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sensors Mode-S transponder

ABC56D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N858DT · operated by UTAH STATE UNIVERSITY

Hex
ABC56D
Octal
52742555
Decimal
11,257,197
Country
US
Tail
N858DT
Type
DA40
No current signal · last broadcast 18h ago
Flights observed
103
Distinct callsigns
1
Country
US
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S ABC56D.

Country allocation

The ICAO 24-bit address ABC56D 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
N858DT - 103 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 N858DT LGU → LGU May 29, 20:05 UTCMay 29, 22:00 UTC1h 55m
2026-05-29 N858DT LGU → LGU May 29, 17:20 UTCMay 29, 18:55 UTC1h 35m
2026-05-29 N858DT LGU → LGU May 29, 16:10 UTCMay 29, 16:30 UTC20m
2026-05-29 N858DT LGU → LGU May 29, 15:40 UTCMay 29, 16:05 UTC25m
2026-05-29 N858DT - May 29, 14:40 UTCMay 29, 15:00 UTC20m
2026-05-29 N858DT - May 29, 13:45 UTCMay 29, 14:00 UTC15m
2026-05-29 N858DT LGU → LGU May 29, 01:25 UTCMay 29, 02:45 UTC1h 20m
2026-05-28 N858DT LGU → LGU May 28, 17:20 UTCMay 28, 18:00 UTC40m
2026-05-28 N858DT LGU → LGU May 28, 15:05 UTCMay 28, 15:40 UTC35m
2026-05-27 N858DT - May 27, 16:10 UTCMay 27, 16:20 UTC10m
2026-05-27 N858DT - May 27, 15:20 UTCMay 27, 15:40 UTC20m
2026-05-25 N858DT LGU → LGU May 25, 18:50 UTCMay 25, 19:54 UTC1h 4m
2026-05-23 N858DT - May 23, 20:40 UTCMay 23, 20:50 UTC10m
2026-05-23 N858DT - May 23, 17:15 UTCMay 23, 18:15 UTC1h 1m
2026-05-23 N858DT LGU → PVU May 23, 16:00 UTCMay 23, 17:10 UTC1h 10m
2026-05-22 N858DT LGU → LGU May 22, 23:20 UTCMay 23, 01:10 UTC1h 50m
2026-05-22 N858DT LGU → LGU May 22, 21:25 UTCMay 22, 21:40 UTC15m
2026-05-22 N858DT LGU → LGU May 22, 18:40 UTCMay 22, 19:30 UTC50m
2026-05-22 N858DT LGU → LGU May 22, 15:50 UTCMay 22, 17:10 UTC1h 20m
2026-05-22 N858DT - May 22, 03:30 UTCMay 22, 04:05 UTC35m
2026-05-22 N858DT - May 22, 01:30 UTCMay 22, 02:05 UTC35m
2026-05-21 N858DT LGU → LGU May 21, 15:10 UTCMay 21, 16:15 UTC1h 5m
2026-05-21 N858DT - May 21, 04:20 UTCMay 21, 04:55 UTC35m
2026-05-21 N858DT LGU → LGU May 21, 01:15 UTCMay 21, 02:25 UTC1h 10m
2026-05-20 N858DT LGU → LGU May 20, 20:15 UTCMay 20, 20:25 UTC10m
2026-05-20 N858DT LGU → LGU May 20, 18:05 UTCMay 20, 19:10 UTC1h 5m
2026-05-20 N858DT - May 20, 01:05 UTCMay 20, 01:25 UTC20m
2026-05-19 N858DT - May 19, 23:35 UTCMay 20, 00:10 UTC35m
2026-05-19 N858DT - May 19, 22:30 UTCMay 19, 22:50 UTC20m
2026-05-19 N858DT LGU → LGU May 19, 18:45 UTCMay 19, 19:50 UTC1h 5m
2026-05-19 N858DT LGU → LGU May 19, 16:00 UTCMay 19, 17:05 UTC1h 5m
2026-05-19 N858DT LGU → LGU May 19, 13:50 UTCMay 19, 14:55 UTC1h 5m
2026-05-19 N858DT LGU → LGU May 19, 03:50 UTCMay 19, 04:40 UTC50m
2026-05-19 N858DT LGU → LGU May 19, 00:50 UTCMay 19, 02:35 UTC1h 45m
2026-05-18 N858DT LGU → LGU May 18, 22:00 UTCMay 18, 23:35 UTC1h 35m
2026-05-18 N858DT - May 18, 20:10 UTCMay 18, 20:50 UTC40m
2026-05-18 N858DT - May 18, 17:55 UTCMay 18, 18:40 UTC44m
2026-05-18 N858DT LGU → LGU May 18, 01:55 UTCMay 18, 02:55 UTC1h 0m
2026-05-17 N858DT LGU → LGU May 17, 15:55 UTCMay 17, 16:45 UTC50m
2026-05-16 N858DT LGU → LGU May 16, 21:50 UTCMay 16, 23:00 UTC1h 10m
2026-05-16 N858DT LGU → LGU May 16, 17:50 UTCMay 16, 19:25 UTC1h 35m
2026-05-15 N858DT LGU → LGU May 15, 20:55 UTCMay 15, 21:55 UTC1h 0m
2026-05-15 N858DT - May 15, 18:50 UTCMay 15, 19:25 UTC35m
2026-05-15 N858DT - May 15, 16:50 UTCMay 15, 18:00 UTC1h 10m
2026-05-15 N858DT LGU → LGU May 15, 14:40 UTCMay 15, 16:00 UTC1h 19m
2026-05-15 N858DT LGU → LGU May 15, 00:20 UTCMay 15, 02:00 UTC1h 40m
2026-05-14 N858DT LGU → LGU May 14, 21:55 UTCMay 14, 23:15 UTC1h 20m
2026-05-14 N858DT LGU → LGU May 14, 18:15 UTCMay 14, 19:35 UTC1h 20m
2026-05-14 N858DT - May 14, 16:55 UTCMay 14, 17:20 UTC25m
2026-05-14 N858DT LGU → LGU May 14, 14:10 UTCMay 14, 15:50 UTC1h 40m

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 N858DT page for operator, model, and routing details .

Mode-S ABC56D frequently asked

What is Mode-S code ABC56D?
ABC56D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N858DT.
Where is Mode-S ABC56D registered?
Mode-S code ABC56D 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 ABC56D broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ABC56D, octal 52742555, decimal 11,257,197.
What flights does ABC56D operate?
Mode-S ABC56D has broadcast 1 distinct callsign, including N858DT.