Apparatus

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sensors Mode-S transponder

A20A11

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N230SA · operated by TEXTRON AVIATION INC

Hex
A20A11
Octal
50405021
Decimal
10,619,409
Country
US
Tail
N230SA
Type
C172
No current signal · last broadcast 2d ago
Flights observed
139
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A20A11.

Country allocation

The ICAO 24-bit address A20A11 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
N230SA - 139 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 N230SA - Jul 12, 13:35 UTCJul 12, 14:20 UTC45m
2026-07-11 N230SA - Jul 11, 22:55 UTCJul 11, 23:40 UTC45m
2026-07-11 N230SA - Jul 11, 21:40 UTCJul 11, 22:20 UTC40m
2026-07-11 N230SA ADS → ADS Jul 11, 20:45 UTCJul 11, 21:00 UTC15m
2026-07-10 N230SA ADS → ADS Jul 10, 18:50 UTCJul 10, 19:40 UTC50m
2026-07-10 N230SA - Jul 10, 15:25 UTCJul 10, 17:10 UTC1h 45m
2026-07-09 N230SA - Jul 9, 17:30 UTCJul 9, 18:10 UTC40m
2026-07-09 N230SA - Jul 9, 15:55 UTCJul 9, 16:55 UTC1h 0m
2026-07-05 N230SA - Jul 5, 14:05 UTCJul 5, 14:55 UTC50m
2026-07-04 N230SA - Jul 4, 15:35 UTCJul 4, 16:05 UTC30m
2026-07-04 N230SA - Jul 4, 13:45 UTCJul 4, 14:15 UTC30m
2026-07-02 N230SA TRL → ADS Jul 2, 21:55 UTCJul 2, 22:50 UTC55m
2026-07-02 N230SA - Jul 2, 20:50 UTCJul 2, 21:20 UTC30m
2026-07-01 N230SA - Jul 1, 16:00 UTCJul 1, 18:20 UTC2h 20m
2026-07-01 N230SA ACT → ADS Jul 1, 00:20 UTCJul 1, 01:05 UTC45m
2026-06-30 N230SA - Jun 30, 23:05 UTCJun 30, 23:50 UTC45m
2026-06-28 N230SA ADS → ADS Jun 28, 15:14 UTCJun 28, 16:05 UTC50m
2026-06-27 N230SA - Jun 27, 21:25 UTCJun 27, 22:09 UTC45m
2026-06-27 N230SA GVT → ADS Jun 27, 17:59 UTCJun 27, 18:29 UTC30m
2026-06-27 N230SA - Jun 27, 16:55 UTCJun 27, 17:25 UTC30m
2026-06-27 N230SA - Jun 27, 13:35 UTCJun 27, 14:29 UTC55m
2026-06-25 N230SA - Jun 25, 19:44 UTCJun 25, 20:14 UTC30m
2026-06-25 N230SA - Jun 25, 17:54 UTCJun 25, 18:45 UTC50m
2026-06-25 N230SA - Jun 25, 13:35 UTCJun 25, 13:59 UTC25m
2026-06-25 N230SA - Jun 25, 00:09 UTCJun 25, 02:45 UTC2h 35m
2026-06-23 N230SA ADS → ADS Jun 23, 17:34 UTCJun 23, 18:39 UTC1h 5m
2026-06-23 N230SA - Jun 23, 15:19 UTCJun 23, 16:05 UTC45m
2026-06-22 N230SA - Jun 22, 20:14 UTCJun 22, 21:54 UTC1h 40m
2026-06-22 N230SA ADS → ACT Jun 22, 18:19 UTCJun 22, 19:19 UTC1h 0m
2026-06-21 N230SA ADS → ADS Jun 21, 15:15 UTCJun 21, 16:10 UTC55m
2026-06-21 N230SA - Jun 21, 13:24 UTCJun 21, 14:19 UTC55m
2026-06-21 N230SA - Jun 21, 04:34 UTCJun 21, 05:30 UTC55m
2026-06-21 N230SA - Jun 21, 02:55 UTCJun 21, 03:25 UTC30m
2026-06-18 N230SA ADS → ADS Jun 18, 14:50 UTCJun 18, 16:20 UTC1h 30m
2026-06-18 N230SA - Jun 18, 01:25 UTCJun 18, 03:00 UTC1h 35m
2026-06-17 N230SA - Jun 17, 23:15 UTCJun 18, 00:35 UTC1h 20m
2026-06-17 N230SA - Jun 17, 16:05 UTCJun 17, 17:55 UTC1h 50m
2026-06-17 N230SA ADS → ADS Jun 17, 00:40 UTCJun 17, 02:55 UTC2h 15m
2026-06-16 N230SA - Jun 16, 21:20 UTCJun 16, 23:20 UTC2h 0m
2026-06-16 N230SA - Jun 16, 16:00 UTCJun 16, 17:30 UTC1h 30m
2026-06-15 N230SA - Jun 15, 19:30 UTCJun 15, 20:50 UTC1h 20m
2026-06-15 N230SA - Jun 15, 15:59 UTCJun 15, 17:25 UTC1h 25m
2026-06-14 N230SA - Jun 14, 02:40 UTCJun 14, 03:40 UTC1h 0m
2026-06-13 N230SA - Jun 13, 19:25 UTCJun 13, 20:30 UTC1h 5m
2026-06-13 N230SA GVT → ADS Jun 13, 15:40 UTCJun 13, 16:15 UTC35m
2026-06-13 N230SA - Jun 13, 14:00 UTCJun 13, 14:30 UTC30m
2026-06-13 N230SA - Jun 13, 02:55 UTCJun 13, 03:25 UTC30m
2026-06-11 N230SA - Jun 11, 19:55 UTCJun 11, 20:20 UTC25m
2026-06-11 N230SA - Jun 11, 14:20 UTCJun 11, 15:05 UTC45m
2026-06-10 N230SA - Jun 10, 23:50 UTCJun 11, 01:15 UTC1h 25m

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 N230SA page for operator, model, and routing details .

Mode-S A20A11 frequently asked

What is Mode-S code A20A11?
A20A11 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N230SA.
Where is Mode-S A20A11 registered?
Mode-S code A20A11 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 A20A11 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A20A11, octal 50405021, decimal 10,619,409.
What flights does A20A11 operate?
Mode-S A20A11 has broadcast 1 distinct callsign, including N230SA.