Apparatus

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sensors Mode-S transponder

A97A37

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N71FF · operated by FF22 LLC

Hex
A97A37
Octal
52275067
Decimal
11,106,871
Country
US
Tail
N71FF
Type
C172
No current signal · last broadcast 9h ago
Flights observed
182
Distinct callsigns
1
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S A97A37.

Country allocation

The ICAO 24-bit address A97A37 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
N71FF - 182 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N71FF - Jul 14, 00:05 UTCJul 14, 01:20 UTC1h 15m
2026-07-13 N71FF MYF → MYF Jul 13, 20:00 UTCJul 13, 21:15 UTC1h 15m
2026-07-13 N71FF MYF → MYF Jul 13, 17:25 UTCJul 13, 18:10 UTC45m
2026-07-12 N71FF MYF → MYF Jul 12, 21:45 UTCJul 12, 23:15 UTC1h 30m
2026-07-11 N71FF - Jul 11, 23:00 UTCJul 11, 23:40 UTC40m
2026-07-11 N71FF MYF → HMT Jul 11, 22:05 UTCJul 11, 22:45 UTC40m
2026-07-11 N71FF MYF → MYF Jul 11, 19:45 UTCJul 11, 21:00 UTC1h 15m
2026-07-11 N71FF - Jul 11, 16:45 UTCJul 11, 18:30 UTC1h 45m
2026-07-11 N71FF - Jul 11, 00:45 UTCJul 11, 02:10 UTC1h 25m
2026-07-10 N71FF MYF → MYF Jul 10, 22:20 UTCJul 10, 23:55 UTC1h 35m
2026-07-10 N71FF MYF → MYF Jul 10, 19:25 UTCJul 10, 20:55 UTC1h 30m
2026-07-10 N71FF - Jul 10, 00:00 UTCJul 10, 01:05 UTC1h 5m
2026-07-09 N71FF - Jul 9, 22:15 UTCJul 9, 23:25 UTC1h 10m
2026-07-09 N71FF MYF → MYF Jul 9, 19:55 UTCJul 9, 21:20 UTC1h 25m
2026-07-09 N71FF - Jul 9, 16:50 UTCJul 9, 18:10 UTC1h 20m
2026-07-09 N71FF - Jul 9, 04:35 UTCJul 9, 05:30 UTC55m
2026-07-09 N71FF - Jul 9, 02:10 UTCJul 9, 02:20 UTC10m
2026-07-09 N71FF MYF → SEE Jul 9, 01:15 UTCJul 9, 01:50 UTC35m
2026-07-08 N71FF - Jul 8, 21:55 UTCJul 8, 22:55 UTC1h 0m
2026-07-08 N71FF MYF → MYF Jul 8, 00:15 UTCJul 8, 03:05 UTC2h 50m
2026-07-07 N71FF BFL → MYF Jul 7, 20:40 UTCJul 7, 22:35 UTC1h 55m
2026-07-06 N71FF BFL → BFL Jul 6, 23:45 UTCJul 7, 00:20 UTC35m
2026-07-06 N71FF BFL → BFL Jul 6, 14:15 UTCJul 6, 15:30 UTC1h 15m
2026-07-05 N71FF BFL → BFL Jul 5, 20:45 UTCJul 5, 21:55 UTC1h 10m
2026-07-03 N71FF BFL → BFL Jul 3, 23:20 UTCJul 4, 00:25 UTC1h 5m
2026-07-01 N71FF BFL → BFL Jul 1, 18:25 UTCJul 1, 19:50 UTC1h 25m
2026-07-01 N71FF BFL → BFL Jul 1, 15:55 UTCJul 1, 16:50 UTC55m
2026-07-01 N71FF BFL → BFL Jul 1, 14:00 UTCJul 1, 14:55 UTC55m
2026-07-01 N71FF BFL → BFL Jul 1, 03:40 UTCJul 1, 04:40 UTC1h 0m
2026-06-30 N71FF BFL → BFL Jun 30, 20:50 UTCJun 30, 22:30 UTC1h 40m
2026-06-30 N71FF BFL → BFL Jun 30, 18:35 UTCJun 30, 19:45 UTC1h 10m
2026-06-30 N71FF BFL → BFL Jun 30, 16:15 UTCJun 30, 17:45 UTC1h 30m
2026-06-30 N71FF BFL → BFL Jun 30, 13:35 UTCJun 30, 14:25 UTC50m
2026-06-29 N71FF BFL → BFL Jun 29, 20:59 UTCJun 29, 22:10 UTC1h 10m
2026-06-29 N71FF BFL → BFL Jun 29, 19:00 UTCJun 29, 20:09 UTC1h 10m
2026-06-29 N71FF - Jun 29, 14:34 UTCJun 29, 15:04 UTC30m
2026-06-29 N71FF - Jun 29, 13:30 UTCJun 29, 13:54 UTC25m
2026-06-28 N71FF BFL → BFL Jun 28, 20:39 UTCJun 28, 22:20 UTC1h 40m
2026-06-28 N71FF - Jun 28, 17:55 UTCJun 28, 19:40 UTC1h 45m
2026-06-28 N71FF BFL → BFL Jun 28, 15:40 UTCJun 28, 17:30 UTC1h 50m
2026-06-28 N71FF BFL → BFL Jun 28, 03:45 UTCJun 28, 04:55 UTC1h 10m
2026-06-28 N71FF BFL → BFL Jun 28, 01:10 UTCJun 28, 02:14 UTC1h 5m
2026-06-27 N71FF BFL → BFL Jun 27, 17:49 UTCJun 27, 19:34 UTC1h 45m
2026-06-27 N71FF BFL → BFL Jun 27, 15:39 UTCJun 27, 17:25 UTC1h 45m
2026-06-27 N71FF BFL → BFL Jun 27, 04:00 UTCJun 27, 04:59 UTC1h 0m
2026-06-26 N71FF BFL → BFL Jun 26, 20:00 UTCJun 26, 20:44 UTC45m
2026-06-26 N71FF BFL → BFL Jun 26, 05:30 UTCJun 26, 06:09 UTC40m
2026-06-26 N71FF BFL → BFL Jun 26, 01:45 UTCJun 26, 02:40 UTC55m
2026-06-25 N71FF RBK → BFL Jun 25, 22:34 UTCJun 26, 00:10 UTC1h 35m
2026-06-25 N71FF - Jun 25, 18:45 UTCJun 25, 19:15 UTC30m

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 N71FF page for operator, model, and routing details .

Mode-S A97A37 frequently asked

What is Mode-S code A97A37?
A97A37 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N71FF.
Where is Mode-S A97A37 registered?
Mode-S code A97A37 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 A97A37 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A97A37, octal 52275067, decimal 11,106,871.
What flights does A97A37 operate?
Mode-S A97A37 has broadcast 1 distinct callsign, including N71FF.