Apparatus

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sensors Mode-S transponder

8A0A53

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GUG · BOEING 737-800

Hex
8A0A53
Octal
42405123
Decimal
9,046,611
Country
ID
Tail
PK-GUG
Type
B738
No current signal · last broadcast Jul 26, 10:40 UTC
Flights observed
361
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 10:40 UTC

Last known position

Most recent position reported by Mode-S 8A0A53.

Country allocation

The ICAO 24-bit address 8A0A53 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
GIA432 - 11 2026-07-18
GIA837 - 9 2026-07-11
GIA320 - 8 2026-07-20
GIA537 Garuda Indonesia 7 2026-07-26
GIA431 - 7 2026-07-10
GIA141 Garuda Indonesia 7 2026-07-21
GIA422 - 6 2026-07-07
GIA402 - 6 2026-07-14
GIA836 - 5 2026-07-11
GIA823 Garuda Indonesia 5 2026-07-24
GIA648 Garuda Indonesia 5 2026-07-24
GIA575 - 5 2026-06-21
GIA407 - 5 2026-07-14
GIA325 - 5 2026-07-20
GIA213 - 5 2026-07-06
GIA212 - 5 2026-07-16
GIA206 - 5 2026-06-19
GIA205 - 5 2026-07-07
GIA203 - 5 2026-07-17
GIA187 Garuda Indonesia 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GIA537 BDJ → CGK Jul 26, 10:20 UTCJul 26, 10:40 UTC20m
2026-07-26 GIA535 BDJ → CGK Jul 26, 03:30 UTCJul 26, 03:50 UTC20m
2026-07-25 GIA612 CGK → UPG Jul 25, 08:55 UTCJul 25, 14:05 UTC5h 10m
2026-07-25 GIA109 PLM → CGK Jul 25, 06:15 UTCJul 25, 06:30 UTC15m
2026-07-25 GIA649 TTE → CGK Jul 25, 02:20 UTCJul 25, 02:30 UTC10m
2026-07-24 GIA648 CGK → TTE Jul 24, 18:30 UTCJul 24, 19:00 UTC30m
2026-07-24 GIA823 SIN → CGK Jul 24, 11:30 UTCJul 24, 11:45 UTC15m
2026-07-24 GIA823 SIN → CGK Jul 24, 10:20 UTCJul 24, 10:55 UTC35m
2026-07-23 GIA822 CGK → SIN Jul 23, 12:50 UTCJul 23, 14:15 UTC1h 25m
2026-07-23 GIA867 BKK → CGK Jul 23, 10:35 UTCJul 23, 10:55 UTC20m
2026-07-23 GIA867 BKK → CGK Jul 23, 07:45 UTCJul 23, 10:00 UTC2h 15m
2026-07-23 GIA866 CGK → BKK Jul 23, 02:50 UTCJul 23, 06:05 UTC3h 15m
2026-07-22 GIA183 KNO → CGK Jul 22, 23:20 UTCJul 23, 01:05 UTC1h 45m
2026-07-22 GIA196 - Jul 22, 12:35 UTCJul 22, 14:10 UTC1h 35m
2026-07-22 GIA419 DPS → CGK Jul 22, 11:15 UTCJul 22, 11:25 UTC10m
2026-07-22 GIA610 CGK → UPG Jul 22, 00:10 UTCJul 22, 05:25 UTC5h 15m
2026-07-21 GIA509 - Jul 21, 11:25 UTCJul 21, 11:40 UTC15m
2026-07-21 GIA141 BTJ → CGK Jul 21, 00:50 UTCJul 21, 06:45 UTC5h 55m
2026-07-20 GIA325 - Jul 20, 13:15 UTCJul 20, 13:30 UTC15m
2026-07-20 GIA320 - Jul 20, 09:35 UTCJul 20, 10:15 UTC40m
2026-07-20 GIA187 KNO → CGK Jul 20, 07:55 UTCJul 20, 08:10 UTC15m
2026-07-20 GIA187 KNO → CGK Jul 20, 06:20 UTCJul 20, 07:00 UTC40m
2026-07-20 GIA184 CGK → KNO Jul 20, 02:50 UTCJul 20, 04:25 UTC1h 35m
2026-07-20 GIA305 SUB → CGK Jul 20, 01:10 UTCJul 20, 01:25 UTC15m
2026-07-19 GIA324 - Jul 19, 13:40 UTCJul 19, 14:25 UTC45m
2026-07-19 GIA823 - Jul 19, 11:30 UTCJul 19, 11:45 UTC15m
2026-07-19 GIA823 - Jul 19, 10:20 UTCJul 19, 10:50 UTC30m
2026-07-18 GIA822 - Jul 18, 12:45 UTCJul 18, 14:00 UTC1h 15m
2026-07-18 GIA537 - Jul 18, 10:35 UTCJul 18, 10:50 UTC15m
2026-07-18 GIA432 - Jul 18, 01:10 UTCJul 18, 05:25 UTC4h 16m
2026-07-17 GIA203 - Jul 17, 12:00 UTCJul 17, 12:40 UTC40m
2026-07-17 GIA254 - Jul 17, 04:44 UTCJul 17, 10:15 UTC5h 30m
2026-07-17 GIA202 - Jul 17, 02:45 UTCJul 17, 03:10 UTC25m
2026-07-16 GIA183 - Jul 16, 23:20 UTCJul 17, 01:09 UTC1h 50m
2026-07-16 GIA196 - Jul 16, 12:34 UTCJul 16, 14:10 UTC1h 35m
2026-07-16 GIA212 - Jul 16, 08:10 UTCJul 16, 10:59 UTC2h 50m
2026-07-16 GIA137 - Jul 16, 06:20 UTCJul 16, 06:40 UTC20m
2026-07-16 GIA649 - Jul 16, 02:25 UTCJul 16, 02:40 UTC15m
2026-07-15 GIA648 - Jul 15, 18:35 UTCJul 15, 19:00 UTC25m
2026-07-15 GIA420 - Jul 15, 11:05 UTCJul 15, 15:15 UTC4h 10m
2026-07-15 GIA513 - Jul 15, 08:50 UTCJul 15, 09:05 UTC15m
2026-07-15 GIA403 - Jul 15, 01:10 UTCJul 15, 01:30 UTC20m
2026-07-14 GIA426 - Jul 14, 12:00 UTCJul 14, 12:45 UTC45m
2026-07-14 GIA221 - Jul 14, 09:25 UTCJul 14, 10:15 UTC50m
2026-07-14 GIA228 - Jul 14, 07:30 UTCJul 14, 08:20 UTC50m
2026-07-14 GIA407 - Jul 14, 05:45 UTCJul 14, 05:55 UTC10m
2026-07-14 GIA402 - Jul 14, 00:20 UTCJul 14, 01:05 UTC45m
2026-07-13 GIA509 - Jul 13, 11:40 UTCJul 13, 11:55 UTC15m
2026-07-13 GIA137 - Jul 13, 06:10 UTCJul 13, 06:35 UTC25m
2026-07-12 GIA413 - Jul 12, 01:45 UTCJul 12, 06:40 UTC4h 55m

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

Mode-S 8A0A53 frequently asked

What is Mode-S code 8A0A53?
8A0A53 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GUG.
Where is Mode-S 8A0A53 registered?
Mode-S code 8A0A53 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A0A53 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A0A53, octal 42405123, decimal 9,046,611.
What flights does 8A0A53 operate?
Mode-S 8A0A53 has broadcast 20 distinct callsigns, including GIA432, GIA837, GIA320, GIA537, GIA431.