sensors Mode-S transponder
40749B
ICAO 24-bit transponder address · allocated to United Kingdom
Currently assigned to G-ZBKR · BOEING 787-9 Dreamliner
- Hex
- 40749B
- Octal
- 20072233
- Decimal
- 4,224,155
- Country
- GB
- Tail
- G-ZBKR
- Type
- B789
- Flights observed
- 167
- Distinct callsigns
- 20
- Country
- GB
- Last broadcast
- 5h ago
Last known position
Country allocation
The ICAO 24-bit address 40749B 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 |
|---|---|---|---|
| BAW168 | - | 17 | 2026-07-08 |
| BAW16 | - | 17 | 2026-07-10 |
| BAW15 | - | 17 | 2026-07-09 |
| BAW169 | - | 12 | 2026-07-07 |
| BAW34 | - | 10 | 2026-06-27 |
| BAW250 | - | 10 | 2026-07-01 |
| BAW33 | British Airways | 7 | 2026-06-26 |
| BAW251 | British Airways | 7 | 2026-06-29 |
| BAW271 | British Airways | 6 | 2026-06-20 |
| BAW270 | - | 6 | 2026-06-21 |
| BAW243 | British Airways | 6 | 2026-06-28 |
| BAW242 | - | 5 | 2026-06-29 |
| BAW60 | British Airways | 3 | 2026-05-31 |
| BAW5 | - | 3 | 2026-07-11 |
| BAW139 | - | 3 | 2026-07-06 |
| BAW138 | - | 3 | 2026-07-06 |
| BAW9EW | British Airways | 2 | 2026-05-29 |
| BAW99 | British Airways | 2 | 2026-05-06 |
| BAW98T | British Airways | 2 | 2026-05-07 |
| BAW70Q | British Airways | 2 | 2026-05-16 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | BAW9173 | - | Jul 14, 15:45 UTC | Jul 14, 21:25 UTC | 5h 40m |
| 2026-07-11 | BAW5 | - | Jul 11, 12:35 UTC | Jul 11, 16:50 UTC | 4h 15m |
| 2026-07-10 | BAW16 | - | Jul 10, 14:55 UTC | Jul 11, 03:55 UTC | 13h 0m |
| 2026-07-10 | BAW16 | - | Jul 10, 12:25 UTC | Jul 10, 12:35 UTC | 10m |
| 2026-07-10 | BAW16 | - | Jul 10, 04:55 UTC | Jul 10, 05:30 UTC | 35m |
| 2026-07-09 | BAW15 | - | Jul 9, 19:00 UTC | Jul 9, 19:40 UTC | 40m |
| 2026-07-08 | BAW15 | - | Jul 8, 21:25 UTC | Jul 9, 10:25 UTC | 13h 0m |
| 2026-07-08 | BAW168 | - | Jul 8, 04:50 UTC | Jul 8, 17:25 UTC | 12h 35m |
| 2026-07-07 | BAW168 | - | Jul 7, 15:45 UTC | Jul 8, 13:35 UTC | 21h 50m |
| 2026-07-07 | BAW169 | - | Jul 7, 12:50 UTC | Jul 8, 12:45 UTC | 23h 55m |
| 2026-07-07 | BAW169 | - | Jul 7, 11:45 UTC | Jul 8, 05:05 UTC | 17h 20m |
| 2026-07-06 | BAW138 | - | Jul 6, 20:50 UTC | Jul 7, 06:25 UTC | 9h 35m |
| 2026-07-06 | BAW139 | - | Jul 6, 10:10 UTC | Jul 6, 18:50 UTC | 8h 40m |
| 2026-07-05 | BAW81V | - | Jul 5, 20:45 UTC | Jul 6, 05:20 UTC | 8h 35m |
| 2026-07-05 | BAW26E | - | Jul 5, 08:30 UTC | Jul 5, 17:55 UTC | 9h 25m |
| 2026-07-04 | BAW16 | SIN → LHR | Jul 4, 15:10 UTC | Jul 5, 04:20 UTC | 13h 10m |
| 2026-07-04 | BAW16 | SIN → LHR | Jul 4, 12:25 UTC | Jul 4, 12:40 UTC | 15m |
| 2026-07-04 | BAW16 | SIN → LHR | Jul 4, 04:45 UTC | Jul 4, 05:20 UTC | 35m |
| 2026-07-03 | BAW15 | SIN → SYD | Jul 3, 18:45 UTC | Jul 3, 19:25 UTC | 40m |
| 2026-07-02 | BAW15 | SIN → SYD | Jul 2, 21:20 UTC | Jul 3, 09:55 UTC | 12h 35m |
| 2026-07-02 | BAW198 | - | Jul 2, 07:50 UTC | Jul 2, 17:00 UTC | 9h 10m |
| 2026-07-01 | BAW199 | - | Jul 1, 20:30 UTC | Jul 2, 05:20 UTC | 8h 50m |
| 2026-07-01 | BAW250 | - | Jul 1, 07:45 UTC | Jul 1, 08:55 UTC | 1h 10m |
| 2026-06-30 | BAW250 | - | Jun 30, 19:20 UTC | Jun 30, 19:30 UTC | 10m |
| 2026-06-29 | BAW251 | LHR → SCL | Jun 29, 21:30 UTC | Jun 29, 22:24 UTC | 55m |
| 2026-06-29 | BAW242 | - | Jun 29, 04:39 UTC | Jun 29, 14:29 UTC | 9h 50m |
| 2026-06-28 | BAW243 | LHR → MEX | Jun 28, 14:45 UTC | Jun 29, 02:00 UTC | 11h 15m |
| 2026-06-27 | BAW34 | - | Jun 27, 15:14 UTC | Jun 28, 04:15 UTC | 13h 0m |
| 2026-06-26 | BAW33 | LHR → KUL | Jun 26, 21:04 UTC | Jun 27, 09:24 UTC | 12h 20m |
| 2026-06-26 | BAW168 | - | Jun 26, 04:59 UTC | Jun 26, 17:25 UTC | 12h 25m |
| 2026-06-25 | BAW168 | - | Jun 25, 19:09 UTC | Jun 26, 17:25 UTC | 22h 15m |
| 2026-06-25 | BAW168 | - | Jun 25, 14:50 UTC | Jun 26, 14:44 UTC | 23h 55m |
| 2026-06-25 | BAW169 | - | Jun 25, 12:50 UTC | Jun 26, 12:44 UTC | 23h 55m |
| 2026-06-25 | BAW169 | - | Jun 25, 12:04 UTC | Jun 26, 05:19 UTC | 17h 15m |
| 2026-06-24 | BAW16 | SIN → LHR | Jun 24, 15:29 UTC | Jun 25, 04:45 UTC | 13h 15m |
| 2026-06-24 | BAW16 | SIN → LHR | Jun 24, 04:55 UTC | Jun 24, 05:54 UTC | 1h 0m |
| 2026-06-23 | BAW15 | SIN → SYD | Jun 23, 12:35 UTC | Jun 23, 19:10 UTC | 6h 35m |
| 2026-06-22 | BAW15 | SIN → SYD | Jun 22, 21:25 UTC | Jun 23, 10:10 UTC | 12h 45m |
| 2026-06-22 | BAW186 | AUS → LHR | Jun 22, 03:50 UTC | Jun 22, 12:30 UTC | 8h 40m |
| 2026-06-21 | BAW187 | - | Jun 21, 15:40 UTC | Jun 22, 01:19 UTC | 9h 40m |
| 2026-06-21 | BAW270 | LAS → LHR | Jun 21, 00:34 UTC | Jun 21, 09:55 UTC | 9h 20m |
| 2026-06-20 | BAW271 | LHR → LAS | Jun 20, 11:44 UTC | Jun 20, 20:45 UTC | 9h 0m |
| 2026-06-20 | BAW250 | - | Jun 20, 05:49 UTC | Jun 20, 08:49 UTC | 3h 0m |
| 2026-06-18 | BAW251 | LHR → SCL | Jun 18, 21:20 UTC | Jun 19, 00:29 UTC | 3h 9m |
| 2026-06-17 | BAW34 | - | Jun 17, 15:15 UTC | Jun 18, 04:10 UTC | 12h 55m |
| 2026-06-16 | BAW33 | LHR → KUL | Jun 16, 20:50 UTC | Jun 17, 09:05 UTC | 12h 15m |
| 2026-06-16 | BAW6 | HND → LHR | Jun 16, 04:20 UTC | Jun 16, 18:05 UTC | 13h 45m |
| 2026-06-15 | BAW5 | LHR → NRT | Jun 15, 12:49 UTC | Jun 16, 02:04 UTC | 13h 15m |
| 2026-06-14 | BAW86 | YVR → LHR | Jun 14, 01:05 UTC | Jun 14, 09:55 UTC | 8h 50m |
| 2026-06-13 | BAW87 | - | Jun 13, 14:00 UTC | Jun 13, 22:45 UTC | 8h 45m |
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-ZBKR page for operator, model, and routing details .