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sensors Mode-S transponder

A4B985

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N403TX · operated by NLW INC

Hex
A4B985
Octal
51134605
Decimal
10,795,397
Country
US
Tail
N403TX
Type
SF50
No current signal · last broadcast 2d ago
Flights observed
114
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A4B985.

Country allocation

The ICAO 24-bit address A4B985 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
JLG403 - 114 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 JLG403 - Jul 22, 20:20 UTCJul 22, 20:50 UTC30m
2026-07-22 JLG403 - Jul 22, 18:45 UTCJul 22, 19:50 UTC1h 5m
2026-07-22 JLG403 - Jul 22, 11:40 UTCJul 22, 12:45 UTC1h 5m
2026-07-21 JLG403 - Jul 21, 10:00 UTCJul 21, 11:15 UTC1h 15m
2026-07-21 JLG403 - Jul 21, 08:15 UTCJul 21, 09:10 UTC55m
2026-07-20 JLG403 - Jul 20, 07:15 UTCJul 20, 08:15 UTC1h 0m
2026-07-20 JLG403 - Jul 20, 05:05 UTCJul 20, 06:05 UTC1h 0m
2026-07-19 JLG403 DAY → IND Jul 19, 18:15 UTCJul 19, 18:50 UTC35m
2026-07-19 JLG403 - Jul 19, 16:50 UTCJul 19, 17:20 UTC30m
2026-07-18 JLG403 - Jul 18, 02:40 UTCJul 18, 03:45 UTC1h 6m
2026-07-18 JLG403 - Jul 18, 00:25 UTCJul 18, 01:45 UTC1h 20m
2026-07-17 JLG403 - Jul 17, 20:15 UTCJul 17, 22:05 UTC1h 50m
2026-07-17 JLG403 - Jul 17, 17:55 UTCJul 17, 19:35 UTC1h 40m
2026-07-14 JLG403 RST → IND Jul 14, 13:25 UTCJul 14, 15:00 UTC1h 35m
2026-07-14 JLG403 - Jul 14, 11:20 UTCJul 14, 12:45 UTC1h 25m
2026-07-13 JLG403 - Jul 13, 23:20 UTCJul 14, 01:00 UTC1h 40m
2026-07-13 JLG403 - Jul 13, 20:55 UTCJul 13, 22:40 UTC1h 45m
2026-07-12 JLG403 - Jul 12, 21:55 UTCJul 12, 22:20 UTC25m
2026-07-12 JLG403 - Jul 12, 16:05 UTCJul 12, 16:30 UTC25m
2026-07-12 JLG403 - Jul 12, 06:50 UTCJul 12, 07:15 UTC25m
2026-07-12 JLG403 - Jul 12, 02:55 UTCJul 12, 03:20 UTC25m
2026-07-11 JLG403 MDW → IND Jul 11, 18:40 UTCJul 11, 19:15 UTC35m
2026-07-11 JLG403 - Jul 11, 16:35 UTCJul 11, 17:20 UTC45m
2026-07-11 JLG403 LUK → IND Jul 11, 02:35 UTCJul 11, 03:10 UTC35m
2026-07-11 JLG403 - Jul 11, 01:35 UTCJul 11, 02:05 UTC30m
2026-07-10 JLG403 - Jul 10, 18:20 UTCJul 10, 18:40 UTC20m
2026-07-10 JLG403 - Jul 10, 10:05 UTCJul 10, 11:10 UTC1h 5m
2026-07-10 JLG403 - Jul 10, 04:10 UTCJul 10, 05:45 UTC1h 35m
2026-07-09 JLG403 - Jul 9, 23:40 UTCJul 10, 00:10 UTC30m
2026-07-09 JLG403 - Jul 9, 19:15 UTCJul 9, 19:50 UTC35m
2026-07-08 JLG403 LUK → IND Jul 8, 07:40 UTCJul 8, 08:05 UTC25m
2026-07-08 JLG403 - Jul 8, 05:05 UTCJul 8, 05:35 UTC30m
2026-07-07 JLG403 - Jul 7, 10:15 UTCJul 7, 12:05 UTC1h 50m
2026-07-07 JLG403 IND → RDU Jul 7, 07:55 UTCJul 7, 09:35 UTC1h 40m
2026-07-05 JLG403 - Jul 5, 19:40 UTCJul 5, 20:05 UTC25m
2026-07-05 JLG403 - Jul 5, 16:00 UTCJul 5, 16:25 UTC25m
2026-06-30 JLG403 - Jun 30, 03:00 UTCJun 30, 03:55 UTC55m
2026-06-27 JLG403 - Jun 27, 22:15 UTCJun 27, 22:35 UTC20m
2026-06-27 JLG403 - Jun 27, 16:10 UTCJun 27, 16:30 UTC20m
2026-06-27 JLG403 - Jun 27, 00:29 UTCJun 27, 00:50 UTC20m
2026-06-26 JLG403 - Jun 26, 23:19 UTCJun 26, 23:34 UTC15m
2026-06-26 JLG403 - Jun 26, 17:40 UTCJun 26, 17:59 UTC20m
2026-06-26 JLG403 - Jun 26, 13:34 UTCJun 26, 15:45 UTC2h 10m
2026-06-26 JLG403 - Jun 26, 09:39 UTCJun 26, 12:14 UTC2h 35m
2026-06-26 JLG403 - Jun 26, 03:45 UTCJun 26, 04:04 UTC20m
2026-06-25 JLG403 - Jun 25, 22:54 UTCJun 25, 23:14 UTC20m
2026-06-24 JLG403 - Jun 24, 18:09 UTCJun 24, 18:34 UTC25m
2026-06-24 JLG403 - Jun 24, 13:34 UTCJun 24, 13:54 UTC20m
2026-06-24 JLG403 - Jun 24, 05:44 UTCJun 24, 06:20 UTC35m
2026-06-24 JLG403 - Jun 24, 04:00 UTCJun 24, 04:34 UTC35m

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 N403TX page for operator, model, and routing details .

Mode-S A4B985 frequently asked

What is Mode-S code A4B985?
A4B985 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N403TX.
Where is Mode-S A4B985 registered?
Mode-S code A4B985 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 A4B985 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4B985, octal 51134605, decimal 10,795,397.
What flights does A4B985 operate?
Mode-S A4B985 has broadcast 1 distinct callsign, including JLG403.