sensors Mode-S transponder

A17BFE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N195NV · operated by ALLEGIANT AIR LLC

Hex
A17BFE
Octal
50275776
Decimal
10,583,038
Country
US
Tail
N195NV
Type
A320
No current signal · last broadcast 23h ago
Flights observed
8
Distinct callsigns
6
Country
US
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S A17BFE.

Country allocation

The ICAO 24-bit address A17BFE 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 6 distinct

Callsign Airline Flights Last seen
AAY251 - 2 2026-04-13
AAY227 - 2 2026-04-13
AAY270 - 1 2026-04-13
AAY225 Allegiant Air 1 2026-04-12
AAY1869 - 1 2026-04-13
AAY1857 - 1 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-13 AAY1857 - Apr 13, 23:35 UTCApr 13, 23:45 UTC10m
2026-04-13 AAY1869 - Apr 13, 21:05 UTCApr 13, 22:15 UTC1h 10m
2026-04-13 AAY227 - Apr 13, 19:45 UTCApr 13, 19:55 UTC10m
2026-04-13 AAY227 - Apr 13, 17:30 UTCApr 13, 19:55 UTC2h 25m
2026-04-13 AAY251 - Apr 13, 15:50 UTCApr 13, 16:00 UTC10m
2026-04-13 AAY251 - Apr 13, 12:45 UTCApr 13, 16:00 UTC3h 15m
2026-04-13 AAY270 - Apr 13, 00:40 UTCApr 13, 02:00 UTC1h 20m
2026-04-12 AAY225 PGD → AVL Apr 12, 18:40 UTCApr 12, 20:15 UTC1h 35m

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 N195NV page for operator, model, and routing details .

Mode-S A17BFE frequently asked

What is Mode-S code A17BFE?
A17BFE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N195NV.
Where is Mode-S A17BFE registered?
Mode-S code A17BFE 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 A17BFE broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A17BFE, octal 50275776, decimal 10,583,038.
What flights does A17BFE operate?
Mode-S A17BFE has broadcast 6 distinct callsigns, including AAY251, AAY227, AAY270, AAY225, AAY1869.