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sensors Mode-S transponder

A50ACC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N424DF · GRUMMAN S-2 Tracker · operated by USDA FOREST SERVICE FEPP, CALIFORNIA DEPARTMENT OF FORESTRY AND FIRE, PROTECTION

Hex
A50ACC
Octal
51205314
Decimal
10,816,204
Country
US
Tail
N424DF
Type
S2P
No current signal · last broadcast 1d ago
Flights observed
79
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A50ACC.

Country allocation

The ICAO 24-bit address A50ACC 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
CFR83 - 78 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 CFR83 - Jul 12, 23:55 UTCJul 13, 00:20 UTC25m
2026-07-12 CFR83 - Jul 12, 03:20 UTCJul 12, 03:40 UTC20m
2026-07-11 CFR83 - Jul 11, 23:00 UTCJul 12, 00:55 UTC1h 55m
2026-07-11 CFR83 - Jul 11, 20:55 UTCJul 11, 21:15 UTC20m
2026-07-11 CFR83 - Jul 11, 19:25 UTCJul 11, 19:45 UTC20m
2026-07-10 CFR83 - Jul 10, 23:40 UTCJul 11, 00:00 UTC20m
2026-07-10 CFR83 - Jul 10, 21:05 UTCJul 10, 21:40 UTC35m
2026-07-10 CFR83 - Jul 10, 18:50 UTCJul 10, 19:50 UTC1h 0m
2026-07-08 CFR83 - Jul 8, 21:35 UTCJul 8, 23:15 UTC1h 40m
2026-07-08 CFR83 - Jul 8, 00:00 UTCJul 8, 00:45 UTC45m
2026-07-07 CFR83 - Jul 7, 02:45 UTCJul 7, 02:55 UTC10m
2026-07-07 CFR83 - Jul 7, 01:45 UTCJul 7, 02:05 UTC20m
2026-07-06 CFR83 - Jul 6, 21:40 UTCJul 6, 23:05 UTC1h 25m
2026-07-06 CFR83 - Jul 6, 20:20 UTCJul 6, 20:35 UTC15m
2026-07-04 CFR83 - Jul 4, 19:45 UTCJul 4, 21:05 UTC1h 20m
2026-07-03 CFR83 - Jul 3, 20:20 UTCJul 3, 20:30 UTC10m
2026-07-02 - - Jul 2, 00:40 UTCJul 2, 00:55 UTC15m
2026-07-01 CFR83 - Jul 1, 20:15 UTCJul 1, 20:25 UTC10m
2026-07-01 CFR83 - Jul 1, 17:20 UTCJul 1, 19:30 UTC2h 10m
2026-06-30 CFR83 - Jun 30, 22:35 UTCJun 30, 23:10 UTC35m
2026-06-30 CFR83 - Jun 30, 17:25 UTCJun 30, 18:35 UTC1h 10m
2026-06-29 CFR83 - Jun 29, 00:05 UTCJun 29, 00:24 UTC20m
2026-06-26 CFR83 - Jun 26, 23:44 UTCJun 27, 00:05 UTC20m
2026-06-26 CFR83 - Jun 26, 20:24 UTCJun 26, 20:34 UTC10m
2026-06-26 CFR83 - Jun 26, 18:09 UTCJun 26, 19:14 UTC1h 5m
2026-06-24 CFR83 - Jun 24, 20:40 UTCJun 24, 20:49 UTC10m
2026-06-23 CFR83 - Jun 23, 23:55 UTCJun 24, 00:15 UTC20m
2026-06-23 CFR83 - Jun 23, 22:05 UTCJun 23, 22:19 UTC15m
2026-06-23 CFR83 - Jun 23, 21:14 UTCJun 23, 21:24 UTC10m
2026-06-19 CFR83 - Jun 19, 00:49 UTCJun 19, 01:15 UTC25m
2026-06-18 CFR83 - Jun 18, 22:30 UTCJun 18, 22:45 UTC15m
2026-06-16 CFR83 - Jun 16, 00:05 UTCJun 16, 01:45 UTC1h 40m
2026-06-15 CFR83 - Jun 15, 20:15 UTCJun 15, 20:34 UTC20m
2026-06-15 CFR83 COA → MCC Jun 15, 16:35 UTCJun 15, 16:55 UTC20m
2026-06-14 CFR83 - Jun 14, 23:15 UTCJun 14, 23:50 UTC35m
2026-06-14 CFR83 - Jun 14, 21:10 UTCJun 14, 21:20 UTC10m
2026-06-13 CFR83 - Jun 13, 22:10 UTCJun 13, 23:05 UTC55m
2026-06-13 CFR83 - Jun 13, 19:55 UTCJun 13, 20:05 UTC10m
2026-06-12 CFR83 - Jun 12, 19:00 UTCJun 12, 19:10 UTC10m
2026-06-11 CFR83 - Jun 11, 00:45 UTCJun 11, 02:20 UTC1h 35m
2026-06-10 CFR83 - Jun 10, 18:20 UTCJun 10, 19:35 UTC1h 15m
2026-06-08 CFR83 - Jun 8, 00:15 UTCJun 8, 00:30 UTC15m
2026-06-05 CFR83 - Jun 5, 22:45 UTCJun 5, 23:45 UTC1h 0m
2026-06-05 CFR83 - Jun 5, 20:10 UTCJun 5, 21:40 UTC1h 30m
2026-06-05 CFR83 - Jun 5, 17:50 UTCJun 5, 18:20 UTC30m
2026-06-04 CFR83 - Jun 4, 18:45 UTCJun 4, 19:00 UTC15m
2026-06-03 CFR83 - Jun 3, 21:25 UTCJun 3, 21:40 UTC15m
2026-06-03 CFR83 - Jun 3, 19:25 UTCJun 3, 19:55 UTC30m
2026-06-02 CFR83 - Jun 2, 23:00 UTCJun 2, 23:45 UTC45m
2026-06-01 CFR83 - Jun 1, 21:45 UTCJun 1, 22:05 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 N424DF page for operator, model, and routing details .

Mode-S A50ACC frequently asked

What is Mode-S code A50ACC?
A50ACC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N424DF.
Where is Mode-S A50ACC registered?
Mode-S code A50ACC 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 A50ACC broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A50ACC, octal 51205314, decimal 10,816,204.
What flights does A50ACC operate?
Mode-S A50ACC has broadcast 1 distinct callsign, including CFR83.