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sensors Mode-S transponder

407A3A

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-NHVC · AGUSTA AW-139

Hex
407A3A
Octal
20075072
Decimal
4,225,594
Country
GB
Tail
G-NHVC
Type
A139
No current signal · last broadcast 7h ago
Flights observed
168
Distinct callsigns
11
Country
GB
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 407A3A.

Country allocation

The ICAO 24-bit address 407A3A 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 11 distinct

Callsign Airline Flights Last seen
NHZ02A - 44 2026-07-03
NHZ02B - 34 2026-07-04
NHZ02C - 27 2026-07-03
NHZ02D - 25 2026-06-30
NHZ24 - 18 2026-06-29
NHZ02E - 6 2026-06-15
NHZ37A - 5 2026-07-03
NHZ24T - 4 2026-05-18
NHZ02F - 3 2026-05-28
NHZ24A - 1 2026-07-03
GOLD24 - 1 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-04 NHZ02B - Jul 4, 16:50 UTCJul 4, 17:00 UTC10m
2026-07-04 NHZ02B - Jul 4, 15:45 UTCJul 4, 15:55 UTC10m
2026-07-03 NHZ02C - Jul 3, 18:35 UTCJul 3, 18:45 UTC10m
2026-07-03 NHZ02C - Jul 3, 17:35 UTCJul 3, 17:45 UTC10m
2026-07-03 NHZ37A - Jul 3, 11:20 UTCJul 3, 13:25 UTC2h 5m
2026-07-03 NHZ02A - Jul 3, 07:35 UTCJul 3, 07:45 UTC10m
2026-07-03 NHZ02A - Jul 3, 06:30 UTCJul 3, 06:45 UTC15m
2026-07-03 NHZ24A DHR → DHR Jul 3, 05:20 UTCJul 3, 05:35 UTC15m
2026-06-30 NHZ02D - Jun 30, 16:45 UTCJun 30, 16:55 UTC10m
2026-06-30 NHZ02D - Jun 30, 15:30 UTCJun 30, 15:40 UTC10m
2026-06-30 NHZ02C - Jun 30, 13:40 UTCJun 30, 13:55 UTC15m
2026-06-30 NHZ02C - Jun 30, 12:50 UTCJun 30, 13:05 UTC15m
2026-06-30 NHZ02B - Jun 30, 09:50 UTCJun 30, 10:05 UTC15m
2026-06-30 NHZ02B - Jun 30, 08:55 UTCJun 30, 09:20 UTC25m
2026-06-30 NHZ02A - Jun 30, 06:10 UTCJun 30, 06:25 UTC15m
2026-06-30 NHZ02A - Jun 30, 05:05 UTCJun 30, 05:20 UTC15m
2026-06-29 NHZ02D - Jun 29, 16:50 UTCJun 29, 16:59 UTC10m
2026-06-29 NHZ02D - Jun 29, 15:30 UTCJun 29, 15:49 UTC20m
2026-06-29 NHZ24 - Jun 29, 12:45 UTCJun 29, 12:55 UTC10m
2026-06-29 NHZ24 DHR → DHR Jun 29, 09:20 UTCJun 29, 09:40 UTC20m
2026-06-25 NHZ37A - Jun 25, 13:05 UTCJun 25, 13:59 UTC55m
2026-06-25 NHZ02A - Jun 25, 09:29 UTCJun 25, 10:25 UTC55m
2026-06-24 NHZ02C - Jun 24, 11:59 UTCJun 24, 13:14 UTC1h 15m
2026-06-24 NHZ02B - Jun 24, 09:34 UTCJun 24, 10:30 UTC55m
2026-06-24 NHZ02A - Jun 24, 06:10 UTCJun 24, 06:55 UTC45m
2026-06-24 NHZ02A - Jun 24, 05:05 UTCJun 24, 05:34 UTC30m
2026-06-23 NHZ02D - Jun 23, 16:24 UTCJun 23, 16:59 UTC35m
2026-06-23 NHZ02D - Jun 23, 15:44 UTCJun 23, 16:14 UTC30m
2026-06-23 NHZ02A - Jun 23, 06:04 UTCJun 23, 06:44 UTC40m
2026-06-23 NHZ02A - Jun 23, 05:04 UTCJun 23, 05:59 UTC55m
2026-06-22 NHZ37A - Jun 22, 13:44 UTCJun 22, 13:59 UTC15m
2026-06-22 NHZ37A - Jun 22, 12:25 UTCJun 22, 13:05 UTC40m
2026-06-22 NHZ02B - Jun 22, 10:10 UTCJun 22, 10:30 UTC20m
2026-06-22 NHZ02B - Jun 22, 09:10 UTCJun 22, 09:54 UTC45m
2026-06-22 NHZ02A - Jun 22, 08:10 UTCJun 22, 08:25 UTC15m
2026-06-22 NHZ02A - Jun 22, 06:39 UTCJun 22, 06:49 UTC10m
2026-06-22 NHZ24 - Jun 22, 05:34 UTCJun 22, 05:54 UTC20m
2026-06-17 NHZ02D - Jun 17, 17:45 UTCJun 17, 18:00 UTC15m
2026-06-17 NHZ02D - Jun 17, 15:46 UTCJun 17, 16:00 UTC15m
2026-06-17 NHZ02C - Jun 17, 12:45 UTCJun 17, 13:10 UTC25m
2026-06-17 NHZ02C - Jun 17, 11:50 UTCJun 17, 12:15 UTC25m
2026-06-17 NHZ02B - Jun 17, 09:55 UTCJun 17, 10:50 UTC55m
2026-06-17 NHZ02A - Jun 17, 06:35 UTCJun 17, 06:50 UTC15m
2026-06-17 NHZ02A - Jun 17, 05:00 UTCJun 17, 05:20 UTC20m
2026-06-16 NHZ02D - Jun 16, 16:55 UTCJun 16, 17:05 UTC10m
2026-06-16 NHZ02D - Jun 16, 15:50 UTCJun 16, 16:05 UTC15m
2026-06-16 NHZ02C - Jun 16, 12:50 UTCJun 16, 13:50 UTC1h 0m
2026-06-16 NHZ02B - Jun 16, 07:45 UTCJun 16, 08:44 UTC1h 0m
2026-06-16 NHZ02A - Jun 16, 06:20 UTCJun 16, 06:40 UTC20m
2026-06-16 NHZ02A - Jun 16, 05:05 UTCJun 16, 05:25 UTC20m

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

Mode-S 407A3A frequently asked

What is Mode-S code 407A3A?
407A3A is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-NHVC.
Where is Mode-S 407A3A registered?
Mode-S code 407A3A 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 407A3A broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407A3A, octal 20075072, decimal 4,225,594.
What flights does 407A3A operate?
Mode-S 407A3A has broadcast 11 distinct callsigns, including NHZ02A, NHZ02B, NHZ02C, NHZ02D, NHZ24.