sensors Mode-S transponder
4006C1
ICAO 24-bit transponder address · allocated to United Kingdom
Currently assigned to G-VIIO · BOEING 777-200
- Hex
- 4006C1
- Octal
- 20003301
- Decimal
- 4,196,033
- Country
- GB
- Tail
- G-VIIO
- Type
- B772
- Flights observed
- 168
- Distinct callsigns
- 20
- Country
- GB
- Last broadcast
- Jul 26, 20:40 UTC
Last known position
Country allocation
The ICAO 24-bit address 4006C1 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 |
|---|---|---|---|
| BAW63H | - | 23 | 2026-07-14 |
| BAW43C | - | 22 | 2026-07-14 |
| BAW12J | British Airways | 17 | 2026-07-26 |
| BAW12TB | British Airways | 16 | 2026-07-25 |
| BAW17PA | British Airways | 10 | 2026-07-21 |
| BAW2279 | - | 8 | 2026-07-15 |
| BAW2278 | - | 8 | 2026-07-15 |
| BAW2238 | British Airways | 8 | 2026-07-23 |
| BAW2256 | - | 7 | 2026-07-21 |
| BAW2239 | British Airways | 7 | 2026-07-23 |
| BAW9VA | British Airways | 6 | 2026-07-24 |
| BAW22G | - | 6 | 2026-07-13 |
| BAW2204 | - | 4 | 2026-07-13 |
| BAW2160 | British Airways | 4 | 2026-07-20 |
| BAW2067 | - | 4 | 2026-07-16 |
| BAW5KW | - | 3 | 2026-06-25 |
| BAW2161 | British Airways | 3 | 2026-06-10 |
| BAW2158 | British Airways | 3 | 2026-07-25 |
| BAW9606 | British Airways | 1 | 2026-07-18 |
| BAW9605 | British Airways | 1 | 2026-07-18 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | BAW12J | LGW → TPA | Jul 26, 11:35 UTC | Jul 26, 20:30 UTC | 8h 55m |
| 2026-07-25 | BAW12TB | TPA → LGW | Jul 25, 23:05 UTC | Jul 26, 06:55 UTC | 7h 51m |
| 2026-07-25 | BAW12J | LGW → TPA | Jul 25, 12:30 UTC | Jul 25, 20:55 UTC | 8h 25m |
| 2026-07-25 | BAW2158 | GND → UVF | Jul 25, 08:05 UTC | Jul 25, 09:15 UTC | 1h 10m |
| 2026-07-25 | BAW2158 | GND → UVF | Jul 25, 01:10 UTC | Jul 25, 01:20 UTC | 10m |
| 2026-07-24 | BAW2158 | GND → UVF | Jul 24, 23:05 UTC | Jul 24, 23:25 UTC | 20m |
| 2026-07-24 | BAW2159 | UVF → TAB | Jul 24, 20:35 UTC | Jul 24, 20:55 UTC | 20m |
| 2026-07-24 | BAW9VA | LGW → UVF | Jul 24, 10:45 UTC | Jul 24, 18:20 UTC | 7h 35m |
| 2026-07-23 | BAW2238 | POS → LGW | Jul 23, 22:10 UTC | Jul 24, 05:55 UTC | 7h 45m |
| 2026-07-23 | BAW2239 | LGW → POS | Jul 23, 11:30 UTC | Jul 23, 19:20 UTC | 7h 50m |
| 2026-07-22 | BAW12TB | TPA → LGW | Jul 22, 23:00 UTC | Jul 23, 07:00 UTC | 8h 0m |
| 2026-07-22 | BAW12J | LGW → TPA | Jul 22, 11:40 UTC | Jul 22, 20:00 UTC | 8h 20m |
| 2026-07-21 | BAW2256 | - | Jul 21, 10:20 UTC | Jul 22, 05:25 UTC | 19h 5m |
| 2026-07-21 | BAW17PA | LGW → ANU | Jul 21, 09:30 UTC | Jul 22, 05:25 UTC | 19h 55m |
| 2026-07-20 | BAW2160 | ISB → LGW | Jul 20, 10:20 UTC | Jul 21, 05:25 UTC | 19h 5m |
| 2026-07-20 | BAW2160 | ISB → LGW | Jul 20, 10:00 UTC | Jul 21, 05:25 UTC | 19h 25m |
| 2026-07-19 | BAW2238 | POS → LGW | Jul 19, 20:00 UTC | Jul 20, 04:10 UTC | 8h 10m |
| 2026-07-19 | BAW2239 | LGW → POS | Jul 19, 09:30 UTC | Jul 19, 17:25 UTC | 7h 55m |
| 2026-07-18 | BAW9606 | MCO → LGW | Jul 18, 15:00 UTC | Jul 18, 16:10 UTC | 1h 10m |
| 2026-07-18 | BAW9605 | BWI → LHR | Jul 18, 00:04 UTC | Jul 18, 05:30 UTC | 5h 26m |
| 2026-07-17 | BAW9603 | ORD → LHR | Jul 17, 21:39 UTC | Jul 17, 22:05 UTC | 25m |
| 2026-07-17 | BAW9VA | LGW → UVF | Jul 17, 11:10 UTC | Jul 17, 12:00 UTC | 50m |
| 2026-07-16 | BAW2067 | LGW → LGW | Jul 16, 12:40 UTC | Jul 17, 03:25 UTC | 14h 45m |
| 2026-07-15 | BAW2278 | - | Jul 15, 23:00 UTC | Jul 16, 07:50 UTC | 8h 50m |
| 2026-07-15 | BAW2279 | LGW → YVR | Jul 15, 11:15 UTC | Jul 15, 20:15 UTC | 9h 0m |
| 2026-07-14 | BAW63H | - | Jul 14, 22:40 UTC | Jul 15, 07:10 UTC | 8h 29m |
| 2026-07-14 | BAW43C | LGW → MCO | Jul 14, 10:00 UTC | Jul 14, 18:30 UTC | 8h 30m |
| 2026-07-13 | BAW2204 | - | Jul 13, 10:20 UTC | Jul 14, 04:40 UTC | 18h 20m |
| 2026-07-13 | BAW22G | LGW → LGW | Jul 13, 09:25 UTC | Jul 14, 04:40 UTC | 19h 15m |
| 2026-07-12 | BAW63H | MCO → LGW | Jul 12, 22:30 UTC | Jul 13, 06:25 UTC | 7h 55m |
| 2026-07-12 | BAW43C | LGW → MCO | Jul 12, 10:15 UTC | Jul 12, 19:30 UTC | 9h 15m |
| 2026-07-11 | BAW9170 | - | Jul 11, 21:05 UTC | Jul 11, 21:20 UTC | 15m |
| 2026-06-28 | BAW9173 | LGW → LHR | Jun 28, 16:09 UTC | Jun 28, 16:25 UTC | 15m |
| 2026-06-28 | BAW12TB | TPA → LGW | Jun 28, 00:45 UTC | Jun 28, 08:39 UTC | 7h 55m |
| 2026-06-27 | BAW12J | LGW → TPA | Jun 27, 13:24 UTC | Jun 27, 22:29 UTC | 9h 5m |
| 2026-06-27 | BAW38W | MCO → LGW | Jun 27, 01:35 UTC | Jun 27, 09:19 UTC | 7h 45m |
| 2026-06-26 | BAW39D | LGW → MCO | Jun 26, 14:09 UTC | Jun 26, 22:55 UTC | 8h 45m |
| 2026-06-25 | BAW5KW | - | Jun 25, 20:45 UTC | Jun 26, 10:15 UTC | 13h 30m |
| 2026-06-25 | BAW9VA | LGW → LGW | Jun 25, 10:50 UTC | Jun 26, 10:15 UTC | 23h 25m |
| 2026-06-24 | BAW2204 | - | Jun 24, 12:20 UTC | Jun 25, 06:40 UTC | 18h 20m |
| 2026-06-24 | BAW2204 | LGW → LGW | Jun 24, 11:09 UTC | Jun 25, 06:40 UTC | 19h 30m |
| 2026-06-23 | BAW12TB | TPA → LGW | Jun 23, 23:05 UTC | Jun 24, 07:10 UTC | 8h 5m |
| 2026-06-23 | BAW12J | LGW → TPA | Jun 23, 11:59 UTC | Jun 23, 20:40 UTC | 8h 40m |
| 2026-06-22 | BAW12TB | TPA → LGW | Jun 22, 23:10 UTC | Jun 23, 07:09 UTC | 8h 0m |
| 2026-06-22 | BAW12J | LGW → TPA | Jun 22, 11:44 UTC | Jun 22, 20:49 UTC | 9h 5m |
| 2026-06-21 | BAW2238 | - | Jun 21, 10:19 UTC | Jun 22, 04:34 UTC | 18h 15m |
| 2026-06-21 | BAW2239 | LGW → LGW | Jun 21, 09:35 UTC | Jun 22, 04:34 UTC | 19h 0m |
| 2026-06-20 | BAW22G | LGW → LGW | Jun 20, 10:39 UTC | Jun 21, 05:30 UTC | 18h 50m |
| 2026-06-19 | BAW63H | MCO → LGW | Jun 19, 21:39 UTC | Jun 20, 05:29 UTC | 7h 50m |
| 2026-06-19 | BAW43C | LGW → MCO | Jun 19, 10:14 UTC | Jun 19, 19:25 UTC | 9h 10m |
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-VIIO page for operator, model, and routing details .