sensors Mode-S transponder

A8A2DD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N65587 · CESSNA 172 Skyhawk · operated by WINGS OVER TEXAS HOLDINGS LLC

Hex
A8A2DD
Octal
52121335
Decimal
11,051,741
Country
US
Tail
N65587
Type
C172
Broadcasting now · callsign N65587 · 1,500 ft
Flights observed
7
Distinct callsigns
1
Country
US
Last broadcast
22h ago

Current position

A8A2DD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8A2DD 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
N65587 - 7 2026-04-14

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-14 N65587 - Apr 14, 05:15 UTCApr 14, 05:30 UTC15m
2026-04-13 N65587 - Apr 13, 21:30 UTCApr 13, 22:55 UTC1h 25m
2026-04-13 N65587 - Apr 13, 19:50 UTCApr 13, 20:20 UTC30m
2026-04-13 N65587 - Apr 13, 18:20 UTCApr 13, 20:10 UTC1h 50m
2026-04-13 N65587 - Apr 13, 16:15 UTCApr 13, 17:10 UTC55m
2026-04-13 N65587 - Apr 13, 15:50 UTCApr 13, 17:10 UTC1h 20m
2026-04-13 N65587 - Apr 13, 15:10 UTCApr 13, 16:15 UTC1h 5m

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 N65587 page for operator, model, and routing details .

Mode-S A8A2DD frequently asked

What is Mode-S code A8A2DD?
A8A2DD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N65587.
Where is Mode-S A8A2DD registered?
Mode-S code A8A2DD 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 A8A2DD broadcasting right now?
Yes. Mode-S A8A2DD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8A2DD, octal 52121335, decimal 11,051,741.
What flights does A8A2DD operate?
Mode-S A8A2DD has broadcast 1 distinct callsign, including N65587.