Apparatus

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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 5h ago
Flights observed
117
Distinct callsigns
20
Country
US
Last broadcast
5h ago

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
KAP155 Cape Air 16 2026-05-30
KAP734 Cape Air 14 2026-06-01
KAP219 Cape Air 7 2026-04-14
KAP388 Cape Air 5 2026-04-23
KAP1016 Cape Air 5 2026-04-28
KAP5483 - 4 2026-04-16
KAPT94 - 3 2026-05-29
KAP777 Cape Air 3 2026-05-27
KAP212 Cape Air 3 2026-04-30
KAP1838 Cape Air 3 2026-04-29
KAP1833 Cape Air 3 2026-04-30
KAP1226 - 3 2026-05-15
KAPT787 - 2 2026-06-02
KAPT240 - 2 2026-04-28
KAP926 Cape Air 2 2026-05-04
KAP922 Cape Air 2 2026-05-27
KAP758 Cape Air 2 2026-05-20
KAP7101 Cape Air 2 2026-04-23
KAP5050 Cape Air 2 2026-05-16
KAP5001 Cape Air 2 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 KAPT787 - Jun 2, 18:40 UTCJun 2, 19:30 UTC50m
2026-06-02 KAPT787 - Jun 2, 15:45 UTCJun 2, 17:25 UTC1h 40m
2026-06-02 KAPT4 - Jun 2, 12:25 UTCJun 2, 13:40 UTC1h 15m
2026-06-01 KAP734 BOS → HYA Jun 1, 17:25 UTCJun 1, 17:55 UTC30m
2026-05-30 KAP155 BOS → BHB May 30, 15:30 UTCMay 30, 16:00 UTC30m
2026-05-30 KAP155 BOS → BHB May 30, 13:15 UTCMay 30, 13:55 UTC40m
2026-05-30 KAP5001 ACK → BOS May 30, 11:35 UTCMay 30, 12:10 UTC35m
2026-05-30 KAP155 BOS → BHB May 30, 10:45 UTCMay 30, 11:00 UTC15m
2026-05-29 KAPT94 - May 29, 18:05 UTCMay 29, 19:10 UTC1h 5m
2026-05-29 KAPT94 - May 29, 14:25 UTCMay 29, 15:20 UTC55m
2026-05-29 KAPT94 - May 29, 12:20 UTCMay 29, 13:35 UTC1h 15m
2026-05-27 KAP6180 - May 27, 20:40 UTCMay 27, 21:05 UTC25m
2026-05-27 KAP922 BOS → RKD May 27, 19:35 UTCMay 27, 20:10 UTC35m
2026-05-27 KAP922 BOS → RKD May 27, 17:25 UTCMay 27, 17:50 UTC25m
2026-05-27 KAP777 BHB → BOS May 27, 15:00 UTCMay 27, 16:00 UTC1h 0m
2026-05-22 KAP777 BHB → BOS May 22, 19:00 UTCMay 22, 19:55 UTC55m
2026-05-22 KAP214 ISP → BOS May 22, 16:35 UTCMay 22, 17:40 UTC1h 5m
2026-05-22 KAP777 BHB → BOS May 22, 13:40 UTCMay 22, 14:40 UTC1h 0m
2026-05-22 KAP801 BIL → HVR May 22, 10:15 UTCMay 22, 12:30 UTC2h 15m
2026-05-21 KAP734 BOS → HYA May 21, 18:20 UTCMay 21, 19:20 UTC1h 0m
2026-05-21 KAP6136 - May 21, 16:55 UTCMay 21, 17:30 UTC35m
2026-05-21 KAP734 BOS → HYA May 21, 14:55 UTCMay 21, 15:25 UTC30m
2026-05-21 KAP5041 ACK → BOS May 21, 13:25 UTCMay 21, 14:00 UTC35m
2026-05-21 KAP734 BOS → HYA May 21, 11:30 UTCMay 21, 12:00 UTC30m
2026-05-21 KAP6132 HYA → BOS May 21, 10:10 UTCMay 21, 10:35 UTC25m
2026-05-20 KAP758 BOS → RKD May 20, 17:35 UTCMay 20, 17:45 UTC10m
2026-05-19 KAP758 BOS → RKD May 19, 18:30 UTCMay 19, 19:05 UTC35m
2026-05-19 KAP1850 RKD → BOS May 19, 12:05 UTCMay 19, 13:10 UTC1h 5m
2026-05-17 KAP235 BOS → AUG May 17, 22:50 UTCMay 17, 23:15 UTC25m
2026-05-17 KAP1850 RKD → BOS May 17, 12:15 UTCMay 17, 12:55 UTC40m
2026-05-16 KAP5050 BOS → RKD May 16, 22:05 UTCMay 16, 22:55 UTC50m
2026-05-16 KAP1856 RKD → BOS May 16, 20:10 UTCMay 16, 21:15 UTC1h 5m
2026-05-16 KAP5050 BOS → RKD May 16, 17:50 UTCMay 16, 18:55 UTC1h 5m
2026-05-16 KAP5181 ACK → BOS May 16, 15:25 UTCMay 16, 16:15 UTC50m
2026-05-16 KAP155 BOS → BHB May 16, 12:35 UTCMay 16, 13:05 UTC30m
2026-05-16 KAP5001 ACK → BOS May 16, 11:05 UTCMay 16, 11:51 UTC45m
2026-05-16 KAP155 BOS → BHB May 16, 10:01 UTCMay 16, 10:11 UTC10m
2026-05-15 KAP1226 - May 15, 21:00 UTCMay 15, 22:00 UTC1h 0m
2026-05-15 KAP5062 - May 15, 19:35 UTCMay 15, 20:15 UTC40m
2026-05-15 KAP1226 - May 15, 15:15 UTCMay 15, 15:45 UTC30m
2026-05-15 KAP5042 - May 15, 13:50 UTCMay 15, 14:25 UTC35m
2026-05-15 KAP1226 - May 15, 12:40 UTCMay 15, 12:55 UTC15m
2026-05-14 KAP734 BOS → HYA May 14, 22:20 UTCMay 14, 22:40 UTC20m
2026-05-14 KAP734 BOS → HYA May 14, 20:00 UTCMay 14, 21:00 UTC1h 0m
2026-05-13 KAP1333 BOS → BHB May 13, 18:10 UTCMay 13, 18:35 UTC25m
2026-05-13 KAP1505 EWB → HYA May 13, 16:35 UTCMay 13, 17:10 UTC35m
2026-05-09 KAP155 BOS → BHB May 9, 17:20 UTCMay 9, 18:35 UTC1h 15m
2026-05-09 KAP155 BOS → BHB May 9, 15:25 UTCMay 9, 16:10 UTC45m
2026-05-09 KAP155 BOS → BHB May 9, 12:35 UTCMay 9, 13:10 UTC35m
2026-05-09 KAP155 BOS → BHB May 9, 11:10 UTCMay 9, 11:50 UTC40m

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 5h ago.
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 KAP155, KAP734, KAP219, KAP388, KAP1016.