Apparatus

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sensors Mode-S transponder

A4E60A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4145G · PIPER PA-28-140/150/160/180 · operated by UNIVERSITY OF ILLINOIS, BOARD OF TRUSTEES

Hex
A4E60A
Octal
51163012
Decimal
10,806,794
Country
US
Tail
N4145G
Type
P28A
No current signal · last broadcast 19d ago
Flights observed
88
Distinct callsigns
1
Country
US
Last broadcast
19d ago

Last known position

Most recent position reported by Mode-S A4E60A.

Country allocation

The ICAO 24-bit address A4E60A 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
ILU45G - 88 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-24 ILU45G - Jun 24, 15:59 UTCJun 24, 16:50 UTC50m
2026-06-24 ILU45G CMI → CMI Jun 24, 14:09 UTCJun 24, 15:14 UTC1h 5m
2026-06-24 ILU45G - Jun 24, 13:00 UTCJun 24, 13:20 UTC20m
2026-06-24 ILU45G CMI → CMI Jun 24, 11:45 UTCJun 24, 12:20 UTC35m
2026-06-24 ILU45G CMI → CMI Jun 24, 02:09 UTCJun 24, 04:24 UTC2h 15m
2026-06-23 ILU45G - Jun 23, 23:19 UTCJun 24, 00:09 UTC50m
2026-06-23 ILU45G CMI → CMI Jun 23, 21:05 UTCJun 23, 21:34 UTC30m
2026-06-23 ILU45G CMI → CMI Jun 23, 18:34 UTCJun 23, 19:34 UTC1h 0m
2026-06-23 ILU45G - Jun 23, 15:24 UTCJun 23, 17:09 UTC1h 45m
2026-06-23 ILU45G - Jun 23, 11:59 UTCJun 23, 13:00 UTC1h 0m
2026-06-23 ILU45G - Jun 23, 01:20 UTCJun 23, 02:04 UTC45m
2026-06-22 ILU45G - Jun 22, 21:45 UTCJun 22, 22:05 UTC20m
2026-06-19 ILU45G - Jun 19, 21:04 UTCJun 19, 21:39 UTC35m
2026-06-19 ILU45G - Jun 19, 17:29 UTCJun 19, 18:34 UTC1h 5m
2026-06-19 ILU45G CMI → CMI Jun 19, 14:09 UTCJun 19, 14:49 UTC40m
2026-06-19 ILU45G - Jun 19, 11:34 UTCJun 19, 13:29 UTC1h 55m
2026-06-19 ILU45G - Jun 19, 01:54 UTCJun 19, 05:05 UTC3h 10m
2026-06-18 ILU45G CMI → CMI Jun 18, 17:30 UTCJun 18, 18:05 UTC35m
2026-06-18 ILU45G - Jun 18, 15:50 UTCJun 18, 16:45 UTC55m
2026-06-18 ILU45G CMI → CMI Jun 18, 13:50 UTCJun 18, 14:35 UTC45m
2026-06-16 ILU45G - Jun 16, 01:50 UTCJun 16, 04:15 UTC2h 25m
2026-06-15 ILU45G - Jun 15, 22:40 UTCJun 16, 00:55 UTC2h 15m
2026-06-15 ILU45G CMI → CMI Jun 15, 20:30 UTCJun 15, 21:40 UTC1h 10m
2026-06-15 ILU45G CMI → CMI Jun 15, 18:45 UTCJun 15, 19:14 UTC30m
2026-06-15 ILU45G CMI → CMI Jun 15, 16:45 UTCJun 15, 17:10 UTC25m
2026-06-15 ILU45G - Jun 15, 13:20 UTCJun 15, 14:50 UTC1h 30m
2026-06-15 ILU45G CMI → CMI Jun 15, 03:10 UTCJun 15, 03:19 UTC10m
2026-06-14 ILU45G CMI → CMI Jun 14, 23:59 UTCJun 15, 02:04 UTC2h 5m
2026-06-13 ILU45G CMI → CMI Jun 13, 15:35 UTCJun 13, 16:45 UTC1h 10m
2026-06-13 ILU45G - Jun 13, 13:40 UTCJun 13, 14:45 UTC1h 5m
2026-06-13 ILU45G - Jun 13, 02:15 UTCJun 13, 04:00 UTC1h 44m
2026-06-12 ILU45G CMI → CMI Jun 12, 23:40 UTCJun 13, 00:20 UTC40m
2026-06-12 ILU45G CMI → CMI Jun 12, 20:50 UTCJun 12, 21:25 UTC35m
2026-06-12 ILU45G - Jun 12, 18:40 UTCJun 12, 19:40 UTC1h 0m
2026-06-12 ILU45G CMI → CMI Jun 12, 15:30 UTCJun 12, 16:50 UTC1h 20m
2026-06-12 ILU45G CMI → CMI Jun 12, 13:30 UTCJun 12, 14:45 UTC1h 15m
2026-06-11 ILU45G - Jun 11, 17:30 UTCJun 11, 18:50 UTC1h 20m
2026-06-11 ILU45G - Jun 11, 14:10 UTCJun 11, 15:00 UTC50m
2026-06-09 ILU45G CMI → CMI Jun 9, 17:25 UTCJun 9, 18:20 UTC55m
2026-06-09 ILU45G - Jun 9, 15:30 UTCJun 9, 15:50 UTC20m
2026-06-09 ILU45G CMI → CMI Jun 9, 13:40 UTCJun 9, 14:10 UTC30m
2026-06-04 ILU45G - Jun 4, 14:05 UTCJun 4, 14:50 UTC45m
2026-05-14 ILU45G - May 14, 18:35 UTCMay 14, 19:45 UTC1h 10m
2026-05-14 ILU45G - May 14, 15:50 UTCMay 14, 16:05 UTC15m
2026-05-14 ILU45G CMI → CMI May 14, 13:35 UTCMay 14, 14:25 UTC50m
2026-05-13 ILU45G - May 13, 16:05 UTCMay 13, 17:10 UTC1h 5m
2026-05-13 ILU45G - May 13, 13:35 UTCMay 13, 15:10 UTC1h 35m
2026-05-12 ILU45G CMI → CMI May 12, 14:00 UTCMay 12, 15:10 UTC1h 10m
2026-05-12 ILU45G - May 12, 11:45 UTCMay 12, 13:15 UTC1h 30m
2026-05-11 ILU45G - May 11, 19:10 UTCMay 11, 20:35 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 N4145G page for operator, model, and routing details .

Mode-S A4E60A frequently asked

What is Mode-S code A4E60A?
A4E60A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4145G.
Where is Mode-S A4E60A registered?
Mode-S code A4E60A 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 A4E60A broadcasting right now?
No active broadcast right now. Last signal was 19d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4E60A, octal 51163012, decimal 10,806,794.
What flights does A4E60A operate?
Mode-S A4E60A has broadcast 1 distinct callsign, including ILU45G.