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sensors Mode-S transponder

A664C9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5107N · CESSNA 172 Skyhawk · operated by CHRISTIANSEN AVIATION LLC

Hex
A664C9
Octal
51462311
Decimal
10,904,777
Country
US
Tail
N5107N
Type
C172
Broadcasting now · callsign BPX203 · 75 ft
Flights observed
243
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Current position

A664C9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A664C9 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
BPX203 - 243 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 BPX203 - Jul 14, 11:15 UTCJul 14, 12:35 UTC1h 20m
2026-07-14 BPX203 - Jul 14, 00:25 UTCJul 14, 01:10 UTC45m
2026-07-13 BPX203 - Jul 13, 17:15 UTCJul 13, 18:20 UTC1h 5m
2026-07-13 BPX203 - Jul 13, 13:30 UTCJul 13, 15:00 UTC1h 30m
2026-07-13 BPX203 - Jul 13, 11:25 UTCJul 13, 12:45 UTC1h 20m
2026-07-12 BPX203 - Jul 12, 13:45 UTCJul 12, 14:50 UTC1h 5m
2026-07-11 BPX203 - Jul 11, 13:30 UTCJul 11, 15:10 UTC1h 40m
2026-07-10 BPX203 - Jul 10, 17:45 UTCJul 10, 19:05 UTC1h 20m
2026-07-10 BPX203 - Jul 10, 14:50 UTCJul 10, 16:25 UTC1h 35m
2026-07-10 BPX203 - Jul 10, 11:50 UTCJul 10, 13:15 UTC1h 25m
2026-07-09 BPX203 - Jul 9, 22:45 UTCJul 9, 23:50 UTC1h 5m
2026-07-09 BPX203 - Jul 9, 19:50 UTCJul 9, 20:25 UTC35m
2026-07-09 BPX203 - Jul 9, 16:20 UTCJul 9, 17:20 UTC1h 0m
2026-07-09 BPX203 - Jul 9, 15:05 UTCJul 9, 15:20 UTC15m
2026-07-09 BPX203 - Jul 9, 14:15 UTCJul 9, 14:25 UTC10m
2026-07-09 BPX203 - Jul 9, 11:00 UTCJul 9, 12:35 UTC1h 35m
2026-07-09 BPX203 - Jul 9, 01:10 UTCJul 9, 01:20 UTC10m
2026-07-08 BPX203 - Jul 8, 23:30 UTCJul 9, 00:20 UTC50m
2026-07-08 BPX203 - Jul 8, 22:35 UTCJul 8, 22:45 UTC10m
2026-07-08 BPX203 - Jul 8, 16:10 UTCJul 8, 16:55 UTC45m
2026-07-08 BPX203 - Jul 8, 13:35 UTCJul 8, 14:25 UTC50m
2026-07-08 BPX203 - Jul 8, 11:05 UTCJul 8, 12:35 UTC1h 30m
2026-07-07 BPX203 - Jul 7, 15:35 UTCJul 7, 17:40 UTC2h 5m
2026-07-07 BPX203 - Jul 7, 12:35 UTCJul 7, 13:55 UTC1h 20m
2026-07-06 BPX203 - Jul 6, 14:00 UTCJul 6, 15:25 UTC1h 25m
2026-07-06 BPX203 - Jul 6, 11:50 UTCJul 6, 12:50 UTC1h 0m
2026-07-02 BPX203 - Jul 2, 23:35 UTCJul 3, 00:45 UTC1h 10m
2026-06-30 BPX203 - Jun 30, 12:50 UTCJun 30, 14:15 UTC1h 25m
2026-06-29 BPX203 - Jun 29, 22:55 UTCJun 30, 00:20 UTC1h 25m
2026-06-29 BPX203 - Jun 29, 18:19 UTCJun 29, 19:09 UTC50m
2026-06-29 BPX203 - Jun 29, 14:19 UTCJun 29, 15:14 UTC55m
2026-06-29 BPX203 - Jun 29, 11:25 UTCJun 29, 12:45 UTC1h 20m
2026-06-28 BPX203 - Jun 28, 14:50 UTCJun 28, 16:14 UTC1h 25m
2026-06-27 BPX203 - Jun 27, 16:44 UTCJun 27, 17:55 UTC1h 10m
2026-06-27 BPX203 - Jun 27, 13:55 UTCJun 27, 14:49 UTC55m
2026-06-26 BPX203 - Jun 26, 20:24 UTCJun 26, 21:15 UTC50m
2026-06-26 BPX203 - Jun 26, 16:20 UTCJun 26, 17:59 UTC1h 40m
2026-06-26 BPX203 - Jun 26, 13:55 UTCJun 26, 15:05 UTC1h 10m
2026-06-26 BPX203 - Jun 26, 11:24 UTCJun 26, 12:29 UTC1h 5m
2026-06-25 BPX203 - Jun 25, 17:49 UTCJun 25, 19:15 UTC1h 25m
2026-06-25 BPX203 - Jun 25, 15:59 UTCJun 25, 17:05 UTC1h 5m
2026-06-25 BPX203 - Jun 25, 14:09 UTCJun 25, 14:39 UTC30m
2026-06-25 BPX203 - Jun 25, 13:14 UTCJun 25, 13:29 UTC15m
2026-06-24 BPX203 - Jun 24, 21:19 UTCJun 24, 22:19 UTC1h 0m
2026-06-24 BPX203 - Jun 24, 15:49 UTCJun 24, 16:19 UTC30m
2026-06-24 BPX203 - Jun 24, 15:05 UTCJun 24, 15:14 UTC10m
2026-06-24 BPX203 - Jun 24, 12:54 UTCJun 24, 13:05 UTC10m
2026-06-23 BPX203 - Jun 23, 23:34 UTCJun 23, 23:50 UTC15m
2026-06-23 BPX203 - Jun 23, 21:39 UTCJun 23, 22:40 UTC1h 0m
2026-06-23 BPX203 - Jun 23, 15:40 UTCJun 23, 16:35 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 N5107N page for operator, model, and routing details .

Mode-S A664C9 frequently asked

What is Mode-S code A664C9?
A664C9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5107N.
Where is Mode-S A664C9 registered?
Mode-S code A664C9 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 A664C9 broadcasting right now?
Yes. Mode-S A664C9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A664C9, octal 51462311, decimal 10,904,777.
What flights does A664C9 operate?
Mode-S A664C9 has broadcast 1 distinct callsign, including BPX203.