Apparatus

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sensors Mode-S transponder

3C171B

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AXTM · BOMBARDIER BD-700 Global 6000/6500

Hex
3C171B
Octal
17013433
Decimal
3,938,075
Country
DE
Tail
D-AXTM
Type
GLEX
No current signal · last broadcast 3h ago
Flights observed
73
Distinct callsigns
20
Country
DE
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 3C171B.

Country allocation

The ICAO 24-bit address 3C171B 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 20 distinct

Callsign Airline Flights Last seen
IFA6223 - 6 2026-04-17
IFA6181 - 6 2026-07-12
DAXTM - 5 2026-05-13
IFA6387 - 3 2026-06-11
IFA6384 - 3 2026-06-10
IFA6338 - 3 2026-05-30
IFA6321 - 3 2026-05-17
IFA6227 - 3 2026-05-04
IFA6424 - 2 2026-07-16
IFA6413 - 2 2026-07-06
IFA6402 - 2 2026-06-18
IFA6390 - 2 2026-06-21
IFA6368 - 2 2026-07-17
IFA6358 - 2 2026-07-04
IFA6343 - 2 2026-06-06
IFA6320 - 2 2026-06-04
IFA6314 - 2 2026-05-14
IFA6306 - 2 2026-06-02
IFA6298 - 2 2026-05-24
IFA6289 - 2 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 IFA6368 - Jul 17, 13:05 UTCJul 17, 23:10 UTC10h 5m
2026-07-17 IFA6368 - Jul 17, 08:59 UTCJul 17, 10:20 UTC1h 20m
2026-07-16 IFA6424 - Jul 16, 20:09 UTCJul 17, 05:30 UTC9h 20m
2026-07-15 IFA6424 - Jul 15, 14:50 UTCJul 15, 17:05 UTC2h 15m
2026-07-12 IFA6181 MUC → AUS Jul 12, 08:15 UTCJul 12, 18:30 UTC10h 15m
2026-07-11 IFA6181 NUE → MUC Jul 11, 18:40 UTCJul 11, 19:05 UTC25m
2026-07-07 IFA235 EDI → NUE Jul 7, 10:30 UTCJul 7, 12:15 UTC1h 45m
2026-07-06 IFA6413 - Jul 6, 07:25 UTCJul 6, 16:40 UTC9h 15m
2026-07-05 IFA6413 - Jul 5, 17:10 UTCJul 5, 19:35 UTC2h 25m
2026-07-04 IFA6358 - Jul 4, 07:45 UTCJul 4, 18:25 UTC10h 40m
2026-07-04 IFA6358 - Jul 4, 04:50 UTCJul 4, 06:05 UTC1h 15m
2026-07-02 IFA6081 - Jul 2, 11:50 UTCJul 2, 12:05 UTC15m
2026-06-22 IFA6419 - Jun 22, 21:35 UTCJun 23, 00:54 UTC3h 20m
2026-06-21 IFA6390 - Jun 21, 20:24 UTCJun 21, 21:44 UTC1h 20m
2026-06-21 IFA6390 - Jun 21, 10:44 UTCJun 21, 19:39 UTC8h 55m
2026-06-21 IFA6181 - Jun 21, 06:35 UTCJun 21, 07:20 UTC45m
2026-06-20 IFA6181 AUS → NCE Jun 20, 20:29 UTCJun 21, 05:54 UTC9h 25m
2026-06-20 IFA6181 - Jun 20, 02:19 UTCJun 20, 02:44 UTC25m
2026-06-19 IFA6181 - Jun 19, 21:49 UTCJun 20, 01:24 UTC3h 35m
2026-06-18 IFA6402 - Jun 18, 06:05 UTCJun 18, 15:15 UTC9h 10m
2026-06-17 IFA6402 NUE → BER Jun 17, 17:25 UTCJun 17, 18:10 UTC45m
2026-06-13 IFA231 BUD → NUE Jun 13, 08:10 UTCJun 13, 09:10 UTC1h 0m
2026-06-12 IFA6366 ORF → BUD Jun 12, 23:25 UTCJun 13, 07:30 UTC8h 4m
2026-06-11 IFA6387 - Jun 11, 18:40 UTCJun 11, 19:30 UTC50m
2026-06-11 IFA6387 - Jun 11, 15:10 UTCJun 11, 16:30 UTC1h 20m
2026-06-11 IFA6387 - Jun 11, 09:30 UTCJun 11, 15:05 UTC5h 35m
2026-06-10 IFA6384 AUS → BQH Jun 10, 05:45 UTCJun 10, 14:50 UTC9h 5m
2026-06-09 IFA6384 - Jun 9, 16:45 UTCJun 9, 18:35 UTC1h 50m
2026-06-09 IFA6384 - Jun 9, 15:40 UTCJun 9, 15:50 UTC10m
2026-06-08 IFA6273 PSA → SLC Jun 8, 13:20 UTCJun 8, 23:55 UTC10h 35m
2026-06-08 IFA6273 - Jun 8, 09:55 UTCJun 8, 11:55 UTC2h 0m
2026-06-06 IFA6343 - Jun 6, 19:24 UTCJun 7, 04:40 UTC9h 15m
2026-06-05 IFA6343 - Jun 5, 15:00 UTCJun 5, 16:15 UTC1h 15m
2026-06-04 IFA6320 - Jun 4, 07:10 UTCJun 4, 15:50 UTC8h 40m
2026-06-04 IFA6320 NCE → PEG Jun 4, 05:00 UTCJun 4, 05:45 UTC45m
2026-06-03 IFA6272 - Jun 3, 15:05 UTCJun 3, 22:00 UTC6h 55m
2026-06-03 IFA6272 - Jun 3, 12:20 UTCJun 3, 13:10 UTC50m
2026-06-02 IFA6306 LBG → BUF Jun 2, 12:50 UTCJun 2, 20:05 UTC7h 15m
2026-06-02 IFA6306 NUE → LBG Jun 2, 10:00 UTCJun 2, 11:05 UTC1h 5m
2026-06-01 IFA227 LTN → NUE Jun 1, 07:35 UTCJun 1, 09:05 UTC1h 30m
2026-05-30 IFA6338 - May 30, 02:10 UTCMay 30, 12:05 UTC9h 55m
2026-05-25 IFA6338 - May 25, 10:50 UTCMay 25, 21:09 UTC10h 20m
2026-05-25 IFA6338 AMS → LTN May 25, 08:30 UTCMay 25, 09:20 UTC50m
2026-05-24 IFA6298 - May 24, 23:15 UTCMay 25, 06:05 UTC6h 50m
2026-05-24 IFA6298 - May 24, 20:10 UTCMay 24, 20:30 UTC20m
2026-05-23 IFA6289 - May 23, 19:05 UTCMay 24, 04:20 UTC9h 15m
2026-05-23 IFA6289 NUE → AMS May 23, 06:10 UTCMay 23, 07:10 UTC1h 0m
2026-05-18 IFA6177 - May 18, 17:35 UTCMay 18, 18:45 UTC1h 9m
2026-05-18 IFA6177 - May 18, 04:40 UTCMay 18, 14:00 UTC9h 20m
2026-05-17 IFA6321 - May 17, 14:10 UTCMay 17, 16:15 UTC2h 5m

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

Mode-S 3C171B frequently asked

What is Mode-S code 3C171B?
3C171B is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AXTM.
Where is Mode-S 3C171B registered?
Mode-S code 3C171B is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C171B broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C171B, octal 17013433, decimal 3,938,075.
What flights does 3C171B operate?
Mode-S 3C171B has broadcast 20 distinct callsigns, including IFA6223, IFA6181, DAXTM, IFA6387, IFA6384.