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sensors Mode-S transponder

407AAF

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-NJAB · CESSNA 560XL Citation XLS

Hex
407AAF
Octal
20075257
Decimal
4,225,711
Country
GB
Tail
G-NJAB
Type
C56X
No current signal · last broadcast Jul 25, 13:50 UTC
Flights observed
193
Distinct callsigns
20
Country
GB
Last broadcast
Jul 25, 13:50 UTC

Last known position

Most recent position reported by Mode-S 407AAF.

Country allocation

The ICAO 24-bit address 407AAF 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
NJU9CF - 35 2026-07-24
NJU550G - 3 2026-05-14
NJU976G - 2 2026-04-15
NJU944U - 2 2026-07-10
NJU927N - 2 2026-04-17
NJU906L - 2 2026-06-26
NJU805W - 2 2026-04-14
NJU305F - 2 2026-07-01
NJU272T - 2 2026-04-23
NJU248L - 2 2026-07-25
NJU994Q - 1 2026-04-27
NJU989P - 1 2026-04-24
NJU988L - 1 2026-05-14
NJU976P - 1 2026-07-09
NJU964W - 1 2026-05-27
NJU959G - 1 2026-04-20
NJU954Y - 1 2026-06-13
NJU951D - 1 2026-04-30
NJU936D - 1 2026-07-17
NJU920M - 1 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 NJU580Q - Jul 25, 12:45 UTCJul 25, 13:50 UTC1h 5m
2026-07-25 NJU248L - Jul 25, 10:00 UTCJul 25, 11:25 UTC1h 25m
2026-07-25 NJU248L - Jul 25, 07:15 UTCJul 25, 07:50 UTC35m
2026-07-24 NJU9CF JER → BQH Jul 24, 15:50 UTCJul 24, 16:40 UTC50m
2026-07-23 NJU746F STN → JER Jul 23, 16:10 UTCJul 23, 16:55 UTC45m
2026-07-23 NJU269Y LIN → STN Jul 23, 13:15 UTCJul 23, 15:00 UTC1h 45m
2026-07-23 NJU9CF JER → LIN Jul 23, 10:15 UTCJul 23, 11:50 UTC1h 35m
2026-07-22 NJU590E DUB → JER Jul 22, 14:00 UTCJul 22, 14:55 UTC55m
2026-07-22 NJU837B - Jul 22, 11:55 UTCJul 22, 12:30 UTC35m
2026-07-21 NJU867L LIN → CEQ Jul 21, 08:35 UTCJul 21, 09:35 UTC1h 0m
2026-07-19 NJU641P - Jul 19, 14:10 UTCJul 19, 14:55 UTC45m
2026-07-19 NJU886C - Jul 19, 11:05 UTCJul 19, 12:55 UTC1h 50m
2026-07-19 NJU9CF - Jul 19, 06:55 UTCJul 19, 07:30 UTC35m
2026-07-18 NJU469G EDI → GCI Jul 18, 13:20 UTCJul 18, 14:25 UTC1h 5m
2026-07-18 NJU866T JER → EDI Jul 18, 10:20 UTCJul 18, 11:40 UTC1h 20m
2026-07-18 NJU823U FAO → JER Jul 18, 06:10 UTCJul 18, 08:15 UTC2h 5m
2026-07-17 NJU675W SOU → FAO Jul 17, 12:35 UTCJul 17, 15:05 UTC2h 30m
2026-07-17 NJU936D - Jul 17, 09:04 UTCJul 17, 09:45 UTC40m
2026-07-17 NJU131M - Jul 17, 07:20 UTCJul 17, 08:00 UTC40m
2026-07-16 NJU908K LPL → FAB Jul 16, 17:54 UTCJul 16, 18:29 UTC35m
2026-07-16 NJU727D BOH → LPL Jul 16, 15:05 UTCJul 16, 15:45 UTC40m
2026-07-16 NJU9CF JER → BOH Jul 16, 11:10 UTCJul 16, 11:34 UTC25m
2026-07-15 NJU492G GLA → JER Jul 15, 16:15 UTCJul 15, 17:30 UTC1h 15m
2026-07-15 NJU651D - Jul 15, 10:30 UTCJul 15, 11:20 UTC50m
2026-07-15 NJU386F JER → BHX Jul 15, 07:55 UTCJul 15, 08:40 UTC45m
2026-07-14 NJU9CF ABZ → JER Jul 14, 13:05 UTCJul 14, 14:30 UTC1h 25m
2026-07-14 NJU353Y - Jul 14, 09:35 UTCJul 14, 10:25 UTC50m
2026-07-14 NJU251G JER → MAN Jul 14, 06:55 UTCJul 14, 07:50 UTC55m
2026-07-13 NJU9CF - Jul 13, 18:15 UTCJul 13, 19:05 UTC50m
2026-07-13 NJU143F - Jul 13, 13:05 UTCJul 13, 14:30 UTC1h 25m
2026-07-13 NJU571L - Jul 13, 10:55 UTCJul 13, 12:10 UTC1h 15m
2026-07-13 NJU9CF - Jul 13, 07:35 UTCJul 13, 08:05 UTC30m
2026-07-12 NJU9CF BOH → GCI Jul 12, 13:15 UTCJul 12, 13:50 UTC35m
2026-07-10 NJU944U - Jul 10, 12:25 UTCJul 10, 13:25 UTC1h 0m
2026-07-10 NJU944U MAN → AMS Jul 10, 10:20 UTCJul 10, 11:20 UTC1h 0m
2026-07-09 NJU189T - Jul 9, 10:05 UTCJul 9, 10:45 UTC40m
2026-07-09 NJU976P - Jul 9, 08:00 UTCJul 9, 09:00 UTC1h 0m
2026-07-08 NJU855A - Jul 8, 17:15 UTCJul 8, 18:05 UTC50m
2026-07-08 NJU9CF BOH → LBG Jul 8, 13:05 UTCJul 8, 13:55 UTC50m
2026-07-02 NJU290H - Jul 2, 15:25 UTCJul 2, 15:55 UTC30m
2026-07-02 NJU497A - Jul 2, 14:00 UTCJul 2, 14:35 UTC35m
2026-07-02 NJU9CF JER → FAB Jul 2, 09:05 UTCJul 2, 09:40 UTC35m
2026-07-01 NJU9CF SOU → JER Jul 1, 17:30 UTCJul 1, 18:00 UTC30m
2026-07-01 NJU614B - Jul 1, 10:55 UTCJul 1, 12:05 UTC1h 10m
2026-07-01 NJU305F - Jul 1, 08:45 UTCJul 1, 10:05 UTC1h 20m
2026-06-30 NJU093W GCI → STN Jun 30, 12:50 UTCJun 30, 13:30 UTC40m
2026-06-30 NJU9CF - Jun 30, 10:35 UTCJun 30, 11:55 UTC1h 20m
2026-06-29 NJU903Q - Jun 29, 15:14 UTCJun 29, 15:30 UTC15m
2026-06-29 NJU446D - Jun 29, 12:39 UTCJun 29, 13:44 UTC1h 5m
2026-06-29 NJU430B - Jun 29, 10:00 UTCJun 29, 10:59 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-NJAB page for operator, model, and routing details .

Mode-S 407AAF frequently asked

What is Mode-S code 407AAF?
407AAF is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-NJAB.
Where is Mode-S 407AAF registered?
Mode-S code 407AAF 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 407AAF broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 13:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407AAF, octal 20075257, decimal 4,225,711.
What flights does 407AAF operate?
Mode-S 407AAF has broadcast 20 distinct callsigns, including NJU9CF, NJU550G, NJU976G, NJU944U, NJU927N.