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sensors Mode-S transponder

A5726D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N450DF · GRUMMAN S-2 Tracker · operated by USDA FOREST SERVICE FEPP, CALIFORNIA DEPT OF FORESTRY & FIRE PROTECTION

Hex
A5726D
Octal
51271155
Decimal
10,842,733
Country
US
Tail
N450DF
Type
S2P
No current signal · last broadcast 1d ago
Flights observed
78
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A5726D.

Country allocation

The ICAO 24-bit address A5726D 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
CFR93 - 78 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 CFR93 - Jul 8, 01:55 UTCJul 8, 02:10 UTC15m
2026-07-07 CFR93 - Jul 7, 23:40 UTCJul 8, 00:05 UTC25m
2026-07-07 CFR93 - Jul 7, 22:55 UTCJul 7, 23:10 UTC15m
2026-07-07 CFR93 - Jul 7, 20:55 UTCJul 7, 21:20 UTC25m
2026-07-04 CFR93 - Jul 4, 01:10 UTCJul 4, 01:30 UTC20m
2026-07-02 CFR93 - Jul 2, 22:35 UTCJul 2, 22:50 UTC15m
2026-07-02 CFR93 - Jul 2, 21:25 UTCJul 2, 21:40 UTC15m
2026-07-02 CFR93 - Jul 2, 01:35 UTCJul 2, 02:35 UTC1h 0m
2026-07-02 CFR93 RDD → RDD Jul 2, 01:15 UTCJul 2, 01:30 UTC15m
2026-06-30 CFR93 - Jun 30, 23:20 UTCJul 1, 00:00 UTC40m
2026-06-30 CFR93 - Jun 30, 23:00 UTCJun 30, 23:10 UTC10m
2026-06-30 CFR93 RDD → RDD Jun 30, 22:00 UTCJun 30, 22:50 UTC50m
2026-06-30 CFR93 - Jun 30, 19:40 UTCJun 30, 20:25 UTC45m
2026-06-30 CFR93 - Jun 30, 19:20 UTCJun 30, 19:35 UTC15m
2026-06-30 CFR93 RDD → RDD Jun 30, 19:00 UTCJun 30, 19:15 UTC15m
2026-06-28 CFR93 - Jun 28, 01:40 UTCJun 28, 01:55 UTC15m
2026-06-27 CFR93 - Jun 27, 20:44 UTCJun 27, 21:10 UTC25m
2026-06-24 CFR93 - Jun 24, 19:10 UTCJun 24, 19:34 UTC25m
2026-06-24 CFR93 - Jun 24, 02:05 UTCJun 24, 02:54 UTC50m
2026-06-23 CFR93 - Jun 23, 22:29 UTCJun 23, 23:50 UTC1h 20m
2026-06-23 CFR93 - Jun 23, 22:10 UTCJun 23, 22:19 UTC10m
2026-06-23 CFR93 - Jun 23, 02:40 UTCJun 23, 03:04 UTC25m
2026-06-23 CFR93 - Jun 23, 01:04 UTCJun 23, 01:50 UTC45m
2026-06-22 CFR93 - Jun 22, 22:15 UTCJun 22, 23:05 UTC50m
2026-06-22 CFR93 - Jun 22, 21:10 UTCJun 22, 22:05 UTC55m
2026-06-21 CFR93 - Jun 21, 19:55 UTCJun 21, 20:14 UTC20m
2026-06-21 CFR93 RDD → RDD Jun 21, 01:59 UTCJun 21, 02:30 UTC30m
2026-06-20 CFR93 - Jun 20, 22:20 UTCJun 20, 23:34 UTC1h 15m
2026-06-20 CFR93 - Jun 20, 22:00 UTCJun 20, 22:10 UTC10m
2026-06-20 CFR93 - Jun 20, 21:40 UTCJun 20, 21:49 UTC10m
2026-06-19 CFR93 - Jun 19, 21:39 UTCJun 19, 22:04 UTC25m
2026-06-19 CFR93 RDD → RDD Jun 19, 19:59 UTCJun 19, 20:24 UTC25m
2026-06-19 CFR93 - Jun 19, 19:29 UTCJun 19, 19:54 UTC25m
2026-06-17 CFR93 - Jun 17, 01:35 UTCJun 17, 01:55 UTC20m
2026-06-16 CFR93 - Jun 16, 23:40 UTCJun 16, 23:55 UTC15m
2026-06-14 CFR93 - Jun 14, 22:25 UTCJun 14, 23:10 UTC45m
2026-06-14 CFR93 - Jun 14, 22:05 UTCJun 14, 22:20 UTC15m
2026-06-14 CFR93 - Jun 14, 02:10 UTCJun 14, 02:25 UTC15m
2026-06-14 CFR93 - Jun 14, 01:40 UTCJun 14, 01:50 UTC10m
2026-06-13 CFR93 - Jun 13, 22:55 UTCJun 13, 23:15 UTC20m
2026-06-13 CFR93 - Jun 13, 22:20 UTCJun 13, 22:35 UTC15m
2026-06-13 CFR93 - Jun 13, 21:35 UTCJun 13, 21:45 UTC10m
2026-06-13 CFR93 - Jun 13, 03:00 UTCJun 13, 03:15 UTC15m
2026-06-13 CFR93 - Jun 13, 02:15 UTCJun 13, 02:25 UTC10m
2026-06-12 CFR93 - Jun 12, 21:05 UTCJun 12, 21:25 UTC20m
2026-06-12 CFR93 BZF → RDD Jun 12, 20:35 UTCJun 12, 20:55 UTC20m
2026-06-11 CFR93 - Jun 11, 18:25 UTCJun 11, 19:05 UTC40m
2026-06-11 CFR93 - Jun 11, 18:05 UTCJun 11, 18:15 UTC10m
2026-06-11 CFR93 - Jun 11, 01:40 UTCJun 11, 02:20 UTC40m
2026-06-11 CFR93 - Jun 11, 01:15 UTCJun 11, 01:35 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 N450DF page for operator, model, and routing details .

Mode-S A5726D frequently asked

What is Mode-S code A5726D?
A5726D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N450DF.
Where is Mode-S A5726D registered?
Mode-S code A5726D 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 A5726D 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 A5726D, octal 51271155, decimal 10,842,733.
What flights does A5726D operate?
Mode-S A5726D has broadcast 1 distinct callsign, including CFR93.