Apparatus

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sensors Mode-S transponder

408142

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-DHMC · BOEING 777-200LR

Hex
408142
Octal
20100502
Decimal
4,227,394
Country
GB
Tail
G-DHMC
Type
B77L
Broadcasting now · callsign DHK009 · 29,375 ft
Flights observed
211
Distinct callsigns
20
Country
GB
Last broadcast
58m ago

Current position

408142 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 408142 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
DHK593 - 33 2026-06-21
DHK007 - 19 2026-07-08
DHK528 DHL Air 17 2026-06-05
DHK057 - 13 2026-07-11
DHK814 DHL Air 12 2026-05-13
DHK058 - 10 2026-07-10
DHK053 - 10 2026-07-04
DHK705 - 9 2026-07-12
DHK009 - 8 2026-07-14
DHK540 - 7 2026-06-01
DHK054 - 7 2026-07-04
DHK868 DHL Air 5 2026-05-15
DHK703 - 5 2026-07-03
DHK075 - 5 2026-07-05
DHK076 DHL Air 4 2026-06-11
DHK011 - 4 2026-07-14
DHK813 DHL Air 3 2026-04-23
DHK591 - 3 2026-07-03
DHK524 DHL Air 3 2026-04-25
DHK511 DHL Air 3 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DHK009 - Jul 14, 14:10 UTCJul 14, 14:25 UTC15m
2026-07-14 DHK011 - Jul 14, 11:05 UTCJul 14, 11:35 UTC30m
2026-07-13 DHK011 - Jul 13, 23:10 UTCJul 14, 06:25 UTC7h 15m
2026-07-13 DHK701 - Jul 13, 11:05 UTCJul 13, 17:50 UTC6h 45m
2026-07-13 DHK148 - Jul 13, 07:10 UTCJul 13, 08:05 UTC55m
2026-07-12 DHK146 - Jul 12, 14:20 UTCJul 13, 04:15 UTC13h 55m
2026-07-12 DHK705 - Jul 12, 00:25 UTCJul 12, 07:50 UTC7h 25m
2026-07-11 DHK057 LEJ → EMA Jul 11, 19:20 UTCJul 11, 20:45 UTC1h 25m
2026-07-10 DHK057 - Jul 10, 14:35 UTCJul 11, 09:45 UTC19h 10m
2026-07-10 DHK057 - Jul 10, 13:40 UTCJul 11, 09:45 UTC20h 6m
2026-07-10 DHK058 - Jul 10, 10:35 UTCJul 11, 09:45 UTC23h 11m
2026-07-10 DHK058 - Jul 10, 09:40 UTCJul 11, 08:30 UTC22h 50m
2026-07-10 DHK863 - Jul 10, 00:40 UTCJul 10, 06:55 UTC6h 15m
2026-07-09 DHK058 - Jul 9, 11:05 UTCJul 9, 18:00 UTC6h 55m
2026-07-08 DHK007 HKG → CVG Jul 8, 17:40 UTCJul 9, 08:05 UTC14h 25m
2026-07-08 DHK705 - Jul 8, 06:50 UTCJul 8, 14:35 UTC7h 45m
2026-07-07 DHK705 - Jul 7, 22:15 UTCJul 7, 22:40 UTC25m
2026-07-07 DHK705 - Jul 7, 10:00 UTCJul 7, 21:05 UTC11h 5m
2026-07-06 DHK058 EMA → CVG Jul 6, 03:45 UTCJul 6, 11:25 UTC7h 40m
2026-07-05 DHK075 LEJ → EMA Jul 5, 17:15 UTCJul 5, 18:40 UTC1h 25m
2026-07-04 DHK053 - Jul 4, 20:50 UTCJul 5, 14:40 UTC17h 50m
2026-07-04 DHK053 - Jul 4, 14:35 UTCJul 5, 14:30 UTC23h 55m
2026-07-04 DHK054 - Jul 4, 12:35 UTCJul 5, 11:50 UTC23h 15m
2026-07-04 DHK054 - Jul 4, 11:25 UTCJul 5, 04:00 UTC16h 35m
2026-07-04 DHK054 EMA → BRU Jul 4, 08:15 UTCJul 4, 09:05 UTC50m
2026-07-03 DHK591 DEL → EMA Jul 3, 19:40 UTCJul 4, 04:25 UTC8h 45m
2026-07-03 DHK591 - Jul 3, 12:20 UTCJul 3, 16:20 UTC4h 0m
2026-07-03 DHK591 - Jul 3, 11:20 UTCJul 3, 11:35 UTC15m
2026-07-03 DHK703 - Jul 3, 06:45 UTCJul 3, 07:25 UTC40m
2026-07-02 DHK703 - Jul 2, 23:25 UTCJul 3, 06:00 UTC6h 35m
2026-07-02 DHK703 - Jul 2, 20:50 UTCJul 2, 21:15 UTC25m
2026-07-02 DHK703 - Jul 2, 09:00 UTCJul 2, 19:40 UTC10h 40m
2026-07-02 DHK999P - Jul 2, 03:45 UTCJul 2, 06:45 UTC3h 0m
2026-06-22 DHK998 - Jun 22, 12:00 UTCJun 22, 15:24 UTC3h 25m
2026-06-21 DHK819 LEJ → CVG Jun 21, 16:19 UTCJun 22, 01:10 UTC8h 50m
2026-06-21 DHK819 EMA → LEJ Jun 21, 12:35 UTCJun 21, 13:44 UTC1h 10m
2026-06-21 DHK593 - Jun 21, 01:14 UTCJun 21, 10:04 UTC8h 50m
2026-06-20 DHK593 - Jun 20, 17:14 UTCJun 20, 21:19 UTC4h 5m
2026-06-20 DHK593 - Jun 20, 16:29 UTCJun 20, 16:39 UTC10m
2026-06-20 DHK011 EMA → HKG Jun 20, 01:24 UTCJun 20, 13:49 UTC12h 25m
2026-06-19 DHK053 - Jun 19, 16:14 UTCJun 19, 23:04 UTC6h 50m
2026-06-19 DHK053 - Jun 19, 10:09 UTCJun 19, 13:34 UTC3h 25m
2026-06-18 DHK053 - Jun 18, 20:45 UTCJun 19, 07:19 UTC10h 34m
2026-06-18 DHK053 - Jun 18, 08:35 UTCJun 19, 07:19 UTC22h 44m
2026-06-18 DHK053 - Jun 18, 06:35 UTCJun 19, 06:29 UTC23h 54m
2026-06-18 DHK054 - Jun 18, 05:05 UTCJun 18, 22:20 UTC17h 15m
2026-06-18 DHK054 - Jun 18, 01:25 UTCJun 18, 02:15 UTC50m
2026-06-17 DHK053 - Jun 17, 12:25 UTCJun 17, 22:15 UTC9h 50m
2026-06-16 DHK053 - Jun 16, 20:15 UTCJun 17, 06:55 UTC10h 40m
2026-06-16 DHK053 - Jun 16, 08:35 UTCJun 17, 06:55 UTC22h 21m

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-DHMC page for operator, model, and routing details .

Mode-S 408142 frequently asked

What is Mode-S code 408142?
408142 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-DHMC.
Where is Mode-S 408142 registered?
Mode-S code 408142 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 408142 broadcasting right now?
Yes. Mode-S 408142 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408142, octal 20100502, decimal 4,227,394.
What flights does 408142 operate?
Mode-S 408142 has broadcast 20 distinct callsigns, including DHK593, DHK007, DHK528, DHK057, DHK814.