sensors Mode-S transponder
400771
ICAO 24-bit transponder address · allocated to United Kingdom
Currently assigned to G-VIIT · BOEING 777-200
- Hex
- 400771
- Octal
- 20003561
- Decimal
- 4,196,209
- Country
- GB
- Tail
- G-VIIT
- Type
- B772
- Flights observed
- 175
- Distinct callsigns
- 20
- Country
- GB
- Last broadcast
- Jul 26, 20:20 UTC
Last known position
Country allocation
The ICAO 24-bit address 400771 falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| BAW39D | British Airways | 14 | 2026-07-23 |
| BAW38W | British Airways | 13 | 2026-07-24 |
| BAW2279 | British Airways | 11 | 2026-06-24 |
| BAW2278 | British Airways | 11 | 2026-06-24 |
| BAW12J | - | 11 | 2026-07-15 |
| BAW5KW | - | 10 | 2026-06-27 |
| BAW2158 | - | 10 | 2026-07-15 |
| BAW12TB | - | 10 | 2026-07-15 |
| BAW9VA | - | 9 | 2026-07-14 |
| BAW63H | British Airways | 9 | 2026-07-19 |
| BAW43C | - | 9 | 2026-07-19 |
| BAW17PA | - | 8 | 2026-07-12 |
| BAW25K | - | 7 | 2026-07-04 |
| BAW2238 | British Airways | 7 | 2026-07-26 |
| BAW2067 | - | 7 | 2026-07-07 |
| BAW2239 | British Airways | 5 | 2026-07-26 |
| BAW2160 | - | 5 | 2026-07-17 |
| BAW2159 | - | 5 | 2026-07-14 |
| BAW22G | - | 3 | 2026-07-18 |
| BAW2204 | British Airways | 3 | 2026-07-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | BAW2238 | POS → LGW | Jul 26, 19:55 UTC | Jul 26, 20:20 UTC | 25m |
| 2026-07-26 | BAW2239 | LGW → POS | Jul 26, 08:55 UTC | Jul 26, 17:10 UTC | 8h 15m |
| 2026-07-25 | BAW2204 | PUJ → LGW | Jul 25, 10:40 UTC | Jul 26, 05:40 UTC | 19h 0m |
| 2026-07-24 | BAW38W | MCO → LGW | Jul 24, 05:05 UTC | Jul 24, 12:45 UTC | 7h 40m |
| 2026-07-23 | BAW39D | LGW → MCO | Jul 23, 18:40 UTC | Jul 24, 02:30 UTC | 7h 50m |
| 2026-07-19 | BAW63H | MCO → LGW | Jul 19, 22:25 UTC | Jul 20, 06:45 UTC | 8h 20m |
| 2026-07-19 | BAW43C | LGW → MCO | Jul 19, 11:30 UTC | Jul 19, 19:45 UTC | 8h 15m |
| 2026-07-18 | BAW22G | LGW → LGW | Jul 18, 10:40 UTC | Jul 19, 05:20 UTC | 18h 40m |
| 2026-07-17 | BAW2160 | LGW → LGW | Jul 17, 10:10 UTC | Jul 18, 04:10 UTC | 18h 1m |
| 2026-07-16 | BAW2238 | POS → LGW | Jul 16, 23:05 UTC | Jul 17, 06:54 UTC | 7h 50m |
| 2026-07-16 | BAW2239 | - | Jul 16, 12:09 UTC | Jul 16, 20:19 UTC | 8h 10m |
| 2026-07-15 | BAW12TB | TPA → LGW | Jul 15, 23:40 UTC | Jul 16, 08:05 UTC | 8h 25m |
| 2026-07-15 | BAW12J | LGW → TPA | Jul 15, 12:35 UTC | Jul 15, 21:20 UTC | 8h 45m |
| 2026-07-15 | BAW2158 | - | Jul 15, 08:00 UTC | Jul 15, 09:10 UTC | 1h 10m |
| 2026-07-15 | BAW2158 | - | Jul 15, 01:30 UTC | Jul 15, 01:40 UTC | 10m |
| 2026-07-14 | BAW2158 | - | Jul 14, 23:45 UTC | Jul 15, 00:00 UTC | 15m |
| 2026-07-14 | BAW2159 | - | Jul 14, 21:25 UTC | Jul 14, 21:45 UTC | 20m |
| 2026-07-14 | BAW9VA | - | Jul 14, 12:10 UTC | Jul 14, 13:10 UTC | 1h 0m |
| 2026-07-13 | BAW2160 | LGW → LGW | Jul 13, 10:35 UTC | Jul 14, 04:05 UTC | 17h 30m |
| 2026-07-12 | BAW17PA | LGW → LGW | Jul 12, 10:25 UTC | Jul 13, 04:00 UTC | 17h 35m |
| 2026-07-11 | BAW63H | MCO → LGW | Jul 11, 21:25 UTC | Jul 12, 05:20 UTC | 7h 55m |
| 2026-07-11 | BAW43C | - | Jul 11, 10:35 UTC | Jul 11, 19:15 UTC | 8h 40m |
| 2026-07-10 | BAW63H | MCO → LGW | Jul 10, 21:55 UTC | Jul 11, 05:55 UTC | 8h 0m |
| 2026-07-10 | BAW43C | LGW → MCO | Jul 10, 11:15 UTC | Jul 10, 19:45 UTC | 8h 30m |
| 2026-07-09 | BAW17PA | LGW → LGW | Jul 9, 11:15 UTC | Jul 10, 04:30 UTC | 17h 15m |
| 2026-07-08 | BAW63H | MCO → LGW | Jul 8, 21:45 UTC | Jul 9, 05:50 UTC | 8h 5m |
| 2026-07-08 | BAW43C | LGW → MCO | Jul 8, 10:10 UTC | Jul 8, 18:50 UTC | 8h 40m |
| 2026-07-07 | BAW2067 | LGW → LGW | Jul 7, 12:40 UTC | Jul 8, 03:55 UTC | 15h 15m |
| 2026-07-07 | BAW38W | MCO → LGW | Jul 7, 01:25 UTC | Jul 7, 09:35 UTC | 8h 10m |
| 2026-07-06 | BAW39D | LGW → MCO | Jul 6, 13:55 UTC | Jul 6, 22:20 UTC | 8h 25m |
| 2026-07-06 | BAW38W | MCO → LGW | Jul 6, 02:50 UTC | Jul 6, 10:35 UTC | 7h 45m |
| 2026-07-05 | BAW39D | LGW → MCO | Jul 5, 15:10 UTC | Jul 5, 23:35 UTC | 8h 25m |
| 2026-07-04 | BAW25K | - | Jul 4, 21:45 UTC | Jul 5, 12:10 UTC | 14h 25m |
| 2026-07-04 | BAW25K | - | Jul 4, 14:20 UTC | Jul 5, 12:10 UTC | 21h 50m |
| 2026-07-04 | BAW23K | LGW → LGW | Jul 4, 13:50 UTC | Jul 5, 12:10 UTC | 22h 20m |
| 2026-07-04 | BAW2158 | - | Jul 4, 07:50 UTC | Jul 4, 09:05 UTC | 1h 15m |
| 2026-07-04 | BAW2158 | - | Jul 4, 01:20 UTC | Jul 4, 01:30 UTC | 10m |
| 2026-07-03 | BAW2158 | - | Jul 3, 23:00 UTC | Jul 3, 23:25 UTC | 25m |
| 2026-07-03 | BAW2159 | - | Jul 3, 20:20 UTC | Jul 3, 20:45 UTC | 25m |
| 2026-07-03 | BAW9VA | - | Jul 3, 10:45 UTC | Jul 3, 11:45 UTC | 1h 0m |
| 2026-07-02 | BAW2238 | - | Jul 2, 12:20 UTC | Jul 3, 06:30 UTC | 18h 10m |
| 2026-07-02 | BAW2239 | LGW → LGW | Jul 2, 11:20 UTC | Jul 3, 06:30 UTC | 19h 10m |
| 2026-07-01 | BAW2160 | LGW → LGW | Jul 1, 10:05 UTC | Jul 2, 03:50 UTC | 17h 45m |
| 2026-06-30 | BAW2067 | LGW → LGW | Jun 30, 13:15 UTC | Jul 1, 04:10 UTC | 14h 55m |
| 2026-06-29 | BAW12TB | TPA → LGW | Jun 29, 23:09 UTC | Jun 30, 07:20 UTC | 8h 10m |
| 2026-06-29 | BAW12J | LGW → TPA | Jun 29, 12:05 UTC | Jun 29, 20:54 UTC | 8h 50m |
| 2026-06-29 | BAW12TB | TPA → LGW | Jun 29, 01:34 UTC | Jun 29, 09:34 UTC | 8h 0m |
| 2026-06-28 | BAW12J | LGW → TPA | Jun 28, 14:09 UTC | Jun 28, 23:20 UTC | 9h 10m |
| 2026-06-27 | BAW5KW | - | Jun 27, 14:20 UTC | Jun 28, 10:39 UTC | 20h 20m |
| 2026-06-27 | BAW9VA | LGW → LGW | Jun 27, 13:09 UTC | Jun 28, 10:39 UTC | 21h 30m |
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 G-VIIT page for operator, model, and routing details .