sensors Mode-S transponder
406F77
ICAO 24-bit transponder address · allocated to United Kingdom
Currently assigned to G-ZBKK · BOEING 787-9 Dreamliner
- Hex
- 406F77
- Octal
- 20067567
- Decimal
- 4,222,839
- Country
- GB
- Tail
- G-ZBKK
- Type
- B789
- Flights observed
- 93
- Distinct callsigns
- 20
- Country
- GB
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 406F77 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 |
|---|---|---|---|
| BAW242 | British Airways | 13 | 2026-05-21 |
| BAW139 | British Airways | 12 | 2026-05-23 |
| BAW243 | British Airways | 11 | 2026-05-20 |
| BAW138 | British Airways | 11 | 2026-05-23 |
| BAW16 | British Airways | 8 | 2026-05-16 |
| BAW15 | British Airways | 6 | 2026-05-15 |
| BAW33 | British Airways | 4 | 2026-05-28 |
| BAW250 | British Airways | 4 | 2026-05-26 |
| BAW34 | British Airways | 3 | 2026-05-28 |
| BAW251 | British Airways | 2 | 2026-05-25 |
| BAW199 | British Airways | 2 | 2026-04-17 |
| BAW198 | British Airways | 2 | 2026-04-17 |
| BAW9ZY | British Airways | 1 | 2026-05-22 |
| BAW775 | British Airways | 1 | 2026-04-29 |
| BAW774 | British Airways | 1 | 2026-04-29 |
| BAW773 | British Airways | 1 | 2026-04-30 |
| BAW772 | British Airways | 1 | 2026-04-30 |
| BAW71K | British Airways | 1 | 2026-04-22 |
| BAW6 | British Airways | 1 | 2026-05-11 |
| BAW5CA | British Airways | 1 | 2026-05-22 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | BAW37J | LHR → JFK | May 29, 17:05 UTC | May 29, 23:45 UTC | 6h 40m |
| 2026-05-28 | BAW34 | LHR → KUL | May 28, 15:20 UTC | May 29, 04:35 UTC | 13h 15m |
| 2026-05-28 | BAW33 | LHR → KUL | May 28, 09:00 UTC | May 28, 09:20 UTC | 20m |
| 2026-05-27 | BAW33 | LHR → KUL | May 27, 21:15 UTC | May 28, 06:05 UTC | 8h 50m |
| 2026-05-26 | BAW250 | SCL → LHR | May 26, 21:20 UTC | May 27, 08:30 UTC | 11h 10m |
| 2026-05-26 | BAW250 | SCL → LHR | May 26, 19:30 UTC | May 26, 19:40 UTC | 10m |
| 2026-05-25 | BAW251 | LHR → SCL | May 25, 22:00 UTC | May 26, 10:05 UTC | 12h 5m |
| 2026-05-23 | BAW138 | BOM → LHR | May 23, 21:00 UTC | May 24, 06:20 UTC | 9h 20m |
| 2026-05-23 | BAW139 | LHR → BOM | May 23, 09:10 UTC | May 23, 17:50 UTC | 8h 40m |
| 2026-05-22 | BAW5CA | YYZ → LHR | May 22, 23:35 UTC | May 23, 05:55 UTC | 6h 19m |
| 2026-05-22 | BAW9ZY | LHR → YYZ | May 22, 14:25 UTC | May 22, 21:15 UTC | 6h 50m |
| 2026-05-21 | BAW242 | MEX → LHR | May 21, 04:35 UTC | May 21, 14:05 UTC | 9h 30m |
| 2026-05-20 | BAW243 | LHR → MEX | May 20, 15:05 UTC | May 21, 02:25 UTC | 11h 20m |
| 2026-05-19 | BAW34 | LHR → KUL | May 19, 19:20 UTC | May 20, 04:05 UTC | 8h 45m |
| 2026-05-19 | BAW34 | LHR → KUL | May 19, 15:20 UTC | May 19, 15:35 UTC | 15m |
| 2026-05-19 | BAW33 | LHR → KUL | May 19, 09:25 UTC | May 19, 09:45 UTC | 20m |
| 2026-05-18 | BAW33 | LHR → KUL | May 18, 21:25 UTC | May 19, 05:20 UTC | 7h 55m |
| 2026-05-16 | BAW16 | SIN → LHR | May 16, 15:16 UTC | May 17, 04:20 UTC | 13h 5m |
| 2026-05-16 | BAW16 | SIN → LHR | May 16, 04:45 UTC | May 16, 05:20 UTC | 35m |
| 2026-05-15 | BAW15 | SIN → SYD | May 15, 12:45 UTC | May 15, 19:40 UTC | 6h 54m |
| 2026-05-14 | BAW15 | SIN → SYD | May 14, 22:05 UTC | May 15, 10:15 UTC | 12h 10m |
| 2026-05-14 | BAW242 | MEX → LHR | May 14, 06:00 UTC | May 14, 15:50 UTC | 9h 50m |
| 2026-05-13 | BAW243 | LHR → MEX | May 13, 17:10 UTC | May 14, 03:50 UTC | 10h 40m |
| 2026-05-12 | BAW250 | SCL → LHR | May 12, 21:30 UTC | May 13, 08:50 UTC | 11h 20m |
| 2026-05-12 | BAW250 | SCL → LHR | May 12, 19:40 UTC | May 12, 19:50 UTC | 10m |
| 2026-05-11 | BAW251 | LHR → SCL | May 11, 21:15 UTC | May 11, 22:10 UTC | 55m |
| 2026-05-11 | BAW6 | HND → LHR | May 11, 04:20 UTC | May 11, 18:35 UTC | 14h 15m |
| 2026-05-10 | BAW5 | LHR → NRT | May 10, 12:49 UTC | May 11, 02:00 UTC | 13h 10m |
| 2026-05-08 | BAW138 | BOM → LHR | May 8, 22:30 UTC | May 9, 06:55 UTC | 8h 25m |
| 2026-05-08 | BAW139 | LHR → BOM | May 8, 19:05 UTC | May 8, 19:25 UTC | 20m |
| 2026-05-08 | BAW139 | LHR → BOM | May 8, 10:49 UTC | May 8, 18:25 UTC | 7h 35m |
| 2026-05-07 | BAW138 | BOM → LHR | May 7, 11:50 UTC | May 8, 06:14 UTC | 18h 25m |
| 2026-05-07 | BAW138 | BOM → LHR | May 7, 09:55 UTC | May 8, 06:14 UTC | 20h 19m |
| 2026-05-05 | BAW138 | BOM → LHR | May 5, 11:50 UTC | May 6, 06:10 UTC | 18h 20m |
| 2026-05-05 | BAW139 | LHR → BOM | May 5, 10:00 UTC | May 6, 06:10 UTC | 20h 10m |
| 2026-05-04 | BAW138 | BOM → LHR | May 4, 22:40 UTC | May 5, 07:05 UTC | 8h 25m |
| 2026-05-04 | BAW138 | BOM → LHR | May 4, 21:45 UTC | May 4, 21:55 UTC | 10m |
| 2026-05-04 | BAW139 | LHR → BOM | May 4, 18:05 UTC | May 4, 18:40 UTC | 36m |
| 2026-05-04 | BAW139 | LHR → BOM | May 4, 09:45 UTC | May 4, 17:25 UTC | 7h 40m |
| 2026-05-03 | BAW138 | BOM → LHR | May 3, 21:35 UTC | May 4, 06:10 UTC | 8h 35m |
| 2026-05-03 | BAW138 | BOM → LHR | May 3, 20:40 UTC | May 3, 20:49 UTC | 10m |
| 2026-05-03 | BAW139 | LHR → BOM | May 3, 18:05 UTC | May 3, 18:40 UTC | 35m |
| 2026-05-03 | BAW139 | LHR → BOM | May 3, 09:30 UTC | May 3, 17:24 UTC | 7h 55m |
| 2026-05-02 | BAW138 | BOM → LHR | May 2, 21:40 UTC | May 3, 06:00 UTC | 8h 19m |
| 2026-05-02 | BAW139 | LHR → BOM | May 2, 17:35 UTC | May 2, 18:05 UTC | 30m |
| 2026-05-02 | BAW139 | LHR → BOM | May 2, 09:30 UTC | May 2, 16:55 UTC | 7h 25m |
| 2026-05-01 | BAW461 | MAD → LHR | May 1, 16:30 UTC | May 1, 18:10 UTC | 1h 40m |
| 2026-05-01 | BAW46EZ | LHR → MAD | May 1, 12:50 UTC | May 1, 14:35 UTC | 1h 45m |
| 2026-04-30 | BAW773 | SKG → LHR | Apr 30, 14:35 UTC | Apr 30, 16:40 UTC | 2h 5m |
| 2026-04-30 | BAW772 | LHR → SKG | Apr 30, 11:00 UTC | Apr 30, 13:05 UTC | 2h 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.
Prefer a tail-number view? See the G-ZBKK page for operator, model, and routing details .