Apparatus

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sensors Mode-S transponder

A58DBB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N457SP · CESSNA 172 Skyhawk · operated by SOUTH DAKOTA STATE UNIVERSITY

Hex
A58DBB
Octal
51306673
Decimal
10,849,723
Country
US
Tail
N457SP
Type
C172
No current signal · last broadcast 1d ago
Flights observed
100
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A58DBB.

Country allocation

The ICAO 24-bit address A58DBB 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
N457SP - 100 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 N457SP BKX → BKX May 28, 12:45 UTCMay 28, 14:15 UTC1h 30m
2026-05-28 N457SP - May 28, 01:40 UTCMay 28, 01:50 UTC10m
2026-05-28 N457SP - May 28, 00:30 UTCMay 28, 00:45 UTC15m
2026-05-27 N457SP - May 27, 23:15 UTCMay 27, 23:30 UTC15m
2026-05-27 N457SP - May 27, 22:35 UTCMay 27, 22:40 UTC5m
2026-05-27 N457SP BKX → BKX May 27, 20:35 UTCMay 27, 21:40 UTC1h 5m
2026-05-27 N457SP - May 27, 17:35 UTCMay 27, 19:40 UTC2h 5m
2026-05-27 N457SP BKX → BKX May 27, 14:55 UTCMay 27, 16:20 UTC1h 25m
2026-05-27 N457SP BKX → BKX May 27, 12:25 UTCMay 27, 13:55 UTC1h 30m
2026-05-27 N457SP BKX → BKX May 27, 03:14 UTCMay 27, 03:50 UTC35m
2026-05-26 N457SP BKX → BKX May 26, 23:29 UTCMay 27, 00:14 UTC45m
2026-05-26 N457SP BKX → BKX May 26, 21:29 UTCMay 26, 22:44 UTC1h 15m
2026-05-26 N457SP BKX → BKX May 26, 19:25 UTCMay 26, 20:09 UTC45m
2026-05-26 N457SP - May 26, 04:50 UTCMay 26, 05:25 UTC35m
2026-05-25 N457SP - May 25, 23:19 UTCMay 25, 23:35 UTC15m
2026-05-25 N457SP BKX → BKX May 25, 20:30 UTCMay 25, 21:40 UTC1h 10m
2026-05-25 N457SP BKX → BKX May 25, 19:40 UTCMay 25, 19:44 UTC5m
2026-05-25 N457SP - May 25, 17:45 UTCMay 25, 18:00 UTC15m
2026-05-24 N457SP - May 24, 20:40 UTCMay 24, 21:45 UTC1h 5m
2026-05-24 N457SP - May 24, 18:05 UTCMay 24, 20:10 UTC2h 5m
2026-05-23 N457SP BKX → BKX May 23, 23:40 UTCMay 24, 01:00 UTC1h 20m
2026-05-23 N457SP BKX → BKX May 23, 18:25 UTCMay 23, 20:10 UTC1h 45m
2026-05-22 N457SP BKX → BKX May 22, 02:45 UTCMay 22, 04:25 UTC1h 40m
2026-05-22 N457SP BKX → BKX May 22, 00:25 UTCMay 22, 01:50 UTC1h 25m
2026-05-21 N457SP BKX → BKX May 21, 22:30 UTCMay 21, 23:45 UTC1h 15m
2026-05-21 N457SP BKX → BKX May 21, 21:00 UTCMay 21, 21:30 UTC30m
2026-05-21 N457SP - May 21, 20:00 UTCMay 21, 20:05 UTC5m
2026-05-21 N457SP BKX → BKX May 21, 15:10 UTCMay 21, 16:01 UTC50m
2026-05-21 N457SP BKX → BKX May 21, 12:50 UTCMay 21, 14:05 UTC1h 15m
2026-05-21 N457SP BKX → BKX May 21, 06:05 UTCMay 21, 06:10 UTC5m
2026-05-21 N457SP - May 21, 04:55 UTCMay 21, 05:10 UTC15m
2026-05-21 N457SP - May 21, 02:50 UTCMay 21, 03:00 UTC10m
2026-05-20 N457SP BKX → BKX May 20, 22:55 UTCMay 20, 23:45 UTC50m
2026-05-20 N457SP BKX → BKX May 20, 21:20 UTCMay 20, 21:55 UTC35m
2026-05-20 N457SP BKX → BKX May 20, 17:30 UTCMay 20, 17:40 UTC10m
2026-05-20 N457SP BKX → BKX May 20, 15:20 UTCMay 20, 16:30 UTC1h 10m
2026-05-20 N457SP BKX → BKX May 20, 02:40 UTCMay 20, 04:10 UTC1h 30m
2026-05-20 N457SP BKX → BKX May 20, 00:30 UTCMay 20, 01:30 UTC1h 0m
2026-05-19 N457SP BKX → BKX May 19, 22:15 UTCMay 19, 23:25 UTC1h 10m
2026-05-15 N457SP - May 15, 19:10 UTCMay 15, 19:25 UTC15m
2026-05-15 N457SP - May 15, 18:15 UTCMay 15, 18:25 UTC10m
2026-05-15 N457SP - May 15, 16:10 UTCMay 15, 16:50 UTC40m
2026-05-15 N457SP - May 15, 14:30 UTCMay 15, 15:20 UTC49m
2026-05-15 N457SP BKX → BKX May 15, 12:20 UTCMay 15, 13:35 UTC1h 15m
2026-05-15 N457SP BKX → BKX May 15, 02:25 UTCMay 15, 04:20 UTC1h 55m
2026-05-14 N457SP - May 14, 04:20 UTCMay 14, 05:10 UTC50m
2026-05-14 N457SP - May 14, 02:35 UTCMay 14, 03:50 UTC1h 15m
2026-05-14 N457SP - May 14, 01:15 UTCMay 14, 01:20 UTC5m
2026-05-14 N457SP BKX → BKX May 14, 00:25 UTCMay 14, 00:40 UTC15m
2026-05-13 N457SP - May 13, 20:20 UTCMay 13, 22:50 UTC2h 30m

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 N457SP page for operator, model, and routing details .

Mode-S A58DBB frequently asked

What is Mode-S code A58DBB?
A58DBB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N457SP.
Where is Mode-S A58DBB registered?
Mode-S code A58DBB 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 A58DBB 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 A58DBB, octal 51306673, decimal 10,849,723.
What flights does A58DBB operate?
Mode-S A58DBB has broadcast 1 distinct callsign, including N457SP.