Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A74D57

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N57PB · CESSNA 402 Businessliner · operated by HYANNIS AIR SERVICE INC DBA, CAPE AIR

Hex
A74D57
Octal
51646527
Decimal
10,964,311
Country
US
Tail
N57PB
Type
C402
No current signal · last broadcast Jul 23, 16:40 UTC
Flights observed
315
Distinct callsigns
20
Country
US
Last broadcast
Jul 23, 16:40 UTC

Last known position

Most recent position reported by Mode-S A74D57.

Country allocation

The ICAO 24-bit address A74D57 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
KAP548 - 21 2026-07-07
KAP519 - 15 2026-07-15
KAP42 Cape Air 14 2026-05-27
KAP115 Cape Air 14 2026-04-23
KAP426 - 13 2026-07-05
KAP811 Cape Air 11 2026-04-28
KAP109 - 11 2026-07-18
KAP325 - 10 2026-06-24
KAP314 Cape Air 10 2026-06-20
KAP616 Cape Air 9 2026-05-14
KAP501 - 9 2026-06-21
KAP54 - 8 2026-07-09
KAP100 Cape Air 8 2026-06-13
KAP876 Cape Air 7 2026-05-31
KAP87 - 7 2026-06-28
KAP1834 Cape Air 7 2026-04-23
KAP110 Cape Air 7 2026-05-30
KAPT58 - 6 2026-07-21
KAP78 Cape Air 6 2026-05-02
KAP394 - 6 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 KAP635 STT → SJU Jul 23, 15:25 UTCJul 23, 16:40 UTC1h 15m
2026-07-22 KAPT240 - Jul 22, 18:15 UTCJul 22, 19:35 UTC1h 20m
2026-07-21 KAPT58 - Jul 21, 16:30 UTCJul 21, 17:50 UTC1h 20m
2026-07-21 KAP394 - Jul 21, 01:25 UTCJul 21, 02:20 UTC55m
2026-07-21 KAP394 MVY → BOS Jul 21, 00:00 UTCJul 21, 00:35 UTC35m
2026-07-20 KAP394 BOS → MVY Jul 20, 22:25 UTCJul 20, 22:50 UTC25m
2026-07-20 KAP394 - Jul 20, 20:50 UTCJul 20, 21:30 UTC40m
2026-07-20 KAP394 - Jul 20, 19:30 UTCJul 20, 19:55 UTC25m
2026-07-20 KAP394 - Jul 20, 18:25 UTCJul 20, 18:55 UTC30m
2026-07-20 KAP924 STL → TBN Jul 20, 17:00 UTCJul 20, 17:10 UTC10m
2026-07-20 KAP924 STL → TBN Jul 20, 14:45 UTCJul 20, 16:25 UTC1h 40m
2026-07-20 KAP924 STL → TBN Jul 20, 11:50 UTCJul 20, 12:50 UTC1h 0m
2026-07-20 KAP924 STL → TBN Jul 20, 10:15 UTCJul 20, 10:30 UTC15m
2026-07-19 KAP296 - Jul 19, 17:55 UTCJul 19, 18:25 UTC30m
2026-07-19 KAP3021 - Jul 19, 16:45 UTCJul 19, 17:15 UTC30m
2026-07-19 KAP296 - Jul 19, 15:40 UTCJul 19, 16:05 UTC25m
2026-07-19 KAP3261 MVY → BOS Jul 19, 14:10 UTCJul 19, 14:45 UTC35m
2026-07-19 KAP296 - Jul 19, 12:30 UTCJul 19, 12:55 UTC25m
2026-07-19 KAP3201 - Jul 19, 11:10 UTCJul 19, 11:40 UTC30m
2026-07-18 KAP203 - Jul 18, 21:15 UTCJul 18, 21:30 UTC15m
2026-07-18 KAP203 - Jul 18, 18:50 UTCJul 18, 20:15 UTC1h 25m
2026-07-18 KAP203 - Jul 18, 17:50 UTCJul 18, 18:00 UTC10m
2026-07-18 KAP203 - Jul 18, 14:10 UTCJul 18, 15:10 UTC1h 0m
2026-07-18 KAP203 - Jul 18, 13:15 UTCJul 18, 13:25 UTC10m
2026-07-18 KAP109 - Jul 18, 00:45 UTCJul 18, 00:55 UTC10m
2026-07-17 KAP109 - Jul 17, 23:45 UTCJul 18, 00:10 UTC25m
2026-07-17 KAP109 - Jul 17, 22:00 UTCJul 17, 22:29 UTC30m
2026-07-17 KAP109 - Jul 17, 19:45 UTCJul 17, 20:20 UTC35m
2026-07-17 KAP109 - Jul 17, 18:19 UTCJul 17, 18:50 UTC30m
2026-07-17 KAP109 BOS → MVY Jul 17, 16:59 UTCJul 17, 17:20 UTC20m
2026-07-17 KAP109 - Jul 17, 15:55 UTCJul 17, 16:19 UTC25m
2026-07-17 KAP328 - Jul 17, 01:55 UTCJul 17, 02:20 UTC25m
2026-07-17 KAP6104 ACK → BOS Jul 17, 00:35 UTCJul 17, 01:15 UTC40m
2026-07-16 KAP328 - Jul 16, 22:05 UTCJul 16, 22:35 UTC30m
2026-07-16 KAP5201 - Jul 16, 20:15 UTCJul 16, 20:49 UTC35m
2026-07-16 KAP328 BOS → ACK Jul 16, 18:59 UTCJul 16, 19:35 UTC35m
2026-07-16 KAP7001 - Jul 16, 17:45 UTCJul 16, 18:05 UTC20m
2026-07-16 KAP516 - Jul 16, 12:34 UTCJul 16, 13:00 UTC25m
2026-07-16 KAP7041 - Jul 16, 11:20 UTCJul 16, 11:45 UTC25m
2026-07-16 KAPT58 HYA → HYA Jul 16, 00:40 UTCJul 16, 01:25 UTC45m
2026-07-15 KAPT58 - Jul 15, 20:25 UTCJul 15, 21:55 UTC1h 30m
2026-07-15 KAPT616 - Jul 15, 17:15 UTCJul 15, 18:00 UTC45m
2026-07-15 KAP519 - Jul 15, 02:20 UTCJul 15, 02:30 UTC10m
2026-07-15 KAP519 - Jul 15, 01:20 UTCJul 15, 01:45 UTC25m
2026-07-15 KAP6110 - Jul 15, 00:00 UTCJul 15, 00:45 UTC45m
2026-07-14 KAP519 - Jul 14, 22:35 UTCJul 14, 23:10 UTC34m
2026-07-14 KAP519 - Jul 14, 20:55 UTCJul 14, 21:35 UTC40m
2026-07-14 KAP519 - Jul 14, 19:50 UTCJul 14, 20:00 UTC10m
2026-07-13 KAP210 - Jul 13, 01:25 UTCJul 13, 02:25 UTC1h 0m
2026-07-13 KAP210 - Jul 13, 00:10 UTCJul 13, 00:40 UTC30m

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 N57PB page for operator, model, and routing details .

Mode-S A74D57 frequently asked

What is Mode-S code A74D57?
A74D57 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N57PB.
Where is Mode-S A74D57 registered?
Mode-S code A74D57 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 A74D57 broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 16:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A74D57, octal 51646527, decimal 10,964,311.
What flights does A74D57 operate?
Mode-S A74D57 has broadcast 20 distinct callsigns, including KAP548, KAP519, KAP42, KAP115, KAP426.