Apparatus

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sensors Mode-S transponder

8A0A61

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GUI · BOEING 737-800

Hex
8A0A61
Octal
42405141
Decimal
9,046,625
Country
ID
Tail
PK-GUI
Type
B738
No current signal · last broadcast Jul 26, 10:30 UTC
Flights observed
233
Distinct callsigns
20
Country
ID
Last broadcast
Jul 26, 10:30 UTC

Last known position

Most recent position reported by Mode-S 8A0A61.

Country allocation

The ICAO 24-bit address 8A0A61 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
GIA189 Garuda Indonesia 62 2026-07-26
GIA232 Garuda Indonesia 48 2026-07-26
GIA235 Garuda Indonesia 45 2026-07-26
GIA186 Garuda Indonesia 33 2026-07-26
GIA141 Garuda Indonesia 10 2026-06-04
GIA157 Garuda Indonesia 3 2026-05-26
GIA241 Garuda Indonesia 2 2026-06-10
GIA238 Garuda Indonesia 2 2026-06-10
GIA237 Garuda Indonesia 2 2026-05-29
GIA234 Garuda Indonesia 2 2026-05-29
GIA175 Garuda Indonesia 2 2026-05-10
GIA154 Garuda Indonesia 2 2026-05-26
GIA147 Garuda Indonesia 2 2026-05-20
GIA509 Garuda Indonesia 1 2026-05-21
GIA402 Garuda Indonesia 1 2026-05-16
GIA315 Garuda Indonesia 1 2026-05-10
GIA310 Garuda Indonesia 1 2026-05-10
GIA228 Garuda Indonesia 1 2026-04-29
GIA221 Garuda Indonesia 1 2026-04-29
GIA179 Garuda Indonesia 1 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GIA189 KNO → CGK Jul 26, 08:35 UTCJul 26, 10:30 UTC1h 55m
2026-07-26 GIA186 CGK → KNO Jul 26, 05:10 UTCJul 26, 06:40 UTC1h 31m
2026-07-26 GIA235 SRG → CGK Jul 26, 02:50 UTCJul 26, 03:25 UTC35m
2026-07-26 GIA232 CGK → SRG Jul 26, 00:50 UTCJul 26, 01:15 UTC25m
2026-07-25 GIA189 KNO → CGK Jul 25, 08:30 UTCJul 25, 10:15 UTC1h 45m
2026-07-25 GIA186 CGK → KNO Jul 25, 04:55 UTCJul 25, 06:30 UTC1h 35m
2026-07-25 GIA235 SRG → CGK Jul 25, 03:00 UTCJul 25, 03:30 UTC30m
2026-07-25 GIA232 CGK → SRG Jul 25, 00:55 UTCJul 25, 01:25 UTC30m
2026-07-24 GIA189 KNO → CGK Jul 24, 04:55 UTCJul 24, 10:25 UTC5h 30m
2026-07-24 GIA235 SRG → CGK Jul 24, 02:50 UTCJul 24, 03:25 UTC35m
2026-07-24 GIA232 CGK → SRG Jul 24, 00:50 UTCJul 24, 01:10 UTC20m
2026-07-23 GIA189 KNO → CGK Jul 23, 10:05 UTCJul 23, 10:25 UTC20m
2026-07-23 GIA189 KNO → CGK Jul 23, 08:30 UTCJul 23, 09:35 UTC1h 5m
2026-07-23 GIA186 CGK → KNO Jul 23, 05:05 UTCJul 23, 06:40 UTC1h 35m
2026-07-23 GIA235 SRG → CGK Jul 23, 03:20 UTCJul 23, 03:30 UTC10m
2026-07-23 GIA232 CGK → SRG Jul 23, 00:40 UTCJul 23, 00:55 UTC15m
2026-07-22 GIA186 CGK → KNO Jul 22, 05:05 UTCJul 22, 05:20 UTC15m
2026-07-22 GIA235 SRG → CGK Jul 22, 03:10 UTCJul 22, 03:35 UTC25m
2026-07-22 GIA232 CGK → SRG Jul 22, 00:55 UTCJul 22, 01:20 UTC25m
2026-07-21 GIA189 KNO → CGK Jul 21, 05:00 UTCJul 21, 10:15 UTC5h 15m
2026-07-21 GIA235 - Jul 21, 03:15 UTCJul 21, 03:30 UTC15m
2026-07-21 GIA232 - Jul 21, 00:55 UTCJul 21, 01:20 UTC25m
2026-06-10 GIA241 SRG → CGK Jun 10, 06:15 UTCJun 10, 06:50 UTC35m
2026-06-10 GIA238 CGK → SRG Jun 10, 04:15 UTCJun 10, 04:40 UTC25m
2026-06-09 GIA241 SRG → CGK Jun 9, 06:20 UTCJun 9, 06:55 UTC35m
2026-06-09 GIA238 CGK → SRG Jun 9, 04:10 UTCJun 9, 04:40 UTC30m
2026-06-08 GIA189 KNO → CGK Jun 8, 08:25 UTCJun 8, 10:15 UTC1h 50m
2026-06-08 GIA186 CGK → KNO Jun 8, 04:45 UTCJun 8, 06:15 UTC1h 30m
2026-06-08 GIA235 SRG → CGK Jun 8, 03:15 UTCJun 8, 03:30 UTC15m
2026-06-08 GIA232 CGK → SRG Jun 8, 00:55 UTCJun 8, 01:15 UTC20m
2026-06-07 GIA189 KNO → CGK Jun 7, 08:20 UTCJun 7, 10:25 UTC2h 5m
2026-06-07 GIA186 CGK → KNO Jun 7, 04:55 UTCJun 7, 06:25 UTC1h 30m
2026-06-07 GIA235 SRG → CGK Jun 7, 02:55 UTCJun 7, 03:25 UTC30m
2026-06-07 GIA232 CGK → SRG Jun 7, 00:49 UTCJun 7, 01:04 UTC15m
2026-06-06 GIA189 KNO → CGK Jun 6, 10:14 UTCJun 6, 10:34 UTC20m
2026-06-06 GIA189 KNO → CGK Jun 6, 08:35 UTCJun 6, 09:39 UTC1h 5m
2026-06-06 GIA186 CGK → KNO Jun 6, 05:00 UTCJun 6, 06:25 UTC1h 25m
2026-06-06 GIA235 SRG → CGK Jun 6, 03:05 UTCJun 6, 03:40 UTC35m
2026-06-06 GIA232 CGK → SRG Jun 6, 01:00 UTCJun 6, 01:25 UTC25m
2026-06-05 GIA189 KNO → CGK Jun 5, 08:30 UTCJun 5, 10:25 UTC1h 55m
2026-06-05 GIA186 CGK → KNO Jun 5, 05:00 UTCJun 5, 06:20 UTC1h 20m
2026-06-05 GIA235 SRG → CGK Jun 5, 03:10 UTCJun 5, 03:40 UTC30m
2026-06-05 GIA232 CGK → SRG Jun 5, 01:00 UTCJun 5, 01:25 UTC25m
2026-06-04 GIA141 BTJ → CGK Jun 4, 06:25 UTCJun 4, 06:45 UTC20m
2026-06-04 GIA140 CGK → BTJ Jun 4, 00:40 UTCJun 4, 05:55 UTC5h 15m
2026-06-03 GIA189 KNO → CGK Jun 3, 10:00 UTCJun 3, 10:20 UTC20m
2026-06-03 GIA186 CGK → KNO Jun 3, 04:55 UTCJun 3, 09:30 UTC4h 35m
2026-06-03 GIA235 SRG → CGK Jun 3, 03:20 UTCJun 3, 03:35 UTC15m
2026-06-03 GIA232 CGK → SRG Jun 3, 00:50 UTCJun 3, 01:05 UTC15m
2026-06-02 GIA235 SRG → CGK Jun 2, 02:50 UTCJun 2, 03:20 UTC30m

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

Mode-S 8A0A61 frequently asked

What is Mode-S code 8A0A61?
8A0A61 is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GUI.
Where is Mode-S 8A0A61 registered?
Mode-S code 8A0A61 is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A0A61 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A0A61, octal 42405141, decimal 9,046,625.
What flights does 8A0A61 operate?
Mode-S 8A0A61 has broadcast 20 distinct callsigns, including GIA189, GIA232, GIA235, GIA186, GIA141.