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 Jul 26, 22:05 UTC
Flights observed
248
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:05 UTC

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
KAP734 Cape Air 31 2026-07-26
KAP2112 - 19 2026-06-18
KAP777 - 18 2026-06-28
KAP922 Cape Air 16 2026-07-26
KAP1333 - 12 2026-06-22
KAP729 Cape Air 7 2026-07-18
KAP54 - 7 2026-07-05
KAP1838 Cape Air 7 2026-06-04
KAP86 Cape Air 5 2026-06-14
KAP5050 - 5 2026-07-02
KAP240 Cape Air 5 2026-07-10
KAP212 Cape Air 5 2026-06-25
KAP1874 - 5 2026-06-16
KAP18 Cape Air 5 2026-05-06
KAP626 Cape Air 4 2026-07-24
KAP1880 Cape Air 4 2026-06-16
KAP1226 Cape Air 4 2026-05-29
KAP1006 Cape Air 4 2026-05-14
KAPT978 - 3 2026-05-18
KAPT9 - 3 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KAP922 BOS → RKD Jul 26, 21:10 UTCJul 26, 22:05 UTC55m
2026-07-26 KAP3161 MVY → BOS Jul 26, 17:10 UTCJul 26, 17:35 UTC25m
2026-07-26 KAP734 BOS → HYA Jul 26, 15:55 UTCJul 26, 16:25 UTC30m
2026-07-26 KAP3262 MVY → BOS Jul 26, 14:10 UTCJul 26, 14:45 UTC35m
2026-07-26 KAP734 BOS → HYA Jul 26, 12:45 UTCJul 26, 12:55 UTC10m
2026-07-25 KAP734 BOS → HYA Jul 25, 19:55 UTCJul 25, 20:20 UTC25m
2026-07-24 KAP626 BOS → RUT Jul 24, 18:35 UTCJul 24, 19:30 UTC55m
2026-07-24 KAP626 BOS → RUT Jul 24, 15:00 UTCJul 24, 15:45 UTC45m
2026-07-24 KAP626 BOS → RUT Jul 24, 13:20 UTCJul 24, 14:10 UTC50m
2026-07-23 KAP626 BOS → RUT Jul 23, 23:45 UTCJul 24, 01:10 UTC1h 25m
2026-07-22 KAP6177 HYA → BOS Jul 22, 14:00 UTCJul 22, 14:30 UTC30m
2026-07-22 KAP210 CTO → BOS Jul 22, 11:10 UTCJul 22, 12:55 UTC1h 45m
2026-07-21 KAP734 BOS → HYA Jul 21, 22:45 UTCJul 21, 23:05 UTC20m
2026-07-21 KAP734 BOS → HYA Jul 21, 19:45 UTCJul 21, 20:20 UTC35m
2026-07-21 KAP6110 - Jul 21, 18:30 UTCJul 21, 19:40 UTC1h 10m
2026-07-21 KAP734 BOS → HYA Jul 21, 16:35 UTCJul 21, 17:05 UTC30m
2026-07-21 KAP734 BOS → HYA Jul 21, 15:35 UTCJul 21, 16:00 UTC25m
2026-07-21 KAP734 BOS → HYA Jul 21, 13:55 UTCJul 21, 14:30 UTC35m
2026-07-21 KAP5041 ACK → BOS Jul 21, 12:15 UTCJul 21, 12:55 UTC40m
2026-07-20 KAP734 BOS → HYA Jul 20, 19:10 UTCJul 20, 19:45 UTC35m
2026-07-20 KAP5321 ACK → BOS Jul 20, 17:35 UTCJul 20, 18:10 UTC35m
2026-07-20 KAP734 BOS → HYA Jul 20, 16:30 UTCJul 20, 16:55 UTC25m
2026-07-20 KAP734 BOS → HYA Jul 20, 15:40 UTCJul 20, 16:00 UTC20m
2026-07-20 KAP734 BOS → HYA Jul 20, 13:45 UTCJul 20, 14:15 UTC30m
2026-07-20 KAP5042 ACK → BOS Jul 20, 12:15 UTCJul 20, 12:55 UTC40m
2026-07-19 KAP734 BOS → HYA Jul 19, 21:10 UTCJul 19, 21:35 UTC25m
2026-07-19 KAP3041 MVY → BOS Jul 19, 19:35 UTCJul 19, 20:05 UTC30m
2026-07-19 KAP734 BOS → HYA Jul 19, 18:20 UTCJul 19, 18:45 UTC25m
2026-07-19 KAP3161 - Jul 19, 17:05 UTCJul 19, 17:35 UTC30m
2026-07-19 KAP734 BOS → HYA Jul 19, 15:35 UTCJul 19, 15:50 UTC15m
2026-07-18 KAP729 ORD → BRL Jul 18, 18:55 UTCJul 18, 19:20 UTC25m
2026-07-18 KAP729 ORD → BRL Jul 18, 17:20 UTCJul 18, 18:05 UTC45m
2026-07-18 KAP729 ORD → BRL Jul 18, 15:45 UTCJul 18, 16:20 UTC35m
2026-07-18 KAP729 ORD → BRL Jul 18, 14:20 UTCJul 18, 14:55 UTC35m
2026-07-18 KAP729 ORD → BRL Jul 18, 12:45 UTCJul 18, 13:15 UTC30m
2026-07-18 KAP729 ORD → BRL Jul 18, 11:10 UTCJul 18, 11:45 UTC35m
2026-07-18 KAP729 ORD → BRL Jul 18, 10:05 UTCJul 18, 10:15 UTC10m
2026-07-17 KAP7031 - Jul 17, 19:30 UTCJul 17, 19:55 UTC25m
2026-07-17 KAP5321 - Jul 17, 17:44 UTCJul 17, 18:15 UTC30m
2026-07-17 KAP5091 - Jul 17, 16:10 UTCJul 17, 16:34 UTC25m
2026-07-17 KAP5301 ACK → BOS Jul 17, 14:35 UTCJul 17, 15:10 UTC35m
2026-07-17 KAP5011 BOS → ACK Jul 17, 13:20 UTCJul 17, 13:45 UTC25m
2026-07-17 KAP5001 - Jul 17, 11:45 UTCJul 17, 12:15 UTC30m
2026-07-17 KAP7511 HYA → ACK Jul 17, 10:44 UTCJul 17, 10:55 UTC10m
2026-07-15 KAP1638 - Jul 15, 17:00 UTCJul 15, 17:10 UTC10m
2026-07-13 KAP6268 - Jul 13, 09:50 UTCJul 13, 10:00 UTC10m
2026-07-10 KAP240 - Jul 10, 20:45 UTCJul 10, 22:05 UTC1h 20m
2026-07-10 KAP240 - Jul 10, 18:10 UTCJul 10, 19:45 UTC1h 35m
2026-07-10 KAP240 BOS → HYA Jul 10, 14:10 UTCJul 10, 14:45 UTC35m
2026-07-10 KAP240 BOS → HYA Jul 10, 12:30 UTCJul 10, 13:05 UTC35m

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 Jul 26, 22:05 UTC.
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 KAP734, KAP2112, KAP777, KAP922, KAP1333.