Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

8A0509

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GQK · AIRBUS A-320

Hex
8A0509
Octal
42402411
Decimal
9,045,257
Country
ID
Tail
PK-GQK
Type
A320
No current signal · last broadcast 9h ago
Flights observed
377
Distinct callsigns
20
Country
ID
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 8A0509.

Country allocation

The ICAO 24-bit address 8A0509 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
CTV975 - 12 2026-07-13
CTV974 - 7 2026-07-13
CTV913 - 7 2026-06-26
CTV680 - 7 2026-07-10
CTV503 - 7 2026-06-21
CTV986 - 6 2026-06-25
CTV917 - 6 2026-06-29
CTV991 - 5 2026-06-22
CTV987 - 5 2026-06-25
CTV965 Escuela De Pilotos Are Aviacion 5 2026-06-15
CTV939 - 5 2026-06-22
CTV912 - 5 2026-06-26
CTV883 Escuela De Pilotos Are Aviacion 5 2026-05-21
CTV632 - 5 2026-06-21
CTV990 - 4 2026-06-22
CTV989 Escuela De Pilotos Are Aviacion 4 2026-06-11
CTV988 Escuela De Pilotos Are Aviacion 4 2026-06-12
CTV979 - 4 2026-07-14
CTV977 - 4 2026-07-08
CTV964 - 4 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CTV979 - Jul 14, 07:50 UTCJul 14, 13:15 UTC5h 25m
2026-07-14 CTV641 - Jul 14, 06:10 UTCJul 14, 06:25 UTC15m
2026-07-14 CTV640 - Jul 14, 02:10 UTCJul 14, 02:55 UTC45m
2026-07-13 CTV937 - Jul 13, 23:20 UTCJul 14, 00:45 UTC1h 25m
2026-07-13 CTV938 - Jul 13, 11:55 UTCJul 13, 13:00 UTC1h 5m
2026-07-13 CTV975 - Jul 13, 10:25 UTCJul 13, 10:50 UTC25m
2026-07-13 CTV975 - Jul 13, 09:40 UTCJul 13, 09:55 UTC15m
2026-07-13 CTV974 - Jul 13, 07:10 UTCJul 13, 08:10 UTC1h 0m
2026-07-13 CTV767 SRG → CGK Jul 13, 04:50 UTCJul 13, 05:35 UTC45m
2026-07-13 CTV766 - Jul 13, 03:10 UTCJul 13, 04:00 UTC50m
2026-07-13 CTV775 - Jul 13, 01:05 UTCJul 13, 01:40 UTC35m
2026-07-12 CTV776 - Jul 12, 12:01 UTCJul 12, 12:30 UTC30m
2026-07-12 CTV793 - Jul 12, 10:35 UTCJul 12, 10:50 UTC15m
2026-07-12 CTV792 - Jul 12, 08:15 UTCJul 12, 08:40 UTC25m
2026-07-12 CTV716 - Jul 12, 03:40 UTCJul 12, 07:01 UTC3h 20m
2026-07-12 CTV941 - Jul 12, 01:55 UTCJul 12, 02:10 UTC15m
2026-07-12 CTV941 - Jul 12, 00:55 UTCJul 12, 01:20 UTC25m
2026-07-11 CTV940 - Jul 11, 22:20 UTCJul 11, 23:20 UTC1h 0m
2026-07-11 CTV955 - Jul 11, 12:30 UTCJul 11, 13:50 UTC1h 20m
2026-07-11 CTV954 - Jul 11, 10:10 UTCJul 11, 11:10 UTC1h 0m
2026-07-11 CTV681 - Jul 11, 08:55 UTCJul 11, 09:10 UTC15m
2026-07-10 CTV680 - Jul 10, 21:55 UTCJul 10, 22:45 UTC50m
2026-07-10 CTV527 - Jul 10, 13:25 UTCJul 10, 14:00 UTC35m
2026-07-10 CTV526 - Jul 10, 10:15 UTCJul 10, 11:45 UTC1h 30m
2026-07-10 CTV423 - Jul 10, 08:45 UTCJul 10, 09:00 UTC15m
2026-07-10 CTV973 - Jul 10, 03:00 UTCJul 10, 03:15 UTC15m
2026-07-09 CTV483 - Jul 9, 23:20 UTCJul 9, 23:40 UTC20m
2026-07-08 CTV977 - Jul 8, 07:30 UTCJul 8, 07:45 UTC15m
2026-07-08 CTV976 - Jul 8, 05:20 UTCJul 8, 05:30 UTC10m
2026-07-08 CTV9971 - Jul 8, 03:10 UTCJul 8, 03:25 UTC15m
2026-07-07 CTV171 - Jul 7, 13:55 UTCJul 7, 14:35 UTC40m
2026-07-06 CTV172 HLP → SUB Jul 6, 13:35 UTCJul 6, 14:15 UTC40m
2026-07-06 CTV173 - Jul 6, 12:25 UTCJul 6, 12:50 UTC25m
2026-07-01 CTV9664 - Jul 1, 12:35 UTCJul 1, 13:20 UTC45m
2026-07-01 CTV959 - Jul 1, 11:20 UTCJul 1, 11:30 UTC10m
2026-07-01 CTV959 - Jul 1, 10:10 UTCJul 1, 10:50 UTC40m
2026-07-01 CTV958 - Jul 1, 07:50 UTCJul 1, 08:45 UTC55m
2026-07-01 CTV971 - Jul 1, 06:25 UTCJul 1, 06:40 UTC15m
2026-07-01 CTV970 - Jul 1, 03:50 UTCJul 1, 04:00 UTC10m
2026-06-30 CTV331 - Jun 30, 20:50 UTCJul 1, 02:35 UTC5h 45m
2026-06-30 CTV527 - Jun 30, 14:20 UTCJun 30, 14:35 UTC15m
2026-06-30 CTV527 - Jun 30, 13:15 UTCJun 30, 13:45 UTC30m
2026-06-30 CTV526 - Jun 30, 10:20 UTCJun 30, 11:45 UTC1h 25m
2026-06-30 CTV906 CGK → BKS Jun 30, 05:55 UTCJun 30, 08:45 UTC2h 50m
2026-06-30 CTV885 - Jun 30, 04:20 UTCJun 30, 04:35 UTC15m
2026-06-29 CTV884 - Jun 29, 23:49 UTCJun 30, 03:50 UTC4h 1m
2026-06-29 CTV917 - Jun 29, 09:50 UTCJun 29, 11:45 UTC1h 55m
2026-06-29 CTV918 - Jun 29, 06:09 UTCJun 29, 07:44 UTC1h 35m
2026-06-29 CTV9995 TKG → CGK Jun 29, 04:30 UTCJun 29, 05:04 UTC35m
2026-06-29 CTV9994 CGK → TKG Jun 29, 03:10 UTCJun 29, 03:34 UTC25m

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

Mode-S 8A0509 frequently asked

What is Mode-S code 8A0509?
8A0509 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GQK.
Where is Mode-S 8A0509 registered?
Mode-S code 8A0509 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A0509 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A0509, octal 42402411, decimal 9,045,257.
What flights does 8A0509 operate?
Mode-S 8A0509 has broadcast 20 distinct callsigns, including CTV975, CTV974, CTV913, CTV680, CTV503.