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 Jul 26, 11:50 UTC
Flights observed
438
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 11:50 UTC

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
CTV523 Escuela De Pilotos Are Aviacion 13 2026-07-25
CTV975 - 12 2026-07-13
CTV513 Escuela De Pilotos Are Aviacion 11 2026-07-25
CTV974 - 7 2026-07-13
CTV913 - 7 2026-06-26
CTV680 - 7 2026-07-10
CTV527 Escuela De Pilotos Are Aviacion 7 2026-07-20
CTV522 Escuela De Pilotos Are Aviacion 7 2026-07-24
CTV503 - 7 2026-06-21
CTV986 - 6 2026-06-25
CTV917 - 6 2026-06-29
CTV512 Escuela De Pilotos Are Aviacion 6 2026-07-25
CTV991 - 5 2026-06-22
CTV987 - 5 2026-06-25
CTV965 Escuela De Pilotos Are Aviacion 5 2026-06-15
CTV959 Escuela De Pilotos Are Aviacion 5 2026-07-26
CTV939 - 5 2026-06-22
CTV912 - 5 2026-06-26
CTV883 Escuela De Pilotos Are Aviacion 5 2026-05-21
CTV728 Escuela De Pilotos Are Aviacion 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CTV959 PDG → CGK Jul 26, 07:50 UTCJul 26, 11:50 UTC4h 0m
2026-07-26 CTV971 - Jul 26, 06:05 UTCJul 26, 06:30 UTC25m
2026-07-26 CTV970 - Jul 26, 03:40 UTCJul 26, 03:55 UTC15m
2026-07-25 CTV331 KDI → CGK Jul 25, 20:55 UTCJul 26, 02:35 UTC5h 40m
2026-07-25 CTV513 DMK → CGK Jul 25, 13:00 UTCJul 25, 13:20 UTC20m
2026-07-25 CTV513 DMK → CGK Jul 25, 10:10 UTCJul 25, 12:30 UTC2h 20m
2026-07-25 CTV512 CGK → DMK Jul 25, 05:40 UTCJul 25, 08:50 UTC3h 10m
2026-07-25 CTV523 SIN → CGK Jul 25, 03:35 UTCJul 25, 03:45 UTC10m
2026-07-25 CTV523 SIN → CGK Jul 25, 02:30 UTCJul 25, 02:55 UTC25m
2026-07-24 CTV522 CGK → SIN Jul 24, 23:35 UTCJul 25, 00:55 UTC1h 20m
2026-07-24 CTV513 DMK → CGK Jul 24, 13:15 UTCJul 24, 13:35 UTC20m
2026-07-24 CTV513 DMK → CGK Jul 24, 10:25 UTCJul 24, 12:45 UTC2h 20m
2026-07-24 CTV512 CGK → DMK Jul 24, 05:35 UTCJul 24, 08:50 UTC3h 15m
2026-07-24 CTV523 SIN → CGK Jul 24, 03:30 UTCJul 24, 03:50 UTC20m
2026-07-24 CTV523 SIN → CGK Jul 24, 02:20 UTCJul 24, 02:55 UTC35m
2026-07-23 CTV522 CGK → SIN Jul 23, 23:30 UTCJul 24, 00:50 UTC1h 20m
2026-07-23 CTV513 DMK → CGK Jul 23, 13:20 UTCJul 23, 13:40 UTC20m
2026-07-23 CTV513 DMK → CGK Jul 23, 10:30 UTCJul 23, 12:40 UTC2h 10m
2026-07-23 CTV512 CGK → DMK Jul 23, 06:30 UTCJul 23, 08:45 UTC2h 15m
2026-07-23 CTV512 CGK → DMK Jul 23, 05:25 UTCJul 23, 05:40 UTC15m
2026-07-23 CTV523 SIN → CGK Jul 23, 03:25 UTCJul 23, 03:35 UTC10m
2026-07-23 CTV523 SIN → CGK Jul 23, 02:20 UTCJul 23, 02:50 UTC30m
2026-07-22 CTV522 CGK → SIN Jul 22, 23:25 UTCJul 23, 00:45 UTC1h 20m
2026-07-22 CTV513 - Jul 22, 13:25 UTCJul 22, 13:35 UTC10m
2026-07-22 CTV513 - Jul 22, 11:30 UTCJul 22, 12:45 UTC1h 15m
2026-07-22 CTV523 SIN → CGK Jul 22, 03:40 UTCJul 22, 03:50 UTC10m
2026-07-22 CTV523 SIN → CGK Jul 22, 02:35 UTCJul 22, 03:05 UTC30m
2026-07-21 CTV522 CGK → SIN Jul 21, 23:30 UTCJul 22, 01:00 UTC1h 30m
2026-07-21 CTV513 - Jul 21, 13:10 UTCJul 21, 13:25 UTC15m
2026-07-21 CTV513 - Jul 21, 10:15 UTCJul 21, 12:30 UTC2h 15m
2026-07-21 CTV512 CGK → DMK Jul 21, 05:35 UTCJul 21, 08:45 UTC3h 10m
2026-07-21 CTV523 SIN → CGK Jul 21, 02:25 UTCJul 21, 03:45 UTC1h 20m
2026-07-20 CTV522 CGK → SIN Jul 20, 23:35 UTCJul 21, 00:55 UTC1h 20m
2026-07-20 CTV527 SIN → CGK Jul 20, 14:05 UTCJul 20, 14:25 UTC20m
2026-07-20 CTV527 SIN → CGK Jul 20, 13:05 UTCJul 20, 13:35 UTC30m
2026-07-20 CTV526 CGK → SIN Jul 20, 10:10 UTCJul 20, 11:30 UTC1h 20m
2026-07-20 CTV423 AAP → CGK Jul 20, 08:35 UTCJul 20, 08:55 UTC20m
2026-07-20 CTV422 - Jul 20, 04:20 UTCJul 20, 04:30 UTC10m
2026-07-20 CTV953 PDG → CGK Jul 20, 02:50 UTCJul 20, 03:05 UTC15m
2026-07-20 CTV953 PDG → CGK Jul 20, 01:45 UTCJul 20, 02:15 UTC30m
2026-07-19 CTV952 - Jul 19, 23:20 UTCJul 20, 00:20 UTC1h 0m
2026-07-19 CTV999 - Jul 19, 13:15 UTCJul 19, 13:35 UTC20m
2026-07-19 CTV998 - Jul 19, 11:40 UTCJul 19, 12:05 UTC25m
2026-07-19 CTV346 - Jul 19, 01:05 UTCJul 19, 10:25 UTC9h 20m
2026-07-18 CTV172 HLP → SUB Jul 18, 13:25 UTCJul 18, 23:50 UTC10h 25m
2026-07-18 CTV173 - Jul 18, 11:45 UTCJul 18, 12:35 UTC50m
2026-07-17 CTV728 CGK → SUB Jul 17, 14:20 UTCJul 17, 15:00 UTC40m
2026-07-17 CTV999 - Jul 17, 12:45 UTCJul 17, 13:20 UTC35m
2026-07-17 CTV998 - Jul 17, 11:20 UTCJul 17, 11:39 UTC20m
2026-07-17 CTV347 - Jul 17, 10:05 UTCJul 17, 10:15 UTC10m

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 Jul 26, 11:50 UTC.
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 CTV523, CTV975, CTV513, CTV974, CTV913.