Apparatus

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sensors Mode-S transponder

AD1FEE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N945CA · TECNAM P-2012 Traveller · operated by HYANNIS AIR SERVICE INC

Hex
AD1FEE
Octal
53217756
Decimal
11,345,902
Country
US
Tail
N945CA
Type
P212
No current signal · last broadcast 6h ago
Flights observed
262
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S AD1FEE.

Country allocation

The ICAO 24-bit address AD1FEE 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
KAP5050 Cape Air 41 2026-06-17
KAP1333 Cape Air 16 2026-06-08
KAPT241 - 14 2026-07-02
KAP734 - 14 2026-06-14
KAP1850 Cape Air 14 2026-06-17
KAP82 Cape Air 8 2026-06-05
KAP2112 - 8 2026-07-09
KAP68 - 7 2026-07-05
KAP5483 Cape Air 7 2026-06-19
KAP1856 Cape Air 7 2026-05-14
KAP801 - 6 2026-07-02
KAP7021 Cape Air 6 2026-05-16
KAP926 Cape Air 5 2026-05-20
KAP922 Cape Air 5 2026-05-01
KAP164 Cape Air 5 2026-06-14
KAP1006 Cape Air 5 2026-05-21
KAP388 - 4 2026-04-14
KAP325 - 4 2026-07-08
KAP1874 - 4 2026-07-13
KAP14 - 4 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KAP18 BOS → RKD Jul 13, 21:50 UTCJul 13, 22:45 UTC55m
2026-07-13 KAP1858 RKD → BOS Jul 13, 19:35 UTCJul 13, 20:40 UTC1h 5m
2026-07-13 KAP18 BOS → RKD Jul 13, 17:45 UTCJul 13, 18:40 UTC55m
2026-07-13 KAP1874 LEB → BOS Jul 13, 15:05 UTCJul 13, 15:55 UTC50m
2026-07-12 KAP86 - Jul 12, 21:45 UTCJul 12, 22:25 UTC40m
2026-07-12 KAP1880 LEB → BOS Jul 12, 20:10 UTCJul 12, 21:00 UTC50m
2026-07-12 KAP86 - Jul 12, 18:35 UTCJul 12, 19:15 UTC40m
2026-07-12 KAP6178 - Jul 12, 17:35 UTCJul 12, 18:01 UTC25m
2026-07-10 KAP54 - Jul 10, 15:15 UTCJul 10, 15:45 UTC30m
2026-07-10 KAP54 - Jul 10, 13:40 UTCJul 10, 14:15 UTC35m
2026-07-09 KAP54 - Jul 9, 23:35 UTCJul 10, 00:10 UTC35m
2026-07-09 KAP1874 LEB → BOS Jul 9, 15:10 UTCJul 9, 15:50 UTC40m
2026-07-09 KAP2112 BOS → LEB Jul 9, 13:00 UTCJul 9, 13:45 UTC45m
2026-07-09 KAP2112 LEB → BOS Jul 9, 11:20 UTCJul 9, 12:00 UTC40m
2026-07-08 KAP325 - Jul 8, 21:05 UTCJul 8, 22:10 UTC1h 5m
2026-07-08 KAP325 LEB → HPN Jul 8, 19:10 UTCJul 8, 20:20 UTC1h 10m
2026-07-08 KAP325 - Jul 8, 15:50 UTCJul 8, 17:00 UTC1h 10m
2026-07-08 KAP325 LEB → HPN Jul 8, 14:20 UTCJul 8, 15:20 UTC1h 0m
2026-07-06 KAP45 - Jul 6, 14:55 UTCJul 6, 15:40 UTC45m
2026-07-05 KAP68 - Jul 5, 16:40 UTCJul 5, 17:55 UTC1h 15m
2026-07-05 KAP52 - Jul 5, 11:15 UTCJul 5, 12:15 UTC1h 0m
2026-07-04 KAP626 - Jul 4, 21:10 UTCJul 4, 22:05 UTC55m
2026-07-02 KAP801 BOS → BNH Jul 2, 19:40 UTCJul 2, 19:55 UTC15m
2026-07-02 KAP801 - Jul 2, 18:25 UTCJul 2, 18:45 UTC20m
2026-07-02 KAPT241 - Jul 2, 14:35 UTCJul 2, 15:40 UTC1h 5m
2026-07-02 KAPT18 - Jul 2, 10:50 UTCJul 2, 12:35 UTC1h 45m
2026-07-01 KAPT241 - Jul 1, 22:15 UTCJul 1, 23:10 UTC55m
2026-07-01 KAPT241 - Jul 1, 20:35 UTCJul 1, 21:35 UTC1h 0m
2026-07-01 KAP801 - Jul 1, 17:20 UTCJul 1, 18:30 UTC1h 10m
2026-06-30 KAP801 - Jun 30, 17:45 UTCJun 30, 18:55 UTC1h 10m
2026-06-29 KAPT241 - Jun 29, 22:24 UTCJun 29, 23:39 UTC1h 15m
2026-06-29 KAPT241 - Jun 29, 21:19 UTCJun 29, 21:39 UTC20m
2026-06-29 KAPT241 - Jun 29, 20:00 UTCJun 29, 20:40 UTC40m
2026-06-29 KAPT241 - Jun 29, 17:14 UTCJun 29, 17:45 UTC30m
2026-06-29 KAPT241 - Jun 29, 16:19 UTCJun 29, 17:10 UTC50m
2026-06-28 KAPT2 - Jun 28, 18:34 UTCJun 28, 19:40 UTC1h 5m
2026-06-27 KAP729 - Jun 27, 19:34 UTCJun 27, 20:14 UTC40m
2026-06-27 KAP729 - Jun 27, 12:39 UTCJun 27, 13:00 UTC20m
2026-06-26 KAPT241 - Jun 26, 00:15 UTCJun 26, 01:10 UTC55m
2026-06-25 KAPT241 - Jun 25, 22:34 UTCJun 25, 23:39 UTC1h 5m
2026-06-25 KAPT241 - Jun 25, 17:20 UTCJun 25, 18:55 UTC1h 35m
2026-06-24 KAPT241 - Jun 24, 22:45 UTCJun 24, 23:50 UTC1h 5m
2026-06-24 KAPT241 - Jun 24, 21:04 UTCJun 24, 22:04 UTC1h 0m
2026-06-24 KAPT787 - Jun 24, 17:40 UTCJun 24, 19:00 UTC1h 20m
2026-06-24 KAP32 BOS → LEB Jun 24, 15:49 UTCJun 24, 16:45 UTC55m
2026-06-22 KAP32 BOS → LEB Jun 22, 20:19 UTCJun 22, 20:44 UTC25m
2026-06-22 KAP45 - Jun 22, 14:40 UTCJun 22, 16:20 UTC1h 40m
2026-06-21 KAP68 - Jun 21, 21:54 UTCJun 21, 23:14 UTC1h 20m
2026-06-21 KAP1034 SLK → BOS Jun 21, 19:00 UTCJun 21, 20:14 UTC1h 15m
2026-06-21 KAP68 - Jun 21, 15:59 UTCJun 21, 17:24 UTC1h 25m

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 N945CA page for operator, model, and routing details .

Mode-S AD1FEE frequently asked

What is Mode-S code AD1FEE?
AD1FEE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N945CA.
Where is Mode-S AD1FEE registered?
Mode-S code AD1FEE 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 AD1FEE broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD1FEE, octal 53217756, decimal 11,345,902.
What flights does AD1FEE operate?
Mode-S AD1FEE has broadcast 20 distinct callsigns, including KAP5050, KAP1333, KAPT241, KAP734, KAP1850.