Apparatus

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sensors Mode-S transponder

A8C144

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N663VL · BRITTEN-NORMAN BN-2 Islander · operated by VIEQUES AIR LINK INC

Hex
A8C144
Octal
52140504
Decimal
11,059,524
Country
US
Tail
N663VL
Type
BN2P
No current signal · last broadcast 13h ago
Flights observed
96
Distinct callsigns
1
Country
US
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S A8C144.

Country allocation

The ICAO 24-bit address A8C144 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 1 distinct

Callsign Airline Flights Last seen
N663VL - 96 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 N663VL - May 29, 21:15 UTCMay 29, 21:30 UTC15m
2026-05-29 N663VL - May 29, 12:00 UTCMay 29, 12:15 UTC15m
2026-05-28 N663VL - May 28, 21:25 UTCMay 28, 21:40 UTC15m
2026-05-28 N663VL - May 28, 20:35 UTCMay 28, 20:50 UTC15m
2026-05-28 N663VL - May 28, 19:30 UTCMay 28, 19:40 UTC10m
2026-05-28 N663VL - May 28, 18:35 UTCMay 28, 18:55 UTC20m
2026-05-28 N663VL - May 28, 17:40 UTCMay 28, 17:55 UTC15m
2026-05-28 N663VL - May 28, 13:05 UTCMay 28, 13:20 UTC15m
2026-05-28 N663VL - May 28, 11:05 UTCMay 28, 11:20 UTC15m
2026-05-27 N663VL - May 27, 21:25 UTCMay 27, 21:35 UTC10m
2026-05-27 N663VL - May 27, 20:30 UTCMay 27, 20:45 UTC15m
2026-05-27 N663VL - May 27, 18:15 UTCMay 27, 18:30 UTC15m
2026-05-27 N663VL - May 27, 11:10 UTCMay 27, 11:25 UTC15m
2026-05-26 N663VL - May 26, 22:15 UTCMay 26, 22:25 UTC10m
2026-05-26 N663VL - May 26, 21:04 UTCMay 26, 21:14 UTC10m
2026-05-26 N663VL - May 26, 18:05 UTCMay 26, 18:19 UTC15m
2026-05-26 N663VL - May 26, 12:35 UTCMay 26, 13:15 UTC40m
2026-05-26 N663VL - May 26, 11:34 UTCMay 26, 11:54 UTC20m
2026-05-25 N663VL - May 25, 21:35 UTCMay 25, 21:49 UTC15m
2026-05-25 N663VL - May 25, 20:40 UTCMay 25, 20:59 UTC20m
2026-05-25 N663VL - May 25, 19:25 UTCMay 25, 19:44 UTC20m
2026-05-25 N663VL - May 25, 18:10 UTCMay 25, 18:30 UTC20m
2026-05-25 N663VL - May 25, 17:15 UTCMay 25, 17:35 UTC20m
2026-05-25 N663VL - May 25, 16:10 UTCMay 25, 16:30 UTC20m
2026-05-25 N663VL - May 25, 14:15 UTCMay 25, 14:30 UTC15m
2026-05-25 N663VL - May 25, 13:10 UTCMay 25, 13:30 UTC20m
2026-05-25 N663VL - May 25, 12:25 UTCMay 25, 12:40 UTC15m
2026-05-25 N663VL - May 25, 11:05 UTCMay 25, 11:20 UTC15m
2026-05-24 N663VL - May 24, 21:30 UTCMay 24, 21:50 UTC20m
2026-05-24 N663VL - May 24, 20:35 UTCMay 24, 20:50 UTC15m
2026-05-24 N663VL - May 24, 19:15 UTCMay 24, 19:30 UTC15m
2026-05-24 N663VL - May 24, 18:10 UTCMay 24, 18:25 UTC15m
2026-05-24 N663VL - May 24, 17:10 UTCMay 24, 17:25 UTC15m
2026-05-24 N663VL - May 24, 11:50 UTCMay 24, 12:05 UTC15m
2026-05-23 N663VL - May 23, 21:20 UTCMay 23, 21:40 UTC20m
2026-05-23 N663VL - May 23, 20:30 UTCMay 23, 20:50 UTC20m
2026-05-23 N663VL - May 23, 19:10 UTCMay 23, 19:25 UTC15m
2026-05-23 N663VL - May 23, 18:20 UTCMay 23, 18:35 UTC15m
2026-05-23 N663VL - May 23, 17:20 UTCMay 23, 17:30 UTC10m
2026-05-23 N663VL - May 23, 11:35 UTCMay 23, 11:50 UTC15m
2026-05-22 N663VL - May 22, 21:40 UTCMay 22, 21:50 UTC10m
2026-05-22 N663VL - May 22, 20:40 UTCMay 22, 20:55 UTC15m
2026-05-22 N663VL - May 22, 19:15 UTCMay 22, 19:30 UTC15m
2026-05-22 N663VL - May 22, 16:05 UTCMay 22, 16:20 UTC15m
2026-05-22 N663VL - May 22, 14:05 UTCMay 22, 14:20 UTC15m
2026-05-22 N663VL - May 22, 11:55 UTCMay 22, 12:10 UTC15m
2026-05-21 N663VL - May 21, 20:35 UTCMay 21, 21:40 UTC1h 5m
2026-05-21 N663VL - May 21, 19:20 UTCMay 21, 19:30 UTC10m
2026-05-21 N663VL - May 21, 16:10 UTCMay 21, 16:30 UTC20m
2026-05-21 N663VL - May 21, 14:15 UTCMay 21, 14:25 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 N663VL page for operator, model, and routing details .

Mode-S A8C144 frequently asked

What is Mode-S code A8C144?
A8C144 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N663VL.
Where is Mode-S A8C144 registered?
Mode-S code A8C144 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 A8C144 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8C144, octal 52140504, decimal 11,059,524.
What flights does A8C144 operate?
Mode-S A8C144 has broadcast 1 distinct callsign, including N663VL.