Apparatus

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sensors Mode-S transponder

8A04A9

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GQF · AIRBUS A-320

Hex
8A04A9
Octal
42402251
Decimal
9,045,161
Country
ID
Tail
PK-GQF
Type
A320
No current signal · last broadcast 1h ago
Flights observed
134
Distinct callsigns
20
Country
ID
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 8A04A9.

Country allocation

The ICAO 24-bit address 8A04A9 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
CTV969 Escuela De Pilotos Are Aviacion 7 2026-05-21
CTV436 Escuela De Pilotos Are Aviacion 5 2026-05-01
CTV994 Escuela De Pilotos Are Aviacion 4 2026-05-13
CTV991 Escuela De Pilotos Are Aviacion 4 2026-05-21
CTV990 Escuela De Pilotos Are Aviacion 4 2026-05-21
CTV968 Escuela De Pilotos Are Aviacion 4 2026-05-21
CTV967 Escuela De Pilotos Are Aviacion 4 2026-05-29
CTV936 Escuela De Pilotos Are Aviacion 4 2026-05-20
CTV979 Escuela De Pilotos Are Aviacion 3 2026-04-16
CTV977 Escuela De Pilotos Are Aviacion 3 2026-05-13
CTV939 Escuela De Pilotos Are Aviacion 3 2026-05-21
CTV726 Escuela De Pilotos Are Aviacion 3 2026-05-21
CTV681 Escuela De Pilotos Are Aviacion 3 2026-05-09
CTV680 Escuela De Pilotos Are Aviacion 3 2026-05-08
CTV995 Escuela De Pilotos Are Aviacion 2 2026-05-13
CTV980 Escuela De Pilotos Are Aviacion 2 2026-05-07
CTV976 Escuela De Pilotos Are Aviacion 2 2026-05-14
CTV966 Escuela De Pilotos Are Aviacion 2 2026-05-29
CTV946 Escuela De Pilotos Are Aviacion 2 2026-05-08
CTV938 Escuela De Pilotos Are Aviacion 2 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 CTV640 CGK → LOP May 30, 01:50 UTCMay 30, 02:15 UTC25m
2026-05-29 CTV937 PKU → CGK May 29, 23:20 UTCMay 30, 00:40 UTC1h 20m
2026-05-29 CTV938 CGK → PKU May 29, 11:00 UTCMay 29, 12:10 UTC1h 10m
2026-05-29 CTV967 DJB → CGK May 29, 09:55 UTCMay 29, 10:05 UTC10m
2026-05-29 CTV967 DJB → CGK May 29, 09:10 UTCMay 29, 09:25 UTC15m
2026-05-29 CTV966 CGK → DJB May 29, 07:00 UTCMay 29, 07:55 UTC55m
2026-05-29 CTV718 CGK → SUB May 29, 02:00 UTCMay 29, 02:25 UTC25m
2026-05-24 CTV172 HLP → SUB May 24, 13:55 UTCMay 24, 14:35 UTC40m
2026-05-23 CTV172 HLP → SUB May 23, 13:25 UTCMay 23, 13:50 UTC25m
2026-05-21 CTV726 CGK → SUB May 21, 12:20 UTCMay 21, 12:45 UTC25m
2026-05-21 CTV969 BTH → CGK May 21, 11:05 UTCMay 21, 11:20 UTC15m
2026-05-21 CTV969 BTH → CGK May 21, 10:15 UTCMay 21, 10:25 UTC10m
2026-05-21 CTV968 CGK → BTH May 21, 07:45 UTCMay 21, 08:45 UTC1h 0m
2026-05-21 CTV991 BKS → CGK May 21, 06:20 UTCMay 21, 06:30 UTC10m
2026-05-21 CTV990 CGK → BKS May 21, 03:45 UTCMay 21, 04:05 UTC20m
2026-05-21 CTV939 PKU → CGK May 21, 01:20 UTCMay 21, 02:40 UTC1h 20m
2026-05-20 CTV936 CGK → PKU May 20, 23:05 UTCMay 21, 00:10 UTC1h 5m
2026-05-20 - - May 20, 12:30 UTCMay 20, 12:40 UTC10m
2026-05-20 CTV998 CGK → TKG May 20, 10:35 UTCMay 20, 10:50 UTC15m
2026-05-15 CTV415 PNK → CGK May 15, 10:20 UTCMay 15, 10:30 UTC10m
2026-05-15 CTV414 CGK → PNK May 15, 07:10 UTCMay 15, 07:20 UTC10m
2026-05-15 CTV490 CGK → BDJ May 15, 02:20 UTCMay 15, 02:30 UTC10m
2026-05-14 CTV340 CGK → UPG May 14, 06:35 UTCMay 14, 07:00 UTC25m
2026-05-14 CTV976 CGK → TJQ May 14, 03:00 UTCMay 14, 03:10 UTC10m
2026-05-13 CTV602 CGK → KOE May 13, 19:15 UTCMay 13, 19:40 UTC25m
2026-05-13 CTV886 CGK → KNO May 13, 09:15 UTCMay 13, 13:20 UTC4h 5m
2026-05-13 CTV977 TJQ → CGK May 13, 07:25 UTCMay 13, 07:35 UTC10m
2026-05-13 CTV995 TKG → CGK May 13, 04:10 UTCMay 13, 04:20 UTC10m
2026-05-13 CTV994 CGK → TKG May 13, 02:30 UTCMay 13, 02:45 UTC15m
2026-05-12 CTV419 PNK → CGK May 12, 08:05 UTCMay 12, 08:15 UTC10m
2026-05-12 CTV739 - May 12, 03:30 UTCMay 12, 03:40 UTC10m
2026-05-10 CTV726 CGK → SUB May 10, 12:19 UTCMay 10, 12:40 UTC20m
2026-05-10 CTV969 BTH → CGK May 10, 11:00 UTCMay 10, 11:15 UTC15m
2026-05-10 CTV969 BTH → CGK May 10, 10:10 UTCMay 10, 10:24 UTC15m
2026-05-10 CTV968 CGK → BTH May 10, 07:45 UTCMay 10, 08:40 UTC55m
2026-05-10 CTV991 BKS → CGK May 10, 06:10 UTCMay 10, 06:25 UTC15m
2026-05-10 CTV990 CGK → BKS May 10, 03:40 UTCMay 10, 03:55 UTC15m
2026-05-10 CTV939 PKU → CGK May 10, 01:14 UTCMay 10, 02:34 UTC1h 20m
2026-05-09 CTV936 CGK → PKU May 9, 23:00 UTCMay 10, 00:09 UTC1h 10m
2026-05-09 CTV681 DPS → CGK May 9, 08:20 UTCMay 9, 08:30 UTC10m
2026-05-08 CTV680 CGK → DPS May 8, 22:05 UTCMay 8, 22:30 UTC25m
2026-05-08 CTV947 BTH → CGK May 8, 15:10 UTCMay 8, 16:05 UTC55m
2026-05-08 CTV946 CGK → BTH May 8, 12:34 UTCMay 8, 13:30 UTC55m
2026-05-08 CTV647 LOP → CGK May 8, 11:19 UTCMay 8, 11:34 UTC15m
2026-05-08 CTV646 CGK → LOP May 8, 07:24 UTCMay 8, 07:44 UTC20m
2026-05-08 CTV753 MLG → CGK May 8, 05:44 UTCMay 8, 05:59 UTC15m
2026-05-08 CTV752 CGK → MLG May 8, 02:39 UTCMay 8, 02:59 UTC20m
2026-05-07 CTV980 CGK → PLM May 7, 23:19 UTCMay 7, 23:34 UTC15m
2026-05-07 CTV503 KUL → CGK May 7, 14:00 UTCMay 7, 14:10 UTC10m
2026-05-07 CTV503 KUL → CGK May 7, 12:30 UTCMay 7, 13:20 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-GQF page for operator, model, and routing details .

Mode-S 8A04A9 frequently asked

What is Mode-S code 8A04A9?
8A04A9 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GQF.
Where is Mode-S 8A04A9 registered?
Mode-S code 8A04A9 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A04A9 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A04A9, octal 42402251, decimal 9,045,161.
What flights does 8A04A9 operate?
Mode-S 8A04A9 has broadcast 20 distinct callsigns, including CTV969, CTV436, CTV994, CTV991, CTV990.