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sensors Mode-S transponder

A7572F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N572PU · operated by TRUSTEES OF PURDUE UNIVERSITY

Hex
A7572F
Octal
51653457
Decimal
10,966,831
Country
US
Tail
N572PU
Type
PA44
No current signal · last broadcast Jul 20, 19:05 UTC
Flights observed
38
Distinct callsigns
1
Country
US
Last broadcast
Jul 20, 19:05 UTC

Last known position

Most recent position reported by Mode-S A7572F.

Country allocation

The ICAO 24-bit address A7572F 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
PDU72 - 38 2026-07-20

Recent flights last 38

DateFlightRouteTakeoffLandingDuration
2026-07-20 PDU72 LAF → LAF Jul 20, 18:15 UTCJul 20, 19:05 UTC50m
2026-07-20 PDU72 LAF → LAF Jul 20, 12:10 UTCJul 20, 13:10 UTC1h 0m
2026-07-18 PDU72 LAF → LAF Jul 18, 12:10 UTCJul 18, 13:20 UTC1h 10m
2026-07-17 PDU72 - Jul 17, 18:34 UTCJul 17, 18:50 UTC15m
2026-07-17 PDU72 - Jul 17, 17:05 UTCJul 17, 17:25 UTC20m
2026-07-17 PDU72 - Jul 17, 15:55 UTCJul 17, 16:15 UTC20m
2026-07-16 PDU72 LAF → LAF Jul 16, 12:14 UTCJul 16, 13:15 UTC1h 0m
2026-07-15 PDU72 - Jul 15, 18:20 UTCJul 15, 19:40 UTC1h 20m
2026-07-15 PDU72 - Jul 15, 14:50 UTCJul 15, 16:10 UTC1h 20m
2026-07-14 PDU72 LAF → LAF Jul 14, 23:55 UTCJul 15, 00:55 UTC1h 0m
2026-07-09 PDU72 LAF → LAF Jul 9, 22:55 UTCJul 9, 23:30 UTC35m
2026-07-09 PDU72 LAF → LAF Jul 9, 20:55 UTCJul 9, 21:40 UTC45m
2026-07-09 PDU72 - Jul 9, 11:55 UTCJul 9, 13:30 UTC1h 35m
2026-07-08 PDU72 LAF → LAF Jul 8, 21:40 UTCJul 8, 23:00 UTC1h 20m
2026-07-08 PDU72 LAF → LAF Jul 8, 12:15 UTCJul 8, 13:35 UTC1h 20m
2026-07-08 PDU72 - Jul 8, 02:30 UTCJul 8, 03:00 UTC30m
2026-07-07 PDU72 - Jul 7, 18:10 UTCJul 7, 19:20 UTC1h 10m
2026-07-06 PDU72 - Jul 6, 19:35 UTCJul 6, 20:20 UTC45m
2026-07-02 PDU72 LAF → LAF Jul 2, 12:20 UTCJul 2, 13:25 UTC1h 5m
2026-07-01 PDU72 LAF → LAF Jul 1, 18:35 UTCJul 1, 19:30 UTC55m
2026-07-01 PDU72 LAF → LAF Jul 1, 16:55 UTCJul 1, 17:10 UTC15m
2026-07-01 PDU72 LAF → LAF Jul 1, 14:30 UTCJul 1, 15:15 UTC45m
2026-07-01 PDU72 LAF → LAF Jul 1, 12:40 UTCJul 1, 13:45 UTC1h 5m
2026-06-30 PDU72 LAF → LAF Jun 30, 14:20 UTCJun 30, 15:15 UTC55m
2026-06-30 PDU72 LAF → LAF Jun 30, 12:00 UTCJun 30, 13:15 UTC1h 15m
2026-06-29 PDU72 LAF → LAF Jun 29, 18:44 UTCJun 29, 19:29 UTC45m
2026-06-29 PDU72 LAF → LAF Jun 29, 13:44 UTCJun 29, 14:44 UTC1h 0m
2026-06-27 PDU72 LAF → LAF Jun 27, 20:04 UTCJun 27, 21:19 UTC1h 15m
2026-06-26 PDU72 - Jun 26, 14:09 UTCJun 26, 14:29 UTC20m
2026-06-26 PDU72 LAF → LAF Jun 26, 00:15 UTCJun 26, 01:39 UTC1h 25m
2026-06-25 PDU72 LAF → LAF Jun 25, 13:55 UTCJun 25, 14:44 UTC50m
2026-06-24 PDU72 LAF → LAF Jun 24, 18:09 UTCJun 24, 19:24 UTC1h 15m
2026-06-24 PDU72 LAF → LAF Jun 24, 11:59 UTCJun 24, 13:05 UTC1h 5m
2026-06-23 PDU72 LAF → LAF Jun 23, 14:15 UTCJun 23, 14:59 UTC45m
2026-06-17 PDU72 LAF → LAF Jun 17, 12:25 UTCJun 17, 13:05 UTC40m
2026-06-10 PDU72 LAF → LAF Jun 10, 12:15 UTCJun 10, 12:45 UTC30m
2026-06-10 PDU72 LAF → LAF Jun 10, 02:10 UTCJun 10, 02:55 UTC45m
2026-06-09 PDU72 LAF → LAF Jun 9, 18:25 UTCJun 9, 18:55 UTC30m

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 N572PU page for operator, model, and routing details .

Mode-S A7572F frequently asked

What is Mode-S code A7572F?
A7572F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N572PU.
Where is Mode-S A7572F registered?
Mode-S code A7572F 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 A7572F broadcasting right now?
No active broadcast right now. Last signal was Jul 20, 19:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7572F, octal 51653457, decimal 10,966,831.
What flights does A7572F operate?
Mode-S A7572F has broadcast 1 distinct callsign, including PDU72.