Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A20CB6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N231FB · operated by WELSCH RYAN

Hex
A20CB6
Octal
50406266
Decimal
10,620,086
Country
US
Tail
N231FB
No current signal · last broadcast 7d ago
Flights observed
45
Distinct callsigns
1
Country
US
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S A20CB6.

Country allocation

The ICAO 24-bit address A20CB6 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
N231FB - 45 2026-07-26

Recent flights last 45

DateFlightRouteTakeoffLandingDuration
2026-07-26 N231FB - Jul 26, 18:35 UTCJul 26, 19:00 UTC25m
2026-07-26 N231FB - Jul 26, 15:40 UTCJul 26, 18:00 UTC2h 20m
2026-07-17 N231FB - Jul 17, 23:50 UTCJul 18, 00:29 UTC40m
2026-07-17 N231FB - Jul 17, 21:50 UTCJul 17, 23:14 UTC1h 25m
2026-07-17 N231FB - Jul 17, 20:29 UTCJul 17, 21:10 UTC40m
2026-07-15 N231FB - Jul 15, 19:45 UTCJul 15, 21:10 UTC1h 25m
2026-07-15 N231FB - Jul 15, 17:20 UTCJul 15, 18:30 UTC1h 10m
2026-07-15 N231FB - Jul 15, 13:45 UTCJul 15, 16:45 UTC3h 0m
2026-07-12 N231FB - Jul 12, 17:55 UTCJul 12, 18:05 UTC10m
2026-07-12 N231FB - Jul 12, 13:01 UTCJul 12, 13:35 UTC35m
2026-07-07 N231FB - Jul 7, 13:35 UTCJul 7, 13:55 UTC20m
2026-07-04 N231FB - Jul 4, 12:30 UTCJul 4, 13:15 UTC45m
2026-07-04 N231FB - Jul 4, 00:00 UTCJul 4, 00:25 UTC25m
2026-07-01 N231FB - Jul 1, 22:50 UTCJul 1, 23:10 UTC20m
2026-06-24 N231FB - Jun 24, 15:54 UTCJun 24, 17:34 UTC1h 40m
2026-06-18 N231FB - Jun 18, 00:50 UTCJun 18, 01:05 UTC15m
2026-06-16 N231FB - Jun 16, 23:40 UTCJun 17, 00:05 UTC25m
2026-06-14 N231FB - Jun 14, 14:25 UTCJun 14, 14:55 UTC30m
2026-06-14 N231FB - Jun 14, 12:00 UTCJun 14, 12:40 UTC40m
2026-06-10 N231FB - Jun 10, 10:35 UTCJun 10, 11:15 UTC40m
2026-06-10 N231FB - Jun 10, 00:20 UTCJun 10, 01:35 UTC1h 15m
2026-06-09 N231FB - Jun 9, 23:20 UTCJun 9, 23:40 UTC20m
2026-06-09 N231FB - Jun 9, 21:45 UTCJun 9, 22:10 UTC25m
2026-06-09 N231FB - Jun 9, 19:50 UTCJun 9, 20:30 UTC40m
2026-06-08 N231FB - Jun 8, 13:45 UTCJun 8, 14:45 UTC1h 0m
2026-06-04 N231FB - Jun 4, 20:45 UTCJun 4, 23:50 UTC3h 5m
2026-06-04 N231FB - Jun 4, 14:35 UTCJun 4, 16:20 UTC1h 45m
2026-06-03 N231FB - Jun 3, 13:05 UTCJun 3, 14:30 UTC1h 25m
2026-06-01 N231FB - Jun 1, 23:20 UTCJun 2, 00:15 UTC55m
2026-05-31 N231FB - May 31, 16:10 UTCMay 31, 17:50 UTC1h 40m
2026-05-29 N231FB - May 29, 20:25 UTCMay 30, 00:40 UTC4h 15m
2026-05-28 N231FB - May 28, 18:35 UTCMay 28, 19:35 UTC1h 0m
2026-05-28 N231FB - May 28, 16:00 UTCMay 28, 16:45 UTC45m
2026-05-20 N231FB - May 20, 21:20 UTCMay 20, 21:50 UTC30m
2026-05-20 N231FB - May 20, 20:10 UTCMay 20, 20:40 UTC30m
2026-05-20 N231FB - May 20, 13:10 UTCMay 20, 13:45 UTC35m
2026-05-19 N231FB - May 19, 00:15 UTCMay 19, 00:35 UTC20m
2026-05-18 N231FB - May 18, 18:50 UTCMay 18, 19:20 UTC30m
2026-05-18 N231FB - May 18, 15:50 UTCMay 18, 18:15 UTC2h 25m
2026-05-15 N231FB - May 15, 23:50 UTCMay 16, 00:05 UTC15m
2026-05-15 N231FB - May 15, 15:50 UTCMay 15, 16:00 UTC10m
2026-05-15 N231FB - May 15, 13:45 UTCMay 15, 14:00 UTC15m
2026-04-20 N231FB - Apr 20, 13:20 UTCApr 20, 15:35 UTC2h 15m
2026-04-19 N231FB - Apr 19, 15:20 UTCApr 19, 16:05 UTC45m
2026-04-19 N231FB - Apr 19, 13:10 UTCApr 19, 14:25 UTC1h 15m

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 N231FB page for operator, model, and routing details .

Mode-S A20CB6 frequently asked

What is Mode-S code A20CB6?
A20CB6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N231FB.
Where is Mode-S A20CB6 registered?
Mode-S code A20CB6 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 A20CB6 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A20CB6, octal 50406266, decimal 10,620,086.
What flights does A20CB6 operate?
Mode-S A20CB6 has broadcast 1 distinct callsign, including N231FB.