sensors Mode-S transponder

A623B3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N495LP · operated by INTERNATIONAL AIR SERVICES INC TRUSTEE

Hex
A623B3
Octal
51421663
Decimal
10,888,115
Country
US
Tail
N495LP
Type
PIAT
No current signal · last broadcast 16h ago
Flights observed
6
Distinct callsigns
1
Country
US
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S A623B3.

Country allocation

The ICAO 24-bit address A623B3 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
N495LP - 6 2026-04-14

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 N495LP - Apr 14, 10:05 UTCApr 14, 10:20 UTC15m
2026-04-14 N495LP - Apr 14, 07:10 UTCApr 14, 09:05 UTC1h 55m
2026-04-14 N495LP - Apr 14, 06:50 UTCApr 14, 07:10 UTC20m
2026-04-14 N495LP - Apr 14, 05:15 UTCApr 14, 06:00 UTC45m
2026-04-13 N495LP - Apr 13, 08:55 UTCApr 13, 11:20 UTC2h 25m
2026-04-12 N495LP - Apr 12, 19:00 UTCApr 12, 19:50 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 N495LP page for operator, model, and routing details .

Mode-S A623B3 frequently asked

What is Mode-S code A623B3?
A623B3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N495LP.
Where is Mode-S A623B3 registered?
Mode-S code A623B3 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 A623B3 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A623B3, octal 51421663, decimal 10,888,115.
What flights does A623B3 operate?
Mode-S A623B3 has broadcast 1 distinct callsign, including N495LP.