Apparatus

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sensors Mode-S transponder

A64720

ICAO 24-bit transponder address · allocated to United States

Hex
A64720
Octal
51443440
Decimal
10,897,184
Country
US
No current signal · last broadcast 11h ago
Flights observed
23
Distinct callsigns
1
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A64720.

Country allocation

The ICAO 24-bit address A64720 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
N503WY - 23 2026-06-26

Recent flights last 23

DateFlightRouteTakeoffLandingDuration
2026-06-26 N503WY - Jun 26, 21:15 UTCJun 26, 21:24 UTC10m
2026-06-25 N503WY - Jun 25, 21:29 UTCJun 25, 23:49 UTC2h 20m
2026-06-25 N503WY - Jun 25, 19:44 UTCJun 25, 20:05 UTC20m
2026-06-25 N503WY - Jun 25, 18:24 UTCJun 25, 18:39 UTC15m
2026-06-24 N503WY - Jun 24, 23:50 UTCJun 25, 00:19 UTC30m
2026-06-24 N503WY - Jun 24, 22:10 UTCJun 24, 22:35 UTC25m
2026-06-24 N503WY - Jun 24, 20:49 UTCJun 24, 21:09 UTC20m
2026-06-24 N503WY - Jun 24, 19:10 UTCJun 24, 19:29 UTC20m
2026-06-24 N503WY - Jun 24, 17:50 UTCJun 24, 17:59 UTC10m
2026-06-23 N503WY - Jun 23, 22:55 UTCJun 23, 23:10 UTC15m
2026-06-23 N503WY - Jun 23, 21:54 UTCJun 23, 22:10 UTC15m
2026-06-23 N503WY - Jun 23, 20:24 UTCJun 23, 20:40 UTC15m
2026-06-18 N503WY - Jun 18, 23:30 UTCJun 18, 23:45 UTC15m
2026-06-13 N503WY - Jun 13, 00:00 UTCJun 13, 00:35 UTC35m
2026-06-12 N503WY - Jun 12, 22:20 UTCJun 12, 22:45 UTC25m
2026-06-11 N503WY - Jun 11, 23:30 UTCJun 12, 00:55 UTC1h 25m
2026-06-11 N503WY - Jun 11, 20:50 UTCJun 11, 22:15 UTC1h 25m
2026-06-11 N503WY - Jun 11, 18:35 UTCJun 11, 20:05 UTC1h 30m
2026-06-10 N503WY - Jun 10, 00:00 UTCJun 10, 00:25 UTC25m
2026-06-09 N503WY - Jun 9, 13:45 UTCJun 9, 15:50 UTC2h 5m
2026-06-09 N503WY - Jun 9, 01:50 UTCJun 9, 03:30 UTC1h 40m
2026-06-09 N503WY - Jun 9, 00:10 UTCJun 9, 00:55 UTC45m
2026-06-08 N503WY - Jun 8, 23:25 UTCJun 8, 23:35 UTC10m

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.

Mode-S A64720 frequently asked

What is Mode-S code A64720?
A64720 is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A64720 registered?
Mode-S code A64720 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 A64720 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A64720, octal 51443440, decimal 10,897,184.
What flights does A64720 operate?
Mode-S A64720 has broadcast 1 distinct callsign, including N503WY.