sensors Mode-S transponder

A1CC84

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N215EL · operated by CIRRUS AVIATION INC

Hex
A1CC84
Octal
50346204
Decimal
10,603,652
Country
US
Tail
N215EL
Type
PIAT
Broadcasting now · callsign N215EL · 2,975 ft
Flights observed
7
Distinct callsigns
1
Country
US
Last broadcast
23h ago

Current position

A1CC84 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A1CC84 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
N215EL - 7 2026-04-13

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 N215EL - Apr 13, 22:50 UTCApr 13, 23:40 UTC50m
2026-04-13 N215EL - Apr 13, 20:10 UTCApr 13, 20:35 UTC25m
2026-04-13 N215EL - Apr 13, 16:15 UTCApr 13, 17:15 UTC1h 0m
2026-04-13 N215EL - Apr 13, 15:50 UTCApr 13, 17:15 UTC1h 25m
2026-04-13 N215EL - Apr 13, 14:25 UTCApr 13, 16:15 UTC1h 50m
2026-04-13 N215EL - Apr 13, 11:55 UTCApr 13, 12:20 UTC25m
2026-04-13 N215EL - Apr 13, 11:25 UTCApr 13, 12:15 UTC50m

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 N215EL page for operator, model, and routing details .

Mode-S A1CC84 frequently asked

What is Mode-S code A1CC84?
A1CC84 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N215EL.
Where is Mode-S A1CC84 registered?
Mode-S code A1CC84 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 A1CC84 broadcasting right now?
Yes. Mode-S A1CC84 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1CC84, octal 50346204, decimal 10,603,652.
What flights does A1CC84 operate?
Mode-S A1CC84 has broadcast 1 distinct callsign, including N215EL.