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
No current signal · last broadcast 14h ago
Flights observed
103
Distinct callsigns
20
Country
US
Last broadcast
14h 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
JSX175 JSX Air 9 2026-05-01
JSX174 JSX Air 9 2026-05-01
JSX178 JSX Air 8 2026-05-12
JSX177 JSX Air 7 2026-05-13
JSX173 JSX Air 4 2026-05-14
JSX170 JSX Air 4 2026-05-14
JSX142 JSX Air 4 2026-05-28
JSX141 JSX Air 4 2026-05-28
JSX9407 JSX Air 3 2026-05-05
JSX113 JSX Air 3 2026-05-07
JSX9400 JSX Air 2 2026-05-26
JSX8001 JSX Air 2 2026-04-17
JSX776 JSX Air 2 2026-04-20
JSX775 JSX Air 2 2026-04-20
JSX621 JSX Air 2 2026-04-15
JSX179 JSX Air 2 2026-05-12
JSX176 JSX Air 2 2026-05-12
N251JX - 1 2026-04-13
JSX9850 JSX Air 1 2026-05-17
JSX9001 - 1 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 JSX107 LAS → BUR May 29, 19:25 UTCMay 29, 20:10 UTC45m
2026-05-29 JSX106 BUR → LAS May 29, 17:45 UTCMay 29, 18:20 UTC35m
2026-05-29 JSX103 LAS → BUR May 29, 16:05 UTCMay 29, 16:50 UTC45m
2026-05-29 JSX100 BUR → LAS May 29, 14:35 UTCMay 29, 15:15 UTC40m
2026-05-28 JSX142 CCR → BUR May 28, 21:50 UTCMay 28, 22:45 UTC55m
2026-05-28 JSX141 BUR → CCR May 28, 20:15 UTCMay 28, 21:10 UTC55m
2026-05-26 JSX9400 SJC → BUR May 26, 20:15 UTCMay 26, 22:20 UTC2h 5m
2026-05-26 JSX9400 SJC → BUR May 26, 17:44 UTCMay 26, 19:40 UTC1h 55m
2026-05-17 JSX9850 OAK → OAK May 17, 13:05 UTCMay 17, 16:20 UTC3h 15m
2026-05-14 JSX173 OAK → BUR May 14, 16:15 UTCMay 14, 17:10 UTC55m
2026-05-14 JSX170 BUR → OAK May 14, 14:05 UTCMay 14, 14:55 UTC50m
2026-05-13 JSX177 OAK → BUR May 13, 01:35 UTCMay 13, 02:35 UTC1h 0m
2026-05-12 JSX176 BUR → OAK May 12, 23:45 UTCMay 13, 00:35 UTC50m
2026-05-12 JSX179 OAK → BUR May 12, 21:45 UTCMay 12, 22:45 UTC1h 0m
2026-05-12 JSX178 BUR → OAK May 12, 19:20 UTCMay 12, 20:10 UTC50m
2026-05-11 JSX755 SCF → DAL May 11, 21:55 UTCMay 11, 22:35 UTC39m
2026-05-11 JSX142 CCR → BUR May 11, 20:10 UTCMay 11, 21:05 UTC55m
2026-05-11 JSX141 BUR → CCR May 11, 18:10 UTCMay 11, 19:10 UTC1h 0m
2026-05-11 JSX185 OAK → BUR May 11, 00:34 UTCMay 11, 01:30 UTC55m
2026-05-10 JSX184 BUR → OAK May 10, 22:49 UTCMay 10, 23:44 UTC55m
2026-05-10 JSX183 OAK → BUR May 10, 20:30 UTCMay 10, 21:25 UTC55m
2026-05-10 JSX182 BUR → OAK May 10, 18:25 UTCMay 10, 19:15 UTC50m
2026-05-09 JSX109 LAS → BUR May 9, 23:35 UTCMay 10, 00:20 UTC45m
2026-05-09 JSX110 BUR → LAS May 9, 21:55 UTCMay 9, 22:45 UTC50m
2026-05-09 JSX115 LAS → BUR May 9, 20:10 UTCMay 9, 20:55 UTC45m
2026-05-09 JSX114 BUR → LAS May 9, 18:15 UTCMay 9, 19:00 UTC45m
2026-05-07 JSX113 LAS → BUR May 7, 02:00 UTCMay 7, 02:40 UTC40m
2026-05-07 JSX112 BUR → LAS May 7, 00:25 UTCMay 7, 01:10 UTC45m
2026-05-06 JSX111 LAS → BUR May 6, 22:55 UTCMay 6, 23:35 UTC40m
2026-05-06 JSX108 BUR → LAS May 6, 21:10 UTCMay 6, 21:50 UTC40m
2026-05-05 JSX9407 CCR → OAK May 5, 21:10 UTCMay 5, 22:01 UTC50m
2026-05-01 JSX178 BUR → OAK May 1, 23:35 UTCMay 2, 00:25 UTC50m
2026-05-01 JSX177 OAK → BUR May 1, 21:40 UTCMay 1, 22:35 UTC55m
2026-05-01 JSX174 BUR → OAK May 1, 19:35 UTCMay 1, 20:30 UTC55m
2026-05-01 JSX175 OAK → BUR May 1, 17:30 UTCMay 1, 18:20 UTC50m
2026-04-30 JSX178 BUR → OAK Apr 30, 23:25 UTCMay 1, 00:20 UTC55m
2026-04-30 JSX177 OAK → BUR Apr 30, 21:35 UTCApr 30, 22:25 UTC50m
2026-04-30 JSX174 BUR → OAK Apr 30, 19:20 UTCApr 30, 20:10 UTC50m
2026-04-30 JSX175 OAK → BUR Apr 30, 17:30 UTCApr 30, 18:25 UTC55m
2026-04-29 JSX174 BUR → OAK Apr 29, 20:20 UTCApr 29, 21:15 UTC55m
2026-04-29 JSX175 OAK → BUR Apr 29, 18:35 UTCApr 29, 19:25 UTC50m
2026-04-29 JSX170 BUR → OAK Apr 29, 16:20 UTCApr 29, 17:15 UTC55m
2026-04-29 JSX173 OAK → BUR Apr 29, 14:25 UTCApr 29, 15:20 UTC55m
2026-04-28 JSX174 BUR → OAK Apr 28, 20:20 UTCApr 28, 21:10 UTC50m
2026-04-28 JSX175 OAK → BUR Apr 28, 18:35 UTCApr 28, 19:30 UTC55m
2026-04-28 JSX170 BUR → OAK Apr 28, 16:15 UTCApr 28, 17:10 UTC55m
2026-04-28 JSX173 OAK → BUR Apr 28, 14:25 UTCApr 28, 15:20 UTC55m
2026-04-27 JSX178 BUR → OAK Apr 27, 23:20 UTCApr 28, 00:15 UTC55m
2026-04-27 JSX177 OAK → BUR Apr 27, 21:35 UTCApr 27, 22:30 UTC55m
2026-04-27 JSX174 BUR → OAK Apr 27, 19:20 UTCApr 27, 20:15 UTC55m

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 14h 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 JSX175, JSX174, JSX178, JSX177, JSX173.