Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A3EA15

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N351SA · BEECH 200 Super King Air · operated by GUARDIAN FLIGHT LLC

Hex
A3EA15
Octal
50765025
Decimal
10,742,293
Country
US
Tail
N351SA
Type
BE20
No current signal · last broadcast 14h ago
Flights observed
151
Distinct callsigns
1
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S A3EA15.

Country allocation

The ICAO 24-bit address A3EA15 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
N351SA - 151 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 N351SA ANC → ENA Jul 21, 19:15 UTCJul 21, 19:30 UTC15m
2026-07-21 N351SA - Jul 21, 17:30 UTCJul 21, 17:50 UTC20m
2026-07-20 N351SA ANC → ENA Jul 20, 21:50 UTCJul 20, 22:10 UTC20m
2026-07-20 N351SA - Jul 20, 18:55 UTCJul 20, 20:00 UTC1h 5m
2026-07-20 N351SA ENA → AKN Jul 20, 17:35 UTCJul 20, 18:30 UTC55m
2026-07-20 N351SA - Jul 20, 04:05 UTCJul 20, 04:30 UTC25m
2026-07-19 N351SA - Jul 19, 23:00 UTCJul 19, 23:35 UTC35m
2026-07-19 N351SA - Jul 19, 21:25 UTCJul 19, 21:55 UTC30m
2026-07-19 N351SA - Jul 19, 00:50 UTCJul 19, 01:10 UTC20m
2026-07-18 N351SA - Jul 18, 21:40 UTCJul 18, 22:40 UTC1h 0m
2026-07-18 N351SA ENA → AKN Jul 18, 19:35 UTCJul 18, 20:35 UTC1h 0m
2026-07-18 N351SA ANC → ENA Jul 18, 02:35 UTCJul 18, 02:50 UTC16m
2026-07-17 N351SA - Jul 17, 23:50 UTCJul 18, 00:50 UTC1h 0m
2026-07-17 N351SA ENA → AKN Jul 17, 22:15 UTCJul 17, 23:14 UTC1h 0m
2026-07-17 N351SA - Jul 17, 21:00 UTCJul 17, 21:30 UTC30m
2026-07-17 N351SA - Jul 17, 16:24 UTCJul 17, 17:05 UTC40m
2026-06-21 N351SA - Jun 21, 22:29 UTCJun 22, 00:24 UTC1h 55m
2026-06-21 N351SA - Jun 21, 08:20 UTCJun 21, 08:49 UTC30m
2026-06-21 N351SA - Jun 21, 06:44 UTCJun 21, 07:09 UTC25m
2026-06-19 N351SA - Jun 19, 13:04 UTCJun 19, 13:50 UTC45m
2026-06-19 N351SA - Jun 19, 11:49 UTCJun 19, 12:14 UTC25m
2026-06-19 N351SA - Jun 19, 09:59 UTCJun 19, 11:09 UTC1h 10m
2026-06-19 N351SA - Jun 19, 07:45 UTCJun 19, 08:34 UTC50m
2026-06-19 N351SA - Jun 19, 06:39 UTCJun 19, 07:14 UTC35m
2026-06-19 N351SA - Jun 19, 03:55 UTCJun 19, 04:44 UTC50m
2026-06-18 N351SA - Jun 18, 00:55 UTCJun 18, 01:20 UTC25m
2026-06-17 N351SA - Jun 17, 22:30 UTCJun 18, 00:00 UTC1h 30m
2026-06-17 N351SA - Jun 17, 05:10 UTCJun 17, 06:40 UTC1h 30m
2026-06-17 N351SA - Jun 17, 02:40 UTCJun 17, 04:30 UTC1h 50m
2026-06-16 N351SA - Jun 16, 12:45 UTCJun 16, 13:40 UTC55m
2026-06-16 N351SA - Jun 16, 11:20 UTCJun 16, 11:49 UTC30m
2026-06-16 N351SA - Jun 16, 09:50 UTCJun 16, 10:04 UTC15m
2026-06-16 N351SA - Jun 16, 04:55 UTCJun 16, 05:50 UTC55m
2026-06-14 N351SA - Jun 14, 05:55 UTCJun 14, 06:15 UTC20m
2026-06-14 N351SA - Jun 14, 04:40 UTCJun 14, 04:55 UTC15m
2026-06-13 N351SA - Jun 13, 01:35 UTCJun 13, 01:50 UTC15m
2026-06-13 N351SA - Jun 13, 00:35 UTCJun 13, 00:45 UTC10m
2026-06-12 N351SA - Jun 12, 20:45 UTCJun 12, 21:00 UTC15m
2026-06-12 N351SA - Jun 12, 19:10 UTCJun 12, 19:20 UTC10m
2026-06-12 N351SA - Jun 12, 07:30 UTCJun 12, 07:50 UTC20m
2026-06-12 N351SA - Jun 12, 05:30 UTCJun 12, 06:40 UTC1h 10m
2026-06-12 N351SA - Jun 12, 04:00 UTCJun 12, 04:20 UTC20m
2026-06-11 N351SA - Jun 11, 23:50 UTCJun 12, 00:35 UTC46m
2026-06-11 N351SA - Jun 11, 22:10 UTCJun 11, 23:00 UTC50m
2026-06-11 N351SA - Jun 11, 06:30 UTCJun 11, 08:00 UTC1h 30m
2026-06-11 N351SA - Jun 11, 04:05 UTCJun 11, 04:25 UTC20m
2026-06-11 N351SA - Jun 11, 01:55 UTCJun 11, 02:20 UTC25m
2026-06-11 N351SA - Jun 11, 00:15 UTCJun 11, 00:55 UTC40m
2026-06-10 N351SA - Jun 10, 21:05 UTCJun 10, 22:55 UTC1h 50m
2026-06-10 N351SA ENA → ANC Jun 10, 18:25 UTCJun 10, 18:45 UTC20m

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 N351SA page for operator, model, and routing details .

Mode-S A3EA15 frequently asked

What is Mode-S code A3EA15?
A3EA15 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N351SA.
Where is Mode-S A3EA15 registered?
Mode-S code A3EA15 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 A3EA15 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3EA15, octal 50765025, decimal 10,742,293.
What flights does A3EA15 operate?
Mode-S A3EA15 has broadcast 1 distinct callsign, including N351SA.