sensors Mode-S transponder
49D665
ICAO 24-bit transponder address · allocated to Czech Republic
- Hex
- 49D665
- Octal
- 22353145
- Decimal
- 4,839,013
- Country
- CZ
- Flights observed
- 61
- Distinct callsigns
- 5
- Country
- CZ
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address 49D665 falls within the block assigned to Czech Republic (CZ) by ICAO Annex 10, Volume III. Every aircraft registered in Czech Republic 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 5 distinct
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-27 | BOH213 | - | Jun 27, 16:00 UTC | Jun 27, 18:35 UTC | 2h 35m |
| 2026-06-27 | BOH212 | - | Jun 27, 12:45 UTC | Jun 27, 14:05 UTC | 1h 20m |
| 2026-06-27 | BOH211 | BRQ → BRQ | Jun 27, 08:49 UTC | Jun 27, 09:19 UTC | 30m |
| 2026-06-26 | BOH213 | JMK → BRQ | Jun 26, 14:05 UTC | Jun 26, 16:09 UTC | 2h 5m |
| 2026-06-26 | BOH212 | - | Jun 26, 09:30 UTC | Jun 26, 13:04 UTC | 3h 35m |
| 2026-06-26 | BOH211 | - | Jun 26, 07:14 UTC | Jun 26, 08:00 UTC | 45m |
| 2026-06-25 | BOH213 | - | Jun 25, 14:29 UTC | Jun 25, 15:24 UTC | 55m |
| 2026-06-25 | BOH212 | POZ → LTN | Jun 25, 10:45 UTC | Jun 25, 12:30 UTC | 1h 45m |
| 2026-06-25 | BOH211 | RTM → POZ | Jun 25, 06:20 UTC | Jun 25, 07:30 UTC | 1h 10m |
| 2026-06-22 | BOH212 | - | Jun 22, 13:29 UTC | Jun 22, 15:29 UTC | 2h 0m |
| 2026-06-22 | BOH211 | - | Jun 22, 10:15 UTC | Jun 22, 11:54 UTC | 1h 40m |
| 2026-06-21 | BOH211 | - | Jun 21, 11:24 UTC | Jun 21, 12:14 UTC | 50m |
| 2026-06-20 | BOH212 | - | Jun 20, 11:20 UTC | Jun 20, 12:09 UTC | 50m |
| 2026-06-20 | BOH211 | PRG → KLX | Jun 20, 07:59 UTC | Jun 20, 10:15 UTC | 2h 15m |
| 2026-06-19 | BOH213 | GWT → PRG | Jun 19, 15:09 UTC | Jun 19, 16:09 UTC | 1h 0m |
| 2026-06-19 | BOH212 | CGN → GWT | Jun 19, 13:24 UTC | Jun 19, 14:24 UTC | 1h 0m |
| 2026-06-19 | BOH211 | - | Jun 19, 09:40 UTC | Jun 19, 11:14 UTC | 1h 35m |
| 2026-06-18 | BOH213 | - | Jun 18, 18:30 UTC | Jun 18, 19:45 UTC | 1h 15m |
| 2026-06-18 | BOH212 | ZRH → BSL | Jun 18, 14:50 UTC | Jun 18, 15:05 UTC | 15m |
| 2026-06-18 | BOH211 | - | Jun 18, 12:30 UTC | Jun 18, 13:15 UTC | 45m |
| 2026-06-15 | BOH211 | - | Jun 15, 17:34 UTC | Jun 15, 21:20 UTC | 3h 45m |
| 2026-06-14 | BOH211 | - | Jun 14, 21:20 UTC | Jun 15, 21:14 UTC | 23h 55m |
| 2026-06-14 | BOH214 | - | Jun 14, 20:50 UTC | Jun 15, 19:14 UTC | 22h 24m |
| 2026-06-14 | BOH213 | - | Jun 14, 19:30 UTC | Jun 14, 19:55 UTC | 25m |
| 2026-06-14 | BOH212 | - | Jun 14, 16:05 UTC | Jun 14, 16:45 UTC | 40m |
| 2026-06-14 | BOH211 | - | Jun 14, 14:05 UTC | Jun 14, 15:20 UTC | 1h 15m |
| 2026-06-13 | BOH211 | - | Jun 13, 07:30 UTC | Jun 13, 09:55 UTC | 2h 25m |
| 2026-06-12 | BOH211 | MMX → KUN | Jun 12, 12:30 UTC | Jun 12, 13:30 UTC | 1h 0m |
| 2026-06-11 | BOH213 | - | Jun 11, 11:15 UTC | Jun 11, 11:25 UTC | 10m |
| 2026-06-11 | BOH212 | - | Jun 11, 08:40 UTC | Jun 11, 10:15 UTC | 1h 35m |
| 2026-06-11 | BOH211 | - | Jun 11, 06:20 UTC | Jun 11, 07:10 UTC | 50m |
| 2026-06-05 | BOH211 | ZRH → BRE | Jun 5, 08:35 UTC | Jun 5, 09:35 UTC | 1h 0m |
| 2026-06-04 | BOH212 | - | Jun 4, 12:05 UTC | Jun 4, 15:40 UTC | 3h 35m |
| 2026-06-03 | BOH211 | - | Jun 3, 09:50 UTC | Jun 3, 12:40 UTC | 2h 50m |
| 2026-06-02 | BOH211 | BCN → VLC | Jun 2, 14:30 UTC | Jun 2, 15:05 UTC | 35m |
| 2026-05-30 | BOH214 | BCN → BCN | May 30, 14:40 UTC | May 30, 15:20 UTC | 40m |
| 2026-05-30 | BOH213 | - | May 30, 11:10 UTC | May 30, 12:15 UTC | 1h 5m |
| 2026-05-30 | BOH212 | - | May 30, 09:50 UTC | May 30, 10:10 UTC | 20m |
| 2026-05-30 | BOH211 | - | May 30, 08:00 UTC | May 30, 08:25 UTC | 25m |
| 2026-05-29 | BOH213 | - | May 29, 09:50 UTC | May 29, 10:30 UTC | 40m |
| 2026-05-29 | BOH212 | - | May 29, 07:55 UTC | May 29, 09:05 UTC | 1h 10m |
| 2026-05-29 | BOH211 | - | May 29, 06:15 UTC | May 29, 07:20 UTC | 1h 5m |
| 2026-05-27 | BOH211 | IBZ → BIO | May 27, 07:45 UTC | May 27, 08:35 UTC | 50m |
| 2026-05-26 | BOH212 | BCN → IBZ | May 26, 13:00 UTC | May 26, 13:34 UTC | 35m |
| 2026-05-26 | BOH211 | IBZ → BCN | May 26, 10:50 UTC | May 26, 11:24 UTC | 35m |
| 2026-05-25 | BOH211 | - | May 25, 12:40 UTC | May 25, 14:30 UTC | 1h 50m |
| 2026-05-22 | BOH213 | - | May 22, 13:50 UTC | May 22, 18:30 UTC | 4h 40m |
| 2026-05-22 | BOH212 | - | May 22, 10:50 UTC | May 22, 12:30 UTC | 1h 40m |
| 2026-05-22 | BOH211 | - | May 22, 08:20 UTC | May 22, 09:30 UTC | 1h 10m |
| 2026-05-21 | BOH212 | - | May 21, 18:05 UTC | May 21, 19:10 UTC | 1h 5m |
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.