Apparatus

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sensors Mode-S transponder

A2957A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N266CA · TECNAM P-2012 Traveller · operated by HYANNIS AIR SERVICE INC

Hex
A2957A
Octal
50512572
Decimal
10,655,098
Country
US
Tail
N266CA
Type
P212
No current signal · last broadcast 1d ago
Flights observed
86
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A2957A.

Country allocation

The ICAO 24-bit address A2957A 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
KAP922 Cape Air 15 2026-05-04
KAP777 Cape Air 6 2026-05-26
KAP1838 Cape Air 5 2026-06-01
KAP18 Cape Air 5 2026-05-06
KAP734 Cape Air 4 2026-05-17
KAP1333 Cape Air 4 2026-05-15
KAP1226 Cape Air 4 2026-05-29
KAP1006 Cape Air 4 2026-05-14
KAPT978 - 3 2026-05-18
KAPT9 - 3 2026-05-10
KAPT77 - 3 2026-05-19
KAPT388 - 3 2026-05-07
KAP212 Cape Air 3 2026-06-01
KAP418 Cape Air 2 2026-05-24
KAP1833 Cape Air 2 2026-06-01
KAPT787 - 1 2026-05-11
KAPT605 - 1 2026-04-28
KAPT241 - 1 2026-04-27
KAPT100 - 1 2026-04-27
KAP926 Cape Air 1 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 KAP217 BOS → ISP Jun 1, 21:45 UTCJun 1, 22:50 UTC1h 5m
2026-06-01 KAP1838 BHB → BOS Jun 1, 18:35 UTCJun 1, 19:45 UTC1h 10m
2026-06-01 KAP1833 BOS → BHB Jun 1, 16:10 UTCJun 1, 17:20 UTC1h 10m
2026-06-01 KAP212 BHB → BOS Jun 1, 14:20 UTCJun 1, 15:20 UTC1h 0m
2026-05-29 KAP1226 BOS → ACK May 29, 17:55 UTCMay 29, 19:10 UTC1h 15m
2026-05-28 KAP1226 BOS → ACK May 28, 19:50 UTCMay 28, 21:00 UTC1h 10m
2026-05-28 KAP5081 ACK → BOS May 28, 18:10 UTCMay 28, 18:55 UTC45m
2026-05-28 KAP1226 BOS → ACK May 28, 16:20 UTCMay 28, 16:50 UTC30m
2026-05-28 KAP6152 ACK → BOS May 28, 14:45 UTCMay 28, 15:20 UTC35m
2026-05-28 KAP1226 BOS → ACK May 28, 13:10 UTCMay 28, 13:40 UTC30m
2026-05-28 KAP6150 HYA → BOS May 28, 11:20 UTCMay 28, 11:50 UTC30m
2026-05-26 KAP801 BIL → HVR May 26, 23:25 UTCMay 26, 23:49 UTC25m
2026-05-26 KAP1838 BHB → BOS May 26, 18:30 UTCMay 26, 20:00 UTC1h 30m
2026-05-26 KAP777 BHB → BOS May 26, 16:00 UTCMay 26, 17:09 UTC1h 10m
2026-05-26 KAP777 BHB → BOS May 26, 14:14 UTCMay 26, 15:09 UTC55m
2026-05-25 KAP777 BHB → BOS May 25, 22:05 UTCMay 25, 23:04 UTC1h 0m
2026-05-25 KAP1838 BHB → BOS May 25, 18:40 UTCMay 25, 19:54 UTC1h 14m
2026-05-25 KAP777 BHB → BOS May 25, 16:15 UTCMay 25, 17:20 UTC1h 5m
2026-05-25 KAP777 BHB → BOS May 25, 14:10 UTCMay 25, 15:05 UTC55m
2026-05-24 KAP418 BOS → BHB May 24, 23:00 UTCMay 24, 23:40 UTC40m
2026-05-24 KAP1838 BHB → BOS May 24, 18:45 UTCMay 24, 20:10 UTC1h 25m
2026-05-24 KAP1833 BOS → BHB May 24, 16:05 UTCMay 24, 17:10 UTC1h 5m
2026-05-24 KAP212 BHB → BOS May 24, 14:15 UTCMay 24, 15:10 UTC55m
2026-05-23 KAP32 BOS → LEB May 23, 21:15 UTCMay 23, 22:20 UTC1h 5m
2026-05-23 KAP1838 BHB → BOS May 23, 18:40 UTCMay 23, 20:00 UTC1h 20m
2026-05-23 KAP418 BOS → BHB May 23, 16:05 UTCMay 23, 17:20 UTC1h 15m
2026-05-23 KAP212 BHB → BOS May 23, 14:10 UTCMay 23, 15:15 UTC1h 5m
2026-05-20 KAP777 BHB → BOS May 20, 19:00 UTCMay 20, 20:10 UTC1h 10m
2026-05-19 KAP926 BOS → PVC May 19, 19:25 UTCMay 19, 20:10 UTC45m
2026-05-19 KAPT77 - May 19, 16:15 UTCMay 19, 17:45 UTC1h 30m
2026-05-18 KAPT77 - May 18, 14:40 UTCMay 18, 15:10 UTC30m
2026-05-18 KAPT978 - May 18, 11:50 UTCMay 18, 13:50 UTC2h 0m
2026-05-17 KAP734 BOS → HYA May 17, 23:20 UTCMay 18, 00:25 UTC1h 5m
2026-05-17 KAP5222 ACK → BOS May 17, 21:40 UTCMay 17, 22:15 UTC35m
2026-05-17 KAP734 BOS → HYA May 17, 19:30 UTCMay 17, 20:05 UTC35m
2026-05-17 KAP1002 AUG → BOS May 17, 17:35 UTCMay 17, 18:15 UTC40m
2026-05-17 KAP5050 BOS → RKD May 17, 16:01 UTCMay 17, 16:30 UTC30m
2026-05-17 KAP5101 ACK → BOS May 17, 14:25 UTCMay 17, 15:01 UTC35m
2026-05-16 KAP734 BOS → HYA May 16, 15:05 UTCMay 16, 15:31 UTC25m
2026-05-15 KAP1333 BOS → BHB May 15, 15:00 UTCMay 15, 15:25 UTC25m
2026-05-15 KAP1333 BOS → BHB May 15, 12:20 UTCMay 15, 13:00 UTC40m
2026-05-14 KAP1333 BOS → BHB May 14, 21:55 UTCMay 14, 22:35 UTC40m
2026-05-14 KAP1006 AUG → BOS May 14, 20:05 UTCMay 14, 21:00 UTC55m
2026-05-14 KAP1333 BOS → BHB May 14, 17:50 UTCMay 14, 18:25 UTC35m
2026-05-14 KAP5041 ACK → BOS May 14, 13:35 UTCMay 14, 14:10 UTC35m
2026-05-14 KAP734 BOS → HYA May 14, 12:40 UTCMay 14, 12:50 UTC10m
2026-05-13 KAPT978 - May 13, 15:30 UTCMay 13, 17:30 UTC2h 0m
2026-05-11 KAPT787 - May 11, 13:50 UTCMay 11, 16:10 UTC2h 20m
2026-05-10 KAPT9 - May 10, 19:09 UTCMay 10, 20:45 UTC1h 35m
2026-05-10 KAPT9 - May 10, 16:25 UTCMay 10, 17:59 UTC1h 35m

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 N266CA page for operator, model, and routing details .

Mode-S A2957A frequently asked

What is Mode-S code A2957A?
A2957A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N266CA.
Where is Mode-S A2957A registered?
Mode-S code A2957A 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 A2957A broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2957A, octal 50512572, decimal 10,655,098.
What flights does A2957A operate?
Mode-S A2957A has broadcast 20 distinct callsigns, including KAP922, KAP777, KAP1838, KAP18, KAP734.