Apparatus

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sensors Mode-S transponder

AC507F

ICAO 24-bit transponder address · allocated to United States

Hex
AC507F
Octal
53050177
Decimal
11,292,799
Country
US
No current signal · last broadcast 5h ago
Flights observed
72
Distinct callsigns
2
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S AC507F.

Country allocation

The ICAO 24-bit address AC507F 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 2 distinct

Callsign Airline Flights Last seen
N893AF - 70 2026-06-29
CSTT724 - 1 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-29 N893AF - Jun 29, 20:54 UTCJun 29, 21:09 UTC15m
2026-06-29 N893AF - Jun 29, 19:09 UTCJun 29, 19:20 UTC10m
2026-06-28 N893AF - Jun 28, 17:50 UTCJun 28, 18:14 UTC25m
2026-06-27 N893AF - Jun 27, 21:50 UTCJun 27, 23:39 UTC1h 50m
2026-06-27 N893AF - Jun 27, 18:49 UTCJun 27, 20:55 UTC2h 5m
2026-06-27 N893AF - Jun 27, 17:34 UTCJun 27, 17:44 UTC10m
2026-06-27 N893AF - Jun 27, 15:39 UTCJun 27, 15:49 UTC10m
2026-06-27 N893AF - Jun 27, 02:39 UTCJun 27, 03:34 UTC55m
2026-06-27 N893AF - Jun 27, 00:50 UTCJun 27, 01:19 UTC30m
2026-06-26 N893AF - Jun 26, 17:00 UTCJun 26, 17:09 UTC10m
2026-06-26 N893AF - Jun 26, 15:29 UTCJun 26, 15:45 UTC15m
2026-06-26 N893AF - Jun 26, 13:55 UTCJun 26, 14:35 UTC40m
2026-06-26 N893AF - Jun 26, 02:09 UTCJun 26, 02:34 UTC25m
2026-06-26 N893AF - Jun 26, 00:35 UTCJun 26, 00:55 UTC20m
2026-06-25 N893AF - Jun 25, 21:10 UTCJun 25, 21:20 UTC10m
2026-06-25 N893AF - Jun 25, 18:04 UTCJun 25, 19:15 UTC1h 10m
2026-06-25 N893AF - Jun 25, 16:14 UTCJun 25, 16:45 UTC30m
2026-06-25 N893AF - Jun 25, 14:55 UTCJun 25, 15:04 UTC10m
2026-06-24 N893AF - Jun 24, 22:29 UTCJun 24, 22:49 UTC20m
2026-06-24 N893AF - Jun 24, 21:14 UTCJun 24, 21:50 UTC35m
2026-06-24 N893AF - Jun 24, 01:49 UTCJun 24, 04:00 UTC2h 10m
2026-06-23 N893AF - Jun 23, 21:24 UTCJun 23, 23:00 UTC1h 35m
2026-06-23 N893AF - Jun 23, 18:34 UTCJun 23, 18:45 UTC10m
2026-06-20 N893AF - Jun 20, 21:05 UTCJun 20, 21:14 UTC10m
2026-06-20 N893AF - Jun 20, 15:14 UTCJun 20, 16:29 UTC1h 15m
2026-06-19 N893AF - Jun 19, 15:49 UTCJun 19, 17:29 UTC1h 40m
2026-06-17 N893AF - Jun 17, 21:05 UTCJun 17, 22:50 UTC1h 45m
2026-06-17 N893AF - Jun 17, 18:25 UTCJun 17, 19:30 UTC1h 5m
2026-06-17 N893AF - Jun 17, 01:45 UTCJun 17, 01:55 UTC10m
2026-06-16 N893AF - Jun 16, 23:35 UTCJun 17, 00:55 UTC1h 20m
2026-06-14 N893AF - Jun 14, 16:10 UTCJun 14, 16:20 UTC10m
2026-06-14 N893AF - Jun 14, 14:40 UTCJun 14, 14:50 UTC10m
2026-06-13 N893AF - Jun 13, 18:10 UTCJun 13, 19:45 UTC1h 35m
2026-06-13 N893AF - Jun 13, 03:25 UTCJun 13, 05:15 UTC1h 49m
2026-06-13 N893AF - Jun 13, 00:50 UTCJun 13, 02:30 UTC1h 40m
2026-06-12 N893AF - Jun 12, 19:10 UTCJun 12, 19:50 UTC40m
2026-06-12 N893AF - Jun 12, 18:01 UTCJun 12, 18:20 UTC20m
2026-06-12 N893AF - Jun 12, 00:15 UTCJun 12, 00:40 UTC26m
2026-06-11 N893AF - Jun 11, 22:25 UTCJun 11, 22:45 UTC20m
2026-06-11 N893AF - Jun 11, 21:20 UTCJun 11, 21:50 UTC30m
2026-06-11 N893AF - Jun 11, 19:30 UTCJun 11, 19:50 UTC20m
2026-06-11 N893AF - Jun 11, 17:55 UTCJun 11, 18:25 UTC30m
2026-06-11 N893AF - Jun 11, 15:10 UTCJun 11, 16:40 UTC1h 30m
2026-06-10 N893AF - Jun 10, 18:25 UTCJun 10, 18:50 UTC25m
2026-06-10 N893AF - Jun 10, 16:50 UTCJun 10, 17:10 UTC20m
2026-06-10 N893AF - Jun 10, 00:50 UTCJun 10, 01:00 UTC10m
2026-06-09 N893AF - Jun 9, 22:00 UTCJun 9, 22:40 UTC40m
2026-06-09 N893AF - Jun 9, 20:55 UTCJun 9, 21:20 UTC25m
2026-06-09 N893AF - Jun 9, 19:10 UTCJun 9, 19:45 UTC35m
2026-06-09 N893AF - Jun 9, 17:40 UTCJun 9, 18:20 UTC40m

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 AC507F frequently asked

What is Mode-S code AC507F?
AC507F is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S AC507F registered?
Mode-S code AC507F 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 AC507F broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC507F, octal 53050177, decimal 11,292,799.
What flights does AC507F operate?
Mode-S AC507F has broadcast 2 distinct callsigns, including N893AF, CSTT724.