Apparatus

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sensors Mode-S transponder

A25C13

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N251JX · EMBRAER ERJ-135 · operated by BANK OF UTAH TRUSTEE

Hex
A25C13
Octal
50456023
Decimal
10,640,403
Country
US
Tail
N251JX
Type
E135
Transponder active on ground
Flights observed
282
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S A25C13.

Country allocation

The ICAO 24-bit address A25C13 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
JSX178 JSX Air 9 2026-06-02
JSX175 JSX Air 9 2026-05-01
JSX174 JSX Air 9 2026-05-01
JSX177 JSX Air 8 2026-06-03
JSX477 - 7 2026-06-26
JSX476 - 7 2026-06-26
JSX303 JSX Air 6 2026-07-19
JSX302 JSX Air 6 2026-07-19
JSX301 JSX Air 6 2026-07-21
JSX109 JSX Air 6 2026-07-24
JSX655 JSX Air 5 2026-07-18
JSX654 JSX Air 5 2026-07-18
JSX623 JSX Air 5 2026-07-25
JSX622 JSX Air 5 2026-07-25
JSX323 JSX Air 5 2026-07-26
JSX322 JSX Air 5 2026-07-26
JSX300 JSX Air 5 2026-07-21
JSX113 - 5 2026-07-03
JSX111 JSX Air 5 2026-07-25
JSX110 JSX Air 5 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JSX323 LAX → LAS Jul 26, 21:20 UTCJul 26, 22:05 UTC45m
2026-07-26 JSX322 LAS → LAX Jul 26, 19:50 UTCJul 26, 20:30 UTC40m
2026-07-25 JSX309 SNA → LAS Jul 25, 21:25 UTCJul 25, 22:10 UTC45m
2026-07-25 JSX308 LAS → SNA Jul 25, 19:50 UTCJul 25, 20:35 UTC45m
2026-07-25 JSX623 CLD → LAS Jul 25, 18:00 UTCJul 25, 18:50 UTC50m
2026-07-25 JSX622 LAS → CLD Jul 25, 16:10 UTCJul 25, 16:55 UTC45m
2026-07-25 JSX108 BUR → LAS Jul 25, 04:35 UTCJul 25, 05:10 UTC35m
2026-07-25 JSX111 LAS → BUR Jul 25, 02:35 UTCJul 25, 03:20 UTC45m
2026-07-25 JSX110 BUR → LAS Jul 25, 00:35 UTCJul 25, 01:25 UTC50m
2026-07-24 JSX109 LAS → BUR Jul 24, 22:30 UTCJul 24, 23:15 UTC45m
2026-07-24 JSX656 LAS → OAK Jul 24, 19:25 UTCJul 24, 20:45 UTC1h 20m
2026-07-24 JSX182 BUR → OAK Jul 24, 17:40 UTCJul 24, 18:35 UTC55m
2026-07-24 JSX101 LAS → BUR Jul 24, 14:40 UTCJul 24, 15:25 UTC45m
2026-07-24 JSX108 BUR → LAS Jul 24, 03:15 UTCJul 24, 04:00 UTC45m
2026-07-24 JSX111 LAS → BUR Jul 24, 01:35 UTCJul 24, 02:15 UTC40m
2026-07-23 JSX110 BUR → LAS Jul 23, 23:25 UTCJul 24, 00:05 UTC40m
2026-07-23 JSX109 LAS → BUR Jul 23, 22:45 UTCJul 23, 23:15 UTC30m
2026-07-23 JSX109 LAS → BUR Jul 23, 21:45 UTCJul 23, 22:35 UTC50m
2026-07-23 JSX317 LAS → SNA Jul 23, 19:20 UTCJul 23, 20:05 UTC45m
2026-07-23 JSX316 SNA → LAS Jul 23, 17:50 UTCJul 23, 18:30 UTC40m
2026-07-23 JSX102 BUR → LAS Jul 23, 16:05 UTCJul 23, 16:50 UTC45m
2026-07-23 JSX101 LAS → BUR Jul 23, 14:10 UTCJul 23, 15:00 UTC50m
2026-07-23 JSX323 LAX → LAS Jul 23, 01:30 UTCJul 23, 02:15 UTC45m
2026-07-22 JSX322 LAS → LAX Jul 22, 23:40 UTCJul 23, 00:25 UTC45m
2026-07-22 JSX317 LAS → SNA Jul 22, 19:30 UTCJul 22, 20:20 UTC50m
2026-07-22 JSX316 SNA → LAS Jul 22, 17:45 UTCJul 22, 18:25 UTC40m
2026-07-22 JSX307 - Jul 22, 03:10 UTCJul 22, 03:55 UTC45m
2026-07-22 JSX306 LAS → SNA Jul 22, 01:45 UTCJul 22, 02:30 UTC45m
2026-07-22 JSX110 BUR → LAS Jul 22, 00:10 UTCJul 22, 00:50 UTC40m
2026-07-21 JSX109 LAS → BUR Jul 21, 22:10 UTCJul 21, 23:00 UTC50m
2026-07-21 JSX413 SCF → LAS Jul 21, 20:15 UTCJul 21, 21:00 UTC45m
2026-07-21 JSX412 - Jul 21, 18:25 UTCJul 21, 19:10 UTC45m
2026-07-21 JSX301 SNA → LAS Jul 21, 16:40 UTCJul 21, 17:30 UTC50m
2026-07-21 JSX300 LAS → SNA Jul 21, 15:10 UTCJul 21, 15:50 UTC40m
2026-07-21 JSX317 LAS → SNA Jul 21, 00:00 UTCJul 21, 00:45 UTC45m
2026-07-20 JSX316 - Jul 20, 22:25 UTCJul 20, 23:10 UTC45m
2026-07-19 JSX305 SNA → LAS Jul 19, 23:55 UTCJul 20, 00:35 UTC40m
2026-07-19 JSX304 LAS → SNA Jul 19, 22:25 UTCJul 19, 23:05 UTC40m
2026-07-19 JSX303 SNA → LAS Jul 19, 20:05 UTCJul 19, 21:00 UTC55m
2026-07-19 JSX302 LAS → SNA Jul 19, 18:30 UTCJul 19, 19:15 UTC45m
2026-07-19 JSX301 SNA → LAS Jul 19, 16:35 UTCJul 19, 17:20 UTC45m
2026-07-19 JSX300 LAS → SNA Jul 19, 14:45 UTCJul 19, 15:25 UTC40m
2026-07-18 JSX414 SCF → LAS Jul 18, 23:55 UTCJul 19, 00:45 UTC50m
2026-07-18 JSX415 - Jul 18, 22:15 UTCJul 18, 23:15 UTC1h 0m
2026-07-18 JSX655 OAK → LAS Jul 18, 19:30 UTCJul 18, 20:35 UTC1h 5m
2026-07-18 JSX654 LAS → OAK Jul 18, 17:20 UTCJul 18, 18:30 UTC1h 10m
2026-07-18 JSX323 - Jul 18, 01:34 UTCJul 18, 02:14 UTC40m
2026-07-17 JSX322 LAS → LAX Jul 17, 23:39 UTCJul 18, 00:19 UTC40m
2026-07-17 JSX321 LAX → LAS Jul 17, 20:29 UTCJul 17, 21:34 UTC1h 5m
2026-07-17 JSX320 LAS → LAX Jul 17, 18:15 UTCJul 17, 18:55 UTC40m

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 N251JX page for operator, model, and routing details .

Mode-S A25C13 frequently asked

What is Mode-S code A25C13?
A25C13 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N251JX.
Where is Mode-S A25C13 registered?
Mode-S code A25C13 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 A25C13 broadcasting right now?
Mode-S A25C13 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A25C13, octal 50456023, decimal 10,640,403.
What flights does A25C13 operate?
Mode-S A25C13 has broadcast 20 distinct callsigns, including JSX178, JSX175, JSX174, JSX177, JSX477.