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sensors Mode-S transponder

A5A725

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4630N · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC

Hex
A5A725
Octal
51323445
Decimal
10,856,229
Country
US
Tail
N4630N
Type
C402
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
303
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A5A725.

Country allocation

The ICAO 24-bit address A5A725 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 20 distinct

Callsign Airline Flights Last seen
KAP394 - 23 2026-07-17
KAP27 Cape Air 18 2026-07-14
KAP763 Cape Air 17 2026-06-03
KAP155 Cape Air 14 2026-07-26
KAP1022 Cape Air 14 2026-05-17
KAP717 Cape Air 11 2026-04-27
KAP911 - 10 2026-06-11
KAP907 Cape Air 10 2026-07-25
KAP78 - 10 2026-06-27
KAP42 Cape Air 10 2026-05-05
KAP328 Cape Air 10 2026-07-24
KAP413 - 8 2026-06-28
KAP296 Cape Air 8 2026-06-14
KAP111 Cape Air 8 2026-07-23
KAP314 - 7 2026-07-07
KAP8380 Cape Air 6 2026-05-31
KAP527 Cape Air 6 2026-06-12
KAP154 Cape Air 6 2026-05-20
KAP82 Cape Air 5 2026-05-27
KAP70 Cape Air 5 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAP5281 ACK → BOS Jul 26, 20:55 UTCJul 26, 21:15 UTC20m
2026-07-26 KAP155 BOS → BHB Jul 26, 19:10 UTCJul 26, 19:25 UTC15m
2026-07-26 KAP155 BOS → BHB Jul 26, 17:35 UTCJul 26, 18:30 UTC55m
2026-07-26 KAP155 BOS → BHB Jul 26, 15:20 UTCJul 26, 16:10 UTC50m
2026-07-26 KAP155 BOS → BHB Jul 26, 14:25 UTCJul 26, 14:35 UTC10m
2026-07-25 KAP907 HYA → CMH Jul 25, 22:35 UTCJul 25, 23:40 UTC1h 5m
2026-07-25 KAP907 HYA → CMH Jul 25, 21:00 UTCJul 25, 21:35 UTC35m
2026-07-25 KAP907 HYA → CMH Jul 25, 19:50 UTCJul 25, 20:20 UTC30m
2026-07-25 KAP907 HYA → CMH Jul 25, 13:00 UTCJul 25, 13:30 UTC30m
2026-07-25 KAP907 HYA → CMH Jul 25, 12:05 UTCJul 25, 12:15 UTC10m
2026-07-24 KAP907 HYA → CMH Jul 24, 14:10 UTCJul 24, 14:45 UTC35m
2026-07-24 KAP907 - Jul 24, 12:50 UTCJul 24, 13:15 UTC25m
2026-07-24 KAP907 - Jul 24, 11:25 UTCJul 24, 11:40 UTC15m
2026-07-24 KAP328 BOS → BHB Jul 24, 01:25 UTCJul 24, 01:45 UTC20m
2026-07-24 KAP6109 ACK → BOS Jul 24, 00:00 UTCJul 24, 00:30 UTC30m
2026-07-23 KAP328 BOS → BHB Jul 23, 22:55 UTCJul 23, 23:20 UTC25m
2026-07-23 KAP5201 ACK → BOS Jul 23, 21:10 UTCJul 23, 21:40 UTC30m
2026-07-23 KAP328 BOS → BHB Jul 23, 18:55 UTCJul 23, 19:25 UTC30m
2026-07-23 KAP7001 - Jul 23, 17:40 UTCJul 23, 18:15 UTC35m
2026-07-23 KAP111 BOS → LEB Jul 23, 15:00 UTCJul 23, 15:25 UTC25m
2026-07-23 KAP111 BOS → LEB Jul 23, 13:05 UTCJul 23, 14:00 UTC55m
2026-07-22 KAP111 BOS → LEB Jul 22, 21:50 UTCJul 22, 22:50 UTC1h 0m
2026-07-22 KAP111 BOS → LEB Jul 22, 18:35 UTCJul 22, 19:15 UTC40m
2026-07-22 KAP111 BOS → LEB Jul 22, 17:00 UTCJul 22, 17:45 UTC45m
2026-07-22 KAP111 BOS → LEB Jul 22, 14:55 UTCJul 22, 15:30 UTC35m
2026-07-22 KAP111 BOS → LEB Jul 22, 13:15 UTCJul 22, 14:45 UTC1h 30m
2026-07-21 KAP111 BOS → LEB Jul 21, 19:55 UTCJul 21, 20:45 UTC50m
2026-07-19 KAP328 BOS → BHB Jul 19, 21:40 UTCJul 19, 22:10 UTC30m
2026-07-19 KAP328 BOS → BHB Jul 19, 20:35 UTCJul 19, 21:00 UTC25m
2026-07-19 KAP328 BOS → BHB Jul 19, 19:40 UTCJul 19, 19:50 UTC10m
2026-07-19 KAP328 BOS → BHB Jul 19, 17:10 UTCJul 19, 17:45 UTC35m
2026-07-19 KAP328 BOS → BHB Jul 19, 16:00 UTCJul 19, 16:35 UTC35m
2026-07-19 KAP328 BOS → BHB Jul 19, 14:50 UTCJul 19, 15:00 UTC10m
2026-07-17 KAPT616 - Jul 17, 18:15 UTCJul 17, 19:35 UTC1h 20m
2026-07-17 KAP394 - Jul 17, 01:29 UTCJul 17, 01:55 UTC25m
2026-07-16 KAP394 - Jul 16, 23:29 UTCJul 17, 00:10 UTC40m
2026-07-16 KAP394 - Jul 16, 22:10 UTCJul 16, 22:35 UTC25m
2026-07-16 KAP394 - Jul 16, 20:49 UTCJul 16, 21:10 UTC20m
2026-07-16 KAPT616 - Jul 16, 18:15 UTCJul 16, 19:20 UTC1h 5m
2026-07-16 KAP394 - Jul 16, 01:35 UTCJul 16, 02:20 UTC45m
2026-07-16 KAP394 - Jul 16, 00:15 UTCJul 16, 00:45 UTC30m
2026-07-15 KAP394 - Jul 15, 22:35 UTCJul 15, 23:00 UTC25m
2026-07-15 KAP394 - Jul 15, 20:55 UTCJul 15, 21:25 UTC30m
2026-07-15 KAP394 - Jul 15, 19:25 UTCJul 15, 19:45 UTC20m
2026-07-15 KAP394 - Jul 15, 18:15 UTCJul 15, 18:40 UTC25m
2026-07-14 KAP27 MVY → BOS Jul 14, 18:20 UTCJul 14, 18:30 UTC10m
2026-07-14 KAP27 MVY → BOS Jul 14, 15:40 UTCJul 14, 16:10 UTC30m
2026-07-14 KAP27 MVY → BOS Jul 14, 14:20 UTCJul 14, 15:00 UTC40m
2026-07-14 KAP27 MVY → BOS Jul 14, 12:40 UTCJul 14, 13:10 UTC30m
2026-07-14 KAP27 MVY → BOS Jul 14, 11:10 UTCJul 14, 11:45 UTC35m

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 N4630N page for operator, model, and routing details .

Mode-S A5A725 frequently asked

What is Mode-S code A5A725?
A5A725 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4630N.
Where is Mode-S A5A725 registered?
Mode-S code A5A725 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 A5A725 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5A725, octal 51323445, decimal 10,856,229.
What flights does A5A725 operate?
Mode-S A5A725 has broadcast 20 distinct callsigns, including KAP394, KAP27, KAP763, KAP155, KAP1022.