sensors Mode-S transponder
A55B7F
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N444WT · BOMBARDIER BD-700 Global 7000/7500 · operated by WHISKY TANGO LLC
- Hex
- A55B7F
- Octal
- 51255577
- Decimal
- 10,836,863
- Country
- US
- Tail
- N444WT
- Type
- GL7T
- Flights observed
- 60
- Distinct callsigns
- 1
- Country
- US
- Last broadcast
- 14h ago
Last known position
Country allocation
The ICAO 24-bit address A55B7F falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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 |
|---|---|---|---|
| N444WT | - | 60 | 2026-07-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | N444WT | - | Jul 17, 21:15 UTC | Jul 17, 22:49 UTC | 1h 35m |
| 2026-07-17 | N444WT | - | Jul 17, 18:00 UTC | Jul 17, 20:44 UTC | 2h 45m |
| 2026-07-16 | N444WT | - | Jul 16, 21:40 UTC | Jul 16, 22:30 UTC | 50m |
| 2026-07-16 | N444WT | - | Jul 16, 17:45 UTC | Jul 16, 20:19 UTC | 2h 35m |
| 2026-07-15 | N444WT | BUR → HSH | Jul 15, 00:15 UTC | Jul 15, 00:55 UTC | 40m |
| 2026-07-14 | N444WT | - | Jul 14, 20:45 UTC | Jul 14, 23:25 UTC | 2h 39m |
| 2026-07-13 | N444WT | - | Jul 13, 17:15 UTC | Jul 13, 17:50 UTC | 35m |
| 2026-07-13 | N444WT | - | Jul 13, 08:30 UTC | Jul 13, 16:45 UTC | 8h 15m |
| 2026-07-13 | N444WT | LEI → IBZ | Jul 13, 06:20 UTC | Jul 13, 07:05 UTC | 45m |
| 2026-07-09 | N444WT | IBZ → LEI | Jul 9, 19:50 UTC | Jul 9, 20:35 UTC | 45m |
| 2026-07-09 | N444WT | - | Jul 9, 17:45 UTC | Jul 9, 19:20 UTC | 1h 35m |
| 2026-07-08 | N444WT | - | Jul 8, 08:30 UTC | Jul 8, 10:15 UTC | 1h 45m |
| 2026-07-08 | N444WT | - | Jul 8, 06:20 UTC | Jul 8, 07:55 UTC | 1h 35m |
| 2026-07-06 | N444WT | VNY → LBG | Jul 6, 01:50 UTC | Jul 6, 11:30 UTC | 9h 40m |
| 2026-07-03 | N444WT | HIO → VNY | Jul 3, 19:20 UTC | Jul 3, 21:00 UTC | 1h 40m |
| 2026-06-16 | N444WT | - | Jun 16, 17:24 UTC | Jun 16, 17:35 UTC | 10m |
| 2026-06-16 | N444WT | IBZ → PDX | Jun 16, 06:20 UTC | Jun 16, 16:39 UTC | 10h 20m |
| 2026-06-15 | N444WT | - | Jun 15, 11:24 UTC | Jun 15, 12:10 UTC | 45m |
| 2026-06-14 | N444WT | - | Jun 14, 23:50 UTC | Jun 15, 10:45 UTC | 10h 55m |
| 2026-06-13 | N444WT | - | Jun 13, 22:55 UTC | Jun 13, 23:25 UTC | 30m |
| 2026-06-13 | N444WT | - | Jun 13, 20:45 UTC | Jun 13, 22:25 UTC | 1h 40m |
| 2026-06-10 | N444WT | - | Jun 10, 20:00 UTC | Jun 10, 21:30 UTC | 1h 30m |
| 2026-06-10 | N444WT | BUR → SAN | Jun 10, 18:45 UTC | Jun 10, 19:15 UTC | 30m |
| 2026-06-10 | N444WT | HIO → BUR | Jun 10, 14:05 UTC | Jun 10, 15:45 UTC | 1h 40m |
| 2026-06-06 | N444WT | - | Jun 6, 06:45 UTC | Jun 6, 08:25 UTC | 1h 40m |
| 2026-06-06 | N444WT | - | Jun 6, 05:35 UTC | Jun 6, 06:15 UTC | 40m |
| 2026-06-05 | N444WT | - | Jun 5, 21:40 UTC | Jun 6, 01:55 UTC | 4h 15m |
| 2026-06-05 | N444WT | - | Jun 5, 01:15 UTC | Jun 5, 05:05 UTC | 3h 50m |
| 2026-06-05 | N444WT | VNY → HSH | Jun 5, 00:10 UTC | Jun 5, 00:50 UTC | 40m |
| 2026-06-04 | N444WT | HIO → VNY | Jun 4, 19:05 UTC | Jun 4, 20:45 UTC | 1h 40m |
| 2026-06-01 | N444WT | - | Jun 1, 02:45 UTC | Jun 1, 04:30 UTC | 1h 45m |
| 2026-06-01 | N444WT | - | Jun 1, 01:45 UTC | Jun 1, 02:15 UTC | 30m |
| 2026-05-29 | N444WT | - | May 29, 16:00 UTC | May 29, 18:25 UTC | 2h 25m |
| 2026-05-28 | N444WT | - | May 28, 00:05 UTC | May 28, 02:35 UTC | 2h 30m |
| 2026-05-27 | N444WT | HIO → BUR | May 27, 18:25 UTC | May 27, 20:20 UTC | 1h 55m |
| 2026-05-23 | N444WT | VNY → HIO | May 23, 21:25 UTC | May 23, 23:10 UTC | 1h 45m |
| 2026-05-23 | N444WT | - | May 23, 19:25 UTC | May 23, 20:40 UTC | 1h 15m |
| 2026-05-23 | N444WT | - | May 23, 17:50 UTC | May 23, 18:00 UTC | 10m |
| 2026-05-21 | N444WT | - | May 21, 21:35 UTC | May 21, 21:50 UTC | 15m |
| 2026-05-21 | N444WT | - | May 21, 19:10 UTC | May 21, 20:15 UTC | 1h 5m |
| 2026-05-21 | N444WT | HIO → VNY | May 21, 16:05 UTC | May 21, 17:50 UTC | 1h 45m |
| 2026-05-18 | N444WT | - | May 18, 00:40 UTC | May 18, 02:35 UTC | 1h 55m |
| 2026-05-17 | N444WT | - | May 17, 22:45 UTC | May 18, 00:05 UTC | 1h 20m |
| 2026-05-14 | N444WT | - | May 14, 16:15 UTC | May 14, 17:05 UTC | 50m |
| 2026-05-13 | N444WT | HIO → VNY | May 13, 18:20 UTC | May 13, 20:05 UTC | 1h 45m |
| 2026-05-01 | N444WT | - | May 1, 01:45 UTC | May 1, 03:25 UTC | 1h 40m |
| 2026-05-01 | N444WT | - | May 1, 00:25 UTC | May 1, 01:10 UTC | 45m |
| 2026-04-30 | N444WT | IAD → HSH | Apr 30, 19:40 UTC | May 1, 00:00 UTC | 4h 20m |
| 2026-04-28 | N444WT | - | Apr 28, 21:40 UTC | Apr 28, 23:35 UTC | 1h 55m |
| 2026-04-26 | N444WT | - | Apr 26, 23:45 UTC | Apr 27, 01:40 UTC | 1h 55m |
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 N444WT page for operator, model, and routing details .