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 18d ago
Flights observed
139
Distinct callsigns
2
Country
US
Last broadcast
18d 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 - 137 2026-07-26
CSTT724 - 1 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N893AF - Jul 26, 18:55 UTCJul 26, 21:00 UTC2h 5m
2026-07-24 N893AF - Jul 24, 19:10 UTCJul 24, 20:30 UTC1h 20m
2026-07-24 N893AF - Jul 24, 13:45 UTCJul 24, 14:15 UTC30m
2026-07-23 N893AF - Jul 23, 19:30 UTCJul 23, 20:30 UTC1h 0m
2026-07-23 N893AF - Jul 23, 18:15 UTCJul 23, 18:30 UTC15m
2026-07-23 N893AF - Jul 23, 14:55 UTCJul 23, 16:40 UTC1h 45m
2026-07-23 N893AF - Jul 23, 13:50 UTCJul 23, 14:50 UTC1h 0m
2026-07-22 N893AF - Jul 22, 18:50 UTCJul 22, 20:15 UTC1h 25m
2026-07-22 N893AF - Jul 22, 14:30 UTCJul 22, 15:50 UTC1h 20m
2026-07-22 N893AF - Jul 22, 02:55 UTCJul 22, 05:25 UTC2h 30m
2026-07-21 N893AF - Jul 21, 22:30 UTCJul 22, 00:05 UTC1h 35m
2026-07-21 N893AF - Jul 21, 20:20 UTCJul 21, 21:10 UTC50m
2026-07-21 N893AF - Jul 21, 17:55 UTCJul 21, 18:15 UTC20m
2026-07-21 N893AF - Jul 21, 13:00 UTCJul 21, 13:50 UTC50m
2026-07-21 N893AF - Jul 21, 03:15 UTCJul 21, 03:25 UTC10m
2026-07-21 N893AF - Jul 21, 01:05 UTCJul 21, 02:40 UTC1h 35m
2026-07-20 N893AF - Jul 20, 19:30 UTCJul 20, 21:25 UTC1h 55m
2026-07-18 N893AF - Jul 18, 13:55 UTCJul 18, 15:25 UTC1h 30m
2026-07-17 N893AF - Jul 17, 19:49 UTCJul 17, 22:05 UTC2h 15m
2026-07-17 N893AF - Jul 17, 16:04 UTCJul 17, 17:50 UTC1h 45m
2026-07-16 N893AF - Jul 16, 23:44 UTCJul 17, 00:04 UTC20m
2026-07-16 N893AF - Jul 16, 22:45 UTCJul 16, 22:59 UTC15m
2026-07-16 N893AF - Jul 16, 21:30 UTCJul 16, 21:45 UTC15m
2026-07-16 N893AF - Jul 16, 19:35 UTCJul 16, 20:09 UTC35m
2026-07-16 N893AF - Jul 16, 18:05 UTCJul 16, 18:15 UTC10m
2026-07-16 N893AF - Jul 16, 16:49 UTCJul 16, 17:05 UTC15m
2026-07-16 N893AF - Jul 16, 13:05 UTCJul 16, 14:50 UTC1h 45m
2026-07-10 N893AF - Jul 10, 17:55 UTCJul 10, 18:40 UTC45m
2026-07-10 N893AF - Jul 10, 13:35 UTCJul 10, 16:00 UTC2h 25m
2026-07-09 N893AF - Jul 9, 21:45 UTCJul 9, 22:40 UTC55m
2026-07-09 N893AF - Jul 9, 20:10 UTCJul 9, 20:20 UTC10m
2026-07-09 N893AF - Jul 9, 16:50 UTCJul 9, 18:00 UTC1h 10m
2026-07-09 N893AF - Jul 9, 14:10 UTCJul 9, 14:35 UTC25m
2026-07-09 N893AF - Jul 9, 12:50 UTCJul 9, 13:30 UTC40m
2026-07-09 N893AF - Jul 9, 02:55 UTCJul 9, 03:35 UTC40m
2026-07-09 N893AF - Jul 9, 01:30 UTCJul 9, 02:25 UTC55m
2026-07-08 N893AF - Jul 8, 18:45 UTCJul 8, 20:55 UTC2h 10m
2026-07-08 N893AF - Jul 8, 15:30 UTCJul 8, 15:45 UTC15m
2026-07-08 N893AF - Jul 8, 14:40 UTCJul 8, 14:50 UTC10m
2026-07-07 N893AF - Jul 7, 19:55 UTCJul 7, 21:35 UTC1h 40m
2026-07-07 N893AF - Jul 7, 17:00 UTCJul 7, 17:55 UTC55m
2026-07-07 N893AF - Jul 7, 15:30 UTCJul 7, 15:45 UTC15m
2026-07-07 N893AF - Jul 7, 13:45 UTCJul 7, 14:30 UTC45m
2026-07-07 N893AF - Jul 7, 01:55 UTCJul 7, 03:15 UTC1h 20m
2026-07-06 N893AF - Jul 6, 15:30 UTCJul 6, 16:15 UTC45m
2026-07-06 N893AF - Jul 6, 12:10 UTCJul 6, 14:35 UTC2h 25m
2026-07-05 N893AF - Jul 5, 21:10 UTCJul 5, 22:45 UTC1h 35m
2026-07-04 N893AF - Jul 4, 16:30 UTCJul 4, 18:50 UTC2h 20m
2026-07-04 N893AF - Jul 4, 01:35 UTCJul 4, 03:30 UTC1h 55m
2026-07-03 N893AF - Jul 3, 21:20 UTCJul 3, 22:45 UTC1h 25m

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 18d 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.