2026-07-24
GIA238 Garuda Indonesia 6 2026-07-24
GIA500 Garuda Indonesia 5 2026-07-24
GIA165 Garuda Indonesia 5 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GIA324 CGK → SUB Jul 26, 13:30 UTCJul 26, 14:10 UTC40m
2026-07-26 GIA113 PLM → CGK Jul 26, 09:25 UTCJul 26, 09:45 UTC20m
2026-07-26 GIA108 CGK → PLM Jul 26, 07:15 UTCJul 26, 07:25 UTC10m
2026-07-26 GIA185 KNO → CGK Jul 26, 03:40 UTCJul 26, 05:25 UTC1h 45m
2026-07-26 GIA182 CGK → KNO Jul 26, 00:30 UTCJul 26, 02:05 UTC1h 35m
2026-07-25 GIA237 SRG → CGK Jul 25, 11:25 UTCJul 25, 11:55 UTC30m
2026-07-25 GIA234 CGK → SRG Jul 25, 09:15 UTCJul 25, 09:35 UTC20m
2026-07-25 GIA209 YIA → CGK Jul 25, 06:55 UTCJul 25, 07:45 UTC50m
2026-07-25 GIA208 CGK → YIA Jul 25, 04:45 UTCJul 25, 05:15 UTC30m
2026-07-25 GIA503 PNK → CGK Jul 25, 02:55 UTCJul 25, 03:05 UTC10m
2026-07-24 GIA500 CGK → PNK Jul 24, 23:30 UTCJul 24, 23:40 UTC10m
2026-07-24 GIA414 CGK → DPS Jul 24, 09:15 UTCJul 24, 13:55 UTC4h 40m
2026-07-24 GIA241 SRG → CGK Jul 24, 06:20 UTCJul 24, 06:55 UTC35m
2026-07-24 GIA238 CGK → SRG Jul 24, 04:10 UTCJul 24, 04:35 UTC25m
2026-07-24 GIA323 SUB → CGK Jul 24, 01:50 UTCJul 24, 02:45 UTC55m
2026-07-23 GIA324 CGK → SUB Jul 23, 13:20 UTCJul 23, 14:05 UTC45m
2026-07-23 GIA237 SRG → CGK Jul 23, 11:25 UTCJul 23, 11:55 UTC30m
2026-07-23 GIA234 CGK → SRG Jul 23, 09:10 UTCJul 23, 09:35 UTC25m
2026-07-23 GIA208 CGK → YIA Jul 23, 04:35 UTCJul 23, 07:35 UTC3h 0m
2026-07-22 GIA324 - Jul 22, 13:50 UTCJul 22, 14:35 UTC45m
2026-07-22 GIA208 CGK → YIA Jul 22, 04:40 UTCJul 22, 11:50 UTC7h 10m
2026-07-22 GIA503 PNK → CGK Jul 22, 03:00 UTCJul 22, 03:10 UTC10m
2026-07-21 GIA237 SRG → CGK Jul 21, 11:20 UTCJul 21, 11:55 UTC35m
2026-07-21 GIA234 CGK → SRG Jul 21, 09:05 UTCJul 21, 09:30 UTC25m
2026-07-21 GIA208 CGK → YIA Jul 21, 04:40 UTCJul 21, 07:40 UTC3h 0m
2026-07-21 GIA503 PNK → CGK Jul 21, 02:50 UTCJul 21, 03:05 UTC15m
2026-07-20 GIA179 PKU → CGK Jul 20, 12:45 UTCJul 20, 13:00 UTC15m
2026-07-20 GIA179 PKU → CGK Jul 20, 11:40 UTCJul 20, 12:15 UTC35m
2026-07-20 GIA176 CGK → PKU Jul 20, 08:35 UTCJul 20, 09:45 UTC1h 10m
2026-07-20 GIA581 - Jul 20, 06:20 UTCJul 20, 06:35 UTC15m
2026-07-19 GIA237 - Jul 19, 11:35 UTCJul 19, 12:05 UTC30m
2026-07-19 GIA234 CGK → SRG Jul 19, 09:20 UTCJul 19, 09:45 UTC25m
2026-07-19 209 - Jul 19, 06:50 UTCJul 19, 07:40 UTC50m
2026-07-19 GIA208 CGK → YIA Jul 19, 05:00 UTCJul 19, 05:25 UTC25m
2026-07-18 GIA324 - Jul 18, 13:30 UTCJul 19, 02:45 UTC13h 15m
2026-07-18 GIA237 - Jul 18, 11:35 UTCJul 18, 12:05 UTC30m
2026-07-18 GIA234 CGK → SRG Jul 18, 09:10 UTCJul 18, 09:35 UTC25m
2026-07-18 GIA209 - Jul 18, 06:55 UTCJul 18, 07:45 UTC50m
2026-07-18 GIA208 CGK → YIA Jul 18, 04:50 UTCJul 18, 05:15 UTC25m
2026-07-18 GIA503 PNK → CGK Jul 18, 03:05 UTCJul 18, 03:20 UTC15m
2026-07-17 GIA237 - Jul 17, 11:30 UTCJul 17, 12:04 UTC35m
2026-07-17 GIA234 - Jul 17, 09:15 UTCJul 17, 09:40 UTC25m
2026-07-17 GIA1274 DJB → CGK Jul 17, 07:00 UTCJul 17, 07:20 UTC20m
2026-07-17 GIA1274 DJB → CGK Jul 17, 06:20 UTCJul 17, 06:29 UTC10m
2026-07-17 GIA1264 CGK → DJB Jul 17, 04:14 UTCJul 17, 05:10 UTC55m
2026-07-17 GIA323 - Jul 17, 02:25 UTCJul 17, 02:39 UTC15m
2026-07-16 GIA324 - Jul 16, 13:40 UTCJul 16, 14:25 UTC45m
2026-07-16 GIA563 - Jul 16, 11:34 UTCJul 16, 11:50 UTC15m
2026-07-16 GIA185 - Jul 16, 00:35 UTCJul 16, 05:30 UTC4h 55m
2026-07-15 GIA221 - Jul 15, 09:05 UTCJul 15, 09:55 UTC50m

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.