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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
No current signal · last broadcast 11h ago
Flights observed
220
Distinct callsigns
20
Country
US
Last broadcast
11h ago

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
JSX113 - 5 2026-07-03
JSX623 - 4 2026-06-26
JSX622 - 4 2026-06-26
JSX303 - 4 2026-07-12
JSX302 - 4 2026-07-12
JSX173 JSX Air 4 2026-05-14
JSX170 JSX Air 4 2026-05-14
JSX151 - 4 2026-07-13
JSX150 - 4 2026-07-13
JSX142 JSX Air 4 2026-05-28
JSX141 JSX Air 4 2026-05-28
JSX9407 JSX Air 3 2026-05-05
JSX751 - 3 2026-06-18
JSX750 - 3 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JSX108 - Jul 14, 01:35 UTCJul 14, 02:15 UTC40m
2026-07-13 JSX111 LAS → BUR Jul 13, 23:55 UTCJul 14, 00:40 UTC45m
2026-07-13 JSX151 - Jul 13, 21:45 UTCJul 13, 22:50 UTC1h 5m
2026-07-13 JSX150 LAS → CCR Jul 13, 19:50 UTCJul 13, 20:55 UTC1h 5m
2026-07-13 JSX133 BUR → LAS Jul 13, 04:25 UTCJul 13, 05:10 UTC45m
2026-07-13 JSX132 - Jul 13, 02:50 UTCJul 13, 03:30 UTC40m
2026-07-13 JSX305 - Jul 13, 00:30 UTCJul 13, 01:15 UTC45m
2026-07-12 JSX304 - Jul 12, 23:05 UTCJul 12, 23:45 UTC40m
2026-07-12 JSX303 - Jul 12, 20:20 UTCJul 12, 21:15 UTC55m
2026-07-12 JSX302 LAS → SNA Jul 12, 18:35 UTCJul 12, 19:25 UTC50m
2026-07-12 JSX301 - Jul 12, 16:35 UTCJul 12, 17:20 UTC45m
2026-07-12 JSX300 - Jul 12, 14:40 UTCJul 12, 15:25 UTC45m
2026-07-12 JSX305 - Jul 12, 00:50 UTCJul 12, 01:30 UTC40m
2026-07-11 JSX304 - Jul 11, 23:15 UTCJul 12, 00:01 UTC45m
2026-07-11 JSX323 - Jul 11, 20:45 UTCJul 11, 21:30 UTC45m
2026-07-11 JSX322 - Jul 11, 18:45 UTCJul 11, 19:30 UTC45m
2026-07-10 JSX651 OAK → LAS Jul 10, 21:10 UTCJul 10, 22:15 UTC1h 5m
2026-07-10 JSX650 LAS → OAK Jul 10, 19:10 UTCJul 10, 20:20 UTC1h 10m
2026-07-10 JSX655 OAK → LAS Jul 10, 16:50 UTCJul 10, 17:55 UTC1h 5m
2026-07-10 JSX654 - Jul 10, 14:35 UTCJul 10, 15:45 UTC1h 10m
2026-07-10 JSX311 - Jul 10, 01:40 UTCJul 10, 02:25 UTC45m
2026-07-10 JSX310 - Jul 10, 00:10 UTCJul 10, 00:50 UTC40m
2026-07-09 JSX151 - Jul 9, 21:40 UTCJul 9, 22:40 UTC1h 0m
2026-07-09 JSX150 LAS → CCR Jul 9, 19:40 UTCJul 9, 20:50 UTC1h 10m
2026-07-08 JSX625 - Jul 8, 21:35 UTCJul 8, 22:25 UTC50m
2026-07-08 JSX624 LAS → CLD Jul 8, 19:45 UTCJul 8, 20:25 UTC40m
2026-07-08 JSX655 OAK → LAS Jul 8, 17:25 UTCJul 8, 18:30 UTC1h 5m
2026-07-08 JSX654 LAS → OAK Jul 8, 15:25 UTCJul 8, 16:35 UTC1h 10m
2026-07-08 JSX323 - Jul 8, 01:30 UTCJul 8, 02:10 UTC40m
2026-07-07 JSX322 LAS → LAX Jul 7, 23:45 UTCJul 8, 00:30 UTC45m
2026-07-07 JSX317 - Jul 7, 19:25 UTCJul 7, 20:10 UTC45m
2026-07-07 JSX316 - Jul 7, 17:35 UTCJul 7, 18:15 UTC40m
2026-07-07 JSX151 CCR → LAS Jul 7, 01:15 UTCJul 7, 02:25 UTC1h 10m
2026-07-06 JSX150 - Jul 6, 23:20 UTCJul 7, 00:25 UTC1h 5m
2026-07-06 JSX627 - Jul 6, 21:20 UTCJul 6, 22:10 UTC50m
2026-07-06 JSX626 LAS → CLD Jul 6, 19:55 UTCJul 6, 20:35 UTC40m
2026-07-06 JSX151 CCR → LAS Jul 6, 01:25 UTCJul 6, 02:30 UTC1h 5m
2026-07-05 JSX150 - Jul 5, 23:25 UTCJul 6, 00:30 UTC1h 5m
2026-07-05 JSX319 - Jul 5, 21:35 UTCJul 5, 22:20 UTC45m
2026-07-05 JSX318 LAS → SNA Jul 5, 19:45 UTCJul 5, 20:25 UTC40m
2026-07-03 JSX656 OAK → LAS Jul 3, 19:15 UTCJul 3, 20:25 UTC1h 10m
2026-07-03 JSX182 BUR → OAK Jul 3, 17:35 UTCJul 3, 18:30 UTC55m
2026-07-03 JSX113 - Jul 3, 02:35 UTCJul 3, 03:15 UTC40m
2026-07-03 JSX112 BUR → LAS Jul 3, 00:30 UTCJul 3, 01:15 UTC45m
2026-07-02 JSX121 LAS → BUR Jul 2, 22:40 UTCJul 2, 23:25 UTC45m
2026-07-02 JSX303 - Jul 2, 20:15 UTCJul 2, 21:00 UTC45m
2026-07-02 JSX302 - Jul 2, 18:35 UTCJul 2, 19:20 UTC45m
2026-07-02 JSX301 - Jul 2, 16:30 UTCJul 2, 17:15 UTC45m
2026-06-29 JSX752 - Jun 29, 23:09 UTCJun 30, 00:09 UTC1h 0m
2026-06-29 JSX753 - Jun 29, 21:30 UTCJun 29, 22:19 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 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?
No active broadcast right now. Last signal was 11h ago.
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.