Apparatus

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sensors Mode-S transponder

3B77EC

ICAO 24-bit transponder address · allocated to France

Currently assigned to 146 · SOCATA TBM-700A/B/C

Hex
3B77EC
Octal
16673754
Decimal
3,897,324
Country
FR
Tail
146
Type
TBM7
No current signal · last broadcast 1d ago
Flights observed
117
Distinct callsigns
20
Country
FR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3B77EC.

Country allocation

The ICAO 24-bit address 3B77EC falls within the block assigned to France (FR) by ICAO Annex 10, Volume III. Every aircraft registered in France 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
CTM3895 - 15 2026-05-13
CTM1305 - 12 2026-07-15
CTM3891 - 8 2026-05-11
CTM3885 - 8 2026-07-01
CTM3899 - 7 2026-06-24
CTM3894 - 7 2026-06-04
CTM3897 - 6 2026-06-20
CTM1306 - 6 2026-07-13
CTM3822 - 5 2026-04-28
CTM1308 - 5 2026-06-16
CTM3883 - 4 2026-06-11
CTM3880 - 4 2026-05-06
CTM1309 - 4 2026-05-21
CTM0073 - 4 2026-07-07
CTM3896 - 3 2026-05-04
CTM3892 - 3 2026-07-16
CTM004 - 3 2026-06-18
FAF9175 - 2 2026-05-27
CTM3898 - 2 2026-06-08
CTM3887 - 2 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 CTM3892 - Jul 16, 16:00 UTCJul 16, 17:54 UTC1h 55m
2026-07-16 CTM3892 - Jul 16, 12:20 UTCJul 16, 13:05 UTC45m
2026-07-16 CTM3892 BOD → VIY Jul 16, 06:30 UTCJul 16, 07:35 UTC1h 5m
2026-07-15 CTM1305 - Jul 15, 13:15 UTCJul 15, 13:45 UTC30m
2026-07-15 CTM1305 - Jul 15, 12:10 UTCJul 15, 12:25 UTC15m
2026-07-15 CTM1305 - Jul 15, 08:45 UTCJul 15, 09:00 UTC15m
2026-07-15 CTM1305 - Jul 15, 07:25 UTCJul 15, 07:45 UTC20m
2026-07-13 CTM1306 - Jul 13, 12:40 UTCJul 13, 12:45 UTC5m
2026-07-08 CTM1306 - Jul 8, 12:35 UTCJul 8, 14:00 UTC1h 25m
2026-07-08 CTM1306 - Jul 8, 07:35 UTCJul 8, 07:55 UTC20m
2026-07-07 CTM0073 - Jul 7, 15:05 UTCJul 7, 16:05 UTC1h 0m
2026-07-07 CTM0073 - Jul 7, 13:25 UTCJul 7, 14:35 UTC1h 10m
2026-07-07 CTM0073 - Jul 7, 07:00 UTCJul 7, 08:05 UTC1h 5m
2026-07-07 CTM0073 - Jul 7, 05:20 UTCJul 7, 06:30 UTC1h 10m
2026-07-06 CTM1305 - Jul 6, 13:20 UTCJul 6, 16:15 UTC2h 55m
2026-07-06 CTM1305 - Jul 6, 06:40 UTCJul 6, 09:25 UTC2h 45m
2026-07-01 CTM3885 LYN → BOD Jul 1, 20:15 UTCJul 1, 21:20 UTC1h 5m
2026-07-01 CTM072 DBV → LYN Jul 1, 16:15 UTCJul 1, 18:45 UTC2h 30m
2026-07-01 CTM072 ESK → DBV Jul 1, 12:10 UTCJul 1, 14:50 UTC2h 40m
2026-06-30 CTM3885 - Jun 30, 10:30 UTCJun 30, 12:55 UTC2h 25m
2026-06-30 CTM3885 LYN → DBV Jun 30, 06:10 UTCJun 30, 08:35 UTC2h 25m
2026-06-30 CTM3885 BOD → LYN Jun 30, 03:50 UTCJun 30, 04:55 UTC1h 5m
2026-06-29 CTM1305 - Jun 29, 07:55 UTCJun 29, 09:54 UTC2h 0m
2026-06-24 CTM3899 ORY → BOD Jun 24, 17:10 UTCJun 24, 18:20 UTC1h 10m
2026-06-24 CTM3899 - Jun 24, 14:29 UTCJun 24, 16:05 UTC1h 35m
2026-06-24 CTM3899 - Jun 24, 12:25 UTCJun 24, 13:44 UTC1h 20m
2026-06-23 CTM3899 - Jun 23, 06:34 UTCJun 23, 09:09 UTC2h 35m
2026-06-23 CTM3899 BOD → VIY Jun 23, 04:35 UTCJun 23, 05:45 UTC1h 10m
2026-06-22 CTM3854 - Jun 22, 18:35 UTCJun 22, 19:49 UTC1h 15m
2026-06-22 CTM3854 BOD → TLN Jun 22, 14:49 UTCJun 22, 18:00 UTC3h 10m
2026-06-20 CTM3897 - Jun 20, 20:00 UTCJun 20, 21:14 UTC1h 15m
2026-06-20 CTM3897 - Jun 20, 17:59 UTCJun 20, 19:15 UTC1h 15m
2026-06-19 CTM3897 - Jun 19, 15:09 UTCJun 19, 16:55 UTC1h 45m
2026-06-19 CTM3897 - Jun 19, 14:54 UTCJun 19, 15:04 UTC10m
2026-06-19 CTM3897 - Jun 19, 14:39 UTCJun 19, 14:49 UTC10m
2026-06-19 CTM3897 - Jun 19, 12:39 UTCJun 19, 13:54 UTC1h 15m
2026-06-18 CTM004 TNF → BOD Jun 18, 14:10 UTCJun 18, 15:25 UTC1h 15m
2026-06-18 CTM004 BRU → VIY Jun 18, 12:50 UTCJun 18, 13:45 UTC55m
2026-06-18 CTM004 - Jun 18, 09:35 UTCJun 18, 11:00 UTC1h 25m
2026-06-16 CTM1308 - Jun 16, 14:20 UTCJun 16, 14:45 UTC25m
2026-06-13 CTM3887 - Jun 13, 12:35 UTCJun 13, 14:00 UTC1h 25m
2026-06-13 CTM3887 - Jun 13, 05:10 UTCJun 13, 06:20 UTC1h 10m
2026-06-11 CTM3883 - Jun 11, 12:15 UTCJun 11, 13:10 UTC55m
2026-06-11 CTM3883 - Jun 11, 06:30 UTCJun 11, 07:25 UTC55m
2026-06-10 CARAFON2 - Jun 10, 11:30 UTCJun 10, 11:45 UTC15m
2026-06-09 CTM3899 BES → BOD Jun 9, 12:35 UTCJun 9, 13:40 UTC1h 5m
2026-06-09 CTM3899 - Jun 9, 07:40 UTCJun 9, 09:10 UTC1h 30m
2026-06-08 CTM3898 VIY → BOD Jun 8, 12:50 UTCJun 8, 14:10 UTC1h 20m
2026-06-08 CTM3898 BOD → VIY Jun 8, 04:40 UTCJun 8, 05:50 UTC1h 10m
2026-06-04 CTM3894 - Jun 4, 12:05 UTCJun 4, 13:35 UTC1h 30m

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 146 page for operator, model, and routing details .

Mode-S 3B77EC frequently asked

What is Mode-S code 3B77EC?
3B77EC is an ICAO 24-bit transponder address. Allocated to France. Assigned to 146.
Where is Mode-S 3B77EC registered?
Mode-S code 3B77EC is allocated to France (FR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3B77EC 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 3B77EC, octal 16673754, decimal 3,897,324.
What flights does 3B77EC operate?
Mode-S 3B77EC has broadcast 20 distinct callsigns, including CTM3895, CTM1305, CTM3891, CTM3885, CTM3899.