Apparatus

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sensors Mode-S transponder

A07F81

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N131GC · AIRBUS HELICOPTERS EC-130 · operated by RAINIER HELI INTERNATIONAL INC

Hex
A07F81
Octal
50077601
Decimal
10,518,401
Country
US
Tail
N131GC
Type
EC30
No current signal · last broadcast 11d ago
Flights observed
203
Distinct callsigns
1
Country
US
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S A07F81.

Country allocation

The ICAO 24-bit address A07F81 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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 1 distinct

Callsign Airline Flights Last seen
N131GC - 203 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N131GC - Jul 26, 21:45 UTCJul 26, 22:00 UTC15m
2026-07-26 N131GC - Jul 26, 14:10 UTCJul 26, 14:20 UTC10m
2026-07-25 N131GC - Jul 25, 14:15 UTCJul 25, 14:35 UTC20m
2026-07-22 N131GC - Jul 22, 23:30 UTCJul 22, 23:40 UTC10m
2026-07-22 N131GC - Jul 22, 14:35 UTCJul 22, 14:45 UTC10m
2026-07-18 N131GC - Jul 18, 22:50 UTCJul 18, 23:05 UTC15m
2026-07-17 N131GC - Jul 17, 02:45 UTCJul 17, 02:54 UTC10m
2026-07-16 N131GC - Jul 16, 22:05 UTCJul 16, 22:15 UTC10m
2026-07-16 N131GC - Jul 16, 02:40 UTCJul 16, 02:50 UTC10m
2026-07-16 N131GC - Jul 16, 01:15 UTCJul 16, 01:25 UTC10m
2026-07-15 N131GC - Jul 15, 15:35 UTCJul 15, 15:50 UTC15m
2026-07-14 N131GC - Jul 14, 18:15 UTCJul 14, 18:30 UTC15m
2026-06-20 N131GC - Jun 20, 21:19 UTCJun 20, 21:49 UTC30m
2026-06-20 N131GC - Jun 20, 16:29 UTCJun 20, 16:39 UTC10m
2026-06-20 N131GC - Jun 20, 15:29 UTCJun 20, 15:49 UTC20m
2026-06-20 N131GC - Jun 20, 14:19 UTCJun 20, 14:35 UTC15m
2026-06-19 N131GC - Jun 19, 16:39 UTCJun 19, 17:39 UTC1h 0m
2026-06-18 N131GC - Jun 18, 22:10 UTCJun 18, 22:40 UTC30m
2026-06-18 N131GC - Jun 18, 18:50 UTCJun 18, 19:05 UTC15m
2026-06-18 N131GC - Jun 18, 17:45 UTCJun 18, 18:05 UTC20m
2026-06-18 N131GC - Jun 18, 16:30 UTCJun 18, 16:40 UTC10m
2026-06-17 N131GC - Jun 17, 22:40 UTCJun 17, 23:05 UTC25m
2026-06-17 N131GC - Jun 17, 18:40 UTCJun 17, 18:55 UTC15m
2026-06-17 N131GC - Jun 17, 16:25 UTCJun 17, 17:30 UTC1h 5m
2026-06-16 N131GC - Jun 16, 21:45 UTCJun 16, 22:10 UTC25m
2026-06-16 N131GC - Jun 16, 14:15 UTCJun 16, 14:30 UTC15m
2026-06-15 N131GC - Jun 15, 20:00 UTCJun 15, 20:15 UTC15m
2026-06-15 N131GC - Jun 15, 18:50 UTCJun 15, 19:00 UTC10m
2026-06-15 N131GC - Jun 15, 17:40 UTCJun 15, 18:04 UTC25m
2026-06-15 N131GC - Jun 15, 16:30 UTCJun 15, 16:45 UTC15m
2026-06-14 N131GC - Jun 14, 20:00 UTCJun 14, 20:25 UTC25m
2026-06-14 N131GC - Jun 14, 16:15 UTCJun 14, 16:25 UTC10m
2026-06-14 N131GC - Jun 14, 15:00 UTCJun 14, 15:20 UTC20m
2026-06-14 N131GC - Jun 14, 14:10 UTCJun 14, 14:25 UTC15m
2026-06-13 N131GC - Jun 13, 22:20 UTCJun 13, 22:45 UTC25m
2026-06-13 N131GC - Jun 13, 14:15 UTCJun 13, 14:30 UTC15m
2026-06-11 N131GC - Jun 11, 23:40 UTCJun 12, 00:00 UTC20m
2026-06-11 N131GC - Jun 11, 18:50 UTCJun 11, 19:05 UTC15m
2026-06-11 N131GC - Jun 11, 02:40 UTCJun 11, 02:55 UTC15m
2026-06-11 N131GC - Jun 11, 01:15 UTCJun 11, 01:30 UTC15m
2026-06-10 N131GC - Jun 10, 22:45 UTCJun 10, 23:10 UTC25m
2026-06-10 N131GC - Jun 10, 18:45 UTCJun 10, 19:00 UTC15m
2026-06-08 N131GC - Jun 8, 23:45 UTCJun 9, 00:15 UTC30m
2026-06-08 N131GC - Jun 8, 14:10 UTCJun 8, 14:25 UTC15m
2026-06-07 N131GC - Jun 7, 22:25 UTCJun 7, 22:45 UTC20m
2026-06-07 N131GC - Jun 7, 14:15 UTCJun 7, 14:35 UTC20m
2026-06-06 N131GC - Jun 6, 22:50 UTCJun 6, 23:15 UTC25m
2026-06-06 N131GC - Jun 6, 14:14 UTCJun 6, 14:34 UTC20m
2026-06-06 N131GC - Jun 6, 02:35 UTCJun 6, 03:05 UTC30m
2026-06-06 N131GC - Jun 6, 01:15 UTCJun 6, 01:35 UTC20m

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 N131GC page for operator, model, and routing details .

Mode-S A07F81 frequently asked

What is Mode-S code A07F81?
A07F81 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N131GC.
Where is Mode-S A07F81 registered?
Mode-S code A07F81 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A07F81 broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A07F81, octal 50077601, decimal 10,518,401.
What flights does A07F81 operate?
Mode-S A07F81 has broadcast 1 distinct callsign, including N131GC.