Apparatus

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sensors Mode-S transponder

A373C0

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N321TR · BEECH F90 King Air · operated by VERTIVUE LLC

Hex
A373C0
Octal
50671700
Decimal
10,712,000
Country
US
Tail
N321TR
Type
BE9T
No current signal · last broadcast 18h ago
Flights observed
160
Distinct callsigns
1
Country
US
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S A373C0.

Country allocation

The ICAO 24-bit address A373C0 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
N321TR - 160 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N321TR - Jul 13, 13:15 UTCJul 13, 13:25 UTC10m
2026-07-13 N321TR - Jul 13, 12:15 UTCJul 13, 12:50 UTC35m
2026-07-13 N321TR - Jul 13, 10:55 UTCJul 13, 11:30 UTC35m
2026-07-12 N321TR - Jul 12, 20:20 UTCJul 12, 21:10 UTC50m
2026-07-12 N321TR - Jul 12, 18:35 UTCJul 12, 19:25 UTC50m
2026-07-11 N321TR - Jul 11, 15:05 UTCJul 11, 15:35 UTC30m
2026-07-11 N321TR - Jul 11, 13:00 UTCJul 11, 14:20 UTC1h 20m
2026-07-10 N321TR - Jul 10, 21:30 UTCJul 10, 22:50 UTC1h 20m
2026-07-10 N321TR - Jul 10, 19:00 UTCJul 10, 21:05 UTC2h 6m
2026-07-10 N321TR - Jul 10, 13:40 UTCJul 10, 17:40 UTC4h 0m
2026-07-09 N321TR - Jul 9, 20:25 UTCJul 9, 21:10 UTC45m
2026-07-09 N321TR - Jul 9, 18:45 UTCJul 9, 19:35 UTC50m
2026-07-09 N321TR ABE → RDG Jul 9, 18:10 UTCJul 9, 18:20 UTC10m
2026-07-09 N321TR - Jul 9, 03:10 UTCJul 9, 04:35 UTC1h 25m
2026-07-09 N321TR TEB → RDU Jul 9, 00:35 UTCJul 9, 02:25 UTC1h 50m
2026-07-08 N321TR - Jul 8, 21:40 UTCJul 8, 23:15 UTC1h 35m
2026-07-08 N321TR - Jul 8, 19:30 UTCJul 8, 21:05 UTC1h 35m
2026-07-06 N321TR - Jul 6, 14:55 UTCJul 6, 16:20 UTC1h 25m
2026-07-06 N321TR LDJ → MVY Jul 6, 12:55 UTCJul 6, 13:45 UTC50m
2026-07-06 N321TR - Jul 6, 10:15 UTCJul 6, 12:05 UTC1h 50m
2026-07-05 N321TR - Jul 5, 20:55 UTCJul 5, 21:40 UTC45m
2026-07-05 N321TR - Jul 5, 16:25 UTCJul 5, 19:00 UTC2h 35m
2026-07-05 N321TR - Jul 5, 15:40 UTCJul 5, 15:55 UTC15m
2026-07-05 N321TR - Jul 5, 14:10 UTCJul 5, 15:20 UTC1h 10m
2026-07-03 N321TR - Jul 3, 17:05 UTCJul 3, 17:55 UTC50m
2026-07-03 N321TR - Jul 3, 14:15 UTCJul 3, 15:45 UTC1h 30m
2026-07-02 N321TR - Jul 2, 22:00 UTCJul 2, 23:40 UTC1h 40m
2026-07-02 N321TR - Jul 2, 20:05 UTCJul 2, 21:15 UTC1h 10m
2026-07-02 N321TR - Jul 2, 13:00 UTCJul 2, 16:25 UTC3h 25m
2026-07-01 N321TR - Jul 1, 18:50 UTCJul 1, 21:20 UTC2h 30m
2026-07-01 N321TR - Jul 1, 13:50 UTCJul 1, 16:15 UTC2h 25m
2026-07-01 N321TR - Jul 1, 00:15 UTCJul 1, 00:55 UTC40m
2026-06-30 N321TR - Jun 30, 23:05 UTCJun 30, 23:50 UTC45m
2026-06-30 N321TR LDJ → TTN Jun 30, 20:25 UTCJun 30, 20:35 UTC10m
2026-06-30 N321TR - Jun 30, 18:45 UTCJun 30, 19:35 UTC50m
2026-06-30 N321TR - Jun 30, 17:25 UTCJun 30, 18:05 UTC40m
2026-06-30 N321TR - Jun 30, 00:14 UTCJun 30, 03:40 UTC3h 26m
2026-06-29 N321TR - Jun 29, 18:44 UTCJun 29, 22:44 UTC4h 0m
2026-06-29 N321TR - Jun 29, 17:49 UTCJun 29, 18:10 UTC20m
2026-06-27 N321TR - Jun 27, 15:49 UTCJun 27, 16:59 UTC1h 10m
2026-06-27 N321TR - Jun 27, 14:49 UTCJun 27, 15:05 UTC15m
2026-06-26 N321TR ABE → PVC Jun 26, 21:20 UTCJun 26, 22:19 UTC1h 0m
2026-06-26 N321TR - Jun 26, 20:04 UTCJun 26, 20:24 UTC20m
2026-06-26 N321TR - Jun 26, 19:35 UTCJun 26, 19:55 UTC20m
2026-06-26 N321TR - Jun 26, 02:34 UTCJun 26, 05:10 UTC2h 35m
2026-06-25 N321TR - Jun 25, 20:05 UTCJun 25, 21:55 UTC1h 50m
2026-06-25 N321TR - Jun 25, 18:19 UTCJun 25, 19:24 UTC1h 5m
2026-06-24 N321TR - Jun 24, 19:24 UTCJun 24, 19:39 UTC15m
2026-06-24 N321TR - Jun 24, 18:05 UTCJun 24, 18:50 UTC45m
2026-06-24 N321TR - Jun 24, 14:09 UTCJun 24, 14:50 UTC40m

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 N321TR page for operator, model, and routing details .

Mode-S A373C0 frequently asked

What is Mode-S code A373C0?
A373C0 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N321TR.
Where is Mode-S A373C0 registered?
Mode-S code A373C0 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 A373C0 broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A373C0, octal 50671700, decimal 10,712,000.
What flights does A373C0 operate?
Mode-S A373C0 has broadcast 1 distinct callsign, including N321TR.