Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

3D257B

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-EMLF · CIRRUS SR-22

Hex
3D257B
Octal
17222573
Decimal
4,007,291
Country
DE
Tail
D-EMLF
Type
SR22
No current signal · last broadcast 1d ago
Flights observed
40
Distinct callsigns
4
Country
DE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3D257B.

Country allocation

The ICAO 24-bit address 3D257B 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 4 distinct

Callsign Airline Flights Last seen
DEMLF - 34 2026-07-13
FHG91 - 2 2026-07-12
FHG90 - 2 2026-07-12
FHG89 - 2 2026-07-12

Recent flights last 40

DateFlightRouteTakeoffLandingDuration
2026-07-13 DEMLF - Jul 13, 05:01 UTCJul 13, 06:05 UTC1h 5m
2026-07-12 FHG91 - Jul 12, 12:20 UTCJul 12, 13:25 UTC1h 5m
2026-07-12 FHG90 - Jul 12, 09:10 UTCJul 12, 11:20 UTC2h 10m
2026-07-12 FHG89 - Jul 12, 06:50 UTCJul 12, 08:35 UTC1h 45m
2026-07-09 DEMLF - Jul 9, 18:10 UTCJul 9, 19:15 UTC1h 5m
2026-07-06 DEMLF - Jul 6, 05:00 UTCJul 6, 06:05 UTC1h 5m
2026-07-05 DEMLF - Jul 5, 10:00 UTCJul 5, 11:05 UTC1h 5m
2026-07-04 DEMLF - Jul 4, 10:10 UTCJul 4, 11:10 UTC1h 0m
2026-07-03 DEMLF - Jul 3, 06:10 UTCJul 3, 07:10 UTC1h 0m
2026-07-01 DEMLF NUE → MGL Jul 1, 11:20 UTCJul 1, 12:40 UTC1h 20m
2026-06-30 DEMLF - Jun 30, 11:10 UTCJun 30, 12:40 UTC1h 30m
2026-06-29 DEMLF - Jun 29, 07:05 UTCJun 29, 08:04 UTC1h 0m
2026-06-28 DEMLF - Jun 28, 10:04 UTCJun 28, 11:04 UTC1h 0m
2026-06-27 DEMLF - Jun 27, 07:15 UTCJun 27, 08:14 UTC1h 0m
2026-06-26 DEMLF - Jun 26, 08:20 UTCJun 26, 09:20 UTC1h 0m
2026-06-24 DEMLF - Jun 24, 14:39 UTCJun 24, 16:45 UTC2h 5m
2026-06-21 DEMLF - Jun 21, 08:44 UTCJun 21, 09:59 UTC1h 15m
2026-06-19 DEMLF - Jun 19, 09:55 UTCJun 19, 10:50 UTC55m
2026-06-15 DEMLF - Jun 15, 05:00 UTCJun 15, 06:10 UTC1h 10m
2026-06-11 DEMLF - Jun 11, 16:35 UTCJun 11, 18:00 UTC1h 25m
2026-06-08 DEMLF - Jun 8, 04:55 UTCJun 8, 06:05 UTC1h 10m
2026-06-07 DEMLF - Jun 7, 08:45 UTCJun 7, 09:30 UTC45m
2026-06-06 DEMLF - Jun 6, 09:09 UTCJun 6, 09:55 UTC45m
2026-06-03 DEMLF - Jun 3, 16:05 UTCJun 3, 17:00 UTC55m
2026-05-31 DEMLF - May 31, 15:05 UTCMay 31, 15:55 UTC50m
2026-05-31 FHG91 - May 31, 13:45 UTCMay 31, 14:35 UTC50m
2026-05-31 FHG90 - May 31, 10:35 UTCMay 31, 12:55 UTC2h 20m
2026-05-31 FHG89 - May 31, 08:25 UTCMay 31, 09:40 UTC1h 15m
2026-05-29 DEMLF - May 29, 06:05 UTCMay 29, 06:55 UTC50m
2026-05-26 DEMLF - May 26, 05:00 UTCMay 26, 06:04 UTC1h 5m
2026-05-24 DEMLF - May 24, 17:55 UTCMay 24, 18:05 UTC10m
2026-05-08 DEMLF - May 8, 13:15 UTCMay 8, 14:10 UTC55m
2026-05-04 DEMLF HAJ → MGL May 4, 04:55 UTCMay 4, 06:05 UTC1h 10m
2026-05-03 DEMLF CEQ → HAJ May 3, 07:40 UTCMay 3, 11:50 UTC4h 10m
2026-05-01 DEMLF - May 1, 07:30 UTCMay 1, 09:40 UTC2h 10m
2026-05-01 DEMLF - May 1, 05:50 UTCMay 1, 07:05 UTC1h 15m
2026-04-30 DEMLF - Apr 30, 14:15 UTCApr 30, 15:15 UTC1h 0m
2026-04-26 DEMLF - Apr 26, 08:50 UTCApr 26, 09:45 UTC55m
2026-04-17 DEMLF - Apr 17, 06:05 UTCApr 17, 06:55 UTC50m
2026-04-13 DEMLF - Apr 13, 05:00 UTCApr 13, 06:05 UTC1h 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-EMLF page for operator, model, and routing details .

Mode-S 3D257B frequently asked

What is Mode-S code 3D257B?
3D257B is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-EMLF.
Where is Mode-S 3D257B registered?
Mode-S code 3D257B is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D257B broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3D257B, octal 17222573, decimal 4,007,291.
What flights does 3D257B operate?
Mode-S 3D257B has broadcast 4 distinct callsigns, including DEMLF, FHG91, FHG90, FHG89.