Apparatus

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sensors Mode-S transponder

8A021D

ICAO 24-bit transponder address · allocated to Indonesia

Currently assigned to PK-GFD · BOEING 737-800

Hex
8A021D
Octal
42401035
Decimal
9,044,509
Country
ID
Tail
PK-GFD
Type
B738
Broadcasting now · callsign GIA208 · 27,000 ft
Flights observed
126
Distinct callsigns
20
Country
ID
Last broadcast
1d ago

Current position

8A021D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 8A021D 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
GIA821 Garuda Indonesia 4 2026-05-11
GIA176 Garuda Indonesia 3 2026-05-23
GIA867 Garuda Indonesia 2 2026-04-29
GIA866 Garuda Indonesia 2 2026-04-29
GIA823 Garuda Indonesia 2 2026-04-30
GIA820 Garuda Indonesia 2 2026-05-11
GIA7744 Garuda Indonesia 2 2026-05-21
GIA7644 Garuda Indonesia 2 2026-05-21
GIA653 Garuda Indonesia 2 2026-05-03
GIA652 Garuda Indonesia 2 2026-05-02
GIA647 Garuda Indonesia 2 2026-05-01
GIA581 Garuda Indonesia 2 2026-05-27
GIA433 Garuda Indonesia 2 2026-05-07
GIA422 - 2 2026-04-14
GIA419 - 2 2026-04-14
GIA402 Garuda Indonesia 2 2026-05-21
GIA322 Garuda Indonesia 2 2026-04-24
GIA242 Garuda Indonesia 2 2026-05-24
GIA225 Garuda Indonesia 2 2026-05-23
GIA222 Garuda Indonesia 2 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 GIA175 PKU → CGK May 28, 04:00 UTCMay 28, 05:15 UTC1h 15m
2026-05-28 GIA172 CGK → PKU May 28, 01:05 UTCMay 28, 02:10 UTC1h 5m
2026-05-27 GIA581 AAP → CGK May 27, 06:04 UTCMay 27, 06:20 UTC15m
2026-05-26 GIA580 CGK → AAP May 26, 01:05 UTCMay 26, 01:14 UTC10m
2026-05-24 GIA242 CGK → SRG May 24, 06:45 UTCMay 24, 07:15 UTC30m
2026-05-24 GIA175 PKU → CGK May 24, 03:55 UTCMay 24, 05:15 UTC1h 20m
2026-05-24 GIA172 CGK → PKU May 24, 01:05 UTCMay 24, 02:10 UTC1h 5m
2026-05-23 GIA179 PKU → CGK May 23, 10:55 UTCMay 23, 12:20 UTC1h 25m
2026-05-23 GIA176 CGK → PKU May 23, 08:35 UTCMay 23, 09:40 UTC1h 5m
2026-05-23 GIA225 SOC → CGK May 23, 04:45 UTCMay 23, 05:20 UTC35m
2026-05-23 GIA222 CGK → SOC May 23, 02:25 UTCMay 23, 03:05 UTC39m
2026-05-22 GIA408 CGK → DPS May 22, 04:40 UTCMay 22, 05:05 UTC25m
2026-05-22 GIA153 BTH → CGK May 22, 02:05 UTCMay 22, 02:25 UTC20m
2026-05-21 GIA150 CGK → BTH May 21, 23:30 UTCMay 22, 00:25 UTC55m
2026-05-21 GIA7744 TKG → CGK May 21, 09:10 UTCMay 21, 09:25 UTC15m
2026-05-21 GIA7644 CGK → TKG May 21, 07:30 UTCMay 21, 07:40 UTC10m
2026-05-21 GIA402 CGK → DPS May 21, 00:10 UTCMay 21, 05:40 UTC5h 30m
2026-05-20 GIA228 CGK → SOC May 20, 07:10 UTCMay 20, 08:00 UTC50m
2026-05-20 GIA402 CGK → DPS May 20, 00:25 UTCMay 20, 01:05 UTC40m
2026-05-19 GIA075 TKG → CGK May 19, 07:30 UTCMay 19, 07:50 UTC20m
2026-05-19 GIA074 CGK → TKG May 19, 05:50 UTCMay 19, 06:00 UTC10m
2026-05-19 GIA563 BPN → CGK May 19, 03:40 UTCMay 19, 03:50 UTC10m
2026-05-18 GIA560 CGK → BPN May 18, 23:00 UTCMay 18, 23:10 UTC10m
2026-05-18 GIA317 SUB → CGK May 18, 09:00 UTCMay 18, 09:15 UTC15m
2026-05-18 GIA312 CGK → SUB May 18, 05:35 UTCMay 18, 06:10 UTC35m
2026-05-18 GIA205 YIA → CGK May 18, 03:15 UTCMay 18, 04:00 UTC45m
2026-05-18 GIA204 CGK → YIA May 18, 01:05 UTCMay 18, 01:35 UTC30m
2026-05-17 GIA410 CGK → DPS May 17, 07:45 UTCMay 17, 12:15 UTC4h 30m
2026-05-17 GIA109 PLM → CGK May 17, 06:00 UTCMay 17, 06:15 UTC15m
2026-05-17 GIA104 CGK → PLM May 17, 03:40 UTCMay 17, 03:50 UTC10m
2026-05-16 GIA550 - May 16, 08:41 UTCMay 16, 08:51 UTC10m
2026-05-16 GIA241 SRG → CGK May 16, 06:25 UTCMay 16, 06:35 UTC10m
2026-05-14 GIA530 CGK → BDJ May 14, 23:40 UTCMay 14, 23:50 UTC10m
2026-05-13 GIA829 SIN → CGK May 13, 05:45 UTCMay 13, 06:05 UTC20m
2026-05-13 GIA828 CGK → SIN May 13, 01:40 UTCMay 13, 05:10 UTC3h 30m
2026-05-12 GIA7744 TKG → CGK May 12, 09:10 UTCMay 12, 09:30 UTC20m
2026-05-12 GIA7644 CGK → TKG May 12, 07:30 UTCMay 12, 07:45 UTC15m
2026-05-12 GIA407 DPS → CGK May 12, 05:20 UTCMay 12, 05:30 UTC10m
2026-05-11 GIA821 KUL → CGK May 11, 06:40 UTCMay 11, 06:55 UTC15m
2026-05-11 GIA821 KUL → CGK May 11, 05:10 UTCMay 11, 06:05 UTC55m
2026-05-11 GIA820 CGK → KUL May 11, 01:50 UTCMay 11, 03:35 UTC1h 45m
2026-05-10 GIA509 PNK → CGK May 10, 11:15 UTCMay 10, 11:30 UTC15m
2026-05-10 GIA204 CGK → YIA May 10, 01:09 UTCMay 10, 04:09 UTC3h 0m
2026-05-09 GIA821 KUL → CGK May 9, 06:30 UTCMay 9, 06:45 UTC15m
2026-05-09 GIA821 KUL → CGK May 9, 05:05 UTCMay 9, 06:00 UTC55m
2026-05-09 GIA820 CGK → KUL May 9, 01:50 UTCMay 9, 03:35 UTC1h 45m
2026-05-08 GIA225 SOC → CGK May 8, 05:05 UTCMay 8, 05:14 UTC10m
2026-05-08 GIA222 CGK → SOC May 8, 02:14 UTCMay 8, 02:59 UTC45m
2026-05-07 GIA246 CGK → SRG May 7, 10:50 UTCMay 7, 11:20 UTC30m
2026-05-07 GIA433 LOP → CGK May 7, 04:30 UTCMay 7, 08:55 UTC4h 25m

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

Mode-S 8A021D frequently asked

What is Mode-S code 8A021D?
8A021D is an ICAO 24-bit transponder address. Allocated to Indonesia. Assigned to PK-GFD.
Where is Mode-S 8A021D registered?
Mode-S code 8A021D is allocated to Indonesia (ID). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 8A021D broadcasting right now?
Yes. Mode-S 8A021D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 8A021D, octal 42401035, decimal 9,044,509.
What flights does 8A021D operate?
Mode-S 8A021D has broadcast 20 distinct callsigns, including GIA821, GIA176, GIA867, GIA866, GIA823.