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sensors Mode-S transponder

A52ADD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N432DF · GRUMMAN S-2 Tracker · operated by USDA FOREST SERVICE FEPP, CALIFORNIA DEPT OF FORESTRY AND FIRE PROTECTION

Hex
A52ADD
Octal
51225335
Decimal
10,824,413
Country
US
Tail
N432DF
Type
S2P
No current signal · last broadcast 19d ago
Flights observed
127
Distinct callsigns
1
Country
US
Last broadcast
19d ago

Last known position

Most recent position reported by Mode-S A52ADD.

Country allocation

The ICAO 24-bit address A52ADD 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
CFRT71 - 127 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CFRT71 - Jul 25, 00:35 UTCJul 25, 01:50 UTC1h 15m
2026-07-24 CFRT71 - Jul 24, 18:55 UTCJul 24, 19:35 UTC40m
2026-07-23 CFRT71 - Jul 23, 18:50 UTCJul 23, 19:05 UTC15m
2026-07-23 CFRT71 HMT → HMT Jul 23, 18:15 UTCJul 23, 18:45 UTC30m
2026-07-23 CFRT71 - Jul 23, 17:45 UTCJul 23, 18:10 UTC25m
2026-07-22 CFRT71 - Jul 22, 22:00 UTCJul 23, 01:10 UTC3h 10m
2026-07-22 CFRT71 - Jul 22, 17:30 UTCJul 22, 18:50 UTC1h 20m
2026-07-21 CFRT71 - Jul 21, 23:20 UTCJul 21, 23:30 UTC10m
2026-07-21 CFRT71 - Jul 21, 22:50 UTCJul 21, 23:15 UTC25m
2026-07-21 CFRT71 - Jul 21, 22:15 UTCJul 21, 22:40 UTC25m
2026-07-20 CFRT71 - Jul 20, 21:25 UTCJul 20, 21:50 UTC25m
2026-07-15 CFRT71 - Jul 15, 22:50 UTCJul 16, 02:40 UTC3h 50m
2026-07-15 CFRT71 - Jul 15, 17:20 UTCJul 15, 17:30 UTC10m
2026-07-14 CFRT71 - Jul 14, 01:30 UTCJul 14, 01:55 UTC25m
2026-07-14 CFRT71 - Jul 14, 01:05 UTCJul 14, 01:25 UTC20m
2026-07-12 CFRT71 - Jul 12, 01:15 UTCJul 12, 01:40 UTC25m
2026-07-12 CFRT71 - Jul 12, 00:25 UTCJul 12, 00:40 UTC15m
2026-07-09 CFRT71 - Jul 9, 23:35 UTCJul 9, 23:45 UTC10m
2026-07-09 CFRT71 - Jul 9, 21:50 UTCJul 9, 22:00 UTC10m
2026-07-09 CFRT71 - Jul 9, 21:20 UTCJul 9, 21:45 UTC25m
2026-07-09 CFRT71 - Jul 9, 19:00 UTCJul 9, 19:10 UTC10m
2026-07-08 CFRT71 - Jul 8, 22:20 UTCJul 8, 22:50 UTC30m
2026-07-08 CFRT71 - Jul 8, 02:55 UTCJul 8, 03:10 UTC15m
2026-07-08 CFRT71 - Jul 8, 02:25 UTCJul 8, 02:50 UTC25m
2026-07-08 CFRT71 - Jul 8, 01:40 UTCJul 8, 02:15 UTC35m
2026-07-08 CFRT71 - Jul 8, 00:35 UTCJul 8, 00:55 UTC20m
2026-07-08 CFRT71 - Jul 8, 00:10 UTCJul 8, 00:25 UTC15m
2026-07-07 CFRT71 - Jul 7, 23:35 UTCJul 8, 00:00 UTC25m
2026-07-07 CFRT71 - Jul 7, 23:10 UTCJul 7, 23:30 UTC20m
2026-07-07 CFRT71 - Jul 7, 22:40 UTCJul 7, 23:05 UTC25m
2026-07-07 CFRT71 - Jul 7, 17:55 UTCJul 7, 18:15 UTC20m
2026-07-07 CFRT71 - Jul 7, 01:30 UTCJul 7, 02:25 UTC55m
2026-07-06 CFRT71 - Jul 6, 22:30 UTCJul 7, 00:45 UTC2h 15m
2026-07-06 CFRT71 - Jul 6, 19:55 UTCJul 6, 20:40 UTC45m
2026-07-05 CFRT71 - Jul 5, 22:55 UTCJul 5, 23:50 UTC55m
2026-07-04 CFRT71 - Jul 4, 02:15 UTCJul 4, 02:50 UTC35m
2026-07-04 CFRT71 - Jul 4, 01:40 UTCJul 4, 02:05 UTC25m
2026-07-02 CFRT71 - Jul 2, 17:45 UTCJul 2, 18:25 UTC40m
2026-06-30 CFRT71 - Jun 30, 22:55 UTCJul 1, 01:05 UTC2h 10m
2026-06-30 CFRT71 - Jun 30, 00:25 UTCJun 30, 01:19 UTC55m
2026-06-29 CFRT71 - Jun 29, 01:34 UTCJun 29, 02:05 UTC30m
2026-06-29 CFRT71 - Jun 29, 01:10 UTCJun 29, 01:25 UTC15m
2026-06-29 CFRT71 - Jun 29, 00:39 UTCJun 29, 01:05 UTC25m
2026-06-28 CFRT71 - Jun 28, 17:34 UTCJun 28, 18:10 UTC35m
2026-06-28 CFRT71 - Jun 28, 01:44 UTCJun 28, 02:14 UTC30m
2026-06-27 CFRT71 - Jun 27, 23:29 UTCJun 28, 00:00 UTC30m
2026-06-27 CFRT71 - Jun 27, 22:55 UTCJun 27, 23:19 UTC25m
2026-06-27 CFRT71 - Jun 27, 22:29 UTCJun 27, 22:45 UTC15m
2026-06-27 CFRT71 - Jun 27, 21:34 UTCJun 27, 22:20 UTC45m
2026-06-27 CFRT71 - Jun 27, 17:20 UTCJun 27, 17:55 UTC35m

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 N432DF page for operator, model, and routing details .

Mode-S A52ADD frequently asked

What is Mode-S code A52ADD?
A52ADD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N432DF.
Where is Mode-S A52ADD registered?
Mode-S code A52ADD 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 A52ADD broadcasting right now?
No active broadcast right now. Last signal was 19d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A52ADD, octal 51225335, decimal 10,824,413.
What flights does A52ADD operate?
Mode-S A52ADD has broadcast 1 distinct callsign, including CFRT71.