Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A99257

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N716A · BEECHCRAFT Super King Air 350 · operated by US DEPARTMENT OF HOMELAND SECURITY, US CUSTOMS & BORDER PROTECTION, OFFICE OF AIR & MARINE

Hex
A99257
Octal
52311127
Decimal
11,113,047
Country
US
Tail
N716A
Type
B350
No current signal · last broadcast 15d ago
Flights observed
86
Distinct callsigns
1
Country
US
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S A99257.

Country allocation

The ICAO 24-bit address A99257 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
TROY328 - 86 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TROY328 - Jul 26, 01:55 UTCJul 26, 02:05 UTC10m
2026-07-25 TROY328 - Jul 25, 23:45 UTCJul 25, 23:55 UTC10m
2026-07-25 TROY328 - Jul 25, 00:10 UTCJul 25, 02:00 UTC1h 50m
2026-07-24 TROY328 - Jul 24, 02:45 UTCJul 24, 02:55 UTC10m
2026-07-24 TROY328 - Jul 24, 00:05 UTCJul 24, 00:45 UTC40m
2026-07-23 TROY328 - Jul 23, 17:05 UTCJul 23, 17:40 UTC35m
2026-07-21 TROY328 NZY → NZY Jul 21, 13:05 UTCJul 21, 15:15 UTC2h 10m
2026-07-21 TROY328 - Jul 21, 02:05 UTCJul 21, 02:10 UTC5m
2026-07-21 TROY328 - Jul 21, 00:05 UTCJul 21, 00:20 UTC15m
2026-07-17 TROY328 NZY → NZY Jul 17, 00:10 UTCJul 17, 02:15 UTC2h 5m
2026-07-16 TROY328 NZY → NZY Jul 16, 20:39 UTCJul 16, 22:45 UTC2h 5m
2026-07-16 TROY328 - Jul 16, 04:15 UTCJul 16, 05:00 UTC45m
2026-07-16 TROY328 - Jul 16, 03:20 UTCJul 16, 03:50 UTC30m
2026-07-16 TROY328 - Jul 16, 01:10 UTCJul 16, 01:40 UTC30m
2026-07-16 TROY328 - Jul 16, 00:10 UTCJul 16, 00:15 UTC5m
2026-07-15 TROY328 - Jul 15, 02:35 UTCJul 15, 03:15 UTC40m
2026-07-15 TROY328 - Jul 15, 01:30 UTCJul 15, 01:35 UTC5m
2026-07-15 TROY328 - Jul 15, 00:05 UTCJul 15, 00:30 UTC25m
2026-07-14 TROY328 NZY → RIV Jul 14, 15:55 UTCJul 14, 16:25 UTC30m
2026-07-13 TROY328 - Jul 13, 01:10 UTCJul 13, 01:20 UTC10m
2026-07-12 TROY328 - Jul 12, 23:40 UTCJul 12, 23:55 UTC15m
2026-07-10 TROY328 - Jul 10, 19:45 UTCJul 10, 20:10 UTC25m
2026-07-10 TROY328 - Jul 10, 18:05 UTCJul 10, 18:25 UTC20m
2026-07-10 TROY328 - Jul 10, 17:00 UTCJul 10, 17:15 UTC15m
2026-07-10 TROY328 NZY → RIV Jul 10, 14:20 UTCJul 10, 15:25 UTC1h 5m
2026-07-09 TROY328 - Jul 9, 23:25 UTCJul 10, 00:45 UTC1h 20m
2026-07-09 TROY328 - Jul 9, 19:00 UTCJul 9, 19:20 UTC20m
2026-07-09 TROY328 - Jul 9, 16:35 UTCJul 9, 17:05 UTC30m
2026-07-09 TROY328 NZY → NZY Jul 9, 01:10 UTCJul 9, 03:50 UTC2h 40m
2026-07-08 TROY328 - Jul 8, 02:00 UTCJul 8, 03:10 UTC1h 10m
2026-07-08 TROY328 - Jul 8, 01:45 UTCJul 8, 01:50 UTC5m
2026-07-08 TROY328 - Jul 8, 01:30 UTCJul 8, 01:35 UTC5m
2026-07-08 TROY328 - Jul 8, 00:15 UTCJul 8, 01:15 UTC1h 0m
2026-07-05 TROY328 - Jul 5, 16:10 UTCJul 5, 16:15 UTC5m
2026-07-03 TROY328 - Jul 3, 21:45 UTCJul 3, 21:55 UTC10m
2026-07-03 TROY328 - Jul 3, 01:55 UTCJul 3, 02:20 UTC25m
2026-07-03 TROY328 NZY → RIV Jul 3, 00:00 UTCJul 3, 01:40 UTC1h 40m
2026-07-02 TROY328 - Jul 2, 01:40 UTCJul 2, 02:05 UTC25m
2026-07-02 TROY328 - Jul 2, 01:25 UTCJul 2, 01:30 UTC5m
2026-07-02 TROY328 - Jul 2, 01:10 UTCJul 2, 01:20 UTC10m
2026-07-02 TROY328 NZY → RIV Jul 2, 00:05 UTCJul 2, 01:05 UTC1h 0m
2026-07-01 TROY328 - Jul 1, 01:10 UTCJul 1, 01:30 UTC20m
2026-06-30 TROY328 - Jun 30, 23:45 UTCJun 30, 23:50 UTC5m
2026-06-26 TROY328 - Jun 26, 23:44 UTCJun 27, 00:34 UTC50m
2026-06-26 TROY328 - Jun 26, 16:44 UTCJun 26, 17:44 UTC1h 0m
2026-06-26 TROY328 NZY → BFL Jun 26, 15:25 UTCJun 26, 16:20 UTC55m
2026-06-04 TROY328 - Jun 4, 05:10 UTCJun 4, 05:45 UTC35m
2026-06-04 TROY328 - Jun 4, 03:15 UTCJun 4, 04:15 UTC1h 0m
2026-06-01 TROY328 - Jun 1, 05:35 UTCJun 1, 06:10 UTC35m
2026-06-01 TROY328 - Jun 1, 03:35 UTCJun 1, 04:10 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 N716A page for operator, model, and routing details .

Mode-S A99257 frequently asked

What is Mode-S code A99257?
A99257 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N716A.
Where is Mode-S A99257 registered?
Mode-S code A99257 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 A99257 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A99257, octal 52311127, decimal 11,113,047.
What flights does A99257 operate?
Mode-S A99257 has broadcast 1 distinct callsign, including TROY328.