Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A664BB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N51069 · CESSNA 150 · operated by SPORT FLYER LLC

Hex
A664BB
Octal
51462273
Decimal
10,904,763
Country
US
Tail
N51069
Type
C150
No current signal · last broadcast Jul 5, 04:10 UTC
Flights observed
23
Distinct callsigns
1
Country
US
Last broadcast
Jul 5, 04:10 UTC

Last known position

Most recent position reported by Mode-S A664BB.

Country allocation

The ICAO 24-bit address A664BB 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
N51069 - 23 2026-07-05

Recent flights last 23

DateFlightRouteTakeoffLandingDuration
2026-07-05 N51069 - Jul 5, 03:30 UTCJul 5, 04:10 UTC40m
2026-07-05 N51069 - Jul 5, 00:45 UTCJul 5, 01:30 UTC45m
2026-07-04 N51069 - Jul 4, 19:50 UTCJul 4, 21:35 UTC1h 45m
2026-06-29 N51069 - Jun 29, 02:39 UTCJun 29, 03:05 UTC25m
2026-06-29 N51069 - Jun 29, 01:29 UTCJun 29, 02:20 UTC50m
2026-06-28 N51069 - Jun 28, 17:44 UTCJun 28, 19:09 UTC1h 25m
2026-06-22 N51069 - Jun 22, 00:20 UTCJun 22, 01:49 UTC1h 30m
2026-06-21 N51069 - Jun 21, 20:24 UTCJun 21, 22:24 UTC2h 0m
2026-06-21 N51069 BNG → SBD Jun 21, 19:14 UTCJun 21, 19:29 UTC15m
2026-06-21 N51069 - Jun 21, 16:49 UTCJun 21, 18:35 UTC1h 45m
2026-06-20 N51069 - Jun 20, 18:19 UTCJun 20, 18:49 UTC30m
2026-06-19 N51069 - Jun 19, 18:05 UTCJun 19, 18:30 UTC25m
2026-06-13 N51069 - Jun 13, 19:40 UTCJun 13, 20:25 UTC45m
2026-06-13 N51069 - Jun 13, 17:10 UTCJun 13, 18:10 UTC1h 0m
2026-06-09 N51069 - Jun 9, 14:35 UTCJun 9, 15:00 UTC25m
2026-05-26 N51069 - May 26, 14:55 UTCMay 26, 15:20 UTC25m
2026-05-22 N51069 - May 22, 21:00 UTCMay 22, 22:45 UTC1h 45m
2026-05-22 N51069 - May 22, 16:15 UTCMay 22, 18:25 UTC2h 10m
2026-05-16 N51069 - May 16, 21:45 UTCMay 16, 22:05 UTC20m
2026-05-16 N51069 - May 16, 19:10 UTCMay 16, 19:35 UTC25m
2026-04-18 N51069 - Apr 18, 01:25 UTCApr 18, 01:45 UTC20m
2026-04-18 N51069 - Apr 18, 01:10 UTCApr 18, 01:20 UTC10m
2026-04-17 N51069 - Apr 17, 23:40 UTCApr 17, 23:55 UTC15m

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 N51069 page for operator, model, and routing details .

Mode-S A664BB frequently asked

What is Mode-S code A664BB?
A664BB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N51069.
Where is Mode-S A664BB registered?
Mode-S code A664BB 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 A664BB broadcasting right now?
No active broadcast right now. Last signal was Jul 5, 04:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A664BB, octal 51462273, decimal 10,904,763.
What flights does A664BB operate?
Mode-S A664BB has broadcast 1 distinct callsign, including N51069.