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sensors Mode-S transponder

A01B31

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N106CA · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC

Hex
A01B31
Octal
50015461
Decimal
10,492,721
Country
US
Tail
N106CA
Type
C402
No current signal · last broadcast 12h ago
Flights observed
231
Distinct callsigns
20
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S A01B31.

Country allocation

The ICAO 24-bit address A01B31 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
KAP27 Cape Air 25 2026-05-28
KAP65 - 23 2026-06-16
KAP323 Cape Air 19 2026-06-14
KAP1903 - 18 2026-07-09
KAP2 - 16 2026-07-10
KAP91 Cape Air 15 2026-05-13
KAP186 Cape Air 14 2026-05-11
KAP202 Cape Air 12 2026-05-25
KAP70 Cape Air 10 2026-06-09
KAP335 - 10 2026-07-13
KAP230 - 8 2026-06-21
KAP98 Cape Air 6 2026-04-16
KAP514 - 6 2026-06-23
KAP107 - 6 2026-07-03
KAP713 Cape Air 4 2026-04-28
KAP369 Cape Air 4 2026-04-17
KAP87 Cape Air 3 2026-05-01
KAP63 - 3 2026-06-19
KAP627 Cape Air 3 2026-05-23
KAP6 Cape Air 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAP335 - Jul 13, 14:05 UTCJul 13, 14:25 UTC20m
2026-07-13 KAP335 - Jul 13, 12:50 UTCJul 13, 13:10 UTC20m
2026-07-12 KAP335 - Jul 12, 13:30 UTCJul 12, 13:45 UTC15m
2026-07-12 KAP335 - Jul 12, 12:35 UTCJul 12, 12:50 UTC15m
2026-07-11 KAP335 - Jul 11, 14:15 UTCJul 11, 14:25 UTC10m
2026-07-11 KAP335 - Jul 11, 13:20 UTCJul 11, 13:40 UTC20m
2026-07-10 KAP2 - Jul 10, 22:35 UTCJul 10, 22:50 UTC15m
2026-07-10 KAP2 - Jul 10, 19:45 UTCJul 10, 19:55 UTC10m
2026-07-10 KAP2 - Jul 10, 15:55 UTCJul 10, 16:10 UTC15m
2026-07-10 KAP2 - Jul 10, 14:50 UTCJul 10, 15:10 UTC20m
2026-07-10 KAP189 - Jul 10, 11:35 UTCJul 10, 11:55 UTC20m
2026-07-09 KAP47 - Jul 9, 23:40 UTCJul 9, 23:55 UTC15m
2026-07-09 KAP47 - Jul 9, 22:35 UTCJul 9, 22:50 UTC15m
2026-07-09 KAP1903 - Jul 9, 19:45 UTCJul 9, 20:00 UTC15m
2026-07-09 KAP1903 - Jul 9, 16:35 UTCJul 9, 16:50 UTC15m
2026-07-09 KAP1903 - Jul 9, 15:25 UTCJul 9, 15:40 UTC15m
2026-07-09 KAP1903 - Jul 9, 13:15 UTCJul 9, 13:30 UTC15m
2026-07-08 KAP211 - Jul 8, 21:50 UTCJul 8, 22:05 UTC15m
2026-07-06 KAP2 - Jul 6, 22:55 UTCJul 6, 23:10 UTC15m
2026-07-06 KAP2 - Jul 6, 20:20 UTCJul 6, 20:30 UTC10m
2026-07-06 KAP2 - Jul 6, 16:30 UTCJul 6, 16:50 UTC20m
2026-07-06 KAP2 - Jul 6, 15:40 UTCJul 6, 15:50 UTC10m
2026-07-04 KAP2 - Jul 4, 22:50 UTCJul 4, 23:05 UTC15m
2026-07-04 KAP2 - Jul 4, 21:15 UTCJul 4, 21:25 UTC10m
2026-07-04 KAP2 - Jul 4, 18:45 UTCJul 4, 19:00 UTC15m
2026-07-04 KAP2 - Jul 4, 16:15 UTCJul 4, 16:35 UTC20m
2026-07-04 KAP2 - Jul 4, 15:20 UTCJul 4, 15:35 UTC15m
2026-07-03 KAP2 - Jul 3, 22:45 UTCJul 3, 23:00 UTC15m
2026-07-03 KAP2 - Jul 3, 20:15 UTCJul 3, 20:25 UTC10m
2026-07-03 KAP107 - Jul 3, 16:00 UTCJul 3, 16:20 UTC20m
2026-07-03 KAP107 - Jul 3, 15:05 UTCJul 3, 15:20 UTC15m
2026-07-02 KAP107 - Jul 2, 23:05 UTCJul 2, 23:25 UTC20m
2026-07-02 KAP107 - Jul 2, 20:30 UTCJul 2, 20:50 UTC20m
2026-07-02 KAP107 - Jul 2, 16:35 UTCJul 2, 16:50 UTC15m
2026-07-02 KAP107 - Jul 2, 15:25 UTCJul 2, 15:40 UTC15m
2026-07-01 KAP37 BOS → LEB Jul 1, 14:35 UTCJul 1, 14:50 UTC15m
2026-07-01 KAP37 BOS → LEB Jul 1, 13:40 UTCJul 1, 13:50 UTC10m
2026-06-30 KAP2 - Jun 30, 23:00 UTCJun 30, 23:10 UTC10m
2026-06-30 KAP211 - Jun 30, 16:15 UTCJun 30, 16:35 UTC20m
2026-06-24 KAP335 SJU → STT Jun 24, 18:15 UTCJun 24, 18:29 UTC15m
2026-06-24 KAP335 SJU → STT Jun 24, 17:29 UTCJun 24, 17:45 UTC15m
2026-06-24 KAP335 SJU → STT Jun 24, 13:50 UTCJun 24, 14:04 UTC15m
2026-06-24 KAP335 SJU → STT Jun 24, 13:00 UTCJun 24, 13:14 UTC15m
2026-06-23 KAP110 - Jun 23, 22:44 UTCJun 23, 23:05 UTC20m
2026-06-23 KAP514 - Jun 23, 21:05 UTCJun 23, 21:20 UTC15m
2026-06-23 KAP514 - Jun 23, 12:35 UTCJun 23, 12:55 UTC20m
2026-06-22 KAP1903 - Jun 22, 21:45 UTCJun 22, 21:54 UTC10m
2026-06-22 KAP1903 - Jun 22, 20:34 UTCJun 22, 20:55 UTC20m
2026-06-22 KAP1903 - Jun 22, 18:54 UTCJun 22, 19:09 UTC15m
2026-06-22 KAP1903 - Jun 22, 16:45 UTCJun 22, 17:00 UTC15m

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 N106CA page for operator, model, and routing details .

Mode-S A01B31 frequently asked

What is Mode-S code A01B31?
A01B31 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N106CA.
Where is Mode-S A01B31 registered?
Mode-S code A01B31 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 A01B31 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 A01B31, octal 50015461, decimal 10,492,721.
What flights does A01B31 operate?
Mode-S A01B31 has broadcast 20 distinct callsigns, including KAP27, KAP65, KAP323, KAP1903, KAP2.