Apparatus

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sensors Mode-S transponder

408127

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-MACZ · BOEING 767-200

Hex
408127
Octal
20100447
Decimal
4,227,367
Country
GB
Tail
G-MACZ
Type
B762
No current signal · last broadcast 17h ago
Flights observed
238
Distinct callsigns
9
Country
GB
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 408127.

Country allocation

The ICAO 24-bit address 408127 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 9 distinct

Callsign Airline Flights Last seen
MUK6977 - 39 2026-07-13
MUK6978 - 36 2026-07-12
SRR6977 - 30 2026-06-29
MUK6566 - 29 2026-07-09
MUK6565 - 29 2026-07-09
SRR6978 - 28 2026-06-28
SRR6565 - 24 2026-06-30
SRR6566 - 22 2026-06-30
UPS207 - 1 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 MUK6977 EMA → CGN Jul 13, 22:10 UTCJul 13, 23:30 UTC1h 20m
2026-07-12 MUK6978 CGN → EMA Jul 12, 23:15 UTCJul 13, 00:25 UTC1h 10m
2026-07-10 MUK6977 EMA → CGN Jul 10, 21:00 UTCJul 10, 22:05 UTC1h 5m
2026-07-10 MUK6977 - Jul 10, 18:45 UTCJul 10, 19:20 UTC35m
2026-07-10 MUK6978 EMA → BFS Jul 10, 03:50 UTCJul 10, 04:25 UTC35m
2026-07-10 MUK6978 CGN → EMA Jul 10, 01:15 UTCJul 10, 02:10 UTC55m
2026-07-09 MUK6565 EMA → CGN Jul 9, 21:35 UTCJul 9, 22:40 UTC1h 5m
2026-07-09 MUK6565 - Jul 9, 19:25 UTCJul 9, 20:05 UTC40m
2026-07-09 MUK6566 EMA → EDI Jul 9, 04:55 UTCJul 9, 05:35 UTC40m
2026-07-09 MUK6566 CGN → EMA Jul 9, 01:40 UTCJul 9, 02:40 UTC1h 0m
2026-07-08 MUK6977 EMA → CGN Jul 8, 22:00 UTCJul 8, 23:10 UTC1h 10m
2026-07-08 MUK6977 - Jul 8, 18:55 UTCJul 8, 19:45 UTC50m
2026-07-08 MUK6978 EMA → BFS Jul 8, 03:45 UTCJul 8, 04:25 UTC40m
2026-07-08 MUK6978 CGN → EMA Jul 8, 00:55 UTCJul 8, 01:55 UTC1h 0m
2026-07-06 MUK6977 EMA → CGN Jul 6, 22:05 UTCJul 6, 23:10 UTC1h 5m
2026-07-06 MUK6977 - Jul 6, 19:00 UTCJul 6, 19:45 UTC45m
2026-07-06 MUK6978 EMA → BFS Jul 6, 02:35 UTCJul 6, 03:15 UTC40m
2026-07-05 MUK6978 CGN → EMA Jul 5, 23:20 UTCJul 6, 00:20 UTC1h 0m
2026-07-03 MUK6977 EMA → CGN Jul 3, 22:00 UTCJul 3, 23:20 UTC1h 20m
2026-07-03 MUK6977 - Jul 3, 18:50 UTCJul 3, 19:25 UTC35m
2026-07-03 MUK6978 EMA → BFS Jul 3, 04:00 UTCJul 3, 04:40 UTC40m
2026-07-03 MUK6978 CGN → EMA Jul 3, 01:05 UTCJul 3, 02:10 UTC1h 5m
2026-07-02 MUK6565 EMA → CGN Jul 2, 21:30 UTCJul 2, 22:40 UTC1h 10m
2026-07-02 MUK6565 - Jul 2, 19:15 UTCJul 2, 19:55 UTC40m
2026-07-02 MUK6566 EMA → EDI Jul 2, 04:45 UTCJul 2, 05:30 UTC45m
2026-07-02 MUK6566 CGN → EMA Jul 2, 01:40 UTCJul 2, 02:40 UTC1h 0m
2026-07-01 UPS207 - Jul 1, 22:05 UTCJul 1, 23:05 UTC1h 0m
2026-07-01 MUK6977 - Jul 1, 18:55 UTCJul 1, 19:45 UTC50m
2026-07-01 MUK6978 EMA → BFS Jul 1, 03:45 UTCJul 1, 04:25 UTC40m
2026-07-01 MUK6978 CGN → EMA Jul 1, 00:50 UTCJul 1, 01:50 UTC1h 0m
2026-06-30 SRR6565 EMA → CGN Jun 30, 21:50 UTCJun 30, 23:05 UTC1h 15m
2026-06-30 MUK6565 - Jun 30, 19:30 UTCJun 30, 20:10 UTC40m
2026-06-30 MUK6566 EMA → EDI Jun 30, 04:45 UTCJun 30, 05:30 UTC45m
2026-06-30 SRR6566 CGN → EMA Jun 30, 01:55 UTCJun 30, 02:55 UTC1h 0m
2026-06-29 SRR6977 EMA → CGN Jun 29, 22:10 UTCJun 29, 23:14 UTC1h 5m
2026-06-29 MUK6977 - Jun 29, 19:00 UTCJun 29, 19:49 UTC50m
2026-06-29 MUK6978 EMA → BFS Jun 29, 02:35 UTCJun 29, 03:14 UTC40m
2026-06-28 SRR6978 CGN → EMA Jun 28, 23:20 UTCJun 29, 00:14 UTC55m
2026-06-26 SRR6977 EMA → CGN Jun 26, 21:59 UTCJun 26, 23:04 UTC1h 5m
2026-06-26 MUK6977 - Jun 26, 19:00 UTCJun 26, 19:39 UTC40m
2026-06-26 MUK6978 EMA → BFS Jun 26, 03:54 UTCJun 26, 04:34 UTC40m
2026-06-26 SRR6978 CGN → EMA Jun 26, 01:05 UTCJun 26, 02:05 UTC1h 0m
2026-06-25 SRR6565 EMA → CGN Jun 25, 21:29 UTCJun 25, 22:34 UTC1h 5m
2026-06-25 MUK6565 - Jun 25, 19:24 UTCJun 25, 20:09 UTC45m
2026-06-25 MUK6566 EMA → EDI Jun 25, 04:49 UTCJun 25, 06:00 UTC1h 10m
2026-06-25 SRR6566 CGN → EMA Jun 25, 01:44 UTCJun 25, 02:49 UTC1h 5m
2026-06-24 SRR6977 EMA → CGN Jun 24, 22:04 UTCJun 24, 23:04 UTC1h 0m
2026-06-24 MUK6977 - Jun 24, 18:55 UTCJun 24, 19:29 UTC35m
2026-06-24 MUK6978 EMA → BFS Jun 24, 03:55 UTCJun 24, 04:34 UTC40m
2026-06-24 SRR6978 CGN → EMA Jun 24, 01:09 UTCJun 24, 02:09 UTC1h 0m

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

Mode-S 408127 frequently asked

What is Mode-S code 408127?
408127 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-MACZ.
Where is Mode-S 408127 registered?
Mode-S code 408127 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 408127 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408127, octal 20100447, decimal 4,227,367.
What flights does 408127 operate?
Mode-S 408127 has broadcast 9 distinct callsigns, including MUK6977, MUK6978, SRR6977, MUK6566, MUK6565.