sensors Mode-S transponder
40749A
ICAO 24-bit transponder address · allocated to United Kingdom
Currently assigned to G-ZBKS · BOEING 787-9 Dreamliner
- Hex
- 40749A
- Octal
- 20072232
- Decimal
- 4,224,154
- Country
- GB
- Tail
- G-ZBKS
- Type
- B789
- Flights observed
- 122
- Distinct callsigns
- 20
- Country
- GB
- Last broadcast
- Jul 26, 16:30 UTC
Last known position
Country allocation
The ICAO 24-bit address 40749A 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 |
|---|---|---|---|
| BAW16 | - | 15 | 2026-07-18 |
| BAW15 | - | 11 | 2026-07-17 |
| BAW60 | - | 10 | 2026-07-10 |
| BAW243 | British Airways | 10 | 2026-06-25 |
| BAW34 | British Airways | 9 | 2026-07-25 |
| BAW242 | - | 9 | 2026-06-26 |
| BAW61 | British Airways | 7 | 2026-07-09 |
| BAW33 | British Airways | 7 | 2026-07-24 |
| BAW6 | British Airways | 5 | 2026-07-23 |
| BAW5 | British Airways | 5 | 2026-07-22 |
| BAW36 | - | 5 | 2026-07-09 |
| BAW81V | - | 3 | 2026-07-05 |
| BAW250 | British Airways | 3 | 2026-07-22 |
| BAW169 | British Airways | 3 | 2026-07-26 |
| BAW26E | - | 2 | 2026-07-04 |
| BAW251 | - | 2 | 2026-07-20 |
| BAW168 | - | 2 | 2026-07-06 |
| BAW9172 | British Airways | 1 | 2026-05-07 |
| BAW9171 | British Airways | 1 | 2026-06-13 |
| BAW70Q | - | 1 | 2026-06-23 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | BAW169 | LHR → PVG | Jul 26, 12:05 UTC | Jul 26, 16:30 UTC | 4h 25m |
| 2026-07-25 | BAW34 | LHR → KUL | Jul 25, 15:25 UTC | Jul 26, 04:05 UTC | 12h 40m |
| 2026-07-24 | BAW33 | LHR → KUL | Jul 24, 21:05 UTC | Jul 25, 09:05 UTC | 12h 0m |
| 2026-07-23 | BAW6 | HND → LHR | Jul 23, 04:45 UTC | Jul 23, 19:40 UTC | 14h 55m |
| 2026-07-22 | BAW5 | LHR → NRT | Jul 22, 12:35 UTC | Jul 23, 01:40 UTC | 13h 5m |
| 2026-07-22 | BAW250 | SCL → LHR | Jul 22, 11:10 UTC | Jul 22, 11:20 UTC | 10m |
| 2026-07-20 | BAW251 | - | Jul 20, 21:40 UTC | Jul 20, 22:30 UTC | 50m |
| 2026-07-19 | BAW138 | BOM → LHR | Jul 19, 20:35 UTC | Jul 20, 05:45 UTC | 9h 10m |
| 2026-07-19 | BAW139 | LHR → BOM | Jul 19, 09:15 UTC | Jul 19, 17:45 UTC | 8h 30m |
| 2026-07-18 | BAW16 | - | Jul 18, 15:20 UTC | Jul 19, 04:20 UTC | 13h 0m |
| 2026-07-18 | BAW16 | - | Jul 18, 12:40 UTC | Jul 18, 13:05 UTC | 25m |
| 2026-07-18 | BAW16 | - | Jul 18, 05:00 UTC | Jul 18, 05:55 UTC | 55m |
| 2026-07-17 | BAW15 | - | Jul 17, 13:50 UTC | Jul 17, 19:45 UTC | 5h 55m |
| 2026-07-16 | BAW15 | - | Jul 16, 21:40 UTC | Jul 17, 10:25 UTC | 12h 45m |
| 2026-07-15 | BAW6 | HND → LHR | Jul 15, 04:40 UTC | Jul 15, 18:45 UTC | 14h 5m |
| 2026-07-14 | BAW5 | - | Jul 14, 12:40 UTC | Jul 15, 01:30 UTC | 12h 49m |
| 2026-07-14 | BAW16 | - | Jul 14, 02:05 UTC | Jul 14, 06:05 UTC | 4h 0m |
| 2026-07-13 | BAW16 | - | Jul 13, 16:50 UTC | Jul 14, 02:00 UTC | 9h 10m |
| 2026-07-13 | - | - | Jul 13, 14:50 UTC | Jul 13, 15:00 UTC | 10m |
| 2026-07-13 | BAW16 | - | Jul 13, 07:35 UTC | Jul 13, 08:10 UTC | 35m |
| 2026-07-12 | BAW15 | - | Jul 12, 19:01 UTC | Jul 12, 19:40 UTC | 40m |
| 2026-07-12 | BAW15 | - | Jul 12, 12:45 UTC | Jul 12, 12:55 UTC | 10m |
| 2026-07-11 | BAW15 | - | Jul 11, 21:45 UTC | Jul 12, 10:20 UTC | 12h 35m |
| 2026-07-11 | BAW198 | - | Jul 11, 09:40 UTC | Jul 11, 16:40 UTC | 7h 0m |
| 2026-07-10 | BAW199 | - | Jul 10, 20:35 UTC | Jul 11, 04:50 UTC | 8h 15m |
| 2026-07-10 | BAW60 | - | Jul 10, 13:25 UTC | Jul 10, 17:00 UTC | 3h 35m |
| 2026-07-09 | BAW61 | LHR → MLE | Jul 9, 18:35 UTC | Jul 10, 13:20 UTC | 18h 45m |
| 2026-07-09 | BAW61 | LHR → MLE | Jul 9, 18:15 UTC | Jul 10, 13:20 UTC | 19h 5m |
| 2026-07-09 | BAW36 | - | Jul 9, 07:00 UTC | Jul 9, 10:45 UTC | 3h 45m |
| 2026-07-09 | BAW36 | - | Jul 9, 00:35 UTC | Jul 9, 06:25 UTC | 5h 50m |
| 2026-07-08 | BAW35 | - | Jul 8, 12:15 UTC | Jul 8, 16:30 UTC | 4h 15m |
| 2026-07-08 | BAW250 | - | Jul 8, 07:55 UTC | Jul 8, 09:15 UTC | 1h 20m |
| 2026-07-07 | BAW250 | - | Jul 7, 19:20 UTC | Jul 7, 19:30 UTC | 10m |
| 2026-07-06 | BAW251 | LHR → SCL | Jul 6, 21:35 UTC | Jul 6, 22:45 UTC | 1h 10m |
| 2026-07-06 | BAW168 | - | Jul 6, 04:45 UTC | Jul 6, 17:00 UTC | 12h 15m |
| 2026-07-05 | BAW168 | - | Jul 5, 14:55 UTC | Jul 6, 14:30 UTC | 23h 35m |
| 2026-07-05 | BAW169 | - | Jul 5, 12:35 UTC | Jul 6, 12:30 UTC | 23h 55m |
| 2026-07-05 | BAW169 | - | Jul 5, 11:30 UTC | Jul 6, 05:10 UTC | 17h 40m |
| 2026-07-05 | BAW81V | - | Jul 5, 03:45 UTC | Jul 5, 05:15 UTC | 1h 30m |
| 2026-07-04 | BAW81V | - | Jul 4, 20:45 UTC | Jul 5, 00:25 UTC | 3h 40m |
| 2026-07-04 | BAW26E | - | Jul 4, 08:45 UTC | Jul 4, 18:25 UTC | 9h 40m |
| 2026-07-03 | BAW81V | - | Jul 3, 20:45 UTC | Jul 4, 05:15 UTC | 8h 30m |
| 2026-07-03 | BAW26E | - | Jul 3, 08:35 UTC | Jul 3, 18:10 UTC | 9h 35m |
| 2026-07-02 | BAW16 | SIN → LHR | Jul 2, 15:05 UTC | Jul 3, 04:30 UTC | 13h 25m |
| 2026-07-02 | BAW16 | SIN → LHR | Jul 2, 12:45 UTC | Jul 2, 12:55 UTC | 10m |
| 2026-07-02 | BAW16 | SIN → LHR | Jul 2, 04:45 UTC | Jul 2, 05:15 UTC | 30m |
| 2026-07-01 | BAW15 | SIN → SYD | Jul 1, 12:45 UTC | Jul 1, 19:20 UTC | 6h 35m |
| 2026-06-30 | BAW15 | SIN → SYD | Jun 30, 21:35 UTC | Jul 1, 10:30 UTC | 12h 55m |
| 2026-06-26 | BAW242 | - | Jun 26, 04:39 UTC | Jun 26, 14:19 UTC | 9h 40m |
| 2026-06-25 | BAW243 | LHR → MEX | Jun 25, 14:29 UTC | Jun 26, 01:39 UTC | 11h 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-ZBKS page for operator, model, and routing details .