Apparatus

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sensors Mode-S transponder

8A023F

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GMP · BOEING 737-800

Hex
8A023F
Octal
42401077
Decimal
9,044,543
Country
ID
Tail
PK-GMP
Type
B738
No current signal · last broadcast 19h ago
Flights observed
217
Distinct callsigns
20
Country
ID
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S 8A023F.

Country allocation

The ICAO 24-bit address 8A023F 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
GIA183 Garuda Indonesia 7 2026-06-08
GIA149 - 7 2026-07-16
GIA821 - 6 2026-06-30
GIA604 - 6 2026-06-22
GIA867 - 5 2026-06-24
GIA866 - 5 2026-06-24
GIA422 - 5 2026-07-04
GIA838 Garuda Indonesia 4 2026-05-18
GIA837 Garuda Indonesia 4 2026-07-03
GIA825 - 4 2026-07-08
GIA823 Garuda Indonesia 4 2026-06-12
GIA820 - 4 2026-06-30
GIA175 Garuda Indonesia 4 2026-05-22
GIA155 - 4 2026-07-02
GIA836 - 3 2026-07-03
GIA824 - 3 2026-07-07
GIA822 - 3 2026-06-24
GIA551 - 3 2026-07-12
GIA509 - 3 2026-07-16
GIA433 - 3 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GIA252 - Jul 17, 07:00 UTCJul 17, 07:14 UTC15m
2026-07-16 GIA509 - Jul 16, 12:00 UTCJul 16, 12:14 UTC15m
2026-07-16 GIA149 - Jul 16, 03:55 UTCJul 16, 06:15 UTC2h 20m
2026-07-15 GIA206 - Jul 15, 12:30 UTCJul 15, 12:55 UTC25m
2026-07-15 GIA213 - Jul 15, 10:20 UTCJul 15, 10:55 UTC35m
2026-07-15 GIA127 - Jul 15, 05:30 UTCJul 15, 05:45 UTC15m
2026-07-15 GIA126 - Jul 15, 02:40 UTCJul 15, 02:50 UTC10m
2026-07-14 GIA246 - Jul 14, 10:50 UTCJul 14, 11:15 UTC25m
2026-07-14 GIA077 - Jul 14, 03:15 UTCJul 14, 03:50 UTC35m
2026-07-14 GIA076 - Jul 14, 01:50 UTCJul 14, 02:05 UTC15m
2026-07-13 GIA179 - Jul 13, 12:05 UTCJul 13, 12:20 UTC15m
2026-07-13 GIA179 - Jul 13, 11:00 UTCJul 13, 11:35 UTC35m
2026-07-13 GIA176 - Jul 13, 05:20 UTCJul 13, 09:50 UTC4h 30m
2026-07-13 GIA148 - Jul 13, 02:40 UTCJul 13, 03:40 UTC1h 0m
2026-07-12 GIA206 - Jul 12, 12:35 UTCJul 12, 13:01 UTC25m
2026-07-12 GIA213 - Jul 12, 10:25 UTCJul 12, 11:01 UTC35m
2026-07-12 GIA137 - Jul 12, 06:20 UTCJul 12, 06:35 UTC15m
2026-07-12 GIA551 - Jul 12, 01:25 UTCJul 12, 01:40 UTC15m
2026-07-11 GIA149 - Jul 11, 07:00 UTCJul 11, 07:15 UTC15m
2026-07-11 GIA149 - Jul 11, 03:10 UTCJul 11, 06:25 UTC3h 15m
2026-07-10 GIA417 - Jul 10, 12:15 UTCJul 10, 12:25 UTC10m
2026-07-10 GIA829 - Jul 10, 06:00 UTCJul 10, 06:15 UTC15m
2026-07-10 GIA829 - Jul 10, 04:50 UTCJul 10, 05:20 UTC30m
2026-07-10 GIA828 - Jul 10, 02:30 UTCJul 10, 02:55 UTC25m
2026-07-08 GIA072 - Jul 8, 11:15 UTCJul 8, 11:30 UTC15m
2026-07-08 GIA177 - Jul 8, 07:55 UTCJul 8, 08:35 UTC40m
2026-07-08 GIA174 - Jul 8, 05:20 UTCJul 8, 06:30 UTC1h 10m
2026-07-08 GIA825 - Jul 8, 02:20 UTCJul 8, 02:30 UTC10m
2026-07-07 GIA824 - Jul 7, 23:00 UTCJul 8, 00:25 UTC1h 25m
2026-07-07 GIA410 - Jul 7, 08:05 UTCJul 7, 08:45 UTC40m
2026-07-07 GIA402 - Jul 7, 00:30 UTCJul 7, 05:25 UTC4h 55m
2026-07-06 GIA193 KNO → CGK Jul 6, 15:05 UTCJul 6, 15:15 UTC10m
2026-07-06 GIA193 KNO → CGK Jul 6, 10:40 UTCJul 6, 14:35 UTC3h 55m
2026-07-06 GIA653 - Jul 6, 08:20 UTCJul 6, 08:35 UTC15m
2026-07-05 GIA509 - Jul 5, 12:05 UTCJul 5, 12:20 UTC15m
2026-07-05 GIA141 - Jul 5, 01:40 UTCJul 5, 07:10 UTC5h 30m
2026-07-04 GIA422 - Jul 4, 07:15 UTCJul 4, 11:35 UTC4h 20m
2026-07-04 GIA610 - Jul 4, 00:15 UTCJul 4, 00:40 UTC25m
2026-07-03 GIA837 SIN → CGK Jul 3, 12:50 UTCJul 3, 13:00 UTC10m
2026-07-03 GIA836 - Jul 3, 09:50 UTCJul 3, 10:45 UTC55m
2026-07-03 GIA619 - Jul 3, 06:40 UTCJul 3, 07:10 UTC30m
2026-07-02 GIA615 - Jul 2, 14:05 UTCJul 2, 14:20 UTC15m
2026-07-02 GIA155 - Jul 2, 06:55 UTCJul 2, 07:15 UTC20m
2026-07-02 GIA152 - Jul 2, 04:00 UTCJul 2, 06:25 UTC2h 25m
2026-07-02 GIA623 - Jul 2, 01:35 UTCJul 2, 01:50 UTC15m
2026-07-01 GIA165 - Jul 1, 11:50 UTCJul 1, 12:05 UTC15m
2026-07-01 GIA165 - Jul 1, 10:40 UTCJul 1, 11:15 UTC35m
2026-07-01 GIA162 - Jul 1, 08:00 UTCJul 1, 08:10 UTC10m
2026-07-01 GIA456 - Jul 1, 00:00 UTCJul 1, 06:35 UTC6h 35m
2026-06-30 GIA837 SIN → CGK Jun 30, 12:00 UTCJun 30, 13:20 UTC1h 20m

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

Mode-S 8A023F frequently asked

What is Mode-S code 8A023F?
8A023F is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GMP.
Where is Mode-S 8A023F registered?
Mode-S code 8A023F is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A023F broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A023F, octal 42401077, decimal 9,044,543.
What flights does 8A023F operate?
Mode-S 8A023F has broadcast 20 distinct callsigns, including GIA183, GIA149, GIA821, GIA604, GIA867.