Apparatus

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sensors Mode-S transponder

3C665A

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIRZ · EMBRAER EMB-135 Legacy

Hex
3C665A
Octal
17063132
Decimal
3,958,362
Country
DE
Tail
D-AIRZ
Type
E35L
No current signal · last broadcast Jul 26, 15:30 UTC
Flights observed
231
Distinct callsigns
11
Country
DE
Last broadcast
Jul 26, 15:30 UTC

Last known position

Most recent position reported by Mode-S 3C665A.

Country allocation

The ICAO 24-bit address 3C665A falls within the block assigned to Germany (DE) by ICAO Annex 10, Volume III. Every aircraft registered in Germany 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
VJH721 - 213 2026-07-26
VJH438H - 3 2026-05-16
KRH721 - 3 2026-04-16
VJH947W - 2 2026-05-31
VJH507L - 2 2026-07-10
VJH199T - 2 2026-07-22
VJH124 - 2 2026-05-02
VJH990W - 1 2026-06-12
VJH900W - 1 2026-06-20
VJH264 - 1 2026-05-04
VJH042Y - 1 2026-04-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 VJH721 - Jul 26, 13:15 UTCJul 26, 15:30 UTC2h 15m
2026-07-26 VJH721 - Jul 26, 10:50 UTCJul 26, 12:00 UTC1h 10m
2026-07-26 VJH721 - Jul 26, 07:35 UTCJul 26, 08:15 UTC40m
2026-07-25 VJH721 - Jul 25, 16:20 UTCJul 25, 17:00 UTC40m
2026-07-25 VJH721 - Jul 25, 13:30 UTCJul 25, 14:25 UTC55m
2026-07-25 VJH721 - Jul 25, 10:35 UTCJul 25, 12:05 UTC1h 30m
2026-07-25 VJH721 - Jul 25, 07:45 UTCJul 25, 09:00 UTC1h 15m
2026-07-24 VJH721 - Jul 24, 17:50 UTCJul 24, 18:15 UTC25m
2026-07-24 VJH721 - Jul 24, 15:50 UTCJul 24, 17:15 UTC1h 25m
2026-07-24 VJH721 - Jul 24, 11:25 UTCJul 24, 12:35 UTC1h 10m
2026-07-24 VJH721 - Jul 24, 07:05 UTCJul 24, 08:10 UTC1h 5m
2026-07-23 VJH721 NCE → NHT Jul 23, 14:40 UTCJul 23, 16:40 UTC2h 0m
2026-07-23 VJH721 - Jul 23, 11:35 UTCJul 23, 12:35 UTC1h 0m
2026-07-23 VJH721 - Jul 23, 09:00 UTCJul 23, 10:35 UTC1h 35m
2026-07-22 VJH199T BEG → TRN Jul 22, 14:05 UTCJul 22, 15:35 UTC1h 30m
2026-07-22 VJH199T - Jul 22, 12:05 UTCJul 22, 13:10 UTC1h 5m
2026-07-21 VJH721 - Jul 21, 17:00 UTCJul 21, 19:25 UTC2h 25m
2026-07-21 VJH721 - Jul 21, 13:40 UTCJul 21, 14:55 UTC1h 15m
2026-07-21 VJH721 NCE → BCN Jul 21, 10:50 UTCJul 21, 11:55 UTC1h 5m
2026-07-21 VJH721 - Jul 21, 07:40 UTCJul 21, 08:05 UTC25m
2026-07-20 VJH721 - Jul 20, 18:55 UTCJul 20, 19:20 UTC25m
2026-07-20 VJH721 - Jul 20, 16:45 UTCJul 20, 17:35 UTC50m
2026-07-20 VJH721 - Jul 20, 13:40 UTCJul 20, 14:35 UTC55m
2026-07-20 VJH721 ANR → MXP Jul 20, 11:15 UTCJul 20, 12:20 UTC1h 5m
2026-07-20 VJH721 BER → ANR Jul 20, 08:15 UTCJul 20, 09:20 UTC1h 5m
2026-07-19 VJH721 BOD → BER Jul 19, 15:40 UTCJul 19, 17:35 UTC1h 55m
2026-07-19 VJH721 - Jul 19, 12:05 UTCJul 19, 14:00 UTC1h 55m
2026-07-19 VJH721 - Jul 19, 10:25 UTCJul 19, 11:00 UTC35m
2026-07-18 VJH721 - Jul 18, 19:35 UTCJul 18, 20:30 UTC55m
2026-07-18 VJH721 - Jul 18, 16:25 UTCJul 18, 17:55 UTC1h 30m
2026-07-18 VJH721 - Jul 18, 12:05 UTCJul 18, 14:15 UTC2h 10m
2026-07-17 VJH721 SOU → BQH Jul 17, 14:50 UTCJul 17, 15:29 UTC40m
2026-07-17 VJH721 DBV → SOU Jul 17, 11:15 UTCJul 17, 13:50 UTC2h 35m
2026-07-17 VJH721 - Jul 17, 08:25 UTCJul 17, 09:25 UTC1h 0m
2026-07-16 VJH721 LIN → OLB Jul 16, 16:15 UTCJul 16, 17:10 UTC55m
2026-07-16 VJH721 - Jul 16, 12:34 UTCJul 16, 13:20 UTC45m
2026-07-16 VJH721 - Jul 16, 09:55 UTCJul 16, 11:20 UTC1h 25m
2026-07-15 VJH721 - Jul 15, 13:00 UTCJul 15, 14:15 UTC1h 15m
2026-07-15 VJH721 - Jul 15, 09:15 UTCJul 15, 10:45 UTC1h 30m
2026-07-15 VJH721 - Jul 15, 06:55 UTCJul 15, 07:45 UTC50m
2026-07-15 VJH721 NCE → BCN Jul 15, 03:45 UTCJul 15, 04:35 UTC50m
2026-07-14 VJH721 - Jul 14, 12:00 UTCJul 14, 13:45 UTC1h 45m
2026-07-13 VJH721 - Jul 13, 21:00 UTCJul 13, 21:45 UTC45m
2026-07-13 VJH721 IBZ → AMS Jul 13, 15:50 UTCJul 13, 17:55 UTC2h 5m
2026-07-13 VJH721 - Jul 13, 13:55 UTCJul 13, 14:45 UTC50m
2026-07-13 VJH721 - Jul 13, 09:40 UTCJul 13, 12:25 UTC2h 45m
2026-07-12 VJH721 - Jul 12, 16:15 UTCJul 12, 17:40 UTC1h 25m
2026-07-12 VJH721 IBZ → LIN Jul 12, 13:15 UTCJul 12, 14:40 UTC1h 25m
2026-07-12 VJH721 - Jul 12, 10:25 UTCJul 12, 12:25 UTC2h 0m
2026-07-11 VJH721 - Jul 11, 09:35 UTCJul 11, 11:10 UTC1h 35m

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 D-AIRZ page for operator, model, and routing details .

Mode-S 3C665A frequently asked

What is Mode-S code 3C665A?
3C665A is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIRZ.
Where is Mode-S 3C665A registered?
Mode-S code 3C665A is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C665A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 15:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C665A, octal 17063132, decimal 3,958,362.
What flights does 3C665A operate?
Mode-S 3C665A has broadcast 11 distinct callsigns, including VJH721, VJH438H, KRH721, VJH947W, VJH507L.