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sensors Mode-S transponder

A909B8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N6813J · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC DBA, CAPE AIR, NANTUCKET AIRLINES

Hex
A909B8
Octal
52204670
Decimal
11,078,072
Country
US
Tail
N6813J
Type
C402
No current signal · last broadcast 12h ago
Flights observed
280
Distinct callsigns
20
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S A909B8.

Country allocation

The ICAO 24-bit address A909B8 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
KAP916 - 30 2026-07-13
KAP717 Cape Air 17 2026-05-12
KAP78 - 14 2026-07-05
KAP155 Cape Air 11 2026-06-12
KAP519 - 10 2026-07-10
KAP85 - 9 2026-07-10
KAP876 - 8 2026-06-27
KAP747 Cape Air 8 2026-05-21
KAP811 Cape Air 7 2026-05-04
KAP902 - 6 2026-07-07
KAP787 - 6 2026-07-03
KAP321 Cape Air 6 2026-05-24
KAP3064 Cape Air 6 2026-06-04
KAP109 Cape Air 6 2026-04-28
KAP87 - 5 2026-07-11
KAP7 - 5 2026-07-06
KAP418 Cape Air 5 2026-06-08
KAP412 Cape Air 5 2026-05-06
KAP296 - 5 2026-07-12
KAPT58 - 4 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAP1854 - Jul 13, 16:45 UTCJul 13, 17:45 UTC1h 0m
2026-07-13 KAP388 BOS → RKD Jul 13, 14:55 UTCJul 13, 15:50 UTC55m
2026-07-13 KAP916 - Jul 13, 12:55 UTCJul 13, 13:50 UTC55m
2026-07-13 KAP916 - Jul 13, 11:00 UTCJul 13, 12:00 UTC1h 0m
2026-07-12 KAP296 - Jul 12, 17:50 UTCJul 12, 18:10 UTC20m
2026-07-12 KAP296 - Jul 12, 15:50 UTCJul 12, 17:10 UTC1h 20m
2026-07-12 KAP3262 - Jul 12, 14:20 UTCJul 12, 14:50 UTC30m
2026-07-12 KAP296 - Jul 12, 12:25 UTCJul 12, 12:50 UTC25m
2026-07-12 KAP3201 - Jul 12, 11:05 UTCJul 12, 11:30 UTC25m
2026-07-12 KAP296 HYA → MVY Jul 12, 10:20 UTCJul 12, 10:30 UTC10m
2026-07-11 KAP87 - Jul 11, 21:25 UTCJul 11, 21:45 UTC20m
2026-07-11 KAP1876 LEB → BOS Jul 11, 19:25 UTCJul 11, 20:10 UTC45m
2026-07-11 KAP87 - Jul 11, 16:40 UTCJul 11, 17:25 UTC45m
2026-07-11 KAP7101 - Jul 11, 15:25 UTCJul 11, 16:00 UTC35m
2026-07-11 KAP87 - Jul 11, 12:30 UTCJul 11, 12:50 UTC20m
2026-07-11 KAP7041 - Jul 11, 11:10 UTCJul 11, 11:30 UTC20m
2026-07-10 KAP7031 - Jul 10, 19:05 UTCJul 10, 19:30 UTC25m
2026-07-10 KAP5321 - Jul 10, 17:40 UTCJul 10, 18:15 UTC35m
2026-07-10 KAP5091 - Jul 10, 16:10 UTCJul 10, 16:45 UTC35m
2026-07-10 KAP85 - Jul 10, 15:00 UTCJul 10, 15:35 UTC35m
2026-07-10 KAP85 - Jul 10, 13:40 UTCJul 10, 14:15 UTC35m
2026-07-10 KAP85 - Jul 10, 11:25 UTCJul 10, 12:05 UTC40m
2026-07-10 KAP85 - Jul 10, 10:20 UTCJul 10, 10:30 UTC10m
2026-07-10 KAP519 - Jul 10, 01:55 UTCJul 10, 02:55 UTC1h 0m
2026-07-10 KAP6104 - Jul 10, 00:35 UTCJul 10, 01:10 UTC35m
2026-07-09 KAP519 - Jul 9, 22:50 UTCJul 9, 23:20 UTC30m
2026-07-09 KAP519 - Jul 9, 21:05 UTCJul 9, 21:50 UTC45m
2026-07-09 KAP519 - Jul 9, 19:35 UTCJul 9, 20:10 UTC35m
2026-07-09 KAP519 - Jul 9, 18:20 UTCJul 9, 19:00 UTC40m
2026-07-09 KAPT240 - Jul 9, 13:30 UTCJul 9, 14:35 UTC1h 5m
2026-07-09 KAPT240 - Jul 9, 12:25 UTCJul 9, 12:45 UTC20m
2026-07-08 KAPT240 - Jul 8, 16:55 UTCJul 8, 18:10 UTC1h 15m
2026-07-07 KAP902 - Jul 7, 16:10 UTCJul 7, 16:35 UTC25m
2026-07-06 KAP1880 - Jul 6, 20:05 UTCJul 6, 20:50 UTC45m
2026-07-06 KAP902 - Jul 6, 18:15 UTCJul 6, 18:50 UTC35m
2026-07-06 KAP7 - Jul 6, 15:20 UTCJul 6, 16:30 UTC1h 10m
2026-07-06 KAP7 - Jul 6, 13:20 UTCJul 6, 13:30 UTC10m
2026-07-06 KAP7 - Jul 6, 11:50 UTCJul 6, 12:10 UTC20m
2026-07-05 KAP78 - Jul 5, 22:15 UTCJul 5, 22:45 UTC30m
2026-07-05 KAP78 - Jul 5, 21:00 UTCJul 5, 21:30 UTC30m
2026-07-05 KAP314 - Jul 5, 19:40 UTCJul 5, 20:15 UTC35m
2026-07-05 KAP314 - Jul 5, 17:20 UTCJul 5, 17:50 UTC30m
2026-07-05 KAP78 - Jul 5, 16:10 UTCJul 5, 16:35 UTC25m
2026-07-05 KAP78 - Jul 5, 01:15 UTCJul 5, 02:15 UTC1h 0m
2026-07-04 KAP78 - Jul 4, 23:40 UTCJul 5, 00:15 UTC35m
2026-07-04 KAP78 - Jul 4, 22:05 UTCJul 4, 22:35 UTC30m
2026-07-04 KAP7161 HYA → BOS Jul 4, 18:05 UTCJul 4, 18:30 UTC25m
2026-07-03 KAP787 - Jul 3, 23:15 UTCJul 3, 23:30 UTC15m
2026-07-03 KAP787 - Jul 3, 22:10 UTCJul 3, 22:20 UTC10m
2026-07-03 KAP787 - Jul 3, 20:40 UTCJul 3, 21:40 UTC1h 0m

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 N6813J page for operator, model, and routing details .

Mode-S A909B8 frequently asked

What is Mode-S code A909B8?
A909B8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N6813J.
Where is Mode-S A909B8 registered?
Mode-S code A909B8 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 A909B8 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A909B8, octal 52204670, decimal 11,078,072.
What flights does A909B8 operate?
Mode-S A909B8 has broadcast 20 distinct callsigns, including KAP916, KAP717, KAP78, KAP155, KAP519.