Apparatus

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sensors Mode-S transponder

A1C0D1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2119E · CESSNA 172R Cutlass RG · operated by MID-ISLAND AIR SERVICE INC

Hex
A1C0D1
Octal
50340321
Decimal
10,600,657
Country
US
Tail
N2119E
Type
C72R
No current signal · last broadcast 14h ago
Flights observed
150
Distinct callsigns
1
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S A1C0D1.

Country allocation

The ICAO 24-bit address A1C0D1 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
N2119E - 150 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N2119E - Jul 13, 20:45 UTCJul 13, 21:25 UTC40m
2026-07-13 N2119E - Jul 13, 19:00 UTCJul 13, 19:45 UTC45m
2026-07-13 N2119E WSH → WSH Jul 13, 16:10 UTCJul 13, 16:45 UTC35m
2026-07-13 N2119E WSH → WSH Jul 13, 12:50 UTCJul 13, 13:45 UTC55m
2026-07-12 N2119E - Jul 12, 16:15 UTCJul 12, 17:15 UTC1h 0m
2026-07-12 N2119E WSH → WSH Jul 12, 13:55 UTCJul 12, 14:45 UTC50m
2026-07-11 N2119E - Jul 11, 13:50 UTCJul 11, 14:10 UTC20m
2026-07-10 N2119E WSH → WSH Jul 10, 14:40 UTCJul 10, 15:05 UTC25m
2026-07-09 N2119E WSH → WSH Jul 9, 16:40 UTCJul 9, 16:50 UTC10m
2026-07-08 N2119E - Jul 8, 16:05 UTCJul 8, 17:05 UTC1h 0m
2026-07-04 N2119E - Jul 4, 14:40 UTCJul 4, 15:40 UTC1h 0m
2026-07-03 N2119E WSH → WSH Jul 3, 19:45 UTCJul 3, 20:45 UTC1h 0m
2026-07-03 N2119E WSH → WSH Jul 3, 13:50 UTCJul 3, 14:40 UTC50m
2026-07-02 N2119E WSH → WSH Jul 2, 22:25 UTCJul 3, 00:00 UTC1h 35m
2026-07-02 N2119E WSH → WSH Jul 2, 14:35 UTCJul 2, 15:30 UTC55m
2026-07-02 N2119E WSH → WSH Jul 2, 12:45 UTCJul 2, 13:45 UTC1h 0m
2026-07-02 N2119E WSH → WSH Jul 2, 02:05 UTCJul 2, 03:25 UTC1h 20m
2026-07-01 N2119E - Jul 1, 23:00 UTCJul 1, 23:50 UTC50m
2026-07-01 N2119E WSH → WSH Jul 1, 18:55 UTCJul 1, 20:20 UTC1h 25m
2026-07-01 N2119E WSH → WSH Jul 1, 12:35 UTCJul 1, 13:35 UTC1h 0m
2026-06-30 N2119E WSH → WSH Jun 30, 14:45 UTCJun 30, 15:15 UTC30m
2026-06-30 N2119E WSH → WSH Jun 30, 02:05 UTCJun 30, 03:35 UTC1h 30m
2026-06-29 N2119E - Jun 29, 18:25 UTCJun 29, 19:39 UTC1h 15m
2026-06-29 N2119E - Jun 29, 13:04 UTCJun 29, 13:49 UTC45m
2026-06-28 N2119E - Jun 28, 20:29 UTCJun 28, 20:59 UTC30m
2026-06-28 N2119E - Jun 28, 14:59 UTCJun 28, 15:49 UTC50m
2026-06-28 N2119E - Jun 28, 12:44 UTCJun 28, 13:29 UTC45m
2026-06-27 N2119E - Jun 27, 19:19 UTCJun 27, 19:39 UTC20m
2026-06-27 N2119E - Jun 27, 15:34 UTCJun 27, 16:39 UTC1h 5m
2026-06-27 N2119E - Jun 27, 01:54 UTCJun 27, 03:15 UTC1h 20m
2026-06-26 N2119E - Jun 26, 14:35 UTCJun 26, 15:29 UTC55m
2026-06-25 N2119E - Jun 25, 22:49 UTCJun 25, 23:55 UTC1h 5m
2026-06-25 N2119E - Jun 25, 20:39 UTCJun 25, 21:15 UTC35m
2026-06-25 N2119E WSH → WSH Jun 25, 17:25 UTCJun 25, 18:19 UTC55m
2026-06-25 N2119E CTO → WSH Jun 25, 12:10 UTCJun 25, 13:29 UTC1h 20m
2026-06-24 N2119E - Jun 24, 22:35 UTCJun 24, 23:29 UTC55m
2026-06-24 N2119E HVN → WSH Jun 24, 19:10 UTCJun 24, 19:29 UTC20m
2026-06-24 N2119E - Jun 24, 16:59 UTCJun 24, 17:20 UTC20m
2026-06-24 N2119E - Jun 24, 14:29 UTCJun 24, 15:44 UTC1h 15m
2026-06-22 N2119E WSH → WSH Jun 22, 14:40 UTCJun 22, 15:29 UTC50m
2026-06-22 N2119E - Jun 22, 12:40 UTCJun 22, 13:49 UTC1h 10m
2026-06-21 N2119E WSH → WSH Jun 21, 18:35 UTCJun 21, 19:29 UTC55m
2026-06-21 N2119E WSH → WSH Jun 21, 14:40 UTCJun 21, 15:54 UTC1h 15m
2026-06-19 N2119E - Jun 19, 16:44 UTCJun 19, 17:44 UTC1h 0m
2026-06-19 N2119E - Jun 19, 14:59 UTCJun 19, 15:49 UTC50m
2026-06-17 N2119E WSH → WSH Jun 17, 17:40 UTCJun 17, 18:20 UTC40m
2026-06-17 N2119E - Jun 17, 14:20 UTCJun 17, 15:30 UTC1h 10m
2026-06-16 N2119E WSH → WSH Jun 16, 23:55 UTCJun 17, 01:05 UTC1h 10m
2026-06-16 N2119E WSH → WSH Jun 16, 18:50 UTCJun 16, 19:35 UTC45m
2026-06-16 N2119E WSH → WSH Jun 16, 16:55 UTCJun 16, 17:40 UTC45m

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 N2119E page for operator, model, and routing details .

Mode-S A1C0D1 frequently asked

What is Mode-S code A1C0D1?
A1C0D1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2119E.
Where is Mode-S A1C0D1 registered?
Mode-S code A1C0D1 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 A1C0D1 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1C0D1, octal 50340321, decimal 10,600,657.
What flights does A1C0D1 operate?
Mode-S A1C0D1 has broadcast 1 distinct callsign, including N2119E.