Apparatus

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sensors Mode-S transponder

A8FFA1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N67909 · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC DBA, CAPE AIR

Hex
A8FFA1
Octal
52177641
Decimal
11,075,489
Country
US
Tail
N67909
Type
C402
No current signal · last broadcast Jul 25, 18:40 UTC
Flights observed
364
Distinct callsigns
10
Country
US
Last broadcast
Jul 25, 18:40 UTC

Last known position

Most recent position reported by Mode-S A8FFA1.

Country allocation

The ICAO 24-bit address A8FFA1 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 10 distinct

Callsign Airline Flights Last seen
KAP22 Cape Air 191 2026-07-25
KAP615 Cape Air 142 2026-07-23
KAP394 - 12 2026-07-03
KAP1271 - 7 2026-07-11
KAP916 - 6 2026-06-30
KAPT978 - 2 2026-06-25
N67909 - 1 2026-07-07
KAPT787 - 1 2026-05-25
KAPT240 - 1 2026-06-11
KAP16 - 1 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 KAP22 ACK → BOS Jul 25, 18:30 UTCJul 25, 18:40 UTC10m
2026-07-25 KAP22 ACK → BOS Jul 25, 16:45 UTCJul 25, 16:55 UTC10m
2026-07-25 KAP22 ACK → BOS Jul 25, 12:40 UTCJul 25, 12:50 UTC10m
2026-07-25 KAP22 ACK → BOS Jul 25, 11:10 UTCJul 25, 11:20 UTC10m
2026-07-24 KAP22 ACK → BOS Jul 24, 18:20 UTCJul 24, 18:30 UTC10m
2026-07-24 KAP22 ACK → BOS Jul 24, 16:40 UTCJul 24, 16:55 UTC15m
2026-07-24 KAP22 ACK → BOS Jul 24, 13:25 UTCJul 24, 13:35 UTC10m
2026-07-24 KAP22 ACK → BOS Jul 24, 12:40 UTCJul 24, 12:50 UTC10m
2026-07-24 KAP22 ACK → BOS Jul 24, 10:30 UTCJul 24, 11:15 UTC45m
2026-07-23 KAP615 HYA → BOS Jul 23, 11:10 UTCJul 23, 11:20 UTC10m
2026-07-22 KAP615 HYA → BOS Jul 22, 22:15 UTCJul 22, 22:30 UTC15m
2026-07-22 KAP615 HYA → BOS Jul 22, 20:45 UTCJul 22, 21:00 UTC15m
2026-07-22 KAP615 HYA → BOS Jul 22, 12:45 UTCJul 22, 13:40 UTC55m
2026-07-21 KAP615 - Jul 21, 22:25 UTCJul 21, 22:40 UTC15m
2026-07-21 KAP615 - Jul 21, 20:35 UTCJul 21, 20:50 UTC15m
2026-07-21 KAP615 - Jul 21, 12:40 UTCJul 21, 12:50 UTC10m
2026-07-21 KAP615 - Jul 21, 10:30 UTCJul 21, 11:15 UTC45m
2026-07-20 KAP615 - Jul 20, 16:45 UTCJul 20, 17:30 UTC45m
2026-07-20 KAP615 - Jul 20, 12:45 UTCJul 20, 13:30 UTC45m
2026-07-20 KAP615 - Jul 20, 11:15 UTCJul 20, 11:25 UTC10m
2026-07-18 KAP22 ACK → BOS Jul 18, 16:30 UTCJul 18, 16:40 UTC10m
2026-07-18 KAP22 ACK → BOS Jul 18, 10:30 UTCJul 18, 11:20 UTC50m
2026-07-17 KAP22 - Jul 17, 19:30 UTCJul 17, 20:10 UTC40m
2026-07-17 KAP22 - Jul 17, 12:45 UTCJul 17, 13:25 UTC40m
2026-07-17 KAP22 - Jul 17, 10:25 UTCJul 17, 10:35 UTC10m
2026-07-16 KAP22 - Jul 16, 22:00 UTCJul 16, 22:10 UTC10m
2026-07-16 KAP22 - Jul 16, 20:39 UTCJul 16, 20:49 UTC10m
2026-07-16 KAP22 - Jul 16, 18:44 UTCJul 16, 18:55 UTC10m
2026-07-15 KAP615 - Jul 15, 22:05 UTCJul 15, 22:15 UTC10m
2026-07-15 KAP615 - Jul 15, 12:30 UTCJul 15, 12:40 UTC10m
2026-07-14 KAP615 - Jul 14, 20:40 UTCJul 14, 20:50 UTC10m
2026-07-14 KAP615 - Jul 14, 12:40 UTCJul 14, 13:25 UTC45m
2026-07-11 KAP1271 - Jul 11, 18:10 UTCJul 11, 18:20 UTC10m
2026-07-11 KAP1271 - Jul 11, 16:20 UTCJul 11, 16:30 UTC10m
2026-07-10 KAP1271 - Jul 10, 17:05 UTCJul 10, 17:15 UTC10m
2026-07-10 KAP1271 - Jul 10, 13:00 UTCJul 10, 13:50 UTC50m
2026-07-10 KAP1271 - Jul 10, 11:10 UTCJul 10, 11:20 UTC10m
2026-07-09 KAP615 - Jul 9, 12:20 UTCJul 9, 12:30 UTC10m
2026-07-09 KAP615 - Jul 9, 11:10 UTCJul 9, 11:20 UTC10m
2026-07-08 KAP615 - Jul 8, 20:40 UTCJul 8, 20:50 UTC10m
2026-07-08 KAP615 - Jul 8, 12:35 UTCJul 8, 13:20 UTC45m
2026-07-08 KAP615 - Jul 8, 11:20 UTCJul 8, 11:30 UTC10m
2026-07-08 KAP615 - Jul 8, 10:25 UTCJul 8, 10:40 UTC15m
2026-07-07 N67909 - Jul 7, 23:00 UTCJul 7, 23:10 UTC10m
2026-07-07 KAP615 - Jul 7, 18:30 UTCJul 7, 18:45 UTC15m
2026-07-07 KAP615 - Jul 7, 17:20 UTCJul 7, 17:30 UTC10m
2026-07-07 KAP615 - Jul 7, 10:30 UTCJul 7, 10:45 UTC15m
2026-07-03 KAP394 - Jul 3, 17:35 UTCJul 3, 18:10 UTC35m
2026-07-03 KAP394 - Jul 3, 14:45 UTCJul 3, 14:55 UTC10m
2026-07-03 KAP394 - Jul 3, 12:15 UTCJul 3, 12:55 UTC40m

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 N67909 page for operator, model, and routing details .

Mode-S A8FFA1 frequently asked

What is Mode-S code A8FFA1?
A8FFA1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N67909.
Where is Mode-S A8FFA1 registered?
Mode-S code A8FFA1 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 A8FFA1 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 18:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8FFA1, octal 52177641, decimal 11,075,489.
What flights does A8FFA1 operate?
Mode-S A8FFA1 has broadcast 10 distinct callsigns, including KAP22, KAP615, KAP394, KAP1271, KAP916.