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sensors Mode-S transponder

8A0639

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-LUU · AIRBUS A-320

Hex
8A0639
Octal
42403071
Decimal
9,045,561
Country
ID
Tail
PK-LUU
Type
A320
Broadcasting now · callsign BTK6564 · 35,000 ft
Flights observed
277
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 18:10 UTC

Current position

8A0639 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 8A0639 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
BTK7311 - 11 2026-07-18
BTK7583 - 10 2026-07-19
BTK7581 - 7 2026-07-18
BTK7055 - 7 2026-07-14
BTK6526 - 6 2026-06-29
BTK6170 Batik Air 6 2026-07-26
BTK7511 - 5 2026-07-08
BTK7308 - 5 2026-07-15
BTK6296 Batik Air 5 2026-07-22
BTK7580 - 4 2026-07-18
BTK7309 - 4 2026-07-15
BTK6898 - 4 2026-06-20
BTK6566 Batik Air 4 2026-07-20
BTK6527 - 4 2026-06-29
BTK6430 Batik Air 4 2026-07-24
BTK7582 - 3 2026-07-16
BTK7521 - 3 2026-07-16
BTK7517 - 3 2026-07-09
BTK7515 Batik Air 3 2026-07-19
BTK7512 Batik Air 3 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BTK6170 CGK → AMQ Jul 26, 17:35 UTCJul 26, 18:10 UTC35m
2026-07-26 BTK6292 CGK → UPG Jul 26, 02:20 UTCJul 26, 11:55 UTC9h 36m
2026-07-26 BTK7369 SRG → CGK Jul 26, 00:40 UTCJul 26, 01:15 UTC35m
2026-07-25 BTK6362 CGK → SRG Jul 25, 12:55 UTCJul 25, 13:15 UTC20m
2026-07-25 BTK6205 PKN → CGK Jul 25, 10:45 UTCJul 25, 11:00 UTC15m
2026-07-25 BTK6204 CGK → PKN Jul 25, 08:00 UTCJul 25, 08:10 UTC10m
2026-07-25 BTK6711 TKG → CGK Jul 25, 05:55 UTCJul 25, 06:20 UTC25m
2026-07-25 BTK6710 CGK → TKG Jul 25, 04:25 UTCJul 25, 04:35 UTC10m
2026-07-25 BTK6431 BEJ → CGK Jul 25, 02:45 UTCJul 25, 02:55 UTC10m
2026-07-24 BTK6430 CGK → BEJ Jul 24, 21:55 UTCJul 24, 22:05 UTC10m
2026-07-24 BTK6887 KNO → CGK Jul 24, 11:35 UTCJul 24, 13:25 UTC1h 50m
2026-07-24 BTK6886 CGK → KNO Jul 24, 08:25 UTCJul 24, 10:00 UTC1h 35m
2026-07-24 BTK6658 CGK → LOP Jul 24, 03:00 UTCJul 24, 07:10 UTC4h 10m
2026-07-23 BTK8890 CGK → AMQ Jul 23, 18:00 UTCJul 24, 01:50 UTC7h 50m
2026-07-23 BTK6269 UPG → CGK Jul 23, 13:55 UTCJul 23, 14:30 UTC35m
2026-07-22 BTK6296 CGK → UPG Jul 22, 11:35 UTCJul 22, 11:55 UTC20m
2026-07-22 BTK6584 CGK → SUB Jul 22, 01:10 UTCJul 22, 01:50 UTC40m
2026-07-20 BTK6205 PKN → CGK Jul 20, 10:05 UTCJul 20, 10:20 UTC15m
2026-07-20 BTK6566 CGK → MLG Jul 20, 01:30 UTCJul 20, 05:20 UTC3h 50m
2026-07-19 BTK6391 SUB → CGK Jul 19, 13:30 UTCJul 19, 23:20 UTC9h 50m
2026-07-19 BTK7514 SUB → HLP Jul 19, 11:50 UTCJul 19, 12:10 UTC20m
2026-07-19 BTK7515 HLP → SUB Jul 19, 09:00 UTCJul 19, 09:30 UTC30m
2026-07-19 BTK7583 - Jul 19, 04:25 UTCJul 19, 07:45 UTC3h 20m
2026-07-18 BTK7581 - Jul 18, 23:55 UTCJul 19, 03:00 UTC3h 5m
2026-07-18 BTK7311 - Jul 18, 09:00 UTCJul 18, 12:55 UTC3h 55m
2026-07-18 BTK7583 - Jul 18, 04:30 UTCJul 18, 07:40 UTC3h 10m
2026-07-18 BTK7580 - Jul 18, 02:55 UTCJul 18, 03:20 UTC25m
2026-07-18 BTK7581 - Jul 18, 00:04 UTCJul 18, 00:35 UTC30m
2026-07-16 BTK7521 - Jul 16, 13:25 UTCJul 16, 13:34 UTC10m
2026-07-16 BTK7514 - Jul 16, 09:05 UTCJul 16, 12:09 UTC3h 5m
2026-07-16 BTK7582 - Jul 16, 07:45 UTCJul 16, 07:55 UTC10m
2026-07-16 BTK7583 - Jul 16, 04:50 UTCJul 16, 05:25 UTC35m
2026-07-16 BTK7580 - Jul 16, 03:35 UTCJul 16, 03:45 UTC10m
2026-07-15 BTK7581 - Jul 15, 23:55 UTCJul 16, 00:40 UTC45m
2026-07-15 BTK7502 - Jul 15, 09:35 UTCJul 15, 13:05 UTC3h 30m
2026-07-15 BTK7308 - Jul 15, 08:05 UTCJul 15, 08:25 UTC20m
2026-07-15 BTK7309 - Jul 15, 04:10 UTCJul 15, 04:45 UTC35m
2026-07-15 BTK7054 - Jul 15, 02:55 UTCJul 15, 03:05 UTC10m
2026-07-14 BTK7055 - Jul 14, 12:25 UTCJul 14, 12:40 UTC15m
2026-07-14 BTK7501 - Jul 14, 06:40 UTCJul 14, 09:50 UTC3h 10m
2026-07-14 BTK7516 - Jul 14, 04:45 UTCJul 14, 05:05 UTC20m
2026-07-14 BTK7513 - Jul 14, 01:55 UTCJul 14, 02:15 UTC20m
2026-07-13 BTK7311 - Jul 13, 09:00 UTCJul 13, 13:05 UTC4h 5m
2026-07-13 BTK7582 - Jul 13, 07:30 UTCJul 13, 07:40 UTC10m
2026-07-13 BTK7583 - Jul 13, 04:30 UTCJul 13, 05:10 UTC40m
2026-07-13 BTK7581 - Jul 13, 00:05 UTCJul 13, 03:20 UTC3h 15m
2026-07-12 BTK7310 - Jul 12, 09:05 UTCJul 12, 12:45 UTC3h 40m
2026-07-12 BTK7583 - Jul 12, 04:20 UTCJul 12, 07:35 UTC3h 15m
2026-07-12 BTK7581 - Jul 12, 00:01 UTCJul 12, 03:01 UTC3h 0m
2026-07-11 BTK7311 - Jul 11, 09:10 UTCJul 11, 09:50 UTC40m

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

Mode-S 8A0639 frequently asked

What is Mode-S code 8A0639?
8A0639 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-LUU.
Where is Mode-S 8A0639 registered?
Mode-S code 8A0639 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A0639 broadcasting right now?
Yes. Mode-S 8A0639 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A0639, octal 42403071, decimal 9,045,561.
What flights does 8A0639 operate?
Mode-S 8A0639 has broadcast 20 distinct callsigns, including BTK7311, BTK7583, BTK7581, BTK7055, BTK6526.