Apparatus

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sensors Mode-S transponder

AB1C63

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N815ER · CESSNA 172 Skyhawk · operated by EMBRY-RIDDLE AERONAUTICAL UNIVERSITY

Hex
AB1C63
Octal
52616143
Decimal
11,213,923
Country
US
Tail
N815ER
Type
C172
Transponder active on ground
Flights observed
26
Distinct callsigns
1
Country
US
Last broadcast
51m ago

Last known position

Most recent position reported by Mode-S AB1C63.

Country allocation

The ICAO 24-bit address AB1C63 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
ERU815 - 26 2026-04-18

Recent flights last 26

DateFlightRouteTakeoffLandingDuration
2026-04-18 ERU815 - Apr 18, 15:20 UTCApr 18, 16:45 UTC1h 25m
2026-04-18 ERU815 - Apr 18, 12:50 UTCApr 18, 14:05 UTC1h 15m
2026-04-17 ERU815 - Apr 17, 23:25 UTCApr 18, 00:30 UTC1h 5m
2026-04-17 ERU815 - Apr 17, 23:10 UTCApr 17, 23:20 UTC10m
2026-04-17 ERU815 - Apr 17, 19:05 UTCApr 17, 19:20 UTC15m
2026-04-17 ERU815 - Apr 17, 13:20 UTCApr 17, 14:50 UTC1h 30m
2026-04-16 ERU815 - Apr 16, 21:14 UTCApr 16, 22:34 UTC1h 20m
2026-04-16 ERU815 - Apr 16, 19:15 UTCApr 16, 19:30 UTC15m
2026-04-16 ERU815 - Apr 16, 17:40 UTCApr 16, 19:10 UTC1h 30m
2026-04-16 ERU815 - Apr 16, 15:15 UTCApr 16, 15:35 UTC20m
2026-04-16 ERU815 - Apr 16, 14:55 UTCApr 16, 15:10 UTC15m
2026-04-16 ERU815 - Apr 16, 13:15 UTCApr 16, 13:40 UTC25m
2026-04-16 ERU815 - Apr 16, 12:19 UTCApr 16, 13:05 UTC45m
2026-04-15 ERU815 - Apr 15, 21:05 UTCApr 15, 21:35 UTC30m
2026-04-15 ERU815 - Apr 15, 20:20 UTCApr 15, 21:00 UTC40m
2026-04-15 ERU815 - Apr 15, 17:20 UTCApr 15, 17:30 UTC10m
2026-04-15 ERU815 - Apr 15, 13:20 UTCApr 15, 13:55 UTC35m
2026-04-14 ERU815 - Apr 14, 21:45 UTCApr 14, 22:05 UTC20m
2026-04-14 ERU815 - Apr 14, 20:35 UTCApr 14, 20:50 UTC15m
2026-04-14 ERU815 - Apr 14, 18:55 UTCApr 14, 19:10 UTC15m
2026-04-14 ERU815 - Apr 14, 18:10 UTCApr 14, 18:45 UTC35m
2026-04-14 ERU815 - Apr 14, 15:15 UTCApr 14, 16:10 UTC55m
2026-04-13 ERU815 - Apr 13, 18:40 UTCApr 13, 18:50 UTC10m
2026-04-13 ERU815 - Apr 13, 17:35 UTCApr 13, 18:00 UTC25m
2026-04-12 ERU815 - Apr 12, 19:55 UTCApr 12, 20:10 UTC15m
2026-04-12 ERU815 - Apr 12, 17:15 UTCApr 12, 17:25 UTC10m

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 N815ER page for operator, model, and routing details .

Mode-S AB1C63 frequently asked

What is Mode-S code AB1C63?
AB1C63 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N815ER.
Where is Mode-S AB1C63 registered?
Mode-S code AB1C63 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 AB1C63 broadcasting right now?
Mode-S AB1C63 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB1C63, octal 52616143, decimal 11,213,923.
What flights does AB1C63 operate?
Mode-S AB1C63 has broadcast 1 distinct callsign, including ERU815.