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sensors Mode-S transponder

AB5721

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N83MN · SCHLEICHER ASK-21 · operated by MINNESOTA SOARING CLUB

Hex
AB5721
Octal
52653441
Decimal
11,228,961
Country
US
Tail
N83MN
Type
AS21
No current signal · last broadcast 7h ago
Flights observed
67
Distinct callsigns
1
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S AB5721.

Country allocation

The ICAO 24-bit address AB5721 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
N83MN - 67 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N83MN - Jul 18, 18:25 UTCJul 18, 20:40 UTC2h 15m
2026-07-18 N83MN SYN → SYN Jul 18, 16:25 UTCJul 18, 16:40 UTC15m
2026-07-18 N83MN SYN → SYN Jul 18, 15:35 UTCJul 18, 15:50 UTC15m
2026-07-18 N83MN SYN → SYN Jul 18, 14:40 UTCJul 18, 14:55 UTC15m
2026-07-12 N83MN - Jul 12, 17:40 UTCJul 12, 18:35 UTC55m
2026-07-12 N83MN SYN → SYN Jul 12, 14:30 UTCJul 12, 16:20 UTC1h 50m
2026-07-11 N83MN - Jul 11, 18:20 UTCJul 11, 18:55 UTC35m
2026-07-11 N83MN - Jul 11, 17:25 UTCJul 11, 17:40 UTC15m
2026-07-11 N83MN - Jul 11, 14:10 UTCJul 11, 16:40 UTC2h 30m
2026-07-10 N83MN - Jul 10, 15:15 UTCJul 10, 15:30 UTC15m
2026-07-07 N83MN - Jul 7, 18:45 UTCJul 7, 19:45 UTC1h 0m
2026-07-07 N83MN - Jul 7, 17:30 UTCJul 7, 17:50 UTC20m
2026-07-07 N83MN - Jul 7, 16:10 UTCJul 7, 16:35 UTC25m
2026-07-05 N83MN SYN → SYN Jul 5, 17:10 UTCJul 5, 17:20 UTC10m
2026-07-05 N83MN SYN → SYN Jul 5, 15:05 UTCJul 5, 16:00 UTC55m
2026-06-30 N83MN SYN → SYN Jun 30, 16:10 UTCJun 30, 18:20 UTC2h 10m
2026-06-27 N83MN - Jun 27, 18:45 UTCJun 27, 21:10 UTC2h 25m
2026-06-27 N83MN - Jun 27, 17:29 UTCJun 27, 17:49 UTC20m
2026-06-27 N83MN - Jun 27, 16:35 UTCJun 27, 16:55 UTC20m
2026-06-27 N83MN - Jun 27, 15:34 UTCJun 27, 15:55 UTC20m
2026-06-27 N83MN - Jun 27, 14:35 UTCJun 27, 14:45 UTC10m
2026-06-24 N83MN SYN → SYN Jun 24, 15:05 UTCJun 24, 21:40 UTC6h 35m
2026-06-23 N83MN - Jun 23, 18:50 UTCJun 23, 19:04 UTC15m
2026-06-23 N83MN - Jun 23, 17:30 UTCJun 23, 17:50 UTC20m
2026-06-23 N83MN - Jun 23, 16:14 UTCJun 23, 16:29 UTC15m
2026-06-23 N83MN - Jun 23, 15:19 UTCJun 23, 15:30 UTC10m
2026-06-21 N83MN SYN → SYN Jun 21, 16:19 UTCJun 21, 16:30 UTC10m
2026-06-21 N83MN - Jun 21, 14:30 UTCJun 21, 15:30 UTC1h 0m
2026-06-20 N83MN - Jun 20, 20:14 UTCJun 20, 21:10 UTC55m
2026-06-20 N83MN - Jun 20, 17:54 UTCJun 20, 19:40 UTC1h 45m
2026-06-20 N83MN - Jun 20, 14:50 UTCJun 20, 16:29 UTC1h 40m
2026-06-09 N83MN - Jun 9, 19:30 UTCJun 9, 19:50 UTC20m
2026-06-09 N83MN SYN → SYN Jun 9, 18:05 UTCJun 9, 18:40 UTC35m
2026-06-07 N83MN SYN → SYN Jun 7, 14:50 UTCJun 7, 17:45 UTC2h 55m
2026-06-06 N83MN - Jun 6, 20:55 UTCJun 6, 22:39 UTC1h 45m
2026-06-06 N83MN - Jun 6, 19:50 UTCJun 6, 20:10 UTC20m
2026-06-06 N83MN - Jun 6, 18:19 UTCJun 6, 18:50 UTC30m
2026-06-06 N83MN - Jun 6, 14:50 UTCJun 6, 17:19 UTC2h 30m
2026-06-02 N83MN - Jun 2, 19:55 UTCJun 2, 22:00 UTC2h 5m
2026-06-02 N83MN - Jun 2, 18:10 UTCJun 2, 18:40 UTC30m
2026-06-02 N83MN - Jun 2, 15:20 UTCJun 2, 17:10 UTC1h 50m
2026-05-30 N83MN - May 30, 14:45 UTCMay 30, 15:00 UTC15m
2026-05-26 N83MN - May 26, 17:44 UTCMay 26, 19:30 UTC1h 45m
2026-05-26 N83MN - May 26, 16:10 UTCMay 26, 16:30 UTC20m
2026-05-26 N83MN SYN → SYN May 26, 15:20 UTCMay 26, 15:35 UTC15m
2026-05-23 N83MN SYN → SYN May 23, 15:50 UTCMay 23, 19:40 UTC3h 51m
2026-05-16 N83MN - May 16, 18:30 UTCMay 16, 19:20 UTC50m
2026-05-16 N83MN SYN → SYN May 16, 16:50 UTCMay 16, 17:30 UTC40m
2026-05-16 N83MN SYN → SYN May 16, 14:31 UTCMay 16, 16:05 UTC1h 35m
2026-05-15 N83MN - May 15, 19:15 UTCMay 15, 21:45 UTC2h 30m

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 N83MN page for operator, model, and routing details .

Mode-S AB5721 frequently asked

What is Mode-S code AB5721?
AB5721 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N83MN.
Where is Mode-S AB5721 registered?
Mode-S code AB5721 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 AB5721 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB5721, octal 52653441, decimal 11,228,961.
What flights does AB5721 operate?
Mode-S AB5721 has broadcast 1 distinct callsign, including N83MN.