Apparatus

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sensors Mode-S transponder

A97B52

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N71SP · operated by STATE OF DELAWARE

Hex
A97B52
Octal
52275522
Decimal
11,107,154
Country
US
Tail
N71SP
Type
B429
No current signal · last broadcast 4d ago
Flights observed
117
Distinct callsigns
1
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A97B52.

Country allocation

The ICAO 24-bit address A97B52 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
N71SP - 117 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-02 N71SP - Jul 2, 00:00 UTCJul 2, 00:15 UTC15m
2026-07-01 N71SP - Jul 1, 23:20 UTCJul 1, 23:30 UTC10m
2026-07-01 N71SP - Jul 1, 22:20 UTCJul 1, 22:45 UTC25m
2026-07-01 N71SP - Jul 1, 17:50 UTCJul 1, 18:10 UTC20m
2026-07-01 N71SP - Jul 1, 16:30 UTCJul 1, 16:50 UTC20m
2026-07-01 N71SP - Jul 1, 13:10 UTCJul 1, 14:05 UTC55m
2026-07-01 N71SP - Jul 1, 03:40 UTCJul 1, 04:00 UTC20m
2026-07-01 N71SP - Jul 1, 00:15 UTCJul 1, 00:50 UTC35m
2026-06-30 N71SP - Jun 30, 23:25 UTCJun 30, 23:40 UTC15m
2026-06-30 N71SP - Jun 30, 17:15 UTCJun 30, 18:00 UTC45m
2026-06-30 N71SP - Jun 30, 15:35 UTCJun 30, 15:55 UTC20m
2026-06-30 N71SP - Jun 30, 01:45 UTCJun 30, 02:00 UTC15m
2026-06-30 N71SP - Jun 30, 00:00 UTCJun 30, 00:09 UTC10m
2026-06-27 N71SP - Jun 27, 02:14 UTCJun 27, 02:29 UTC15m
2026-06-25 N71SP - Jun 25, 18:59 UTCJun 25, 21:44 UTC2h 45m
2026-06-25 N71SP - Jun 25, 12:15 UTCJun 25, 12:54 UTC40m
2026-06-25 N71SP - Jun 25, 10:59 UTCJun 25, 11:44 UTC45m
2026-06-25 N71SP - Jun 25, 03:54 UTCJun 25, 05:00 UTC1h 5m
2026-06-24 N71SP - Jun 24, 16:09 UTCJun 24, 16:19 UTC10m
2026-06-24 N71SP - Jun 24, 04:34 UTCJun 24, 05:15 UTC40m
2026-06-23 N71SP - Jun 23, 14:55 UTCJun 23, 16:39 UTC1h 45m
2026-06-23 N71SP - Jun 23, 13:29 UTCJun 23, 13:59 UTC30m
2026-06-22 N71SP - Jun 22, 02:30 UTCJun 22, 03:14 UTC45m
2026-06-22 N71SP - Jun 22, 01:35 UTCJun 22, 01:49 UTC15m
2026-06-22 N71SP - Jun 22, 00:50 UTCJun 22, 01:00 UTC10m
2026-06-21 N71SP - Jun 21, 01:45 UTCJun 21, 02:15 UTC30m
2026-06-21 N71SP - Jun 21, 00:40 UTCJun 21, 00:59 UTC20m
2026-06-20 N71SP - Jun 20, 23:14 UTCJun 21, 00:10 UTC55m
2026-06-20 N71SP - Jun 20, 22:05 UTCJun 20, 22:39 UTC35m
2026-06-20 N71SP - Jun 20, 01:50 UTCJun 20, 02:29 UTC40m
2026-06-20 N71SP - Jun 20, 00:54 UTCJun 20, 01:14 UTC20m
2026-06-19 N71SP - Jun 19, 16:09 UTCJun 19, 17:24 UTC1h 15m
2026-06-19 N71SP - Jun 19, 13:24 UTCJun 19, 13:59 UTC35m
2026-06-19 N71SP - Jun 19, 12:29 UTCJun 19, 12:49 UTC20m
2026-06-18 N71SP - Jun 18, 21:35 UTCJun 18, 21:50 UTC15m
2026-06-18 N71SP - Jun 18, 20:10 UTCJun 18, 20:30 UTC20m
2026-06-15 N71SP - Jun 15, 13:54 UTCJun 15, 15:00 UTC1h 5m
2026-06-11 N71SP - Jun 11, 16:55 UTCJun 11, 17:35 UTC40m
2026-06-11 N71SP - Jun 11, 12:15 UTCJun 11, 12:50 UTC35m
2026-06-10 N71SP - Jun 10, 19:00 UTCJun 10, 20:05 UTC1h 5m
2026-06-10 N71SP - Jun 10, 03:25 UTCJun 10, 04:05 UTC40m
2026-06-10 N71SP - Jun 10, 01:30 UTCJun 10, 02:25 UTC55m
2026-06-09 N71SP - Jun 9, 20:10 UTCJun 9, 20:20 UTC10m
2026-06-07 N71SP - Jun 7, 20:05 UTCJun 7, 20:45 UTC40m
2026-06-07 N71SP - Jun 7, 18:05 UTCJun 7, 18:15 UTC10m
2026-06-07 N71SP - Jun 7, 13:40 UTCJun 7, 14:50 UTC1h 10m
2026-06-06 N71SP - Jun 6, 17:54 UTCJun 6, 19:40 UTC1h 45m
2026-06-04 N71SP - Jun 4, 21:30 UTCJun 4, 22:00 UTC30m
2026-06-04 N71SP - Jun 4, 20:40 UTCJun 4, 20:55 UTC15m
2026-06-04 N71SP - Jun 4, 05:20 UTCJun 4, 05:45 UTC25m

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 N71SP page for operator, model, and routing details .

Mode-S A97B52 frequently asked

What is Mode-S code A97B52?
A97B52 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N71SP.
Where is Mode-S A97B52 registered?
Mode-S code A97B52 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 A97B52 broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A97B52, octal 52275522, decimal 11,107,154.
What flights does A97B52 operate?
Mode-S A97B52 has broadcast 1 distinct callsign, including N71SP.