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sensors Mode-S transponder

ACF1A3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N933JN · EMBRAER ERJ-145 · operated by AMERICAN AIRLINES INC

Hex
ACF1A3
Octal
53170643
Decimal
11,334,051
Country
US
Tail
N933JN
Type
E145
Broadcasting now · callsign PDT6046 · 6,975 ft
Flights observed
806
Distinct callsigns
20
Country
US
Last broadcast
3h ago

Current position

ACF1A3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ACF1A3 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 20 distinct

Callsign Airline Flights Last seen
PDT6124 Piedmont Airlines 13 2026-05-06
PDT5785 Piedmont Airlines 13 2026-06-09
PDT6062 - 11 2026-07-05
PDT6128 - 10 2026-07-05
PDT5955 - 10 2026-07-13
PDT6000 - 9 2026-07-14
PDT5918 Piedmont Airlines 9 2026-05-29
PDT5913 - 9 2026-07-11
PDT5817 - 9 2026-07-11
PDT5807 - 9 2026-07-04
PDT5806 - 9 2026-07-13
PDT5796 Piedmont Airlines 9 2026-06-27
PDT6113 Piedmont Airlines 8 2026-06-30
PDT5828 Piedmont Airlines 8 2026-06-13
PDT5811 - 8 2026-07-08
PDT6034 - 7 2026-06-20
PDT6013 Piedmont Airlines 7 2026-06-22
PDT5994 - 7 2026-07-11
PDT5946 - 7 2026-06-17
PDT5841 Piedmont Airlines 7 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PDT6000 - Jul 14, 16:20 UTCJul 14, 17:20 UTC1h 0m
2026-07-14 PDT6000 - Jul 14, 14:10 UTCJul 14, 15:10 UTC1h 0m
2026-07-14 PDT5967 - Jul 14, 10:50 UTCJul 14, 11:45 UTC55m
2026-07-14 PDT5865 - Jul 14, 03:35 UTCJul 14, 04:30 UTC55m
2026-07-14 PDT5865 CLT → MGM Jul 14, 03:34 UTCJul 14, 04:43 UTC1h 9m
2026-07-14 PDT5804 - Jul 14, 01:05 UTCJul 14, 01:50 UTC45m
2026-07-13 PDT5804 - Jul 13, 23:20 UTCJul 13, 23:50 UTC30m
2026-07-13 PDT5806 - Jul 13, 19:45 UTCJul 13, 20:55 UTC1h 10m
2026-07-13 PDT5806 HSV → CLT Jul 13, 19:45 UTCJul 13, 20:52 UTC1h 7m
2026-07-13 PDT5806 - Jul 13, 17:50 UTCJul 13, 18:50 UTC1h 0m
2026-07-13 PDT5898 - Jul 13, 15:35 UTCJul 13, 16:20 UTC45m
2026-07-13 PDT5898 - Jul 13, 14:10 UTCJul 13, 14:40 UTC30m
2026-07-13 PDT5955 - Jul 13, 10:30 UTCJul 13, 11:10 UTC40m
2026-07-13 PDT5971 - Jul 13, 03:15 UTCJul 13, 03:40 UTC25m
2026-07-13 PDT6043 - Jul 13, 01:35 UTCJul 13, 02:01 UTC25m
2026-07-13 PDT6043 - Jul 13, 00:30 UTCJul 13, 00:50 UTC20m
2026-07-12 PDT5889 - Jul 12, 22:25 UTCJul 12, 23:00 UTC35m
2026-07-12 PDT5889 - Jul 12, 20:50 UTCJul 12, 21:30 UTC40m
2026-07-12 PDT6086 - Jul 12, 17:50 UTCJul 12, 19:30 UTC1h 40m
2026-07-12 PDT9980 - Jul 12, 15:15 UTCJul 12, 17:01 UTC1h 45m
2026-07-12 PDT5964 PHL → RIC Jul 12, 01:04 UTCJul 12, 01:56 UTC52m
2026-07-12 PDT5964 - Jul 12, 01:05 UTCJul 12, 01:45 UTC40m
2026-07-11 PDT5794 - Jul 11, 22:05 UTCJul 11, 22:55 UTC50m
2026-07-11 PDT5794 - Jul 11, 20:05 UTCJul 11, 21:15 UTC1h 10m
2026-07-11 PDT6115 - Jul 11, 17:05 UTCJul 11, 18:20 UTC1h 15m
2026-07-11 PDT5994 - Jul 11, 15:40 UTCJul 11, 15:55 UTC15m
2026-07-11 PDT5817 - Jul 11, 12:55 UTCJul 11, 13:30 UTC35m
2026-07-11 PDT5817 CHS → CLT Jul 11, 12:54 UTCJul 11, 13:29 UTC35m
2026-07-11 PDT5817 - Jul 11, 11:30 UTCJul 11, 12:10 UTC40m
2026-07-11 PDT5842 - Jul 11, 09:15 UTCJul 11, 09:55 UTC40m
2026-07-11 PDT5842 LYH → CLT Jul 11, 09:15 UTCJul 11, 09:54 UTC39m
2026-07-11 PDT5913 - Jul 11, 03:45 UTCJul 11, 04:15 UTC30m
2026-07-11 PDT6049 - Jul 11, 01:15 UTCJul 11, 02:05 UTC50m
2026-07-10 PDT6049 - Jul 10, 23:15 UTCJul 10, 23:55 UTC40m
2026-07-10 PDT5831 - Jul 10, 21:10 UTCJul 10, 21:45 UTC35m
2026-07-10 PDT5831 TYS → CLT Jul 10, 21:07 UTCJul 10, 21:46 UTC39m
2026-07-10 PDT5831 - Jul 10, 19:40 UTCJul 10, 20:20 UTC40m
2026-07-10 PDT6000 - Jul 10, 16:15 UTCJul 10, 17:15 UTC1h 0m
2026-07-10 PDT6000 TLH → CLT Jul 10, 16:09 UTCJul 10, 17:12 UTC1h 3m
2026-07-10 PDT6000 - Jul 10, 14:15 UTCJul 10, 15:15 UTC1h 0m
2026-07-10 PDT6098 - Jul 10, 10:55 UTCJul 10, 11:45 UTC50m
2026-07-10 PDT6015 - Jul 10, 01:15 UTCJul 10, 01:45 UTC30m
2026-07-09 PDT6032 - Jul 9, 23:40 UTCJul 10, 00:00 UTC20m
2026-07-09 PDT6032 - Jul 9, 22:30 UTCJul 9, 22:50 UTC20m
2026-07-09 PDT6046 - Jul 9, 20:30 UTCJul 9, 20:55 UTC25m
2026-07-09 PDT6046 - Jul 9, 19:20 UTCJul 9, 19:35 UTC15m
2026-07-09 PDT6129 - Jul 9, 16:10 UTCJul 9, 17:15 UTC1h 5m
2026-07-09 PDT6129 FWA → CLT Jul 9, 16:05 UTCJul 9, 17:13 UTC1h 8m
2026-07-09 PDT6129 - Jul 9, 14:00 UTCJul 9, 15:00 UTC1h 0m
2026-07-09 PDT6087 - Jul 9, 10:40 UTCJul 9, 12:00 UTC1h 20m

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 N933JN page for operator, model, and routing details .

Mode-S ACF1A3 frequently asked

What is Mode-S code ACF1A3?
ACF1A3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N933JN.
Where is Mode-S ACF1A3 registered?
Mode-S code ACF1A3 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 ACF1A3 broadcasting right now?
Yes. Mode-S ACF1A3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACF1A3, octal 53170643, decimal 11,334,051.
What flights does ACF1A3 operate?
Mode-S ACF1A3 has broadcast 20 distinct callsigns, including PDT6124, PDT5785, PDT6062, PDT6128, PDT5955.