Apparatus

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sensors Mode-S transponder

8A0638

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-LUT · AIRBUS A-320

Hex
8A0638
Octal
42403070
Decimal
9,045,560
Country
ID
Tail
PK-LUT
Type
A320
No current signal · last broadcast 6h ago
Flights observed
115
Distinct callsigns
20
Country
ID
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 8A0638.

Country allocation

The ICAO 24-bit address 8A0638 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
BTK7797 Batik Air 4 2026-05-29
BTK7630 Batik Air 4 2026-04-27
BTK7581 Batik Air 4 2026-05-11
BTK6509 Batik Air 4 2026-05-06
BTK6508 Batik Air 4 2026-05-06
BTK6338 Batik Air 4 2026-04-24
BTK7631 Batik Air 3 2026-04-27
BTK6885 Batik Air 3 2026-05-28
BTK6884 Batik Air 3 2026-05-27
BTK6864 Batik Air 3 2026-05-22
BTK6805 Batik Air 3 2026-05-29
BTK6804 Batik Air 3 2026-05-29
BTK6565 Batik Air 3 2026-05-29
BTK6352 Batik Air 3 2026-05-02
BTK6339 Batik Air 3 2026-04-25
BTK6205 Batik Air 3 2026-05-14
BTK6204 Batik Air 3 2026-05-20
BTK7780 Batik Air 2 2026-05-18
BTK7582 Batik Air 2 2026-05-11
BTK7515 Batik Air 2 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BTK7797 CGK → SOQ May 29, 17:45 UTCMay 29, 18:15 UTC30m
2026-05-29 BTK6371 YIA → CGK May 29, 13:10 UTCMay 29, 14:00 UTC50m
2026-05-29 BTK6374 CGK → YIA May 29, 11:10 UTCMay 29, 11:35 UTC25m
2026-05-29 BTK6565 MLG → CGK May 29, 09:05 UTCMay 29, 09:15 UTC10m
2026-05-29 BTK6564 CGK → MLG May 29, 06:00 UTCMay 29, 06:40 UTC40m
2026-05-29 BTK6805 DJB → CGK May 29, 04:00 UTCMay 29, 04:50 UTC50m
2026-05-29 BTK6804 CGK → DJB May 29, 02:00 UTCMay 29, 02:50 UTC50m
2026-05-28 BTK6885 KNO → CGK May 28, 23:00 UTCMay 29, 00:40 UTC1h 40m
2026-05-28 BTK7146 SIN → KNO May 28, 06:15 UTCMay 28, 06:55 UTC40m
2026-05-27 BTK6884 CGK → KNO May 27, 12:05 UTCMay 28, 04:45 UTC16h 40m
2026-05-27 BTK6565 MLG → CGK May 27, 09:15 UTCMay 27, 09:30 UTC15m
2026-05-27 BTK6564 CGK → MLG May 27, 06:20 UTCMay 27, 07:05 UTC45m
2026-05-27 BTK6805 DJB → CGK May 27, 03:59 UTCMay 27, 04:55 UTC55m
2026-05-27 BTK6804 CGK → DJB May 27, 01:54 UTCMay 27, 02:49 UTC55m
2026-05-26 BTK6362 CGK → SRG May 26, 13:00 UTCMay 26, 13:10 UTC10m
2026-05-22 BTK6296 CGK → UPG May 22, 10:10 UTCMay 22, 10:45 UTC35m
2026-05-22 BTK6865 BTH → CGK May 22, 06:55 UTCMay 22, 07:05 UTC10m
2026-05-22 BTK6865 BTH → CGK May 22, 05:55 UTCMay 22, 06:20 UTC25m
2026-05-22 BTK6864 CGK → BTH May 22, 03:35 UTCMay 22, 04:25 UTC50m
2026-05-21 BTK6202 CGK → PKN May 21, 23:20 UTCMay 21, 23:30 UTC10m
2026-05-21 BTK6565 MLG → CGK May 21, 05:55 UTCMay 21, 09:15 UTC3h 20m
2026-05-21 BTK6805 DJB → CGK May 21, 04:05 UTCMay 21, 05:00 UTC55m
2026-05-21 BTK6804 CGK → DJB May 21, 02:00 UTCMay 21, 02:50 UTC50m
2026-05-21 BTK7369 SRG → CGK May 21, 00:20 UTCMay 21, 00:45 UTC25m
2026-05-20 BTK6362 CGK → SRG May 20, 12:40 UTCMay 20, 13:05 UTC25m
2026-05-20 BTK6204 CGK → PKN May 20, 07:15 UTCMay 20, 07:25 UTC10m
2026-05-20 BTK6243 GTO → CGK May 20, 03:15 UTCMay 20, 03:30 UTC15m
2026-05-19 BTK6242 CGK → GTO May 19, 21:10 UTCMay 19, 21:20 UTC10m
2026-05-19 BTK6143 UPG → CGK May 19, 10:30 UTCMay 19, 11:00 UTC30m
2026-05-18 BTK6266 CGK → UPG May 18, 07:35 UTCMay 18, 07:55 UTC20m
2026-05-18 BTK7780 SOQ → CGK May 18, 05:50 UTCMay 18, 06:05 UTC15m
2026-05-17 BTK7797 CGK → SOQ May 17, 17:40 UTCMay 17, 18:05 UTC25m
2026-05-17 BTK6269 UPG → CGK May 17, 13:55 UTCMay 17, 14:20 UTC25m
2026-05-16 BTK6296 CGK → UPG May 16, 10:01 UTCMay 16, 10:31 UTC30m
2026-05-15 BTK6864 CGK → BTH May 15, 03:25 UTCMay 15, 04:20 UTC55m
2026-05-14 BTK6885 KNO → CGK May 14, 22:55 UTCMay 15, 00:40 UTC1h 45m
2026-05-14 BTK6884 CGK → KNO May 14, 12:05 UTCMay 14, 13:35 UTC1h 30m
2026-05-14 BTK6205 PKN → CGK May 14, 10:05 UTCMay 14, 10:15 UTC10m
2026-05-14 BTK6204 CGK → PKN May 14, 07:20 UTCMay 14, 07:30 UTC10m
2026-05-14 BTK7010 KNO → HLP May 14, 03:45 UTCMay 14, 04:55 UTC1h 10m
2026-05-13 BTK6884 CGK → KNO May 13, 12:05 UTCMay 13, 13:40 UTC1h 35m
2026-05-13 BTK6345 YIA → CGK May 13, 06:20 UTCMay 13, 09:00 UTC2h 40m
2026-05-13 BTK6229 PNK → CGK May 13, 03:50 UTCMay 13, 04:05 UTC15m
2026-05-13 BTK6228 CGK → PNK May 13, 00:45 UTCMay 13, 00:55 UTC10m
2026-05-12 BTK7515 HLP → SUB May 12, 09:00 UTCMay 12, 09:25 UTC25m
2026-05-12 BTK7580 MLG → HLP May 12, 02:55 UTCMay 12, 03:20 UTC25m
2026-05-11 BTK7582 MLG → HLP May 11, 04:35 UTCMay 11, 07:35 UTC3h 0m
2026-05-11 BTK7581 HLP → MLG May 11, 00:10 UTCMay 11, 03:00 UTC2h 50m
2026-05-10 BTK7311 HLP → DPS May 10, 09:10 UTCMay 10, 13:05 UTC3h 55m
2026-05-10 BTK7582 MLG → HLP May 10, 04:25 UTCMay 10, 08:00 UTC3h 35m

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

Mode-S 8A0638 frequently asked

What is Mode-S code 8A0638?
8A0638 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-LUT.
Where is Mode-S 8A0638 registered?
Mode-S code 8A0638 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A0638 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A0638, octal 42403070, decimal 9,045,560.
What flights does 8A0638 operate?
Mode-S 8A0638 has broadcast 20 distinct callsigns, including BTK7797, BTK7630, BTK7581, BTK6509, BTK6508.