Apparatus

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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
No current signal · last broadcast Jul 26, 11:25 UTC
Flights observed
227
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 11:25 UTC

Last known position

Most recent position reported by Mode-S 408143.

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
DHK051 DHL Air 32 2026-07-25
DHK524 - 27 2026-06-30
DHK591 - 20 2026-06-26
DHK052 DHL Air 18 2026-07-24
DHK075 - 12 2026-06-14
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
DHK868 DHL Air 3 2026-07-19
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DHK314 LEJ → CVG Jul 26, 10:05 UTCJul 26, 11:20 UTC1h 15m
2026-07-25 DHK051 LEJ → LAX Jul 25, 12:10 UTCJul 25, 21:25 UTC9h 15m
2026-07-24 DHK051 LEJ → LAX Jul 24, 23:40 UTCJul 25, 09:45 UTC10h 5m
2026-07-24 DHK052 EMA → BRU Jul 24, 05:10 UTCJul 24, 21:35 UTC16h 25m
2026-07-24 DHK052 EMA → BRU Jul 24, 01:20 UTCJul 24, 02:15 UTC55m
2026-07-23 DHK051 LEJ → LAX Jul 23, 12:10 UTCJul 23, 21:35 UTC9h 25m
2026-07-22 DHK051 LEJ → LAX Jul 22, 14:30 UTCJul 23, 07:50 UTC17h 20m
2026-07-22 DHK051 LEJ → LAX Jul 22, 05:05 UTCJul 22, 22:25 UTC17h 20m
2026-07-22 DHK052 EMA → BRU Jul 22, 01:20 UTCJul 22, 02:10 UTC50m
2026-07-21 DHK051 LEJ → LAX Jul 21, 12:30 UTCJul 21, 21:55 UTC9h 25m
2026-07-20 DHK051 LEJ → LAX Jul 20, 21:05 UTCJul 21, 08:10 UTC11h 4m
2026-07-20 DHK051 LEJ → LAX Jul 20, 08:50 UTCJul 21, 08:10 UTC23h 19m
2026-07-20 DHK052 EMA → BRU Jul 20, 05:05 UTCJul 20, 22:50 UTC17h 45m
2026-07-19 DHK841 EMA → BRU Jul 19, 19:40 UTCJul 19, 20:35 UTC55m
2026-07-19 DHK868 CVG → EMA Jul 19, 10:20 UTCJul 19, 17:20 UTC7h 0m
2026-07-18 DHK817 EMA → LEJ Jul 18, 12:55 UTCJul 18, 21:45 UTC8h 50m
2026-07-18 DHK817 EMA → LEJ Jul 18, 08:25 UTCJul 18, 09:40 UTC1h 15m
2026-07-17 DHK803 LEJ → EMA Jul 17, 22:20 UTCJul 17, 23:39 UTC1h 20m
2026-07-17 DHK802 LEJ → CGN Jul 17, 15:44 UTCJul 17, 17:05 UTC1h 20m
2026-07-16 DHK051 - Jul 16, 12:34 UTCJul 16, 22:10 UTC9h 35m
2026-07-15 DHK051 - Jul 15, 14:25 UTCJul 16, 07:15 UTC16h 50m
2026-07-15 DHK051 - Jul 15, 06:50 UTCJul 16, 06:45 UTC23h 55m
2026-07-15 DHK052 - Jul 15, 05:05 UTCJul 15, 22:05 UTC17h 0m
2026-07-15 DHK052 - Jul 15, 01:20 UTCJul 15, 02:10 UTC50m
2026-07-14 DHK051 - Jul 14, 12:40 UTCJul 14, 22:15 UTC9h 35m
2026-07-13 DHK051 - Jul 13, 14:35 UTCJul 14, 07:25 UTC16h 50m
2026-07-13 DHK051 - Jul 13, 08:50 UTCJul 14, 07:25 UTC22h 35m
2026-07-13 DHK051 - Jul 13, 06:50 UTCJul 14, 06:45 UTC23h 55m
2026-07-13 DHK052 - Jul 13, 05:05 UTCJul 13, 21:50 UTC16h 45m
2026-07-12 DHK052 EMA → BRU Jul 12, 19:50 UTCJul 12, 20:40 UTC50m
2026-07-12 DHK019 LEJ → EMA Jul 12, 13:05 UTCJul 12, 14:30 UTC1h 25m
2026-07-12 DHK019 - Jul 12, 06:05 UTCJul 12, 10:05 UTC4h 0m
2026-07-11 DHK019 - Jul 11, 22:20 UTCJul 11, 22:40 UTC20m
2026-06-30 DHK524 - Jun 30, 13:00 UTCJun 30, 13:25 UTC25m
2026-06-30 DHK524 - Jun 30, 02:40 UTCJun 30, 06:15 UTC3h 35m
2026-06-29 DHK524 EMA → MXP Jun 29, 22:24 UTCJun 30, 00:00 UTC1h 35m
2026-06-28 DHK511 LEJ → EMA Jun 28, 20:34 UTCJun 28, 21:59 UTC1h 25m
2026-06-28 DHK800 EMA → LEJ Jun 28, 16:14 UTCJun 28, 17:39 UTC1h 25m
2026-06-28 DHK053 LEJ → EMA Jun 28, 11:25 UTCJun 28, 12:50 UTC1h 25m
2026-06-27 DHK053 - Jun 27, 14:45 UTCJun 28, 08:00 UTC17h 15m
2026-06-27 DHK053 - Jun 27, 08:49 UTCJun 28, 08:00 UTC23h 10m
2026-06-27 DHK054 - Jun 27, 06:50 UTCJun 28, 06:44 UTC23h 55m
2026-06-27 DHK054 - Jun 27, 05:10 UTCJun 28, 04:44 UTC23h 35m
2026-06-26 DHK054 EMA → BRU Jun 26, 21:35 UTCJun 26, 22:25 UTC50m
2026-06-26 DHK591 - Jun 26, 08:54 UTCJun 26, 17:25 UTC8h 30m
2026-06-25 DHK591 - Jun 25, 23:59 UTCJun 26, 04:00 UTC4h 0m
2026-06-25 DHK591 - Jun 25, 23:09 UTCJun 25, 23:24 UTC15m
2026-06-25 DHK524 - Jun 25, 12:44 UTCJun 25, 13:14 UTC30m
2026-06-25 DHK524 - Jun 25, 02:25 UTCJun 25, 06:09 UTC3h 45m
2026-06-24 DHK524 EMA → MXP Jun 24, 22:14 UTCJun 24, 23:59 UTC1h 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-DHMD page for operator, model, and routing details .

Mode-S 408143 frequently asked

What is Mode-S code 408143?
408143 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-DHMD.
Where is Mode-S 408143 registered?
Mode-S code 408143 is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 408143 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408143, octal 20100503, decimal 4,227,395.
What flights does 408143 operate?
Mode-S 408143 has broadcast 20 distinct callsigns, including DHK051, DHK524, DHK591, DHK052, DHK075.