Apparatus

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sensors Mode-S transponder

A2725D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N257JX · EMBRAER ERJ-135 · operated by DELUX PUBLIC CHARTER LLC

Hex
A2725D
Octal
50471135
Decimal
10,646,109
Country
US
Tail
N257JX
Type
E135
Transponder active on ground
Flights observed
189
Distinct callsigns
20
Country
US
Last broadcast
53m ago

Last known position

Most recent position reported by Mode-S A2725D.

Country allocation

The ICAO 24-bit address A2725D 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
JSX655 JSX Air 7 2026-05-28
JSX654 JSX Air 7 2026-05-28
JSX651 JSX Air 6 2026-05-28
JSX650 JSX Air 6 2026-05-28
JSX303 JSX Air 6 2026-05-21
JSX302 JSX Air 6 2026-05-21
JSX311 JSX Air 5 2026-05-18
JSX310 JSX Air 5 2026-05-18
JSX111 JSX Air 5 2026-05-11
JSX110 JSX Air 5 2026-05-29
JSX109 JSX Air 5 2026-05-29
JSX108 JSX Air 5 2026-05-11
JSX622 JSX Air 4 2026-04-25
JSX321 JSX Air 4 2026-05-25
JSX320 JSX Air 4 2026-05-25
JSX132 JSX Air 4 2026-05-22
JSX113 JSX Air 4 2026-05-15
JSX625 JSX Air 3 2026-05-27
JSX624 JSX Air 3 2026-05-27
JSX623 JSX Air 3 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 JSX110 BUR → LAS May 29, 23:05 UTCMay 29, 23:15 UTC10m
2026-05-29 JSX109 LAS → BUR May 29, 21:30 UTCMay 29, 22:20 UTC50m
2026-05-29 JSX317 LAS → SNA May 29, 19:35 UTCMay 29, 20:15 UTC40m
2026-05-29 JSX316 SNA → LAS May 29, 17:45 UTCMay 29, 18:25 UTC40m
2026-05-29 JSX102 BUR → LAS May 29, 16:00 UTCMay 29, 16:45 UTC45m
2026-05-29 JSX101 LAS → BUR May 29, 14:30 UTCMay 29, 15:15 UTC45m
2026-05-29 JSXMX1 LAS → LAS May 29, 06:30 UTCMay 29, 06:40 UTC10m
2026-05-28 JSX651 OAK → LAS May 28, 23:50 UTCMay 29, 01:00 UTC1h 10m
2026-05-28 JSX650 LAS → OAK May 28, 21:55 UTCMay 28, 22:55 UTC1h 0m
2026-05-28 JSX655 OAK → LAS May 28, 19:00 UTCMay 28, 20:10 UTC1h 10m
2026-05-28 JSX654 LAS → OAK May 28, 16:45 UTCMay 28, 18:00 UTC1h 15m
2026-05-28 JSX323 LAX → LAS May 28, 00:50 UTCMay 28, 01:35 UTC45m
2026-05-27 JSX322 LAS → LAX May 27, 23:15 UTCMay 28, 00:00 UTC45m
2026-05-27 JSX625 CLD → LAS May 27, 21:30 UTCMay 27, 22:20 UTC50m
2026-05-27 JSX624 LAS → CLD May 27, 19:55 UTCMay 27, 20:35 UTC40m
2026-05-26 JSX651 OAK → LAS May 26, 00:39 UTCMay 26, 01:55 UTC1h 15m
2026-05-25 JSX650 LAS → OAK May 25, 22:49 UTCMay 25, 23:54 UTC1h 5m
2026-05-25 JSX321 LAX → LAS May 25, 20:09 UTCMay 25, 20:55 UTC45m
2026-05-25 JSX320 LAS → LAX May 25, 18:15 UTCMay 25, 19:00 UTC45m
2026-05-23 JSX307 SNA → LAS May 23, 03:25 UTCMay 23, 04:10 UTC45m
2026-05-23 JSX306 LAS → SNA May 23, 02:00 UTCMay 23, 02:45 UTC45m
2026-05-22 JSX124 BUR → LAS May 22, 23:50 UTCMay 23, 00:35 UTC45m
2026-05-22 JSX125 LAS → BUR May 22, 22:20 UTCMay 22, 23:05 UTC45m
2026-05-22 JSX321 LAX → LAS May 22, 20:20 UTCMay 22, 21:05 UTC45m
2026-05-22 JSX320 LAS → LAX May 22, 18:30 UTCMay 22, 19:10 UTC40m
2026-05-22 JSX301 SNA → LAS May 22, 16:25 UTCMay 22, 17:10 UTC45m
2026-05-22 JSX300 LAS → SNA May 22, 14:50 UTCMay 22, 15:30 UTC40m
2026-05-22 JSX132 BUR → LAS May 22, 03:35 UTCMay 22, 04:20 UTC45m
2026-05-22 JSX133 LAS → BUR May 22, 01:55 UTCMay 22, 02:35 UTC40m
2026-05-22 JSX305 SNA → LAS May 22, 00:00 UTCMay 22, 00:55 UTC55m
2026-05-21 JSX304 LAS → SNA May 21, 22:35 UTCMay 21, 23:15 UTC40m
2026-05-21 JSX303 SNA → LAS May 21, 20:05 UTCMay 21, 20:55 UTC50m
2026-05-21 JSX302 LAS → SNA May 21, 18:35 UTCMay 21, 19:20 UTC45m
2026-05-21 JSX301 SNA → LAS May 21, 16:15 UTCMay 21, 17:05 UTC50m
2026-05-21 JSX300 LAS → SNA May 21, 14:45 UTCMay 21, 15:20 UTC35m
2026-05-21 JSX323 LAX → LAS May 21, 01:20 UTCMay 21, 02:00 UTC40m
2026-05-20 JSX322 LAS → LAX May 20, 23:35 UTCMay 21, 00:20 UTC45m
2026-05-20 JSX303 SNA → LAS May 20, 21:20 UTCMay 20, 22:10 UTC50m
2026-05-20 JSX302 LAS → SNA May 20, 19:40 UTCMay 20, 20:20 UTC40m
2026-05-19 JSX651 OAK → LAS May 19, 01:15 UTCMay 19, 02:30 UTC1h 15m
2026-05-18 JSX650 LAS → OAK May 18, 22:55 UTCMay 19, 00:05 UTC1h 10m
2026-05-18 JSX321 LAX → LAS May 18, 20:10 UTCMay 18, 20:55 UTC45m
2026-05-18 JSX320 LAS → LAX May 18, 18:15 UTCMay 18, 19:05 UTC49m
2026-05-18 JSX8172 APA → LAS May 18, 14:45 UTCMay 18, 16:15 UTC1h 30m
2026-05-18 JSX9172 LAS → APA May 18, 12:30 UTCMay 18, 13:50 UTC1h 20m
2026-05-18 JSX311 SNA → LAS May 18, 01:50 UTCMay 18, 02:45 UTC55m
2026-05-18 JSX310 LAS → SNA May 18, 00:35 UTCMay 18, 01:15 UTC40m
2026-05-17 JSX371 SLC → LAS May 17, 21:55 UTCMay 17, 23:00 UTC1h 5m
2026-05-17 JSX370 LAS → SLC May 17, 20:10 UTCMay 17, 21:05 UTC55m
2026-05-16 JSX5183 LAX → LAS May 16, 23:25 UTCMay 17, 00:20 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 N257JX page for operator, model, and routing details .

Mode-S A2725D frequently asked

What is Mode-S code A2725D?
A2725D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N257JX.
Where is Mode-S A2725D registered?
Mode-S code A2725D 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 A2725D broadcasting right now?
Mode-S A2725D 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 A2725D, octal 50471135, decimal 10,646,109.
What flights does A2725D operate?
Mode-S A2725D has broadcast 20 distinct callsigns, including JSX655, JSX654, JSX651, JSX650, JSX303.