Apparatus

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sensors Mode-S transponder

8A0AC1

ICAO 24-bit transponder address · allocated to Indonesia

Hex
8A0AC1
Octal
42405301
Decimal
9,046,721
Country
ID
No current signal · last broadcast 10d ago
Flights observed
153
Distinct callsigns
9
Country
ID
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S 8A0AC1.

Country allocation

The ICAO 24-bit address 8A0AC1 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 9 distinct

Callsign Airline Flights Last seen
FHS103 - 35 2026-07-26
FHS102 - 31 2026-07-26
FHS101 - 23 2026-07-25
FHS104 - 21 2026-07-26
FHS106 - 18 2026-07-26
FHS105 - 16 2026-07-26
FHS132 - 4 2026-07-23
FHS131 - 4 2026-07-23
FHS141 - 1 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FHS106 - Jul 26, 09:10 UTCJul 26, 10:10 UTC1h 0m
2026-07-26 FHS105 - Jul 26, 07:05 UTCJul 26, 08:25 UTC1h 20m
2026-07-26 FHS104 - Jul 26, 04:50 UTCJul 26, 05:55 UTC1h 5m
2026-07-26 FHS103 - Jul 26, 02:55 UTCJul 26, 04:00 UTC1h 5m
2026-07-26 FHS102 - Jul 26, 00:55 UTCJul 26, 02:00 UTC1h 5m
2026-07-25 FHS101 - Jul 25, 23:15 UTCJul 25, 23:55 UTC40m
2026-07-25 FHS106 - Jul 25, 09:10 UTCJul 25, 10:10 UTC1h 0m
2026-07-25 FHS105 - Jul 25, 07:40 UTCJul 25, 08:15 UTC35m
2026-07-25 FHS104 - Jul 25, 04:55 UTCJul 25, 06:00 UTC1h 5m
2026-07-25 FHS103 - Jul 25, 02:55 UTCJul 25, 03:35 UTC40m
2026-07-25 FHS102 - Jul 25, 00:55 UTCJul 25, 02:00 UTC1h 5m
2026-07-24 FHS101 - Jul 24, 23:15 UTCJul 25, 00:15 UTC1h 0m
2026-07-24 FHS106 - Jul 24, 09:20 UTCJul 24, 10:30 UTC1h 10m
2026-07-24 FHS105 - Jul 24, 07:05 UTCJul 24, 08:15 UTC1h 10m
2026-07-24 FHS104 - Jul 24, 04:50 UTCJul 24, 05:55 UTC1h 5m
2026-07-24 FHS103 - Jul 24, 03:00 UTCJul 24, 04:00 UTC1h 0m
2026-07-24 FHS102 - Jul 24, 01:10 UTCJul 24, 02:15 UTC1h 5m
2026-07-23 FHS132 - Jul 23, 09:35 UTCJul 23, 10:25 UTC50m
2026-07-23 FHS131 - Jul 23, 05:20 UTCJul 23, 06:25 UTC1h 5m
2026-07-23 FHS103 - Jul 23, 03:05 UTCJul 23, 03:15 UTC10m
2026-07-23 FHS102 - Jul 23, 01:20 UTCJul 23, 02:30 UTC1h 10m
2026-07-22 FHS101 - Jul 22, 23:15 UTCJul 23, 00:00 UTC45m
2026-07-22 FHS104 - Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-22 FHS103 - Jul 22, 02:55 UTCJul 22, 03:35 UTC40m
2026-07-22 FHS102 - Jul 22, 01:05 UTCJul 22, 02:10 UTC1h 5m
2026-07-21 FHS132 - Jul 21, 09:20 UTCJul 21, 10:00 UTC40m
2026-07-21 FHS131 - Jul 21, 04:55 UTCJul 21, 06:00 UTC1h 5m
2026-07-21 FHS103 - Jul 21, 02:55 UTCJul 21, 03:40 UTC45m
2026-07-21 FHS102 - Jul 21, 01:10 UTCJul 21, 02:10 UTC1h 0m
2026-07-20 FHS101 - Jul 20, 23:15 UTCJul 20, 23:55 UTC39m
2026-07-20 FHS103 - Jul 20, 05:00 UTCJul 20, 06:00 UTC1h 0m
2026-07-20 FHS103 - Jul 20, 02:45 UTCJul 20, 03:30 UTC45m
2026-07-20 FHS102 - Jul 20, 01:00 UTCJul 20, 02:00 UTC1h 0m
2026-07-19 FHS101 - Jul 19, 23:15 UTCJul 19, 23:55 UTC40m
2026-07-19 FHS106 - Jul 19, 09:10 UTCJul 19, 10:10 UTC1h 0m
2026-07-19 FHS105 - Jul 19, 07:35 UTCJul 19, 08:15 UTC40m
2026-07-19 FHS104 - Jul 19, 05:00 UTCJul 19, 06:00 UTC1h 0m
2026-07-19 FHS103 - Jul 19, 02:55 UTCJul 19, 03:45 UTC50m
2026-07-19 FHS102 - Jul 19, 01:00 UTCJul 19, 02:05 UTC1h 5m
2026-07-18 FHS101 - Jul 18, 23:20 UTCJul 19, 00:05 UTC45m
2026-07-18 FHS106 - Jul 18, 09:00 UTCJul 18, 10:00 UTC1h 0m
2026-07-18 FHS105 - Jul 18, 06:50 UTCJul 18, 08:05 UTC1h 15m
2026-07-18 FHS104 - Jul 18, 05:20 UTCJul 18, 06:10 UTC50m
2026-07-18 FHS103 - Jul 18, 03:20 UTCJul 18, 04:30 UTC1h 10m
2026-07-18 FHS102 - Jul 18, 01:05 UTCJul 18, 02:14 UTC1h 10m
2026-07-17 FHS101 - Jul 17, 23:14 UTCJul 17, 23:55 UTC40m
2026-07-17 FHS106 - Jul 17, 09:50 UTCJul 17, 10:40 UTC50m
2026-07-17 FHS105 - Jul 17, 07:14 UTCJul 17, 08:20 UTC1h 5m
2026-07-17 FHS104 - Jul 17, 05:04 UTCJul 17, 06:00 UTC55m
2026-07-17 FHS103 - Jul 17, 02:54 UTCJul 17, 04:04 UTC1h 10m

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.

Mode-S 8A0AC1 frequently asked

What is Mode-S code 8A0AC1?
8A0AC1 is an ICAO 24-bit transponder address. Allocated to Indonesia.
Where is Mode-S 8A0AC1 registered?
Mode-S code 8A0AC1 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A0AC1 broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A0AC1, octal 42405301, decimal 9,046,721.
What flights does 8A0AC1 operate?
Mode-S 8A0AC1 has broadcast 9 distinct callsigns, including FHS103, FHS102, FHS101, FHS104, FHS106.