sensors Mode-S transponder
4B8399
ICAO 24-bit transponder address · allocated to Turkey
Currently assigned to TC-J8
- Hex
- 4B8399
- Octal
- 22701631
- Decimal
- 4,948,889
- Country
- TR
- Tail
- TC-J8
- Type
- BTB2
- Flights observed
- 30
- Distinct callsigns
- 1
- Country
- TR
- Last broadcast
- 17h ago
Last known position
Country allocation
The ICAO 24-bit address 4B8399 falls within the block assigned to Turkey (TR) by ICAO Annex 10, Volume III. Every aircraft registered in Turkey 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| 0000 | - | 30 | 2026-07-19 |
Recent flights last 30
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-19 | 0000 | - | Jul 19, 19:05 UTC | Jul 20, 07:15 UTC | 12h 10m |
| 2026-07-17 | 0000 | - | Jul 17, 19:40 UTC | Jul 18, 06:20 UTC | 10h 41m |
| 2026-07-16 | 0000 | - | Jul 16, 07:20 UTC | Jul 16, 18:55 UTC | 11h 35m |
| 2026-07-14 | 0000 | - | Jul 14, 20:50 UTC | Jul 15, 05:15 UTC | 8h 24m |
| 2026-07-12 | 0000 | - | Jul 12, 19:25 UTC | Jul 13, 08:01 UTC | 12h 35m |
| 2026-07-10 | 0000 | - | Jul 10, 21:10 UTC | Jul 11, 09:20 UTC | 12h 10m |
| 2026-07-06 | 0000 | - | Jul 6, 19:25 UTC | Jul 7, 08:15 UTC | 12h 50m |
| 2026-07-04 | 0000 | - | Jul 4, 21:10 UTC | Jul 5, 05:30 UTC | 8h 20m |
| 2026-07-03 | 0000 | - | Jul 3, 22:55 UTC | Jul 4, 10:10 UTC | 11h 15m |
| 2026-07-01 | 0000 | - | Jul 1, 19:50 UTC | Jul 2, 08:35 UTC | 12h 45m |
| 2026-06-30 | 0000 | - | Jun 30, 08:30 UTC | Jun 30, 09:15 UTC | 45m |
| 2026-06-29 | 0000 | - | Jun 29, 21:50 UTC | Jun 30, 02:05 UTC | 4h 16m |
| 2026-06-27 | 0000 | - | Jun 27, 21:44 UTC | Jun 28, 04:29 UTC | 6h 45m |
| 2026-06-23 | 0000 | - | Jun 23, 19:34 UTC | Jun 24, 08:24 UTC | 12h 50m |
| 2026-06-19 | 0000 | - | Jun 19, 22:49 UTC | Jun 20, 11:30 UTC | 12h 40m |
| 2026-06-15 | 0000 | - | Jun 15, 19:00 UTC | Jun 16, 09:10 UTC | 14h 10m |
| 2026-06-14 | 0000 | - | Jun 14, 20:10 UTC | Jun 15, 08:20 UTC | 12h 9m |
| 2026-06-03 | 0000 | - | Jun 3, 21:35 UTC | Jun 4, 08:15 UTC | 10h 40m |
| 2026-06-02 | 0000 | - | Jun 2, 19:15 UTC | Jun 3, 07:45 UTC | 12h 30m |
| 2026-05-26 | 0000 | - | May 26, 19:20 UTC | May 27, 04:39 UTC | 9h 20m |
| 2026-05-26 | 0000 | - | May 26, 17:04 UTC | May 26, 18:30 UTC | 1h 25m |
| 2026-05-18 | 0000 | - | May 18, 19:30 UTC | May 19, 07:20 UTC | 11h 50m |
| 2026-05-10 | 0000 | - | May 10, 18:55 UTC | May 11, 07:25 UTC | 12h 30m |
| 2026-04-29 | 0000 | - | Apr 29, 04:34 UTC | Apr 29, 06:35 UTC | 2h 0m |
| 2026-04-26 | 0000 | - | Apr 26, 06:25 UTC | Apr 26, 11:50 UTC | 5h 25m |
| 2026-04-21 | 0000 | - | Apr 21, 18:35 UTC | Apr 22, 08:45 UTC | 14h 10m |
| 2026-04-19 | 0000 | - | Apr 19, 18:40 UTC | Apr 20, 07:55 UTC | 13h 15m |
| 2026-04-13 | 0000 | - | Apr 13, 00:20 UTC | Apr 13, 00:55 UTC | 35m |
| 2026-04-12 | 0000 | - | Apr 12, 23:55 UTC | Apr 13, 00:55 UTC | 1h 0m |
| 2026-04-12 | 0000 | - | Apr 12, 17:15 UTC | Apr 12, 20:15 UTC | 3h 0m |
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 TC-J8 page for operator, model, and routing details .