Apparatus

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sensors Mode-S transponder

A624D1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N495Y · BEECH 90 King Air · operated by EAGLEMED LLC

Hex
A624D1
Octal
51422321
Decimal
10,888,401
Country
US
Tail
N495Y
Type
BE9L
No current signal · last broadcast 3h ago
Flights observed
175
Distinct callsigns
4
Country
US
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S A624D1.

Country allocation

The ICAO 24-bit address A624D1 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 4 distinct

Callsign Airline Flights Last seen
EMD4 - 169 2026-07-17
EMD8 - 3 2026-07-11
EMD23 - 2 2026-07-18
N495Y - 1 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 EMD23 - Jul 18, 09:35 UTCJul 18, 10:05 UTC30m
2026-07-18 EMD23 - Jul 18, 07:50 UTCJul 18, 08:10 UTC20m
2026-07-17 EMD4 - Jul 17, 05:45 UTCJul 17, 06:45 UTC1h 0m
2026-07-17 EMD4 - Jul 17, 03:10 UTCJul 17, 03:59 UTC50m
2026-07-16 EMD4 - Jul 16, 03:55 UTCJul 16, 04:55 UTC1h 0m
2026-07-16 EMD4 - Jul 16, 01:10 UTCJul 16, 02:05 UTC55m
2026-07-14 EMD4 - Jul 14, 21:25 UTCJul 14, 21:45 UTC20m
2026-07-14 EMD4 - Jul 14, 19:10 UTCJul 14, 19:35 UTC25m
2026-07-14 EMD4 - Jul 14, 12:45 UTCJul 14, 13:45 UTC1h 0m
2026-07-14 EMD4 - Jul 14, 10:20 UTCJul 14, 11:15 UTC55m
2026-07-13 EMD4 - Jul 13, 22:55 UTCJul 13, 23:25 UTC30m
2026-07-13 EMD4 - Jul 13, 20:55 UTCJul 13, 21:20 UTC25m
2026-07-13 EMD4 - Jul 13, 01:35 UTCJul 13, 02:01 UTC25m
2026-07-12 EMD4 - Jul 12, 23:50 UTCJul 13, 00:10 UTC20m
2026-07-12 EMD4 - Jul 12, 01:05 UTCJul 12, 01:25 UTC20m
2026-07-11 EMD4 - Jul 11, 23:30 UTCJul 11, 23:40 UTC10m
2026-07-11 EMD8 - Jul 11, 17:20 UTCJul 11, 17:40 UTC20m
2026-07-05 EMD4 - Jul 5, 22:25 UTCJul 5, 22:35 UTC10m
2026-07-02 EMD4 - Jul 2, 23:10 UTCJul 2, 23:25 UTC15m
2026-07-02 EMD4 - Jul 2, 21:15 UTCJul 2, 21:25 UTC10m
2026-07-02 EMD4 - Jul 2, 00:55 UTCJul 2, 01:10 UTC15m
2026-07-01 EMD4 - Jul 1, 23:10 UTCJul 1, 23:20 UTC10m
2026-07-01 EMD4 - Jul 1, 13:45 UTCJul 1, 14:05 UTC20m
2026-07-01 EMD4 - Jul 1, 10:40 UTCJul 1, 11:05 UTC25m
2026-07-01 EMD4 - Jul 1, 03:05 UTCJul 1, 03:45 UTC40m
2026-06-30 EMD4 - Jun 30, 11:10 UTCJun 30, 11:35 UTC25m
2026-06-30 EMD4 - Jun 30, 05:40 UTCJun 30, 06:05 UTC25m
2026-06-29 EMD4 - Jun 29, 21:30 UTCJun 29, 22:30 UTC1h 0m
2026-06-29 EMD4 - Jun 29, 18:49 UTCJun 29, 19:35 UTC45m
2026-06-28 EMD4 - Jun 28, 18:34 UTCJun 28, 19:14 UTC40m
2026-06-28 EMD4 - Jun 28, 15:49 UTCJun 28, 16:19 UTC30m
2026-06-28 EMD4 - Jun 28, 06:49 UTCJun 28, 07:20 UTC30m
2026-06-28 EMD4 - Jun 28, 04:55 UTCJun 28, 05:20 UTC25m
2026-06-26 EMD4 - Jun 26, 13:04 UTCJun 26, 13:49 UTC45m
2026-06-26 EMD4 - Jun 26, 09:05 UTCJun 26, 09:30 UTC25m
2026-06-25 EMD4 - Jun 25, 21:35 UTCJun 25, 21:59 UTC25m
2026-06-25 EMD4 - Jun 25, 19:39 UTCJun 25, 19:54 UTC15m
2026-06-23 EMD4 - Jun 23, 07:35 UTCJun 23, 08:00 UTC25m
2026-06-23 EMD4 - Jun 23, 05:45 UTCJun 23, 06:04 UTC20m
2026-06-23 EMD4 - Jun 23, 01:25 UTCJun 23, 02:34 UTC1h 10m
2026-06-22 EMD4 - Jun 22, 22:40 UTCJun 22, 23:45 UTC1h 5m
2026-06-22 EMD4 - Jun 22, 19:54 UTCJun 22, 20:10 UTC15m
2026-06-21 EMD4 - Jun 21, 21:05 UTCJun 21, 22:20 UTC1h 15m
2026-06-21 EMD4 - Jun 21, 18:39 UTCJun 21, 19:29 UTC50m
2026-06-20 EMD4 - Jun 20, 21:25 UTCJun 20, 22:39 UTC1h 15m
2026-06-20 EMD4 - Jun 20, 17:34 UTCJun 20, 18:24 UTC50m
2026-06-20 EMD4 - Jun 20, 11:40 UTCJun 20, 11:59 UTC20m
2026-06-20 EMD4 - Jun 20, 08:55 UTCJun 20, 09:14 UTC20m
2026-06-19 EMD4 - Jun 19, 20:44 UTCJun 19, 21:09 UTC25m
2026-06-19 EMD4 - Jun 19, 18:49 UTCJun 19, 19:09 UTC20m

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 N495Y page for operator, model, and routing details .

Mode-S A624D1 frequently asked

What is Mode-S code A624D1?
A624D1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N495Y.
Where is Mode-S A624D1 registered?
Mode-S code A624D1 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 A624D1 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A624D1, octal 51422321, decimal 10,888,401.
What flights does A624D1 operate?
Mode-S A624D1 has broadcast 4 distinct callsigns, including EMD4, EMD8, EMD23, N495Y.