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sensors Mode-S transponder

A0D4C2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N15255 · CESSNA 172 Skyhawk · operated by ELIZABETH CITY STATE UNIVERSITY

Hex
A0D4C2
Octal
50152302
Decimal
10,540,226
Country
US
Tail
N15255
Type
C172
Broadcasting now · callsign N15255 · 3,425 ft
Flights observed
188
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Current position

A0D4C2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A0D4C2 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
N15255 - 188 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N15255 - Jul 14, 17:40 UTCJul 14, 18:30 UTC50m
2026-07-14 N15255 - Jul 14, 15:50 UTCJul 14, 16:50 UTC1h 0m
2026-07-14 N15255 - Jul 14, 14:25 UTCJul 14, 14:50 UTC25m
2026-07-14 N15255 - Jul 14, 12:50 UTCJul 14, 13:45 UTC55m
2026-07-13 N15255 - Jul 13, 20:05 UTCJul 13, 21:30 UTC1h 25m
2026-07-13 N15255 - Jul 13, 17:40 UTCJul 13, 18:25 UTC45m
2026-07-13 N15255 - Jul 13, 15:15 UTCJul 13, 16:45 UTC1h 30m
2026-07-10 N15255 - Jul 10, 21:45 UTCJul 10, 22:05 UTC20m
2026-07-10 N15255 - Jul 10, 20:35 UTCJul 10, 21:15 UTC40m
2026-07-10 N15255 - Jul 10, 17:35 UTCJul 10, 18:50 UTC1h 15m
2026-07-10 N15255 - Jul 10, 12:45 UTCJul 10, 15:45 UTC3h 0m
2026-07-09 N15255 - Jul 9, 21:35 UTCJul 9, 21:45 UTC10m
2026-07-09 N15255 - Jul 9, 17:35 UTCJul 9, 18:45 UTC1h 10m
2026-07-09 N15255 - Jul 9, 14:30 UTCJul 9, 14:55 UTC25m
2026-07-08 N15255 - Jul 8, 15:40 UTCJul 8, 16:30 UTC50m
2026-07-06 N15255 - Jul 6, 17:45 UTCJul 6, 18:35 UTC50m
2026-07-06 N15255 - Jul 6, 15:20 UTCJul 6, 16:45 UTC1h 25m
2026-07-06 N15255 ECG → ECG Jul 6, 12:35 UTCJul 6, 13:25 UTC50m
2026-07-04 N15255 - Jul 4, 01:10 UTCJul 4, 04:55 UTC3h 45m
2026-07-02 N15255 ECG → ECG Jul 2, 17:40 UTCJul 2, 17:55 UTC15m
2026-07-02 N15255 - Jul 2, 15:30 UTCJul 2, 16:40 UTC1h 10m
2026-07-02 N15255 - Jul 2, 12:50 UTCJul 2, 14:05 UTC1h 15m
2026-07-01 N15255 - Jul 1, 22:10 UTCJul 1, 22:30 UTC20m
2026-07-01 N15255 - Jul 1, 19:30 UTCJul 1, 20:30 UTC1h 0m
2026-07-01 N15255 - Jul 1, 18:00 UTCJul 1, 18:50 UTC50m
2026-07-01 N15255 - Jul 1, 14:35 UTCJul 1, 16:35 UTC2h 0m
2026-06-30 N15255 - Jun 30, 23:10 UTCJul 1, 00:20 UTC1h 10m
2026-06-30 N15255 - Jun 30, 20:40 UTCJun 30, 21:25 UTC45m
2026-06-30 N15255 - Jun 30, 19:40 UTCJun 30, 19:55 UTC15m
2026-06-30 N15255 - Jun 30, 17:40 UTCJun 30, 18:40 UTC1h 0m
2026-06-30 N15255 ECG → ECG Jun 30, 16:30 UTCJun 30, 16:55 UTC25m
2026-06-30 N15255 - Jun 30, 14:35 UTCJun 30, 15:55 UTC1h 20m
2026-06-30 N15255 - Jun 30, 12:40 UTCJun 30, 13:55 UTC1h 15m
2026-06-29 N15255 - Jun 29, 18:39 UTCJun 29, 19:00 UTC20m
2026-06-29 N15255 - Jun 29, 14:25 UTCJun 29, 16:10 UTC1h 45m
2026-06-27 N15255 ECG → ECG Jun 27, 14:25 UTCJun 27, 15:45 UTC1h 20m
2026-06-26 N15255 - Jun 26, 17:40 UTCJun 26, 17:59 UTC20m
2026-06-26 N15255 - Jun 26, 14:50 UTCJun 26, 16:24 UTC1h 35m
2026-06-26 N15255 - Jun 26, 12:44 UTCJun 26, 13:59 UTC1h 15m
2026-06-25 N15255 - Jun 25, 21:55 UTCJun 25, 22:49 UTC55m
2026-06-25 N15255 - Jun 25, 19:29 UTCJun 25, 20:54 UTC1h 25m
2026-06-25 N15255 - Jun 25, 17:39 UTCJun 25, 18:24 UTC45m
2026-06-25 N15255 - Jun 25, 14:29 UTCJun 25, 15:59 UTC1h 30m
2026-06-25 N15255 - Jun 25, 12:50 UTCJun 25, 13:24 UTC35m
2026-06-24 N15255 - Jun 24, 20:20 UTCJun 24, 21:34 UTC1h 15m
2026-06-24 N15255 - Jun 24, 17:34 UTCJun 24, 18:20 UTC45m
2026-06-24 N15255 - Jun 24, 15:00 UTCJun 24, 15:59 UTC1h 0m
2026-06-24 N15255 - Jun 24, 12:50 UTCJun 24, 13:54 UTC1h 5m
2026-06-23 N15255 - Jun 23, 16:59 UTCJun 23, 17:25 UTC25m
2026-06-23 N15255 - Jun 23, 13:05 UTCJun 23, 13:29 UTC25m

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 N15255 page for operator, model, and routing details .

Mode-S A0D4C2 frequently asked

What is Mode-S code A0D4C2?
A0D4C2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N15255.
Where is Mode-S A0D4C2 registered?
Mode-S code A0D4C2 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 A0D4C2 broadcasting right now?
Yes. Mode-S A0D4C2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0D4C2, octal 50152302, decimal 10,540,226.
What flights does A0D4C2 operate?
Mode-S A0D4C2 has broadcast 1 distinct callsign, including N15255.