sensors Mode-S transponder

3DF26F

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-HMBF · AIRBUS HELICOPTERS EC-145

Hex
3DF26F
Octal
17371157
Decimal
4,059,759
Country
DE
Tail
D-HMBF
Type
EC45
No current signal · last broadcast 12d ago
Flights observed
4
Distinct callsigns
2
Country
DE
Last broadcast
12d ago

Last known position

Most recent position reported by Mode-S 3DF26F.

Country allocation

The ICAO 24-bit address 3DF26F 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 2 distinct

Callsign Airline Flights Last seen
RFX129 - 3 2026-05-21
RDF29 - 1 2026-05-08

Recent flights last 4

DateFlightRouteTakeoffLandingDuration
2026-05-21 RFX129 - May 21, 10:10 UTCMay 21, 10:30 UTC20m
2026-05-21 RFX129 - May 21, 08:30 UTCMay 21, 08:50 UTC20m
2026-05-08 RDF29 - May 8, 12:00 UTCMay 8, 12:44 UTC45m
2026-04-19 RFX129 - Apr 19, 04:40 UTCApr 19, 05:25 UTC45m

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

Mode-S 3DF26F frequently asked

What is Mode-S code 3DF26F?
3DF26F is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-HMBF.
Where is Mode-S 3DF26F registered?
Mode-S code 3DF26F is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3DF26F broadcasting right now?
No active broadcast right now. Last signal was 12d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3DF26F, octal 17371157, decimal 4,059,759.
What flights does 3DF26F operate?
Mode-S 3DF26F has broadcast 2 distinct callsigns, including RFX129, RDF29.