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sensors Mode-S transponder

A53602

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N435DF · GRUMMAN S-2 Tracker · operated by USDA FOREST SERVICE FEPP, CALIFORNIA DEPT OF FORESTRY AND FIRE PROTECTION

Hex
A53602
Octal
51233002
Decimal
10,827,266
Country
US
Tail
N435DF
Type
S2P
No current signal · last broadcast 8h ago
Flights observed
182
Distinct callsigns
1
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A53602.

Country allocation

The ICAO 24-bit address A53602 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
CFR72 - 181 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CFR72 - Jul 17, 22:15 UTCJul 17, 22:45 UTC30m
2026-07-17 CFR72 - Jul 17, 21:44 UTCJul 17, 22:10 UTC25m
2026-07-17 CFR72 - Jul 17, 02:34 UTCJul 17, 02:59 UTC25m
2026-07-17 CFR72 - Jul 17, 02:05 UTCJul 17, 02:25 UTC20m
2026-07-17 CFR72 HMT → HMT Jul 17, 01:39 UTCJul 17, 01:59 UTC20m
2026-07-16 CFR72 - Jul 16, 02:25 UTCJul 16, 03:00 UTC35m
2026-07-15 CFR72 - Jul 15, 23:20 UTCJul 16, 01:55 UTC2h 35m
2026-07-15 CFR72 - Jul 15, 19:45 UTCJul 15, 20:40 UTC55m
2026-07-15 CFR72 HMT → HMT Jul 15, 19:20 UTCJul 15, 19:40 UTC20m
2026-07-14 CFR72 HMT → HMT Jul 14, 01:35 UTCJul 14, 02:05 UTC30m
2026-07-14 CFR72 HMT → HMT Jul 14, 01:10 UTCJul 14, 01:30 UTC20m
2026-07-14 CFR72 HMT → HMT Jul 14, 00:55 UTCJul 14, 01:05 UTC10m
2026-07-13 CFR72 HMT → HMT Jul 13, 21:00 UTCJul 13, 21:20 UTC20m
2026-07-12 CFR72 HMT → HMT Jul 12, 23:55 UTCJul 13, 00:10 UTC15m
2026-07-12 CFR72 - Jul 12, 23:40 UTCJul 12, 23:50 UTC10m
2026-07-12 CFR72 - Jul 12, 23:25 UTCJul 12, 23:35 UTC10m
2026-07-11 CFR72 - Jul 11, 18:10 UTCJul 11, 18:30 UTC20m
2026-07-11 CFR72 HMT → HMT Jul 11, 17:45 UTCJul 11, 18:05 UTC20m
2026-07-11 CFR72 HMT → HMT Jul 11, 17:25 UTCJul 11, 17:40 UTC15m
2026-07-11 CFR72 - Jul 11, 02:55 UTCJul 11, 03:25 UTC30m
2026-07-11 - - Jul 11, 00:20 UTCJul 11, 00:30 UTC10m
2026-07-10 CFR72 - Jul 10, 21:35 UTCJul 10, 22:15 UTC40m
2026-07-10 CFR72 - Jul 10, 20:40 UTCJul 10, 21:00 UTC20m
2026-07-09 CFR72 - Jul 9, 23:30 UTCJul 9, 23:40 UTC10m
2026-07-09 CFR72 - Jul 9, 23:10 UTCJul 9, 23:20 UTC10m
2026-07-09 CFR72 HMT → HMT Jul 9, 20:00 UTCJul 9, 22:40 UTC2h 40m
2026-07-08 CFR72 - Jul 8, 02:25 UTCJul 8, 03:05 UTC40m
2026-07-08 CFR72 - Jul 8, 01:50 UTCJul 8, 02:15 UTC25m
2026-07-08 CFR72 HMT → HMT Jul 8, 01:20 UTCJul 8, 01:45 UTC25m
2026-07-08 CFR72 - Jul 8, 00:25 UTCJul 8, 00:40 UTC15m
2026-07-08 CFR72 - Jul 8, 00:00 UTCJul 8, 00:15 UTC15m
2026-07-07 CFR72 - Jul 7, 23:30 UTCJul 7, 23:50 UTC20m
2026-07-07 CFR72 - Jul 7, 22:40 UTCJul 7, 23:25 UTC45m
2026-07-07 CFR72 HMT → HMT Jul 7, 22:15 UTCJul 7, 22:30 UTC15m
2026-07-07 CFR72 - Jul 7, 02:50 UTCJul 7, 03:05 UTC15m
2026-07-06 CFR72 - Jul 6, 23:20 UTCJul 7, 02:00 UTC2h 40m
2026-07-05 CFR72 HMT → HMT Jul 5, 22:40 UTCJul 5, 23:50 UTC1h 10m
2026-07-04 CFR72 - Jul 4, 02:25 UTCJul 4, 02:45 UTC20m
2026-07-04 CFR72 - Jul 4, 02:05 UTCJul 4, 02:15 UTC10m
2026-07-04 CFR72 HMT → SBD Jul 4, 01:35 UTCJul 4, 01:50 UTC15m
2026-07-03 CFR72 - Jul 3, 02:55 UTCJul 3, 03:40 UTC45m
2026-07-03 CFR72 HMT → SBD Jul 3, 02:00 UTCJul 3, 02:45 UTC45m
2026-07-02 CFR72 HMT → HMT Jul 2, 01:25 UTCJul 2, 02:25 UTC1h 0m
2026-06-30 CFR72 - Jun 30, 23:55 UTCJul 1, 00:25 UTC30m
2026-06-30 CFR72 - Jun 30, 23:20 UTCJun 30, 23:45 UTC25m
2026-06-30 CFR72 - Jun 30, 22:50 UTCJun 30, 23:15 UTC25m
2026-06-30 CFR72 HMT → HMT Jun 30, 22:20 UTCJun 30, 22:40 UTC20m
2026-06-30 CFR72 HMT → HMT Jun 30, 18:55 UTCJun 30, 19:40 UTC45m
2026-06-30 CFR72 HMT → HMT Jun 30, 00:45 UTCJun 30, 01:30 UTC46m
2026-06-29 CFR72 - Jun 29, 01:00 UTCJun 29, 01:10 UTC10m

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 N435DF page for operator, model, and routing details .

Mode-S A53602 frequently asked

What is Mode-S code A53602?
A53602 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N435DF.
Where is Mode-S A53602 registered?
Mode-S code A53602 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 A53602 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A53602, octal 51233002, decimal 10,827,266.
What flights does A53602 operate?
Mode-S A53602 has broadcast 1 distinct callsign, including CFR72.