sensors Mode-S transponder
8A0A1A
ICAO 24-bit transponder address · allocated to Indonesia
Currently assigned to PK-ALC · COMAC ARJ-21-700 Xiangfeng
- Hex
- 8A0A1A
- Octal
- 42405032
- Decimal
- 9,046,554
- Country
- ID
- Tail
- PK-ALC
- Type
- AJ27
- Flights observed
- 82
- Distinct callsigns
- 6
- Country
- ID
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address 8A0A1A 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 6 distinct
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | TNU176 | - | Jul 17, 18:25 UTC | Jul 17, 20:15 UTC | 1h 50m |
| 2026-07-17 | TNU175 | MDC → SZX | Jul 17, 16:19 UTC | Jul 17, 16:40 UTC | 20m |
| 2026-07-17 | TNU175 | MDC → SZX | Jul 17, 14:39 UTC | Jul 17, 15:05 UTC | 25m |
| 2026-07-14 | TNU176 | - | Jul 14, 17:55 UTC | Jul 14, 19:50 UTC | 1h 55m |
| 2026-07-14 | TNU175 | MDC → SZX | Jul 14, 15:40 UTC | Jul 14, 16:00 UTC | 20m |
| 2026-07-14 | TNU175 | MDC → SZX | Jul 14, 13:50 UTC | Jul 14, 14:35 UTC | 45m |
| 2026-07-13 | TNU175 | MDC → SZX | Jul 13, 19:05 UTC | Jul 14, 14:35 UTC | 19h 30m |
| 2026-07-13 | TNU168 | - | Jul 13, 17:55 UTC | Jul 14, 14:35 UTC | 20h 40m |
| 2026-07-13 | TNU167 | - | Jul 13, 15:15 UTC | Jul 13, 15:35 UTC | 20m |
| 2026-07-13 | TNU167 | - | Jul 13, 13:55 UTC | Jul 13, 14:25 UTC | 30m |
| 2026-07-08 | TNU168 | - | Jul 8, 17:30 UTC | Jul 8, 19:15 UTC | 1h 45m |
| 2026-07-08 | TNU167 | - | Jul 8, 15:25 UTC | Jul 8, 15:45 UTC | 20m |
| 2026-07-07 | TNU168 | - | Jul 7, 19:20 UTC | Jul 8, 14:25 UTC | 19h 5m |
| 2026-07-07 | TNU168 | - | Jul 7, 17:55 UTC | Jul 8, 14:25 UTC | 20h 30m |
| 2026-07-07 | TNU167 | - | Jul 7, 15:15 UTC | Jul 7, 15:35 UTC | 20m |
| 2026-07-07 | TNU167 | - | Jul 7, 13:50 UTC | Jul 7, 14:20 UTC | 30m |
| 2026-06-29 | TNU168 | - | Jun 29, 19:00 UTC | Jun 29, 19:29 UTC | 30m |
| 2026-06-29 | TNU168 | - | Jun 29, 17:34 UTC | Jun 29, 17:45 UTC | 10m |
| 2026-06-29 | TNU167 | - | Jun 29, 15:19 UTC | Jun 29, 15:45 UTC | 25m |
| 2026-06-29 | TNU167 | - | Jun 29, 13:49 UTC | Jun 29, 14:19 UTC | 30m |
| 2026-06-27 | TNU176 | SZX → MDC | Jun 27, 18:09 UTC | Jun 27, 20:09 UTC | 2h 0m |
| 2026-06-27 | TNU175 | MDC → SZX | Jun 27, 15:24 UTC | Jun 27, 16:04 UTC | 40m |
| 2026-06-27 | TNU175 | MDC → SZX | Jun 27, 14:00 UTC | Jun 27, 14:29 UTC | 30m |
| 2026-06-22 | TNU176 | SZX → MDC | Jun 22, 18:15 UTC | Jun 22, 20:14 UTC | 2h 0m |
| 2026-06-22 | TNU175 | MDC → SZX | Jun 22, 14:24 UTC | Jun 22, 14:49 UTC | 25m |
| 2026-06-07 | TNU9991 | - | Jun 7, 02:10 UTC | Jun 7, 02:19 UTC | 10m |
| 2026-06-02 | TNU176 | SZX → MDC | Jun 2, 17:50 UTC | Jun 2, 19:50 UTC | 2h 0m |
| 2026-06-02 | TNU175 | MDC → SZX | Jun 2, 15:55 UTC | Jun 2, 16:15 UTC | 20m |
| 2026-06-02 | TNU175 | MDC → SZX | Jun 2, 14:05 UTC | Jun 2, 14:40 UTC | 35m |
| 2026-05-30 | TNU176 | SZX → MDC | May 30, 17:30 UTC | May 30, 19:30 UTC | 2h 0m |
| 2026-05-30 | TNU175 | MDC → SZX | May 30, 13:50 UTC | May 30, 14:15 UTC | 25m |
| 2026-05-28 | TNU176 | SZX → MDC | May 28, 17:25 UTC | May 28, 19:25 UTC | 2h 0m |
| 2026-05-28 | TNU175 | MDC → SZX | May 28, 15:25 UTC | May 28, 16:05 UTC | 40m |
| 2026-05-28 | TNU175 | MDC → SZX | May 28, 14:00 UTC | May 28, 14:35 UTC | 35m |
| 2026-05-23 | TNU176 | SZX → MDC | May 23, 17:35 UTC | May 23, 19:25 UTC | 1h 50m |
| 2026-05-23 | TNU175 | MDC → SZX | May 23, 13:55 UTC | May 23, 14:20 UTC | 25m |
| 2026-05-21 | TNU176 | SZX → MDC | May 21, 18:30 UTC | May 21, 20:25 UTC | 1h 55m |
| 2026-05-21 | TNU175 | MDC → SZX | May 21, 15:35 UTC | May 21, 15:50 UTC | 15m |
| 2026-05-21 | TNU175 | MDC → SZX | May 21, 13:40 UTC | May 21, 14:05 UTC | 25m |
| 2026-05-19 | TNU176 | SZX → MDC | May 19, 17:35 UTC | May 19, 19:35 UTC | 2h 0m |
| 2026-05-19 | TNU175 | MDC → SZX | May 19, 15:50 UTC | May 19, 16:10 UTC | 20m |
| 2026-05-19 | TNU175 | MDC → SZX | May 19, 14:00 UTC | May 19, 14:30 UTC | 30m |
| 2026-05-17 | TNU9992 | - | May 17, 03:15 UTC | May 17, 03:55 UTC | 40m |
| 2026-05-17 | TNU9991 | - | May 17, 01:55 UTC | May 17, 02:05 UTC | 10m |
| 2026-05-14 | TNU176 | SZX → MDC | May 14, 17:25 UTC | May 14, 19:15 UTC | 1h 50m |
| 2026-05-14 | TNU175 | MDC → SZX | May 14, 15:35 UTC | May 14, 15:55 UTC | 20m |
| 2026-05-14 | TNU175 | MDC → SZX | May 14, 13:50 UTC | May 14, 14:30 UTC | 40m |
| 2026-05-12 | TNU176 | SZX → MDC | May 12, 17:15 UTC | May 12, 19:05 UTC | 1h 50m |
| 2026-05-12 | TNU175 | MDC → SZX | May 12, 15:30 UTC | May 12, 15:50 UTC | 20m |
| 2026-05-12 | TNU175 | MDC → SZX | May 12, 13:40 UTC | May 12, 14:15 UTC | 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-ALC page for operator, model, and routing details .