sensors Mode-S transponder
8A03A5
ICAO 24-bit transponder address · allocated to Indonesia
Currently assigned to PK-GIA · BOEING 777-300ER
- Hex
- 8A03A5
- Octal
- 42401645
- Decimal
- 9,044,901
- Country
- ID
- Tail
- PK-GIA
- Type
- B77W
- Flights observed
- 6
- Distinct callsigns
- 4
- Country
- ID
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 8A03A5 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 4 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| GIA7402 | Garuda Indonesia | 2 | 2026-04-23 |
| GIA3501 | - | 2 | 2026-04-23 |
| GIA3601 | - | 1 | 2026-04-24 |
| GIA3502 | - | 1 | 2026-04-24 |
Recent flights last 6
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-04-24 | GIA3502 | - | Apr 24, 06:20 UTC | Apr 25, 01:45 UTC | 19h 25m |
| 2026-04-24 | GIA3601 | - | Apr 24, 01:20 UTC | Apr 25, 01:15 UTC | 23h 55m |
| 2026-04-23 | GIA3501 | - | Apr 23, 21:15 UTC | Apr 24, 09:55 UTC | 12h 40m |
| 2026-04-23 | GIA3501 | - | Apr 23, 04:05 UTC | Apr 24, 01:30 UTC | 21h 25m |
| 2026-04-23 | GIA7402 | CGK → TKG | Apr 23, 00:55 UTC | Apr 23, 21:40 UTC | 20h 45m |
| 2026-04-22 | GIA7402 | CGK → TKG | Apr 22, 16:10 UTC | Apr 23, 04:45 UTC | 12h 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-GIA page for operator, model, and routing details .