Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A23F0E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N244CA · TECNAM P-2012 Traveller · operated by HYANNIS AIR SERVICE INC

Hex
A23F0E
Octal
50437416
Decimal
10,632,974
Country
US
Tail
N244CA
Type
P212
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
288
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A23F0E.

Country allocation

The ICAO 24-bit address A23F0E 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
KAP164 Cape Air 56 2026-07-26
KAP734 - 23 2026-07-06
KAP480 - 19 2026-07-15
KAP155 Cape Air 16 2026-05-30
KAP52 Cape Air 14 2026-07-26
KAP60 - 12 2026-07-22
KAP70 - 8 2026-07-22
KAP219 Cape Air 7 2026-04-14
KAP14 - 7 2026-06-14
KAP5021 - 6 2026-07-23
KAP388 - 6 2026-07-08
KAP1016 Cape Air 5 2026-04-28
KAP626 Cape Air 4 2026-07-23
KAP5483 - 4 2026-04-16
KAP45 - 4 2026-07-07
KAPT94 - 3 2026-05-29
KAP926 - 3 2026-07-07
KAP777 Cape Air 3 2026-05-27
KAP7101 Cape Air 3 2026-06-03
KAP6107 Cape Air 3 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAP63 BOS → RUT Jul 26, 21:20 UTCJul 26, 21:30 UTC10m
2026-07-26 KAP164 MVY → HYA Jul 26, 20:05 UTCJul 26, 20:40 UTC35m
2026-07-26 KAP164 MVY → HYA Jul 26, 19:05 UTCJul 26, 19:20 UTC15m
2026-07-26 KAP164 MVY → HYA Jul 26, 16:25 UTCJul 26, 16:45 UTC20m
2026-07-26 KAP164 MVY → HYA Jul 26, 15:00 UTCJul 26, 15:30 UTC30m
2026-07-26 KAP164 MVY → HYA Jul 26, 12:50 UTCJul 26, 13:25 UTC35m
2026-07-26 KAP52 RUT → BOS Jul 26, 11:15 UTCJul 26, 12:05 UTC50m
2026-07-25 KAP164 MVY → HYA Jul 25, 21:30 UTCJul 25, 22:10 UTC40m
2026-07-25 KAP164 MVY → HYA Jul 25, 20:10 UTCJul 25, 20:35 UTC25m
2026-07-25 KAP164 MVY → HYA Jul 25, 14:45 UTCJul 25, 16:05 UTC1h 20m
2026-07-25 KAP164 MVY → HYA Jul 25, 12:45 UTCJul 25, 13:15 UTC30m
2026-07-25 KAP52 - Jul 25, 11:15 UTCJul 25, 12:00 UTC45m
2026-07-24 KAP164 MVY → HYA Jul 24, 21:35 UTCJul 24, 22:20 UTC45m
2026-07-24 KAP164 MVY → HYA Jul 24, 19:55 UTCJul 24, 20:25 UTC30m
2026-07-24 KAP164 MVY → HYA Jul 24, 18:10 UTCJul 24, 18:35 UTC25m
2026-07-24 KAP164 MVY → HYA Jul 24, 11:20 UTCJul 24, 12:10 UTC50m
2026-07-23 KAP164 MVY → HYA Jul 23, 22:10 UTCJul 23, 22:55 UTC45m
2026-07-23 KAP164 MVY → HYA Jul 23, 20:50 UTCJul 23, 21:10 UTC20m
2026-07-23 KAP164 MVY → HYA Jul 23, 16:40 UTCJul 23, 17:40 UTC1h 0m
2026-07-23 KAP5021 - Jul 23, 15:15 UTCJul 23, 15:55 UTC40m
2026-07-23 KAP164 MVY → HYA Jul 23, 13:10 UTCJul 23, 13:40 UTC30m
2026-07-23 KAP52 - Jul 23, 11:20 UTCJul 23, 12:10 UTC50m
2026-07-23 KAP626 BOS → RUT Jul 23, 00:00 UTCJul 23, 01:10 UTC1h 10m
2026-07-22 KAP70 - Jul 22, 18:35 UTCJul 22, 19:30 UTC55m
2026-07-22 KAP626 BOS → RUT Jul 22, 15:05 UTCJul 22, 16:15 UTC1h 10m
2026-07-22 KAP60 - Jul 22, 13:20 UTCJul 22, 14:10 UTC50m
2026-07-21 KAP626 BOS → RUT Jul 21, 15:25 UTCJul 21, 16:30 UTC1h 5m
2026-07-21 KAP60 - Jul 21, 13:20 UTCJul 21, 14:15 UTC55m
2026-07-20 KAP501 - Jul 20, 22:50 UTCJul 20, 23:30 UTC40m
2026-07-20 KAP70 RUT → BOS Jul 20, 20:20 UTCJul 20, 21:05 UTC45m
2026-07-19 KAP164 - Jul 19, 21:00 UTCJul 19, 21:45 UTC45m
2026-07-19 KAP164 - Jul 19, 19:20 UTCJul 19, 20:10 UTC50m
2026-07-19 KAP626 BOS → RUT Jul 19, 15:05 UTCJul 19, 16:05 UTC1h 0m
2026-07-19 KAP52 - Jul 19, 12:20 UTCJul 19, 13:05 UTC45m
2026-07-19 KAP164 - Jul 19, 10:20 UTCJul 19, 11:35 UTC1h 15m
2026-07-18 KAP164 - Jul 18, 16:10 UTCJul 18, 16:45 UTC35m
2026-07-18 KAP52 - Jul 18, 11:15 UTCJul 18, 11:55 UTC40m
2026-07-17 KAP164 - Jul 17, 21:20 UTCJul 17, 22:05 UTC45m
2026-07-17 KAP164 - Jul 17, 19:55 UTCJul 17, 20:29 UTC35m
2026-07-17 KAP164 - Jul 17, 18:25 UTCJul 17, 19:00 UTC35m
2026-07-17 KAP164 - Jul 17, 17:09 UTCJul 17, 17:30 UTC20m
2026-07-17 KAP164 - Jul 17, 13:25 UTCJul 17, 13:45 UTC20m
2026-07-17 KAP52 - Jul 17, 12:00 UTCJul 17, 12:45 UTC45m
2026-07-16 KAP164 - Jul 16, 21:45 UTCJul 16, 22:45 UTC1h 0m
2026-07-16 KAP164 - Jul 16, 17:00 UTCJul 16, 18:05 UTC1h 5m
2026-07-16 KAP164 - Jul 16, 14:45 UTCJul 16, 15:35 UTC50m
2026-07-16 KAP52 - Jul 16, 11:15 UTCJul 16, 12:05 UTC50m
2026-07-15 KAP480 - Jul 15, 23:30 UTCJul 16, 00:20 UTC50m
2026-07-15 KAP70 - Jul 15, 18:20 UTCJul 15, 19:10 UTC50m
2026-07-15 KAP480 - Jul 15, 14:55 UTCJul 15, 16:15 UTC1h 20m

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 N244CA page for operator, model, and routing details .

Mode-S A23F0E frequently asked

What is Mode-S code A23F0E?
A23F0E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N244CA.
Where is Mode-S A23F0E registered?
Mode-S code A23F0E 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 A23F0E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A23F0E, octal 50437416, decimal 10,632,974.
What flights does A23F0E operate?
Mode-S A23F0E has broadcast 20 distinct callsigns, including KAP164, KAP734, KAP480, KAP155, KAP52.