sensors Mode-S transponder
408143
ICAO 24-bit transponder address · allocated to United Kingdom
Currently assigned to G-DHMD · BOEING 777-200LR
- Hex
- 408143
- Octal
- 20100503
- Decimal
- 4,227,395
- Country
- GB
- Tail
- G-DHMD
- Type
- B77L
- Flights observed
- 203
- Distinct callsigns
- 20
- Country
- GB
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 408143 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 |
|---|---|---|---|
| DHK524 | - | 27 | 2026-06-30 |
| DHK051 | - | 21 | 2026-07-14 |
| DHK591 | - | 20 | 2026-06-26 |
| DHK075 | - | 12 | 2026-06-14 |
| DHK052 | - | 12 | 2026-07-13 |
| DHK593 | DHL Air | 11 | 2026-06-09 |
| DHK053 | - | 11 | 2026-06-28 |
| DHK009 | - | 9 | 2026-06-11 |
| DHK705 | - | 8 | 2026-06-17 |
| DHK076 | DHL Air | 8 | 2026-06-13 |
| DHK054 | - | 7 | 2026-06-27 |
| DHK528 | DHL Air | 6 | 2026-05-15 |
| DHK007 | - | 5 | 2026-06-18 |
| DHK004 | - | 5 | 2026-04-13 |
| DHK511 | - | 4 | 2026-06-28 |
| DHK372 | DHL Air | 3 | 2026-06-14 |
| DHK058 | DHL Air | 3 | 2026-06-19 |
| DHK057 | DHL Air | 3 | 2026-06-20 |
| DHK019 | - | 3 | 2026-07-12 |
| DHK011 | - | 3 | 2026-06-10 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-14 | DHK051 | - | Jul 14, 12:40 UTC | Jul 14, 15:50 UTC | 3h 10m |
| 2026-07-13 | DHK051 | - | Jul 13, 14:35 UTC | Jul 14, 07:25 UTC | 16h 50m |
| 2026-07-13 | DHK051 | - | Jul 13, 08:50 UTC | Jul 14, 07:25 UTC | 22h 35m |
| 2026-07-13 | DHK051 | - | Jul 13, 06:50 UTC | Jul 14, 06:45 UTC | 23h 55m |
| 2026-07-13 | DHK052 | - | Jul 13, 05:05 UTC | Jul 13, 21:50 UTC | 16h 45m |
| 2026-07-12 | DHK052 | EMA → BRU | Jul 12, 19:50 UTC | Jul 12, 20:40 UTC | 50m |
| 2026-07-12 | DHK019 | LEJ → EMA | Jul 12, 13:05 UTC | Jul 12, 14:30 UTC | 1h 25m |
| 2026-07-12 | DHK019 | - | Jul 12, 06:05 UTC | Jul 12, 10:05 UTC | 4h 0m |
| 2026-07-11 | DHK019 | - | Jul 11, 22:20 UTC | Jul 11, 22:40 UTC | 20m |
| 2026-06-30 | DHK524 | - | Jun 30, 13:00 UTC | Jun 30, 13:25 UTC | 25m |
| 2026-06-30 | DHK524 | - | Jun 30, 02:40 UTC | Jun 30, 06:15 UTC | 3h 35m |
| 2026-06-29 | DHK524 | EMA → MXP | Jun 29, 22:24 UTC | Jun 30, 00:00 UTC | 1h 35m |
| 2026-06-28 | DHK511 | LEJ → EMA | Jun 28, 20:34 UTC | Jun 28, 21:59 UTC | 1h 25m |
| 2026-06-28 | DHK800 | EMA → LEJ | Jun 28, 16:14 UTC | Jun 28, 17:39 UTC | 1h 25m |
| 2026-06-28 | DHK053 | LEJ → EMA | Jun 28, 11:25 UTC | Jun 28, 12:50 UTC | 1h 25m |
| 2026-06-27 | DHK053 | - | Jun 27, 14:45 UTC | Jun 28, 08:00 UTC | 17h 15m |
| 2026-06-27 | DHK053 | - | Jun 27, 08:49 UTC | Jun 28, 08:00 UTC | 23h 10m |
| 2026-06-27 | DHK054 | - | Jun 27, 06:50 UTC | Jun 28, 06:44 UTC | 23h 55m |
| 2026-06-27 | DHK054 | - | Jun 27, 05:10 UTC | Jun 28, 04:44 UTC | 23h 35m |
| 2026-06-26 | DHK054 | EMA → BRU | Jun 26, 21:35 UTC | Jun 26, 22:25 UTC | 50m |
| 2026-06-26 | DHK591 | - | Jun 26, 08:54 UTC | Jun 26, 17:25 UTC | 8h 30m |
| 2026-06-25 | DHK591 | - | Jun 25, 23:59 UTC | Jun 26, 04:00 UTC | 4h 0m |
| 2026-06-25 | DHK591 | - | Jun 25, 23:09 UTC | Jun 25, 23:24 UTC | 15m |
| 2026-06-25 | DHK524 | - | Jun 25, 12:44 UTC | Jun 25, 13:14 UTC | 30m |
| 2026-06-25 | DHK524 | - | Jun 25, 02:25 UTC | Jun 25, 06:09 UTC | 3h 45m |
| 2026-06-24 | DHK524 | EMA → MXP | Jun 24, 22:14 UTC | Jun 24, 23:59 UTC | 1h 45m |
| 2026-06-24 | DHK591 | DEL → EMA | Jun 24, 07:44 UTC | Jun 24, 16:14 UTC | 8h 30m |
| 2026-06-23 | DHK591 | HKG → DEL | Jun 23, 23:00 UTC | Jun 24, 03:44 UTC | 4h 45m |
| 2026-06-23 | DHK524 | - | Jun 23, 13:00 UTC | Jun 23, 13:29 UTC | 30m |
| 2026-06-23 | DHK524 | - | Jun 23, 02:40 UTC | Jun 23, 06:19 UTC | 3h 40m |
| 2026-06-22 | DHK524 | EMA → MXP | Jun 22, 22:19 UTC | Jun 22, 23:50 UTC | 1h 30m |
| 2026-06-22 | DHK701 | CVG → BAH | Jun 22, 00:55 UTC | Jun 22, 07:30 UTC | 6h 35m |
| 2026-06-21 | DHK701 | CVG → BAH | Jun 21, 09:44 UTC | Jun 21, 22:40 UTC | 12h 55m |
| 2026-06-20 | DHK384 | EMA → CVG | Jun 20, 23:14 UTC | Jun 21, 06:55 UTC | 7h 40m |
| 2026-06-20 | DHK057 | LEJ → LEJ | Jun 20, 19:04 UTC | Jun 20, 20:34 UTC | 1h 30m |
| 2026-06-19 | DHK057 | LEJ → LEJ | Jun 19, 22:14 UTC | Jun 20, 09:34 UTC | 11h 20m |
| 2026-06-19 | DHK057 | LEJ → LEJ | Jun 19, 13:09 UTC | Jun 20, 09:34 UTC | 20h 25m |
| 2026-06-19 | DHK058 | EMA → EMA | Jun 19, 09:24 UTC | Jun 19, 22:34 UTC | 13h 10m |
| 2026-06-18 | DHK058 | EMA → EMA | Jun 18, 15:05 UTC | Jun 19, 03:49 UTC | 12h 44m |
| 2026-06-18 | DHK007 | - | Jun 18, 08:15 UTC | Jun 18, 08:55 UTC | 40m |
| 2026-06-17 | DHK007 | - | Jun 17, 15:05 UTC | Jun 18, 05:35 UTC | 14h 30m |
| 2026-06-17 | DHK007 | - | Jun 17, 14:20 UTC | Jun 17, 14:35 UTC | 15m |
| 2026-06-17 | DHK705 | - | Jun 17, 11:15 UTC | Jun 17, 11:45 UTC | 30m |
| 2026-06-17 | DHK705 | - | Jun 17, 03:50 UTC | Jun 17, 09:05 UTC | 5h 15m |
| 2026-06-16 | DHK705 | - | Jun 16, 22:30 UTC | Jun 16, 22:55 UTC | 25m |
| 2026-06-16 | DHK705 | CVG → BAH | Jun 16, 10:15 UTC | Jun 16, 20:30 UTC | 10h 16m |
| 2026-06-14 | DHK372 | LEJ → EMA | Jun 14, 11:30 UTC | Jun 14, 19:15 UTC | 7h 45m |
| 2026-06-14 | DHK075 | LEJ → EMA | Jun 14, 07:30 UTC | Jun 14, 09:05 UTC | 1h 35m |
| 2026-06-13 | DHK075 | - | Jun 13, 23:40 UTC | Jun 14, 05:20 UTC | 5h 40m |
| 2026-06-13 | DHK075 | - | Jun 13, 20:45 UTC | Jun 13, 21:00 UTC | 15m |
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-DHMD page for operator, model, and routing details .