Apparatus

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sensors Mode-S transponder

A9BF2B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N727SP · CESSNA 172 Skyhawk · operated by ELITE APPROACH LLC

Hex
A9BF2B
Octal
52337453
Decimal
11,124,523
Country
US
Tail
N727SP
Type
C172
No current signal · last broadcast 10h ago
Flights observed
153
Distinct callsigns
1
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S A9BF2B.

Country allocation

The ICAO 24-bit address A9BF2B 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
N727SP - 153 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N727SP - Jul 13, 22:30 UTCJul 13, 23:30 UTC1h 0m
2026-07-13 N727SP - Jul 13, 20:05 UTCJul 13, 20:55 UTC50m
2026-07-13 N727SP SUS → SUS Jul 13, 17:50 UTCJul 13, 18:20 UTC30m
2026-07-13 N727SP - Jul 13, 15:55 UTCJul 13, 16:50 UTC55m
2026-07-13 N727SP - Jul 13, 13:35 UTCJul 13, 14:40 UTC1h 5m
2026-07-10 N727SP - Jul 10, 18:55 UTCJul 10, 20:55 UTC2h 0m
2026-07-10 N727SP - Jul 10, 16:00 UTCJul 10, 16:50 UTC50m
2026-07-10 N727SP - Jul 10, 13:50 UTCJul 10, 14:40 UTC50m
2026-07-09 N727SP - Jul 9, 23:05 UTCJul 10, 00:35 UTC1h 30m
2026-07-09 N727SP - Jul 9, 19:40 UTCJul 9, 20:10 UTC30m
2026-07-09 N727SP - Jul 9, 15:35 UTCJul 9, 16:40 UTC1h 5m
2026-07-09 N727SP SUS → SUS Jul 9, 13:30 UTCJul 9, 14:25 UTC55m
2026-07-08 N727SP - Jul 8, 21:35 UTCJul 8, 22:30 UTC55m
2026-07-08 N727SP - Jul 8, 20:00 UTCJul 8, 20:45 UTC45m
2026-07-08 N727SP - Jul 8, 17:50 UTCJul 8, 18:35 UTC45m
2026-07-08 N727SP SUS → SUS Jul 8, 15:30 UTCJul 8, 16:40 UTC1h 10m
2026-07-08 N727SP - Jul 8, 13:45 UTCJul 8, 14:20 UTC35m
2026-07-07 N727SP - Jul 7, 21:45 UTCJul 7, 22:30 UTC45m
2026-07-07 N727SP SUS → SUS Jul 7, 19:50 UTCJul 7, 20:55 UTC1h 5m
2026-07-07 N727SP - Jul 7, 17:45 UTCJul 7, 18:45 UTC1h 0m
2026-07-07 N727SP - Jul 7, 15:30 UTCJul 7, 16:15 UTC45m
2026-07-07 N727SP - Jul 7, 13:50 UTCJul 7, 14:50 UTC1h 0m
2026-07-07 N727SP SUS → SUS Jul 7, 02:05 UTCJul 7, 04:40 UTC2h 35m
2026-07-06 N727SP SUS → SUS Jul 6, 21:20 UTCJul 6, 22:30 UTC1h 10m
2026-07-06 N727SP - Jul 6, 17:35 UTCJul 6, 18:50 UTC1h 15m
2026-07-03 N727SP SUS → SUS Jul 3, 15:45 UTCJul 3, 16:40 UTC55m
2026-07-03 N727SP - Jul 3, 13:35 UTCJul 3, 14:30 UTC55m
2026-07-02 N727SP - Jul 2, 20:45 UTCJul 2, 21:15 UTC30m
2026-07-02 N727SP - Jul 2, 19:35 UTCJul 2, 20:10 UTC35m
2026-07-01 N727SP - Jul 1, 21:40 UTCJul 1, 22:45 UTC1h 5m
2026-07-01 N727SP - Jul 1, 19:40 UTCJul 1, 20:50 UTC1h 10m
2026-07-01 N727SP - Jul 1, 17:40 UTCJul 1, 18:40 UTC1h 0m
2026-07-01 N727SP - Jul 1, 15:50 UTCJul 1, 16:40 UTC50m
2026-06-30 N727SP SUS → SUS Jun 30, 22:15 UTCJun 30, 23:15 UTC1h 0m
2026-06-30 N727SP - Jun 30, 21:05 UTCJun 30, 21:15 UTC10m
2026-06-30 N727SP - Jun 30, 19:45 UTCJun 30, 20:20 UTC35m
2026-06-30 N727SP - Jun 30, 18:05 UTCJun 30, 18:50 UTC45m
2026-06-30 N727SP - Jun 30, 16:25 UTCJun 30, 16:50 UTC25m
2026-06-30 N727SP - Jun 30, 13:35 UTCJun 30, 15:00 UTC1h 25m
2026-06-29 N727SP - Jun 29, 21:44 UTCJun 29, 22:55 UTC1h 10m
2026-06-29 N727SP - Jun 29, 19:24 UTCJun 29, 20:15 UTC50m
2026-06-29 N727SP - Jun 29, 17:24 UTCJun 29, 18:34 UTC1h 10m
2026-06-29 N727SP SUS → SUS Jun 29, 15:34 UTCJun 29, 16:29 UTC55m
2026-06-25 N727SP SUS → SUS Jun 25, 18:00 UTCJun 25, 18:34 UTC35m
2026-06-24 N727SP - Jun 24, 17:59 UTCJun 24, 19:15 UTC1h 15m
2026-06-24 N727SP - Jun 24, 15:29 UTCJun 24, 16:40 UTC1h 10m
2026-06-23 N727SP - Jun 23, 23:14 UTCJun 23, 23:39 UTC25m
2026-06-23 N727SP - Jun 23, 21:59 UTCJun 23, 22:29 UTC30m
2026-06-23 N727SP - Jun 23, 17:44 UTCJun 23, 19:10 UTC1h 25m
2026-06-23 N727SP - Jun 23, 15:19 UTCJun 23, 16:29 UTC1h 10m

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 N727SP page for operator, model, and routing details .

Mode-S A9BF2B frequently asked

What is Mode-S code A9BF2B?
A9BF2B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N727SP.
Where is Mode-S A9BF2B registered?
Mode-S code A9BF2B 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 A9BF2B broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9BF2B, octal 52337453, decimal 11,124,523.
What flights does A9BF2B operate?
Mode-S A9BF2B has broadcast 1 distinct callsign, including N727SP.