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sensors Mode-S transponder

A2A81A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N270SP · CESSNA T206 Turbo Stationair · operated by TEXTRON AVIATION INC

Hex
A2A81A
Octal
50524032
Decimal
10,659,866
Country
US
Tail
N270SP
Type
T206
No current signal · last broadcast Jul 24, 23:45 UTC
Flights observed
47
Distinct callsigns
1
Country
US
Last broadcast
Jul 24, 23:45 UTC

Last known position

Most recent position reported by Mode-S A2A81A.

Country allocation

The ICAO 24-bit address A2A81A 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
N270SP - 47 2026-07-24

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-07-24 N270SP - Jul 24, 22:10 UTCJul 24, 23:45 UTC1h 35m
2026-07-24 N270SP - Jul 24, 15:30 UTCJul 24, 17:20 UTC1h 50m
2026-07-19 N270SP - Jul 19, 19:50 UTCJul 19, 22:10 UTC2h 20m
2026-07-19 N270SP - Jul 19, 18:45 UTCJul 19, 18:55 UTC10m
2026-07-19 N270SP - Jul 19, 16:10 UTCJul 19, 16:30 UTC20m
2026-07-19 N270SP - Jul 19, 14:00 UTCJul 19, 14:50 UTC50m
2026-07-19 N270SP - Jul 19, 12:45 UTCJul 19, 13:25 UTC40m
2026-07-13 N270SP - Jul 13, 23:30 UTCJul 14, 00:05 UTC35m
2026-07-13 N270SP - Jul 13, 21:55 UTCJul 13, 22:15 UTC20m
2026-07-13 N270SP - Jul 13, 20:50 UTCJul 13, 21:00 UTC10m
2026-07-13 N270SP - Jul 13, 19:55 UTCJul 13, 20:10 UTC15m
2026-07-13 N270SP - Jul 13, 18:10 UTCJul 13, 19:15 UTC1h 5m
2026-07-13 N270SP - Jul 13, 16:20 UTCJul 13, 16:40 UTC20m
2026-07-13 N270SP - Jul 13, 15:55 UTCJul 13, 16:10 UTC15m
2026-07-12 N270SP - Jul 12, 22:05 UTCJul 12, 22:20 UTC15m
2026-07-12 N270SP - Jul 12, 19:20 UTCJul 12, 19:35 UTC15m
2026-07-12 N270SP - Jul 12, 18:15 UTCJul 12, 18:30 UTC15m
2026-07-11 N270SP - Jul 11, 21:40 UTCJul 11, 23:30 UTC1h 50m
2026-07-09 N270SP - Jul 9, 19:40 UTCJul 9, 20:40 UTC1h 0m
2026-07-08 N270SP - Jul 8, 23:40 UTCJul 9, 01:30 UTC1h 50m
2026-07-08 N270SP - Jul 8, 22:25 UTCJul 8, 23:05 UTC40m
2026-07-08 N270SP - Jul 8, 21:05 UTCJul 8, 21:35 UTC30m
2026-07-08 N270SP - Jul 8, 18:45 UTCJul 8, 19:25 UTC40m
2026-07-02 N270SP - Jul 2, 21:50 UTCJul 2, 22:30 UTC40m
2026-07-02 N270SP - Jul 2, 12:20 UTCJul 2, 12:55 UTC35m
2026-06-30 N270SP - Jun 30, 20:30 UTCJun 30, 21:50 UTC1h 20m
2026-06-30 N270SP - Jun 30, 17:35 UTCJun 30, 19:05 UTC1h 30m
2026-06-28 N270SP - Jun 28, 23:20 UTCJun 29, 00:29 UTC1h 10m
2026-06-28 N270SP - Jun 28, 21:04 UTCJun 28, 22:49 UTC1h 45m
2026-06-16 N270SP - Jun 16, 19:19 UTCJun 16, 20:15 UTC56m
2026-06-16 N270SP - Jun 16, 17:55 UTCJun 16, 18:45 UTC50m
2026-06-13 N270SP - Jun 13, 14:40 UTCJun 13, 17:50 UTC3h 10m
2026-06-13 N270SP - Jun 13, 12:30 UTCJun 13, 13:40 UTC1h 10m
2026-06-08 N270SP - Jun 8, 20:05 UTCJun 8, 20:15 UTC10m
2026-06-08 N270SP - Jun 8, 18:00 UTCJun 8, 18:20 UTC20m
2026-06-06 N270SP - Jun 6, 23:05 UTCJun 7, 00:19 UTC1h 15m
2026-06-06 N270SP - Jun 6, 21:04 UTCJun 6, 22:15 UTC1h 10m
2026-06-03 N270SP - Jun 3, 22:05 UTCJun 4, 00:10 UTC2h 5m
2026-06-01 N270SP - Jun 1, 23:25 UTCJun 2, 00:30 UTC1h 5m
2026-06-01 N270SP - Jun 1, 20:35 UTCJun 1, 22:35 UTC2h 0m
2026-06-01 N270SP - Jun 1, 18:50 UTCJun 1, 19:40 UTC50m
2026-05-28 N270SP - May 28, 15:10 UTCMay 28, 18:05 UTC2h 55m
2026-05-28 N270SP - May 28, 12:50 UTCMay 28, 13:55 UTC1h 5m
2026-05-25 N270SP - May 25, 18:10 UTCMay 25, 19:10 UTC1h 0m
2026-05-25 N270SP - May 25, 15:30 UTCMay 25, 17:05 UTC1h 35m
2026-05-25 N270SP - May 25, 14:15 UTCMay 25, 14:40 UTC25m
2026-05-02 N270SP - May 2, 22:20 UTCMay 3, 00:10 UTC1h 50m

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 N270SP page for operator, model, and routing details .

Mode-S A2A81A frequently asked

What is Mode-S code A2A81A?
A2A81A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N270SP.
Where is Mode-S A2A81A registered?
Mode-S code A2A81A 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 A2A81A broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 23:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2A81A, octal 50524032, decimal 10,659,866.
What flights does A2A81A operate?
Mode-S A2A81A has broadcast 1 distinct callsign, including N270SP.