Apparatus

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sensors Mode-S transponder

A4EDC1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4167K · PIPER PA-28-140/150/160/180 · operated by SKYWEST LEASING INC

Hex
A4EDC1
Octal
51166701
Decimal
10,808,769
Country
US
Tail
N4167K
Type
P28A
No current signal · last broadcast 7d ago
Flights observed
106
Distinct callsigns
1
Country
US
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S A4EDC1.

Country allocation

The ICAO 24-bit address A4EDC1 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
ASI887 - 106 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 ASI887 - Jul 23, 18:10 UTCJul 23, 18:55 UTC45m
2026-07-23 ASI887 - Jul 23, 17:40 UTCJul 23, 18:05 UTC25m
2026-07-23 ASI887 - Jul 23, 14:25 UTCJul 23, 15:15 UTC50m
2026-07-23 ASI887 - Jul 23, 14:05 UTCJul 23, 14:15 UTC10m
2026-07-23 ASI887 DVT → DVT Jul 23, 11:55 UTCJul 23, 12:40 UTC45m
2026-07-23 ASI887 - Jul 23, 03:55 UTCJul 23, 06:10 UTC2h 15m
2026-07-23 ASI887 DVT → DVT Jul 23, 00:35 UTCJul 23, 01:00 UTC25m
2026-07-22 ASI887 - Jul 22, 21:45 UTCJul 22, 22:30 UTC45m
2026-07-22 ASI887 - Jul 22, 18:40 UTCJul 22, 19:45 UTC1h 5m
2026-07-22 ASI887 DVT → DVT Jul 22, 17:10 UTCJul 22, 17:35 UTC25m
2026-07-22 ASI887 - Jul 22, 16:20 UTCJul 22, 17:00 UTC40m
2026-07-21 ASI887 - Jul 21, 18:10 UTCJul 21, 20:45 UTC2h 35m
2026-07-21 ASI887 DVT → DVT Jul 21, 16:20 UTCJul 21, 17:10 UTC50m
2026-07-21 ASI887 - Jul 21, 14:15 UTCJul 21, 15:15 UTC1h 0m
2026-07-20 ASI887 - Jul 20, 17:15 UTCJul 20, 17:25 UTC10m
2026-07-20 ASI887 - Jul 20, 15:35 UTCJul 20, 16:15 UTC40m
2026-07-20 ASI887 DVT → DVT Jul 20, 03:20 UTCJul 20, 04:55 UTC1h 35m
2026-07-19 ASI887 DVT → DVT Jul 19, 22:05 UTCJul 19, 22:45 UTC40m
2026-07-19 ASI887 - Jul 19, 21:40 UTCJul 19, 22:00 UTC20m
2026-07-19 ASI887 DVT → DVT Jul 19, 18:15 UTCJul 19, 19:45 UTC1h 30m
2026-07-19 ASI887 - Jul 19, 03:20 UTCJul 19, 05:45 UTC2h 25m
2026-07-18 ASI887 - Jul 18, 20:50 UTCJul 18, 21:00 UTC10m
2026-07-18 ASI887 DVT → DVT Jul 18, 20:25 UTCJul 18, 20:45 UTC20m
2026-07-14 ASI887 - Jul 14, 19:30 UTCJul 14, 19:40 UTC10m
2026-07-14 ASI887 - Jul 14, 18:35 UTCJul 14, 19:25 UTC50m
2026-07-14 ASI887 DVT → DVT Jul 14, 16:50 UTCJul 14, 17:35 UTC45m
2026-07-14 ASI887 - Jul 14, 14:00 UTCJul 14, 14:25 UTC25m
2026-07-13 ASI887 - Jul 13, 16:15 UTCJul 13, 17:45 UTC1h 30m
2026-07-12 ASI887 DVT → DVT Jul 12, 15:10 UTCJul 12, 16:30 UTC1h 20m
2026-07-10 ASI887 - Jul 10, 03:50 UTCJul 10, 05:45 UTC1h 55m
2026-07-09 ASI887 DVT → DVT Jul 9, 17:15 UTCJul 9, 18:30 UTC1h 15m
2026-07-09 ASI887 - Jul 9, 14:30 UTCJul 9, 15:00 UTC30m
2026-07-09 ASI887 - Jul 9, 14:05 UTCJul 9, 14:25 UTC20m
2026-07-08 ASI887 - Jul 8, 15:25 UTCJul 8, 18:00 UTC2h 35m
2026-06-30 ASI887 DVT → DVT Jun 30, 21:40 UTCJun 30, 22:05 UTC25m
2026-06-30 ASI887 DVT → DVT Jun 30, 16:55 UTCJun 30, 17:45 UTC50m
2026-06-30 ASI887 DVT → DVT Jun 30, 14:05 UTCJun 30, 14:30 UTC25m
2026-06-29 ASI887 DVT → DVT Jun 29, 14:44 UTCJun 29, 14:54 UTC10m
2026-06-28 ASI887 DVT → DVT Jun 28, 14:14 UTCJun 28, 16:25 UTC2h 10m
2026-06-27 ASI887 - Jun 27, 16:20 UTCJun 27, 17:20 UTC1h 0m
2026-06-27 ASI887 DVT → DVT Jun 27, 15:34 UTCJun 27, 16:14 UTC40m
2026-06-26 ASI887 - Jun 26, 14:59 UTCJun 26, 16:09 UTC1h 10m
2026-06-25 ASI887 DVT → DVT Jun 25, 16:59 UTCJun 25, 18:34 UTC1h 35m
2026-06-22 ASI887 DVT → DVT Jun 22, 20:55 UTCJun 22, 22:15 UTC1h 20m
2026-06-22 ASI887 HII → DVT Jun 22, 17:04 UTCJun 22, 18:35 UTC1h 30m
2026-06-22 ASI887 DVT → HII Jun 22, 13:19 UTCJun 22, 15:54 UTC2h 35m
2026-06-22 ASI887 DVT → DVT Jun 22, 03:19 UTCJun 22, 04:44 UTC1h 25m
2026-06-18 ASI887 DVT → DVT Jun 18, 13:15 UTCJun 18, 15:45 UTC2h 30m
2026-06-17 ASI887 DVT → DVT Jun 17, 20:05 UTCJun 17, 21:55 UTC1h 50m
2026-06-17 ASI887 - Jun 17, 13:45 UTCJun 17, 15:10 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 N4167K page for operator, model, and routing details .

Mode-S A4EDC1 frequently asked

What is Mode-S code A4EDC1?
A4EDC1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4167K.
Where is Mode-S A4EDC1 registered?
Mode-S code A4EDC1 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 A4EDC1 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4EDC1, octal 51166701, decimal 10,808,769.
What flights does A4EDC1 operate?
Mode-S A4EDC1 has broadcast 1 distinct callsign, including ASI887.