Apparatus

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sensors Mode-S transponder

3D77FF

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-FRRR · PILATUS PC-12

Hex
3D77FF
Octal
17273777
Decimal
4,028,415
Country
DE
Tail
D-FRRR
Type
PC12
No current signal · last broadcast 21h ago
Flights observed
191
Distinct callsigns
20
Country
DE
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 3D77FF.

Country allocation

The ICAO 24-bit address 3D77FF 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
PAV417 - 13 2026-07-17
PAV416 - 12 2026-07-16
PAV404 - 10 2026-07-04
PAV409 - 9 2026-07-09
PAV430 - 8 2026-06-30
PAV420 - 8 2026-06-20
DFRRR - 8 2026-07-12
PAV428 - 7 2026-05-28
PAV424 - 7 2026-06-24
PAV422 - 7 2026-06-22
PAV421 - 7 2026-06-21
PAV408 - 7 2026-07-08
PAV429 - 6 2026-06-29
PAV425 - 6 2026-06-25
PAV413 - 6 2026-07-13
PAV411 - 6 2026-07-11
PAV407 - 6 2026-07-07
PAV406 - 6 2026-07-06
PAV418 - 5 2026-05-18
PAV414 - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 PAV417 - Jul 17, 11:45 UTCJul 17, 12:04 UTC20m
2026-07-17 PAV417 STR → BLQ Jul 17, 07:05 UTCJul 17, 08:30 UTC1h 25m
2026-07-16 PAV416 LEJ → STR Jul 16, 15:35 UTCJul 16, 16:35 UTC1h 0m
2026-07-16 PAV416 STR → LEJ Jul 16, 04:45 UTCJul 16, 05:35 UTC50m
2026-07-15 PAV415 - Jul 15, 06:55 UTCJul 15, 07:55 UTC1h 0m
2026-07-14 PAV414 STR → MGL Jul 14, 08:45 UTCJul 14, 09:45 UTC1h 0m
2026-07-13 PAV413 - Jul 13, 11:20 UTCJul 13, 12:50 UTC1h 30m
2026-07-13 PAV413 FKB → ZAD Jul 13, 07:30 UTCJul 13, 09:10 UTC1h 40m
2026-07-13 PAV413 STR → FKB Jul 13, 06:25 UTCJul 13, 06:50 UTC25m
2026-07-12 DFRRR - Jul 12, 14:55 UTCJul 12, 16:25 UTC1h 30m
2026-07-12 PAV412 VIE → NCE Jul 12, 12:15 UTCJul 12, 14:20 UTC2h 5m
2026-07-12 DFRRR STR → VIE Jul 12, 09:55 UTCJul 12, 11:15 UTC1h 20m
2026-07-11 PAV411 - Jul 11, 17:00 UTCJul 11, 18:45 UTC1h 45m
2026-07-11 PAV411 - Jul 11, 06:05 UTCJul 11, 08:01 UTC1h 55m
2026-07-10 PAV410 - Jul 10, 09:55 UTCJul 10, 10:15 UTC20m
2026-07-10 PAV410 - Jul 10, 08:45 UTCJul 10, 09:30 UTC45m
2026-07-10 PAV410 STR → OBF Jul 10, 07:05 UTCJul 10, 07:35 UTC30m
2026-07-09 PAV409 - Jul 9, 14:05 UTCJul 9, 16:00 UTC1h 55m
2026-07-09 PAV409 - Jul 9, 06:00 UTCJul 9, 07:30 UTC1h 30m
2026-07-08 PAV408 - Jul 8, 15:50 UTCJul 8, 18:20 UTC2h 30m
2026-07-08 PAV408 - Jul 8, 08:40 UTCJul 8, 15:10 UTC6h 30m
2026-07-07 PAV407 - Jul 7, 14:25 UTCJul 7, 16:00 UTC1h 35m
2026-07-07 PAV407 - Jul 7, 12:00 UTCJul 7, 13:45 UTC1h 45m
2026-07-07 PAV407 STR → SWS Jul 7, 07:50 UTCJul 7, 10:30 UTC2h 40m
2026-07-06 PAV406 - Jul 6, 15:30 UTCJul 6, 17:05 UTC1h 35m
2026-07-06 PAV406 - Jul 6, 11:45 UTCJul 6, 14:10 UTC2h 25m
2026-07-06 PAV406 STR → OXF Jul 6, 08:30 UTCJul 6, 10:45 UTC2h 15m
2026-07-05 PAV405 - Jul 5, 15:30 UTCJul 5, 18:20 UTC2h 50m
2026-07-05 PAV405 - Jul 5, 12:50 UTCJul 5, 14:00 UTC1h 10m
2026-07-05 PAV405 - Jul 5, 10:00 UTCJul 5, 11:10 UTC1h 10m
2026-07-04 PAV404 BOD → LIN Jul 4, 15:20 UTCJul 4, 17:05 UTC1h 45m
2026-07-04 PAV404 STR → BOD Jul 4, 12:15 UTCJul 4, 14:20 UTC2h 5m
2026-07-03 PAV403 NUE → STR Jul 3, 17:20 UTCJul 3, 17:45 UTC25m
2026-07-03 PAV403 - Jul 3, 14:55 UTCJul 3, 16:25 UTC1h 30m
2026-07-03 PAV403 - Jul 3, 05:25 UTCJul 3, 06:45 UTC1h 20m
2026-07-03 PAV403 STR → NUE Jul 3, 04:15 UTCJul 3, 04:45 UTC30m
2026-07-02 PAV402 - Jul 2, 12:40 UTCJul 2, 14:20 UTC1h 40m
2026-07-02 PAV402 - Jul 2, 10:30 UTCJul 2, 11:30 UTC1h 0m
2026-07-02 PAV402 - Jul 2, 08:05 UTCJul 2, 08:25 UTC20m
2026-07-01 PAV401 - Jul 1, 16:20 UTCJul 1, 17:30 UTC1h 10m
2026-07-01 PAV401 - Jul 1, 13:35 UTCJul 1, 14:40 UTC1h 5m
2026-07-01 PAV401 - Jul 1, 10:05 UTCJul 1, 11:55 UTC1h 50m
2026-06-30 PAV430 - Jun 30, 12:55 UTCJun 30, 14:25 UTC1h 30m
2026-06-30 PAV430 - Jun 30, 10:05 UTCJun 30, 11:30 UTC1h 25m
2026-06-29 PAV429 - Jun 29, 08:19 UTCJun 29, 10:59 UTC2h 40m
2026-06-29 PAV429 STR → LHA Jun 29, 06:44 UTCJun 29, 07:34 UTC50m
2026-06-28 DFRRR STR → STR Jun 28, 17:25 UTCJun 28, 18:19 UTC55m
2026-06-28 DFRRR STR → STR Jun 28, 15:29 UTCJun 28, 16:00 UTC30m
2026-06-28 DFRRR - Jun 28, 11:25 UTCJun 28, 13:10 UTC1h 45m
2026-06-27 PAV427 - Jun 27, 07:39 UTCJun 27, 08:55 UTC1h 15m

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

Mode-S 3D77FF frequently asked

What is Mode-S code 3D77FF?
3D77FF is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-FRRR.
Where is Mode-S 3D77FF registered?
Mode-S code 3D77FF is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3D77FF broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3D77FF, octal 17273777, decimal 4,028,415.
What flights does 3D77FF operate?
Mode-S 3D77FF has broadcast 20 distinct callsigns, including PAV417, PAV416, PAV404, PAV409, PAV430.