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sensors Mode-S transponder

A619EF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4920S · CESSNA 182 Skylane · operated by EXECUTIVE FLYERS INC

Hex
A619EF
Octal
51414757
Decimal
10,885,615
Country
US
Tail
N4920S
Type
C182
Transponder active on ground
Flights observed
104
Distinct callsigns
1
Country
US
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S A619EF.

Country allocation

The ICAO 24-bit address A619EF 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
N4920S - 104 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 N4920S - Jul 20, 22:00 UTCJul 20, 22:15 UTC15m
2026-07-20 N4920S - Jul 20, 21:30 UTCJul 20, 21:50 UTC20m
2026-07-20 N4920S - Jul 20, 20:45 UTCJul 20, 21:15 UTC30m
2026-07-19 N4920S - Jul 19, 01:10 UTCJul 19, 02:30 UTC1h 20m
2026-07-18 N4920S SAC → SAC Jul 18, 01:54 UTCJul 18, 02:09 UTC15m
2026-07-16 N4920S - Jul 16, 18:34 UTCJul 16, 19:14 UTC40m
2026-07-16 N4920S - Jul 16, 17:05 UTCJul 16, 17:40 UTC35m
2026-07-15 N4920S - Jul 15, 23:10 UTCJul 15, 23:30 UTC20m
2026-07-15 N4920S SAC → APC Jul 15, 22:10 UTCJul 15, 22:45 UTC35m
2026-07-15 N4920S - Jul 15, 00:45 UTCJul 15, 01:05 UTC20m
2026-07-14 N4920S SAC → APC Jul 14, 23:05 UTCJul 15, 00:05 UTC1h 0m
2026-07-14 N4920S - Jul 14, 16:45 UTCJul 14, 16:55 UTC10m
2026-07-14 N4920S - Jul 14, 16:05 UTCJul 14, 16:30 UTC25m
2026-07-12 N4920S SAC → SAC Jul 12, 18:55 UTCJul 12, 19:55 UTC1h 0m
2026-06-22 N4920S SAC → SAC Jun 22, 18:15 UTCJun 22, 20:04 UTC1h 50m
2026-06-20 N4920S - Jun 20, 18:59 UTCJun 20, 19:40 UTC40m
2026-06-20 N4920S - Jun 20, 17:14 UTCJun 20, 18:19 UTC1h 5m
2026-06-19 N4920S SAC → SAC Jun 19, 18:54 UTCJun 19, 19:34 UTC40m
2026-06-19 N4920S - Jun 19, 00:49 UTCJun 19, 00:59 UTC10m
2026-06-18 N4920S - Jun 18, 23:35 UTCJun 19, 00:05 UTC30m
2026-06-18 N4920S - Jun 18, 21:15 UTCJun 18, 22:00 UTC45m
2026-06-18 N4920S - Jun 18, 16:30 UTCJun 18, 17:30 UTC1h 0m
2026-06-17 N4920S - Jun 17, 23:25 UTCJun 17, 23:50 UTC25m
2026-06-17 N4920S - Jun 17, 23:10 UTCJun 17, 23:20 UTC10m
2026-06-17 N4920S - Jun 17, 22:25 UTCJun 17, 23:05 UTC40m
2026-06-17 N4920S SAC → SAC Jun 17, 03:50 UTCJun 17, 05:10 UTC1h 20m
2026-06-16 N4920S - Jun 16, 23:45 UTCJun 17, 00:10 UTC25m
2026-06-16 N4920S - Jun 16, 23:30 UTCJun 16, 23:40 UTC10m
2026-06-16 N4920S - Jun 16, 23:05 UTCJun 16, 23:25 UTC20m
2026-06-16 N4920S - Jun 16, 15:45 UTCJun 16, 16:55 UTC1h 10m
2026-06-15 N4920S - Jun 15, 19:10 UTCJun 15, 19:20 UTC10m
2026-06-15 N4920S - Jun 15, 18:10 UTCJun 15, 19:05 UTC55m
2026-06-14 N4920S - Jun 14, 19:25 UTCJun 14, 20:25 UTC1h 0m
2026-06-14 N4920S SAC → RDD Jun 14, 17:40 UTCJun 14, 18:45 UTC1h 5m
2026-06-14 N4920S BFL → SAC Jun 14, 00:50 UTCJun 14, 02:40 UTC1h 50m
2026-06-13 N4920S SAC → BFL Jun 13, 22:10 UTCJun 14, 00:00 UTC1h 50m
2026-06-13 N4920S - Jun 13, 19:55 UTCJun 13, 20:20 UTC25m
2026-06-13 N4920S - Jun 13, 19:15 UTCJun 13, 19:50 UTC35m
2026-06-12 N4920S SAC → SAC Jun 12, 17:45 UTCJun 12, 19:30 UTC1h 45m
2026-06-11 N4920S - Jun 11, 22:50 UTCJun 11, 23:35 UTC45m
2026-06-11 N4920S - Jun 11, 21:40 UTCJun 11, 22:45 UTC1h 5m
2026-06-10 N4920S APC → SAC Jun 10, 22:10 UTCJun 10, 22:35 UTC25m
2026-06-10 N4920S SAC → APC Jun 10, 21:05 UTCJun 10, 21:30 UTC25m
2026-06-10 N4920S - Jun 10, 18:10 UTCJun 10, 19:10 UTC1h 0m
2026-06-09 N4920S SAC → MHR Jun 9, 21:10 UTCJun 9, 22:50 UTC1h 40m
2026-06-09 N4920S - Jun 9, 18:25 UTCJun 9, 19:25 UTC1h 0m
2026-06-09 N4920S - Jun 9, 16:50 UTCJun 9, 17:45 UTC55m
2026-06-08 N4920S - Jun 8, 21:35 UTCJun 8, 21:50 UTC15m
2026-06-08 N4920S - Jun 8, 20:55 UTCJun 8, 21:30 UTC35m
2026-06-08 N4920S SAC → MHR Jun 8, 18:05 UTCJun 8, 18:40 UTC35m

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 N4920S page for operator, model, and routing details .

Mode-S A619EF frequently asked

What is Mode-S code A619EF?
A619EF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4920S.
Where is Mode-S A619EF registered?
Mode-S code A619EF 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 A619EF broadcasting right now?
Mode-S A619EF is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A619EF, octal 51414757, decimal 10,885,615.
What flights does A619EF operate?
Mode-S A619EF has broadcast 1 distinct callsign, including N4920S.