Apparatus

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sensors Mode-S transponder

A25E53

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2515Y · PIPER PA-28-140/150/160/180 · operated by NATIONWIDE AVIATION LLC

Hex
A25E53
Octal
50457123
Decimal
10,640,979
Country
US
Tail
N2515Y
Type
P28A
No current signal · last broadcast Jul 22, 18:55 UTC
Flights observed
115
Distinct callsigns
1
Country
US
Last broadcast
Jul 22, 18:55 UTC

Last known position

Most recent position reported by Mode-S A25E53.

Country allocation

The ICAO 24-bit address A25E53 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
NWX251 - 115 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 NWX251 - Jul 22, 17:00 UTCJul 22, 18:55 UTC1h 55m
2026-07-22 NWX251 - Jul 22, 14:45 UTCJul 22, 15:40 UTC55m
2026-07-09 NWX251 - Jul 9, 22:40 UTCJul 9, 22:55 UTC15m
2026-07-09 NWX251 - Jul 9, 13:50 UTCJul 9, 14:55 UTC1h 5m
2026-07-09 NWX251 - Jul 9, 11:25 UTCJul 9, 13:05 UTC1h 40m
2026-07-08 NWX251 - Jul 8, 12:55 UTCJul 8, 14:15 UTC1h 20m
2026-07-07 NWX251 - Jul 7, 17:20 UTCJul 7, 17:45 UTC25m
2026-07-07 NWX251 - Jul 7, 14:50 UTCJul 7, 16:25 UTC1h 35m
2026-07-07 NWX251 - Jul 7, 12:50 UTCJul 7, 14:15 UTC1h 25m
2026-07-06 NWX251 - Jul 6, 23:55 UTCJul 7, 00:35 UTC40m
2026-07-06 NWX251 - Jul 6, 22:30 UTCJul 6, 23:15 UTC45m
2026-07-06 NWX251 - Jul 6, 20:45 UTCJul 6, 21:50 UTC1h 5m
2026-07-06 NWX251 - Jul 6, 17:50 UTCJul 6, 19:55 UTC2h 5m
2026-07-06 NWX251 - Jul 6, 12:30 UTCJul 6, 17:10 UTC4h 40m
2026-07-04 NWX251 - Jul 4, 15:30 UTCJul 4, 17:05 UTC1h 35m
2026-07-03 NWX251 - Jul 3, 15:20 UTCJul 3, 17:30 UTC2h 10m
2026-07-03 NWX251 - Jul 3, 12:55 UTCJul 3, 14:10 UTC1h 15m
2026-07-02 NWX251 - Jul 2, 16:40 UTCJul 2, 17:45 UTC1h 5m
2026-07-02 NWX251 - Jul 2, 15:00 UTCJul 2, 16:00 UTC1h 0m
2026-07-01 NWX251 - Jul 1, 22:20 UTCJul 1, 23:40 UTC1h 20m
2026-07-01 NWX251 - Jul 1, 14:05 UTCJul 1, 15:45 UTC1h 40m
2026-07-01 NWX251 - Jul 1, 12:40 UTCJul 1, 13:20 UTC40m
2026-06-30 NWX251 - Jun 30, 22:30 UTCJun 30, 23:10 UTC40m
2026-06-30 NWX251 - Jun 30, 20:00 UTCJun 30, 21:05 UTC1h 5m
2026-06-25 NWX251 - Jun 25, 12:44 UTCJun 25, 14:09 UTC1h 25m
2026-06-24 NWX251 - Jun 24, 23:50 UTCJun 25, 00:09 UTC20m
2026-06-24 NWX251 - Jun 24, 23:00 UTCJun 24, 23:20 UTC20m
2026-06-24 NWX251 - Jun 24, 17:50 UTCJun 24, 19:10 UTC1h 20m
2026-06-24 NWX251 - Jun 24, 15:14 UTCJun 24, 16:05 UTC50m
2026-06-23 NWX251 - Jun 23, 17:50 UTCJun 23, 18:45 UTC55m
2026-06-23 NWX251 - Jun 23, 15:04 UTCJun 23, 16:39 UTC1h 35m
2026-06-23 NWX251 - Jun 23, 12:25 UTCJun 23, 13:39 UTC1h 15m
2026-06-23 NWX251 - Jun 23, 00:00 UTCJun 23, 00:35 UTC35m
2026-06-22 NWX251 - Jun 22, 20:49 UTCJun 22, 21:45 UTC55m
2026-06-21 NWX251 - Jun 21, 15:34 UTCJun 21, 16:44 UTC1h 10m
2026-06-21 NWX251 - Jun 21, 14:44 UTCJun 21, 14:59 UTC15m
2026-06-21 NWX251 - Jun 21, 14:05 UTCJun 21, 14:40 UTC35m
2026-06-18 NWX251 - Jun 18, 13:45 UTCJun 18, 15:30 UTC1h 45m
2026-06-17 NWX251 - Jun 17, 13:05 UTCJun 17, 13:30 UTC25m
2026-06-16 NWX251 - Jun 16, 16:05 UTCJun 16, 16:50 UTC45m
2026-06-16 NWX251 - Jun 16, 15:00 UTCJun 16, 15:30 UTC30m
2026-06-15 NWX251 - Jun 15, 20:30 UTCJun 15, 21:30 UTC1h 0m
2026-06-13 NWX251 - Jun 13, 14:15 UTCJun 13, 14:50 UTC35m
2026-06-13 NWX251 - Jun 13, 13:00 UTCJun 13, 13:45 UTC45m
2026-06-10 NWX251 - Jun 10, 15:05 UTCJun 10, 15:30 UTC25m
2026-06-10 NWX251 - Jun 10, 01:00 UTCJun 10, 01:20 UTC20m
2026-06-09 NWX251 - Jun 9, 19:30 UTCJun 9, 23:35 UTC4h 5m
2026-06-09 NWX251 - Jun 9, 14:30 UTCJun 9, 15:50 UTC1h 20m
2026-06-08 NWX251 - Jun 8, 19:05 UTCJun 8, 20:15 UTC1h 10m
2026-06-03 NWX251 - Jun 3, 16:30 UTCJun 3, 17:45 UTC1h 15m

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 N2515Y page for operator, model, and routing details .

Mode-S A25E53 frequently asked

What is Mode-S code A25E53?
A25E53 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2515Y.
Where is Mode-S A25E53 registered?
Mode-S code A25E53 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 A25E53 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 18:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A25E53, octal 50457123, decimal 10,640,979.
What flights does A25E53 operate?
Mode-S A25E53 has broadcast 1 distinct callsign, including NWX251.