Apparatus

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sensors Mode-S transponder

A4AFC8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N40057 · PIPER PA-28-140/150/160/180 · operated by HOVNANYAN ARI, ARISTIZABAL LEONARDO

Hex
A4AFC8
Octal
51127710
Decimal
10,792,904
Country
US
Tail
N40057
Type
P28A
No current signal · last broadcast 16h ago
Flights observed
63
Distinct callsigns
1
Country
US
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S A4AFC8.

Country allocation

The ICAO 24-bit address A4AFC8 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
N40057 - 63 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 N40057 VNY → VNY Jul 17, 16:29 UTCJul 17, 18:10 UTC1h 40m
2026-07-15 N40057 - Jul 15, 20:25 UTCJul 15, 20:45 UTC20m
2026-07-15 N40057 - Jul 15, 17:40 UTCJul 15, 19:00 UTC1h 20m
2026-07-14 N40057 - Jul 14, 19:00 UTCJul 14, 19:55 UTC55m
2026-07-14 N40057 - Jul 14, 17:50 UTCJul 14, 18:45 UTC55m
2026-07-14 N40057 VNY → SBP Jul 14, 14:55 UTCJul 14, 16:20 UTC1h 25m
2026-07-13 N40057 - Jul 13, 21:10 UTCJul 13, 21:30 UTC20m
2026-07-13 N40057 - Jul 13, 19:35 UTCJul 13, 20:30 UTC55m
2026-07-11 N40057 VNY → VNY Jul 11, 03:55 UTCJul 11, 07:05 UTC3h 10m
2026-07-09 N40057 SMX → VNY Jul 9, 04:10 UTCJul 9, 05:25 UTC1h 15m
2026-07-09 N40057 VNY → SMX Jul 9, 02:25 UTCJul 9, 04:00 UTC1h 35m
2026-07-08 N40057 VNY → VNY Jul 8, 22:40 UTCJul 9, 01:20 UTC2h 40m
2026-07-08 N40057 VNY → VNY Jul 8, 17:00 UTCJul 8, 18:35 UTC1h 35m
2026-07-02 N40057 - Jul 2, 21:05 UTCJul 2, 22:20 UTC1h 15m
2026-07-02 N40057 - Jul 2, 18:50 UTCJul 2, 20:15 UTC1h 25m
2026-07-01 N40057 SMX → VNY Jul 1, 17:50 UTCJul 1, 19:05 UTC1h 15m
2026-07-01 N40057 VNY → SMX Jul 1, 16:00 UTCJul 1, 17:35 UTC1h 35m
2026-07-01 N40057 RBK → VNY Jul 1, 01:35 UTCJul 1, 02:45 UTC1h 10m
2026-06-30 N40057 VNY → RBK Jun 30, 22:50 UTCJun 30, 23:50 UTC1h 0m
2026-06-29 N40057 VNY → VNY Jun 29, 03:34 UTCJun 29, 05:15 UTC1h 40m
2026-06-26 N40057 VNY → VNY Jun 26, 19:20 UTCJun 26, 20:24 UTC1h 5m
2026-06-25 N40057 VNY → VNY Jun 25, 03:44 UTCJun 25, 04:45 UTC1h 0m
2026-06-24 N40057 - Jun 24, 19:00 UTCJun 24, 19:49 UTC50m
2026-06-24 N40057 VNY → RAL Jun 24, 18:05 UTCJun 24, 18:50 UTC45m
2026-06-24 N40057 VNY → VNY Jun 24, 04:05 UTCJun 24, 06:29 UTC2h 25m
2026-06-23 N40057 VNY → VNY Jun 23, 23:00 UTCJun 24, 00:49 UTC1h 50m
2026-06-18 N40057 VNY → VNY Jun 18, 00:30 UTCJun 18, 02:05 UTC1h 35m
2026-06-17 N40057 VNY → VNY Jun 17, 20:25 UTCJun 17, 23:00 UTC2h 35m
2026-06-14 N40057 - Jun 14, 21:10 UTCJun 14, 23:10 UTC2h 0m
2026-06-14 N40057 - Jun 14, 16:10 UTCJun 14, 19:20 UTC3h 10m
2026-06-13 N40057 - Jun 13, 19:35 UTCJun 13, 20:00 UTC25m
2026-06-13 N40057 - Jun 13, 17:45 UTCJun 13, 18:10 UTC25m
2026-06-13 N40057 VNY → VNY Jun 13, 15:00 UTCJun 13, 15:05 UTC5m
2026-06-12 N40057 VNY → VNY Jun 12, 20:15 UTCJun 12, 21:10 UTC55m
2026-06-12 N40057 VNY → VNY Jun 12, 17:25 UTCJun 12, 18:55 UTC1h 30m
2026-06-10 N40057 VNY → VNY Jun 10, 17:30 UTCJun 10, 20:30 UTC3h 0m
2026-06-09 N40057 - Jun 9, 22:50 UTCJun 9, 23:35 UTC45m
2026-06-09 N40057 - Jun 9, 21:45 UTCJun 9, 22:40 UTC55m
2026-06-09 N40057 - Jun 9, 19:25 UTCJun 9, 21:05 UTC1h 40m
2026-06-05 N40057 VNY → VNY Jun 5, 19:50 UTCJun 5, 21:25 UTC1h 35m
2026-05-31 N40057 - May 31, 18:00 UTCMay 31, 20:10 UTC2h 10m
2026-05-31 N40057 - May 31, 14:45 UTCMay 31, 16:25 UTC1h 40m
2026-05-29 N40057 VNY → VNY May 29, 16:40 UTCMay 29, 17:55 UTC1h 15m
2026-05-21 N40057 - May 21, 23:30 UTCMay 22, 02:30 UTC3h 0m
2026-05-21 N40057 - May 21, 16:55 UTCMay 21, 20:00 UTC3h 5m
2026-05-19 N40057 VNY → VNY May 19, 19:20 UTCMay 19, 22:15 UTC2h 55m
2026-05-19 N40057 VNY → VNY May 19, 03:35 UTCMay 19, 06:10 UTC2h 35m
2026-05-14 N40057 - May 14, 22:30 UTCMay 14, 23:20 UTC50m
2026-05-02 N40057 - May 2, 20:00 UTCMay 3, 00:05 UTC4h 5m
2026-05-02 N40057 - May 2, 01:10 UTCMay 2, 02:30 UTC1h 20m

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 N40057 page for operator, model, and routing details .

Mode-S A4AFC8 frequently asked

What is Mode-S code A4AFC8?
A4AFC8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N40057.
Where is Mode-S A4AFC8 registered?
Mode-S code A4AFC8 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 A4AFC8 broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4AFC8, octal 51127710, decimal 10,792,904.
What flights does A4AFC8 operate?
Mode-S A4AFC8 has broadcast 1 distinct callsign, including N40057.