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sensors Mode-S transponder

A91209

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N68391 · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC DBA, CAPE AIR

Hex
A91209
Octal
52211011
Decimal
11,080,201
Country
US
Tail
N68391
Type
C402
No current signal · last broadcast Jul 25, 18:50 UTC
Flights observed
282
Distinct callsigns
20
Country
US
Last broadcast
Jul 25, 18:50 UTC

Last known position

Most recent position reported by Mode-S A91209.

Country allocation

The ICAO 24-bit address A91209 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
KAP202 - 32 2026-06-26
KAP1903 - 32 2026-06-15
KAP333 Cape Air 23 2026-07-24
KAP157 - 22 2026-07-18
KAP11 Cape Air 19 2026-05-30
KAP510 Cape Air 15 2026-07-09
KAP211 Cape Air 15 2026-07-24
KAP47 Cape Air 11 2026-07-23
KAP131 - 11 2026-06-26
KAP222 Cape Air 10 2026-07-25
KAP65 Cape Air 8 2026-06-08
KAP2 Cape Air 8 2026-05-31
KAP64 Cape Air 7 2026-06-17
KAP2296 - 7 2026-07-25
KAP5150 Cape Air 6 2026-06-03
KAP514 - 6 2026-06-22
KAP107 Cape Air 6 2026-05-09
KAP635 Cape Air 5 2026-04-30
KAP63 Cape Air 5 2026-07-21
KAP70 - 4 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 KAP2296 - Jul 25, 18:35 UTCJul 25, 18:50 UTC15m
2026-07-25 KAP222 SJU → VQS Jul 25, 14:00 UTCJul 25, 14:20 UTC20m
2026-07-25 KAP222 SJU → VQS Jul 25, 11:20 UTCJul 25, 11:35 UTC15m
2026-07-24 KAP333 ACK → BOS Jul 24, 21:45 UTCJul 24, 22:00 UTC15m
2026-07-24 KAP333 ACK → BOS Jul 24, 19:20 UTCJul 24, 19:40 UTC20m
2026-07-24 KAP333 ACK → BOS Jul 24, 17:15 UTCJul 24, 18:05 UTC50m
2026-07-24 KAP211 BOS → ISP Jul 24, 15:55 UTCJul 24, 16:05 UTC10m
2026-07-24 KAP211 BOS → ISP Jul 24, 15:05 UTCJul 24, 15:15 UTC10m
2026-07-24 KAP333 ACK → BOS Jul 24, 13:30 UTCJul 24, 13:45 UTC15m
2026-07-24 KAP333 ACK → BOS Jul 24, 11:25 UTCJul 24, 11:40 UTC15m
2026-07-23 KAP333 ACK → BOS Jul 23, 22:05 UTCJul 23, 22:20 UTC15m
2026-07-23 KAP333 ACK → BOS Jul 23, 19:50 UTCJul 23, 20:10 UTC20m
2026-07-23 KAP47 STT → SJU Jul 23, 17:55 UTCJul 23, 18:05 UTC10m
2026-07-23 KAP333 ACK → BOS Jul 23, 15:00 UTCJul 23, 15:50 UTC50m
2026-07-23 KAP333 ACK → BOS Jul 23, 13:30 UTCJul 23, 13:50 UTC20m
2026-07-23 KAP333 ACK → BOS Jul 23, 11:25 UTCJul 23, 11:40 UTC15m
2026-07-22 KAP333 ACK → BOS Jul 22, 21:55 UTCJul 22, 22:05 UTC10m
2026-07-22 KAP333 ACK → BOS Jul 22, 19:35 UTCJul 22, 19:50 UTC15m
2026-07-22 KAP333 ACK → BOS Jul 22, 17:30 UTCJul 22, 17:45 UTC15m
2026-07-22 KAP333 ACK → BOS Jul 22, 16:40 UTCJul 22, 16:50 UTC10m
2026-07-22 KAP333 ACK → BOS Jul 22, 14:50 UTCJul 22, 15:45 UTC55m
2026-07-22 KAP333 ACK → BOS Jul 22, 13:40 UTCJul 22, 13:50 UTC10m
2026-07-22 KAP333 ACK → BOS Jul 22, 11:35 UTCJul 22, 11:45 UTC10m
2026-07-21 KAP63 BOS → RUT Jul 21, 20:20 UTCJul 21, 20:30 UTC10m
2026-07-21 KAP63 BOS → RUT Jul 21, 17:20 UTCJul 21, 18:00 UTC40m
2026-07-21 KAP63 BOS → RUT Jul 21, 15:50 UTCJul 21, 16:00 UTC10m
2026-07-20 KAP222 - Jul 20, 21:30 UTCJul 20, 21:50 UTC20m
2026-07-20 KAP222 - Jul 20, 19:00 UTCJul 20, 19:15 UTC15m
2026-07-20 KAP222 - Jul 20, 18:15 UTCJul 20, 18:25 UTC10m
2026-07-20 KAP222 - Jul 20, 14:40 UTCJul 20, 15:35 UTC55m
2026-07-20 KAP222 - Jul 20, 11:55 UTCJul 20, 12:15 UTC20m
2026-07-18 KAP157 - Jul 18, 17:15 UTCJul 18, 18:00 UTC45m
2026-07-18 KAP157 - Jul 18, 14:20 UTCJul 18, 14:30 UTC10m
2026-07-18 KAP157 - Jul 18, 12:45 UTCJul 18, 12:55 UTC10m
2026-07-18 KAP157 - Jul 18, 11:55 UTCJul 18, 12:05 UTC10m
2026-07-18 KAP157 - Jul 18, 10:50 UTCJul 18, 11:05 UTC15m
2026-07-17 KAP157 - Jul 17, 21:44 UTCJul 17, 22:25 UTC40m
2026-07-17 KAP157 - Jul 17, 20:29 UTCJul 17, 20:50 UTC20m
2026-07-11 KAP2296 - Jul 11, 17:00 UTCJul 11, 17:20 UTC20m
2026-07-11 KAP2296 - Jul 11, 15:50 UTCJul 11, 16:10 UTC20m
2026-07-10 KAP2296 - Jul 10, 18:20 UTCJul 10, 18:45 UTC25m
2026-07-10 KAP2296 - Jul 10, 17:25 UTCJul 10, 17:35 UTC10m
2026-07-10 KAP2296 - Jul 10, 16:05 UTCJul 10, 16:20 UTC15m
2026-07-10 KAP2296 - Jul 10, 14:50 UTCJul 10, 15:05 UTC15m
2026-07-09 KAP510 SJU → STT Jul 9, 19:05 UTCJul 9, 19:20 UTC15m
2026-07-09 KAP510 SJU → STT Jul 9, 16:15 UTCJul 9, 16:35 UTC20m
2026-07-08 KAP510 SJU → STT Jul 8, 20:00 UTCJul 8, 20:15 UTC15m
2026-07-08 KAP510 SJU → STT Jul 8, 18:00 UTCJul 8, 18:20 UTC20m
2026-07-08 KAP510 SJU → STT Jul 8, 16:35 UTCJul 8, 16:50 UTC15m
2026-07-08 KAP510 SJU → STT Jul 8, 15:45 UTCJul 8, 15:55 UTC10m

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 N68391 page for operator, model, and routing details .

Mode-S A91209 frequently asked

What is Mode-S code A91209?
A91209 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N68391.
Where is Mode-S A91209 registered?
Mode-S code A91209 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 A91209 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 18:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91209, octal 52211011, decimal 11,080,201.
What flights does A91209 operate?
Mode-S A91209 has broadcast 20 distinct callsigns, including KAP202, KAP1903, KAP333, KAP157, KAP11.