Apparatus

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sensors Mode-S transponder

A15743

ICAO 24-bit transponder address · allocated to United States

Hex
A15743
Octal
50253503
Decimal
10,573,635
Country
US
No current signal · last broadcast 7h ago
Flights observed
152
Distinct callsigns
1
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A15743.

Country allocation

The ICAO 24-bit address A15743 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
KOW186 - 152 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KOW186 - Jul 13, 17:10 UTCJul 13, 19:45 UTC2h 35m
2026-07-13 KOW186 - Jul 13, 14:10 UTCJul 13, 14:30 UTC20m
2026-07-13 KOW186 - Jul 13, 12:30 UTCJul 13, 13:10 UTC40m
2026-07-12 KOW186 - Jul 12, 21:05 UTCJul 12, 23:35 UTC2h 30m
2026-07-12 KOW186 - Jul 12, 17:30 UTCJul 12, 20:10 UTC2h 40m
2026-07-11 KOW186 LAS → TEB Jul 11, 13:55 UTCJul 11, 18:20 UTC4h 25m
2026-07-10 KOW186 - Jul 10, 19:25 UTCJul 11, 00:00 UTC4h 35m
2026-07-09 KOW186 - Jul 9, 21:20 UTCJul 9, 23:55 UTC2h 35m
2026-07-09 KOW186 - Jul 9, 18:30 UTCJul 9, 20:15 UTC1h 45m
2026-07-08 KOW186 - Jul 8, 15:10 UTCJul 8, 16:25 UTC1h 15m
2026-07-07 KOW186 - Jul 7, 14:15 UTCJul 7, 19:40 UTC5h 25m
2026-07-06 KOW186 - Jul 6, 17:15 UTCJul 6, 22:05 UTC4h 50m
2026-07-05 KOW186 - Jul 5, 14:50 UTCJul 5, 20:15 UTC5h 25m
2026-07-04 KOW186 - Jul 4, 12:45 UTCJul 4, 15:45 UTC3h 0m
2026-07-03 KOW186 - Jul 3, 20:40 UTCJul 3, 21:30 UTC50m
2026-07-03 KOW186 - Jul 3, 00:20 UTCJul 3, 02:45 UTC2h 25m
2026-07-02 KOW186 SBA → HPN Jul 2, 16:50 UTCJul 2, 21:55 UTC5h 5m
2026-07-02 KOW186 HWD → SBA Jul 2, 01:55 UTCJul 2, 02:35 UTC40m
2026-07-02 KOW186 - Jul 2, 00:30 UTCJul 2, 01:10 UTC40m
2026-07-01 KOW186 - Jul 1, 18:45 UTCJul 1, 23:50 UTC5h 5m
2026-07-01 KOW186 - Jul 1, 01:50 UTCJul 1, 02:10 UTC20m
2026-06-30 KOW186 OAK → TEB Jun 30, 19:55 UTCJul 1, 00:55 UTC5h 0m
2026-06-29 KOW186 SFO → OAK Jun 29, 23:09 UTCJun 29, 23:19 UTC10m
2026-06-29 KOW186 AUS → SFO Jun 29, 18:44 UTCJun 29, 22:19 UTC3h 35m
2026-06-28 KOW186 - Jun 28, 19:04 UTCJun 28, 19:34 UTC30m
2026-06-28 KOW186 - Jun 28, 16:00 UTCJun 28, 18:10 UTC2h 10m
2026-06-28 KOW186 - Jun 28, 12:19 UTCJun 28, 14:54 UTC2h 35m
2026-06-27 KOW186 - Jun 27, 18:24 UTCJun 27, 22:15 UTC3h 50m
2026-06-26 KOW186 - Jun 26, 18:15 UTCJun 26, 18:29 UTC15m
2026-06-26 KOW186 - Jun 26, 15:54 UTCJun 26, 17:44 UTC1h 50m
2026-06-26 KOW186 - Jun 26, 11:40 UTCJun 26, 13:30 UTC1h 50m
2026-06-25 KOW186 BED → MVY Jun 25, 20:49 UTCJun 25, 21:10 UTC20m
2026-06-25 KOW186 - Jun 25, 17:14 UTCJun 25, 19:39 UTC2h 25m
2026-06-25 KOW186 - Jun 25, 14:20 UTCJun 25, 15:29 UTC1h 10m
2026-06-24 KOW186 TEB → PWK Jun 24, 23:10 UTCJun 25, 01:09 UTC2h 0m
2026-06-24 KOW186 IAD → TEB Jun 24, 18:05 UTCJun 24, 18:50 UTC45m
2026-06-24 KOW186 - Jun 24, 13:54 UTCJun 24, 14:45 UTC50m
2026-06-23 KOW186 - Jun 23, 23:00 UTCJun 23, 23:24 UTC25m
2026-06-22 KOW186 - Jun 22, 23:35 UTCJun 23, 03:15 UTC3h 40m
2026-06-21 KOW186 - Jun 21, 16:49 UTCJun 21, 20:54 UTC4h 5m
2026-06-21 KOW186 - Jun 21, 14:50 UTCJun 21, 15:40 UTC50m
2026-06-19 KOW186 SJC → TEB Jun 19, 17:49 UTCJun 19, 22:34 UTC4h 45m
2026-06-19 KOW186 - Jun 19, 03:55 UTCJun 19, 05:40 UTC1h 45m
2026-06-19 KOW186 DEN → BFI Jun 19, 00:29 UTCJun 19, 02:54 UTC2h 25m
2026-06-17 KOW186 OAK → DEN Jun 17, 20:10 UTCJun 17, 22:20 UTC2h 10m
2026-06-16 KOW186 TEB → OAK Jun 16, 15:50 UTCJun 16, 21:20 UTC5h 31m
2026-06-15 KOW186 - Jun 15, 20:04 UTCJun 15, 23:15 UTC3h 10m
2026-06-15 KOW186 - Jun 15, 16:30 UTCJun 15, 19:00 UTC2h 30m
2026-06-15 KOW186 - Jun 15, 13:40 UTCJun 15, 15:30 UTC1h 50m
2026-06-14 KOW186 - Jun 14, 18:15 UTCJun 14, 20:45 UTC2h 30m

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.

Mode-S A15743 frequently asked

What is Mode-S code A15743?
A15743 is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A15743 registered?
Mode-S code A15743 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 A15743 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A15743, octal 50253503, decimal 10,573,635.
What flights does A15743 operate?
Mode-S A15743 has broadcast 1 distinct callsign, including KOW186.