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sensors Mode-S transponder

AC4716

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N890U · operated by BOARD OF REGENTS OF THE UNIVERSITY OF OKLAHOMA

Hex
AC4716
Octal
53043426
Decimal
11,290,390
Country
US
Tail
N890U
Type
P28A
Broadcasting now · callsign OUA27 · 1,525 ft
Flights observed
103
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 18:45 UTC

Current position

AC4716 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC4716 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
OUA27 - 103 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 OUA27 - Jul 25, 17:35 UTCJul 25, 18:45 UTC1h 10m
2026-07-25 OUA27 - Jul 25, 14:25 UTCJul 25, 15:35 UTC1h 10m
2026-07-23 OUA27 - Jul 23, 17:25 UTCJul 23, 18:00 UTC35m
2026-07-23 OUA27 - Jul 23, 14:30 UTCJul 23, 15:30 UTC1h 0m
2026-07-22 OUA27 - Jul 22, 17:30 UTCJul 22, 18:15 UTC45m
2026-07-22 OUA27 - Jul 22, 14:05 UTCJul 22, 15:20 UTC1h 15m
2026-07-21 OUA27 - Jul 21, 16:25 UTCJul 21, 17:30 UTC1h 5m
2026-07-19 OUA27 - Jul 19, 17:50 UTCJul 19, 19:20 UTC1h 30m
2026-07-19 OUA27 - Jul 19, 16:05 UTCJul 19, 16:55 UTC50m
2026-07-18 OUA27 - Jul 18, 18:40 UTCJul 18, 19:10 UTC30m
2026-07-18 OUA27 - Jul 18, 16:15 UTCJul 18, 17:05 UTC50m
2026-07-17 OUA27 - Jul 17, 19:40 UTCJul 17, 21:05 UTC1h 25m
2026-07-10 OUA27 - Jul 10, 16:20 UTCJul 10, 17:50 UTC1h 30m
2026-07-09 OUA27 - Jul 9, 19:45 UTCJul 9, 20:45 UTC1h 0m
2026-07-09 OUA27 - Jul 9, 17:45 UTCJul 9, 19:10 UTC1h 25m
2026-07-09 OUA27 - Jul 9, 14:15 UTCJul 9, 16:00 UTC1h 45m
2026-07-09 OUA27 - Jul 9, 02:30 UTCJul 9, 04:30 UTC2h 0m
2026-07-09 OUA27 - Jul 9, 00:30 UTCJul 9, 01:35 UTC1h 5m
2026-07-08 OUA27 - Jul 8, 23:00 UTCJul 8, 23:45 UTC45m
2026-07-08 OUA27 - Jul 8, 21:35 UTCJul 8, 22:15 UTC40m
2026-07-08 OUA27 - Jul 8, 19:40 UTCJul 8, 20:40 UTC1h 0m
2026-07-08 OUA27 - Jul 8, 17:10 UTCJul 8, 18:50 UTC1h 40m
2026-07-08 OUA27 - Jul 8, 13:05 UTCJul 8, 14:40 UTC1h 35m
2026-07-08 OUA27 - Jul 8, 02:35 UTCJul 8, 03:15 UTC40m
2026-07-07 OUA27 - Jul 7, 23:25 UTCJul 8, 00:25 UTC1h 0m
2026-07-07 OUA27 - Jul 7, 19:35 UTCJul 7, 21:00 UTC1h 25m
2026-07-07 OUA27 - Jul 7, 17:50 UTCJul 7, 18:25 UTC35m
2026-07-07 OUA27 - Jul 7, 01:05 UTCJul 7, 02:05 UTC1h 0m
2026-07-06 OUA27 - Jul 6, 22:00 UTCJul 6, 22:35 UTC35m
2026-07-06 OUA27 - Jul 6, 20:35 UTCJul 6, 21:00 UTC25m
2026-07-06 OUA27 - Jul 6, 18:00 UTCJul 6, 19:25 UTC1h 25m
2026-07-06 OUA27 - Jul 6, 15:45 UTCJul 6, 16:30 UTC45m
2026-07-06 OUA27 - Jul 6, 00:35 UTCJul 6, 01:40 UTC1h 5m
2026-07-05 OUA27 - Jul 5, 21:15 UTCJul 5, 22:25 UTC1h 10m
2026-07-04 OUA27 - Jul 4, 01:45 UTCJul 4, 02:20 UTC35m
2026-07-03 OUA27 - Jul 3, 21:05 UTCJul 3, 21:45 UTC40m
2026-07-03 OUA27 - Jul 3, 17:30 UTCJul 3, 19:05 UTC1h 35m
2026-07-03 OUA27 - Jul 3, 13:40 UTCJul 3, 14:05 UTC25m
2026-07-03 OUA27 - Jul 3, 02:45 UTCJul 3, 03:20 UTC35m
2026-07-02 OUA27 - Jul 2, 22:45 UTCJul 2, 23:30 UTC45m
2026-07-02 OUA27 - Jul 2, 21:15 UTCJul 2, 22:00 UTC45m
2026-07-02 OUA27 - Jul 2, 19:55 UTCJul 2, 20:30 UTC35m
2026-07-02 OUA27 - Jul 2, 17:55 UTCJul 2, 19:00 UTC1h 5m
2026-07-02 OUA27 - Jul 2, 13:55 UTCJul 2, 16:30 UTC2h 35m
2026-07-02 OUA27 - Jul 2, 02:30 UTCJul 2, 04:10 UTC1h 40m
2026-07-01 OUA27 - Jul 1, 23:10 UTCJul 2, 00:45 UTC1h 35m
2026-07-01 OUA27 - Jul 1, 21:10 UTCJul 1, 21:55 UTC45m
2026-07-01 OUA27 - Jul 1, 19:25 UTCJul 1, 20:10 UTC45m
2026-07-01 OUA27 - Jul 1, 17:45 UTCJul 1, 18:45 UTC1h 0m
2026-07-01 OUA27 - Jul 1, 16:35 UTCJul 1, 16:55 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 N890U page for operator, model, and routing details .

Mode-S AC4716 frequently asked

What is Mode-S code AC4716?
AC4716 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N890U.
Where is Mode-S AC4716 registered?
Mode-S code AC4716 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 AC4716 broadcasting right now?
Yes. Mode-S AC4716 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC4716, octal 53043426, decimal 11,290,390.
What flights does AC4716 operate?
Mode-S AC4716 has broadcast 1 distinct callsign, including OUA27.