Apparatus

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sensors Mode-S transponder

AB2164

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N816TW · PILATUS PC-12 · operated by BEDFORD PARTNERS LLC

Hex
AB2164
Octal
52620544
Decimal
11,215,204
Country
US
Tail
N816TW
Type
PC12
No current signal · last broadcast 10h ago
Flights observed
438
Distinct callsigns
20
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S AB2164.

Country allocation

The ICAO 24-bit address AB2164 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
GPD150 - 20 2026-07-13
GPD151 - 19 2026-07-13
GPD153 - 18 2026-07-10
GPD154 - 16 2026-07-10
GPD152 - 16 2026-07-10
GPD155 - 15 2026-07-13
GPD122 - 13 2026-07-08
GPD124 - 12 2026-07-11
GPD905 Tradewind Aviation 10 2026-05-13
GPD172 - 10 2026-07-13
GPD123 - 10 2026-07-04
GPD114 Tradewind Aviation 9 2026-05-31
GPD103 Tradewind Aviation 9 2026-05-31
GPD904 Tradewind Aviation 8 2026-05-11
GPD171 - 8 2026-07-05
GPD116 - 8 2026-06-26
GPD115 - 8 2026-06-21
GPD903 - 7 2026-07-07
GPD902 Tradewind Aviation 7 2026-05-13
GPD173 - 7 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 GPD155 - Jul 13, 21:30 UTCJul 13, 21:50 UTC20m
2026-07-13 GPD172 - Jul 13, 15:55 UTCJul 13, 16:20 UTC25m
2026-07-13 GPD151 - Jul 13, 14:25 UTCJul 13, 14:45 UTC20m
2026-07-13 GPD150 - Jul 13, 12:30 UTCJul 13, 12:55 UTC25m
2026-07-12 GPD173 - Jul 12, 17:20 UTCJul 12, 17:40 UTC20m
2026-07-12 GPD172 - Jul 12, 15:40 UTCJul 12, 16:05 UTC25m
2026-07-12 GPD989 - Jul 12, 14:20 UTCJul 12, 14:30 UTC10m
2026-07-11 GPD124 - Jul 11, 17:50 UTCJul 11, 18:20 UTC30m
2026-07-11 GPD972 - Jul 11, 15:05 UTCJul 11, 15:15 UTC10m
2026-07-11 GPD782 - Jul 11, 13:40 UTCJul 11, 13:55 UTC15m
2026-07-11 GPD121 - Jul 11, 12:30 UTCJul 11, 12:50 UTC20m
2026-07-10 GPD154 - Jul 10, 19:10 UTCJul 10, 19:40 UTC30m
2026-07-10 GPD153 - Jul 10, 17:55 UTCJul 10, 18:15 UTC20m
2026-07-10 GPD152 - Jul 10, 16:00 UTCJul 10, 16:30 UTC30m
2026-07-10 GPD151 - Jul 10, 14:05 UTCJul 10, 14:25 UTC20m
2026-07-10 GPD150 - Jul 10, 12:10 UTCJul 10, 12:35 UTC25m
2026-07-09 GPD155 - Jul 9, 21:15 UTCJul 9, 21:35 UTC20m
2026-07-09 GPD154 - Jul 9, 19:20 UTCJul 9, 19:50 UTC30m
2026-07-09 GPD173 - Jul 9, 18:00 UTCJul 9, 18:15 UTC15m
2026-07-09 GPD172 - Jul 9, 16:10 UTCJul 9, 16:35 UTC25m
2026-07-09 GPD151 - Jul 9, 14:20 UTCJul 9, 14:35 UTC15m
2026-07-09 GPD150 - Jul 9, 12:25 UTCJul 9, 12:50 UTC25m
2026-07-08 GPD155 - Jul 8, 21:50 UTCJul 8, 22:15 UTC25m
2026-07-08 GPD154 - Jul 8, 20:00 UTCJul 8, 20:30 UTC30m
2026-07-08 GPD153 - Jul 8, 19:00 UTCJul 8, 19:25 UTC25m
2026-07-08 GPD152 - Jul 8, 16:55 UTCJul 8, 17:25 UTC30m
2026-07-08 GPD113 - Jul 8, 16:00 UTCJul 8, 16:20 UTC20m
2026-07-08 GPD122 - Jul 8, 14:10 UTCJul 8, 14:35 UTC25m
2026-07-08 GPD121 - Jul 8, 12:55 UTCJul 8, 13:15 UTC20m
2026-07-08 GPD100 - Jul 8, 10:55 UTCJul 8, 11:25 UTC30m
2026-07-07 GPD155B - Jul 7, 21:35 UTCJul 7, 22:00 UTC25m
2026-07-07 GPD154B - Jul 7, 19:45 UTCJul 7, 20:15 UTC30m
2026-07-07 GPD153 - Jul 7, 18:00 UTCJul 7, 18:20 UTC20m
2026-07-07 GPD152 - Jul 7, 15:55 UTCJul 7, 16:20 UTC25m
2026-07-07 GPD903 - Jul 7, 14:40 UTCJul 7, 14:55 UTC15m
2026-07-07 GPD354 SBH → SJU Jul 7, 13:30 UTCJul 7, 13:45 UTC15m
2026-07-06 GPD155 - Jul 6, 21:10 UTCJul 6, 21:35 UTC25m
2026-07-06 GPD154 - Jul 6, 19:20 UTCJul 6, 19:45 UTC25m
2026-07-06 GPD153 - Jul 6, 18:00 UTCJul 6, 18:20 UTC20m
2026-07-06 GPD152 - Jul 6, 16:05 UTCJul 6, 16:30 UTC25m
2026-07-06 GPD151 - Jul 6, 14:15 UTCJul 6, 14:35 UTC20m
2026-07-06 GPD150 - Jul 6, 12:05 UTCJul 6, 12:35 UTC30m
2026-07-05 GPD155 - Jul 5, 21:25 UTCJul 5, 21:40 UTC15m
2026-07-05 GPD174 - Jul 5, 19:05 UTCJul 5, 19:35 UTC30m
2026-07-05 GPD153 - Jul 5, 17:55 UTCJul 5, 18:15 UTC20m
2026-07-05 GPD152 - Jul 5, 15:55 UTCJul 5, 16:20 UTC25m
2026-07-05 GPD171 - Jul 5, 14:20 UTCJul 5, 14:35 UTC15m
2026-07-05 GPD150 - Jul 5, 12:10 UTCJul 5, 12:35 UTC25m
2026-07-04 GPD155 - Jul 4, 20:25 UTCJul 4, 20:50 UTC25m
2026-07-04 GPD124 - Jul 4, 17:40 UTCJul 4, 18:05 UTC25m

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 N816TW page for operator, model, and routing details .

Mode-S AB2164 frequently asked

What is Mode-S code AB2164?
AB2164 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N816TW.
Where is Mode-S AB2164 registered?
Mode-S code AB2164 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 AB2164 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB2164, octal 52620544, decimal 11,215,204.
What flights does AB2164 operate?
Mode-S AB2164 has broadcast 20 distinct callsigns, including GPD150, GPD151, GPD153, GPD154, GPD152.