Apparatus

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sensors Mode-S transponder

400664

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-BMRB · BOEING 757-200

Hex
400664
Octal
20003144
Decimal
4,195,940
Country
GB
Tail
G-BMRB
Type
B752
No current signal · last broadcast 13d ago
Flights observed
159
Distinct callsigns
20
Country
GB
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S 400664.

Country allocation

The ICAO 24-bit address 400664 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
DHK2134 - 20 2026-06-27
DHK12G - 18 2026-06-26
DHK2877 - 16 2026-06-30
DHK2876 - 15 2026-06-30
DHK2135 - 15 2026-06-25
DHK52H DHL Air 12 2026-06-30
DHK209P - 10 2026-06-16
DHK7017 - 9 2026-06-16
DHK4983 - 7 2026-06-15
DHK428 - 4 2026-04-29
DHK427 DHL Air 4 2026-06-29
DHK201P - 4 2026-06-27
DHK838P - 3 2026-06-26
DHK4894 - 3 2026-04-30
DHK2507 DHL Air 3 2026-06-11
DHK823 DHL Air 2 2026-06-11
DHK822 DHL Air 2 2026-06-11
DHK3318 DHL Air 2 2026-06-01
DHK2506 DHL Air 2 2026-06-11
DHK227P DHL Air 2 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-01 DHK801P - Jul 1, 11:50 UTCJul 1, 12:50 UTC1h 0m
2026-06-30 DHK52H EMA → LEJ Jun 30, 22:40 UTCJul 1, 00:00 UTC1h 20m
2026-06-30 DHK2877 ABZ → EMA Jun 30, 18:30 UTCJun 30, 19:25 UTC55m
2026-06-30 DHK2876 - Jun 30, 05:00 UTCJun 30, 05:50 UTC50m
2026-06-29 DHK427 CGN → EMA Jun 29, 22:10 UTCJun 29, 23:09 UTC1h 0m
2026-06-29 DHK823P LEJ → CGN Jun 29, 17:05 UTCJun 29, 17:45 UTC40m
2026-06-27 DHK201P EDI → LEJ Jun 27, 06:50 UTCJun 27, 08:29 UTC1h 40m
2026-06-27 DHK2134 LEJ → EDI Jun 27, 04:00 UTCJun 27, 05:39 UTC1h 40m
2026-06-26 DHK838P GVA → LEJ Jun 26, 05:30 UTCJun 26, 06:35 UTC1h 5m
2026-06-26 DHK12G LEJ → GVA Jun 26, 03:00 UTCJun 26, 04:04 UTC1h 5m
2026-06-25 DHK2135 - Jun 25, 19:39 UTCJun 25, 21:29 UTC1h 50m
2026-06-25 DHK2134 LEJ → EDI Jun 25, 03:15 UTCJun 25, 05:00 UTC1h 45m
2026-06-24 DHK2135 EDI → LEJ Jun 24, 19:29 UTCJun 24, 21:09 UTC1h 40m
2026-06-24 DHK2134 LEJ → EDI Jun 24, 02:54 UTCJun 24, 04:44 UTC1h 50m
2026-06-23 DHK2135 EDI → LEJ Jun 23, 19:44 UTCJun 23, 21:20 UTC1h 35m
2026-06-23 DHK2134 LEJ → EDI Jun 23, 03:04 UTCJun 23, 05:04 UTC2h 0m
2026-06-22 DHK52H EMA → LEJ Jun 22, 22:44 UTCJun 23, 00:09 UTC1h 25m
2026-06-22 DHK2877 ABZ → EMA Jun 22, 18:40 UTCJun 22, 19:34 UTC55m
2026-06-22 DHK2876 - Jun 22, 04:19 UTCJun 22, 05:15 UTC55m
2026-06-20 DHK201P EDI → LEJ Jun 20, 07:00 UTCJun 20, 07:44 UTC45m
2026-06-20 DHK2134 LEJ → EDI Jun 20, 03:59 UTCJun 20, 05:54 UTC1h 55m
2026-06-19 DHK2135 EDI → LEJ Jun 19, 19:59 UTCJun 19, 21:44 UTC1h 45m
2026-06-19 DHK2134 LEJ → EDI Jun 19, 02:59 UTCJun 19, 04:50 UTC1h 50m
2026-06-18 DHK52H EMA → LEJ Jun 18, 22:50 UTCJun 19, 00:20 UTC1h 29m
2026-06-18 DHK2877 ABZ → EMA Jun 18, 18:45 UTCJun 18, 19:40 UTC55m
2026-06-18 DHK2876 EMA → ABZ Jun 18, 05:15 UTCJun 18, 06:05 UTC50m
2026-06-18 DHK803 LEJ → EMA Jun 18, 01:30 UTCJun 18, 03:05 UTC1h 35m
2026-06-17 DHK52H EMA → LEJ Jun 17, 22:35 UTCJun 18, 00:05 UTC1h 30m
2026-06-17 DHK2877 ABZ → EMA Jun 17, 18:30 UTCJun 17, 19:25 UTC55m
2026-06-17 DHK2876 EMA → ABZ Jun 17, 05:15 UTCJun 17, 06:05 UTC50m
2026-06-16 DHK7017 - Jun 16, 22:15 UTCJun 17, 00:10 UTC1h 55m
2026-06-16 DHK209P - Jun 16, 19:00 UTCJun 16, 19:50 UTC51m
2026-06-16 DHK12G LEJ → GVA Jun 16, 02:50 UTCJun 16, 04:05 UTC1h 15m
2026-06-15 DHK4983 GVA → LEJ Jun 15, 19:35 UTCJun 15, 20:45 UTC1h 10m
2026-06-15 DHK12G LEJ → GVA Jun 15, 02:55 UTCJun 15, 04:04 UTC1h 10m
2026-06-13 DHK201P EDI → LEJ Jun 13, 06:55 UTCJun 13, 08:25 UTC1h 30m
2026-06-13 DHK2134 LEJ → EDI Jun 13, 03:50 UTCJun 13, 05:55 UTC2h 4m
2026-06-12 DHK838P GVA → LEJ Jun 12, 07:00 UTCJun 12, 08:15 UTC1h 15m
2026-06-12 DHK12G LEJ → GVA Jun 12, 04:00 UTCJun 12, 05:00 UTC1h 0m
2026-06-11 DHK52H EMA → LEJ Jun 11, 22:40 UTCJun 12, 00:10 UTC1h 30m
2026-06-11 DHK2507 BFS → EMA Jun 11, 19:35 UTCJun 11, 20:15 UTC40m
2026-06-11 DHK823 CGN → EMA Jun 11, 09:15 UTCJun 11, 09:55 UTC40m
2026-06-11 DHK822 CGN → LEJ Jun 11, 07:25 UTCJun 11, 08:05 UTC40m
2026-06-11 DHK2506 EMA → BFS Jun 11, 04:35 UTCJun 11, 05:15 UTC40m
2026-06-10 DHK7017 - Jun 10, 22:00 UTCJun 11, 00:00 UTC2h 0m
2026-06-10 DHK209P - Jun 10, 19:05 UTCJun 10, 19:55 UTC50m
2026-06-10 DHK12G LEJ → GVA Jun 10, 03:00 UTCJun 10, 04:10 UTC1h 10m
2026-06-09 DHK52H EMA → LEJ Jun 9, 22:45 UTCJun 10, 00:10 UTC1h 25m
2026-06-09 DHK2507 BFS → EMA Jun 9, 19:25 UTCJun 9, 20:05 UTC40m
2026-06-09 DHK823 CGN → EMA Jun 9, 08:45 UTCJun 9, 09:25 UTC40m

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

Mode-S 400664 frequently asked

What is Mode-S code 400664?
400664 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BMRB.
Where is Mode-S 400664 registered?
Mode-S code 400664 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 400664 broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 400664, octal 20003144, decimal 4,195,940.
What flights does 400664 operate?
Mode-S 400664 has broadcast 20 distinct callsigns, including DHK2134, DHK12G, DHK2877, DHK2876, DHK2135.