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 9h ago
Flights observed
211
Distinct callsigns
20
Country
US
Last broadcast
9h 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
KAP2112 - 19 2026-06-18
KAP777 - 18 2026-06-28
KAP734 - 16 2026-07-10
KAP922 Cape Air 15 2026-05-04
KAP1333 - 12 2026-06-22
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
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
KAPT77 - 3 2026-05-19
KAPT388 - 3 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-10 KAP240 BOS → HYA Jul 10, 11:30 UTCJul 10, 11:40 UTC10m
2026-07-10 KAP734 - Jul 10, 01:50 UTCJul 10, 02:05 UTC15m
2026-07-09 KAP734 - Jul 9, 23:50 UTCJul 10, 00:20 UTC30m
2026-07-09 KAP734 - Jul 9, 22:35 UTCJul 9, 23:10 UTC35m
2026-07-09 KAP734 - Jul 9, 21:05 UTCJul 9, 21:15 UTC10m
2026-07-09 KAPT240 - Jul 9, 18:15 UTCJul 9, 19:20 UTC1h 5m
2026-07-09 KAPT91 - Jul 9, 13:35 UTCJul 9, 15:30 UTC1h 55m
2026-07-08 KAPT321 - Jul 8, 19:35 UTCJul 8, 21:10 UTC1h 35m
2026-07-08 KAPT920 - Jul 8, 13:45 UTCJul 8, 15:45 UTC2h 0m
2026-07-08 KAPT920 - Jul 8, 12:25 UTCJul 8, 12:55 UTC30m
2026-07-06 KAP734 - Jul 6, 23:10 UTCJul 6, 23:20 UTC10m
2026-07-06 KAP734 - Jul 6, 21:00 UTCJul 6, 21:45 UTC45m
2026-07-06 KAP5321 - Jul 6, 19:50 UTCJul 6, 20:20 UTC30m
2026-07-06 KAP402 - Jul 6, 18:20 UTCJul 6, 18:55 UTC35m
2026-07-05 KAP1858 - Jul 5, 19:30 UTCJul 5, 20:35 UTC1h 5m
2026-07-05 KAP82 - Jul 5, 17:05 UTCJul 5, 18:05 UTC1h 0m
2026-07-05 KAP54 - Jul 5, 15:40 UTCJul 5, 16:20 UTC40m
2026-07-05 KAP54 - Jul 5, 13:10 UTCJul 5, 13:40 UTC30m
2026-07-05 KAP54 - Jul 5, 11:45 UTCJul 5, 12:30 UTC45m
2026-07-04 KAP54 - Jul 4, 20:30 UTCJul 4, 21:05 UTC35m
2026-07-04 KAP54 - Jul 4, 15:50 UTCJul 4, 16:25 UTC35m
2026-07-04 KAP54 - Jul 4, 13:45 UTCJul 4, 14:20 UTC35m
2026-07-04 KAP54 - Jul 4, 11:45 UTCJul 4, 12:15 UTC30m
2026-07-03 KAP388 - Jul 3, 16:20 UTCJul 3, 17:15 UTC55m
2026-07-02 KAP5050 - Jul 2, 18:20 UTCJul 2, 18:50 UTC30m
2026-07-02 KAP5121 ACK → BOS Jul 2, 16:50 UTCJul 2, 17:20 UTC30m
2026-07-02 KAP5050 - Jul 2, 13:05 UTCJul 2, 13:35 UTC30m
2026-07-02 KAP1850 - Jul 2, 11:10 UTCJul 2, 12:10 UTC1h 0m
2026-07-01 KAP5050 - Jul 1, 21:40 UTCJul 1, 22:45 UTC1h 5m
2026-07-01 KAP3121 - Jul 1, 20:10 UTCJul 1, 20:40 UTC30m
2026-07-01 KAP5050 - Jul 1, 18:25 UTCJul 1, 18:50 UTC25m
2026-06-30 KAP2141 PVC → BOS Jun 30, 17:45 UTCJun 30, 18:05 UTC20m
2026-06-30 KAP418 BOS → PVC Jun 30, 16:40 UTCJun 30, 17:00 UTC20m
2026-06-30 KAP216 ISP → BOS Jun 30, 14:15 UTCJun 30, 15:15 UTC1h 0m
2026-06-28 KAP777 - Jun 28, 21:55 UTCJun 28, 22:55 UTC1h 0m
2026-06-28 KAP214 ISP → BOS Jun 28, 19:59 UTCJun 28, 21:10 UTC1h 10m
2026-06-28 KAP777 BOS → ISP Jun 28, 14:39 UTCJun 28, 15:44 UTC1h 5m

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 9h 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 KAP2112, KAP777, KAP734, KAP922, KAP1333.