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sensors Mode-S transponder

AC953D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N91KK · CESSNA 525 Citation M2 · operated by C&S AVIATION LLC

Hex
AC953D
Octal
53112475
Decimal
11,310,397
Country
US
Tail
N91KK
Type
C25M
Broadcasting now · callsign HGHWY1 · 14,300 ft
Flights observed
112
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Current position

AC953D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AC953D 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
HGHWY1 - 112 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 HGHWY1 - Jul 14, 00:30 UTCJul 14, 01:15 UTC45m
2026-07-13 HGHWY1 - Jul 13, 15:25 UTCJul 13, 16:15 UTC50m
2026-07-13 HGHWY1 - Jul 13, 13:15 UTCJul 13, 14:35 UTC1h 20m
2026-07-12 HGHWY1 - Jul 12, 18:10 UTCJul 12, 19:15 UTC1h 5m
2026-07-07 HGHWY1 - Jul 7, 16:45 UTCJul 7, 17:00 UTC15m
2026-07-07 HGHWY1 - Jul 7, 15:00 UTCJul 7, 16:10 UTC1h 10m
2026-07-07 HGHWY1 - Jul 7, 12:35 UTCJul 7, 13:35 UTC1h 0m
2026-07-06 HGHWY1 - Jul 6, 20:45 UTCJul 6, 21:40 UTC55m
2026-07-06 HGHWY1 - Jul 6, 16:40 UTCJul 6, 17:45 UTC1h 5m
2026-07-06 HGHWY1 - Jul 6, 15:25 UTCJul 6, 15:55 UTC30m
2026-06-22 HGHWY1 - Jun 22, 18:15 UTCJun 22, 18:24 UTC10m
2026-06-22 HGHWY1 - Jun 22, 16:54 UTCJun 22, 17:34 UTC40m
2026-06-22 HGHWY1 - Jun 22, 12:59 UTCJun 22, 13:39 UTC40m
2026-06-22 HGHWY1 - Jun 22, 11:50 UTCJun 22, 12:10 UTC20m
2026-06-19 HGHWY1 - Jun 19, 04:14 UTCJun 19, 04:29 UTC15m
2026-06-19 HGHWY1 - Jun 19, 02:04 UTCJun 19, 03:34 UTC1h 30m
2026-06-18 HGHWY1 - Jun 18, 17:45 UTCJun 18, 21:10 UTC3h 25m
2026-06-18 HGHWY1 - Jun 18, 12:05 UTCJun 18, 12:50 UTC45m
2026-06-18 HGHWY1 - Jun 18, 10:55 UTCJun 18, 11:20 UTC25m
2026-06-17 HGHWY1 - Jun 17, 00:40 UTCJun 17, 00:55 UTC15m
2026-06-16 HGHWY1 - Jun 16, 22:30 UTCJun 16, 23:45 UTC1h 15m
2026-06-16 HGHWY1 - Jun 16, 15:20 UTCJun 16, 16:05 UTC45m
2026-06-16 HGHWY1 - Jun 16, 14:05 UTCJun 16, 14:35 UTC30m
2026-06-14 HGHWY1 - Jun 14, 22:50 UTCJun 15, 00:15 UTC1h 25m
2026-06-14 HGHWY1 - Jun 14, 21:35 UTCJun 14, 22:15 UTC40m
2026-06-14 HGHWY1 - Jun 14, 19:35 UTCJun 14, 20:55 UTC1h 20m
2026-06-14 HGHWY1 - Jun 14, 18:30 UTCJun 14, 18:55 UTC25m
2026-06-13 HGHWY1 - Jun 13, 02:45 UTCJun 13, 04:40 UTC1h 55m
2026-06-13 HGHWY1 - Jun 13, 00:45 UTCJun 13, 02:05 UTC1h 20m
2026-06-12 HGHWY1 - Jun 12, 22:55 UTCJun 13, 00:05 UTC1h 10m
2026-06-12 HGHWY1 - Jun 12, 15:55 UTCJun 12, 17:05 UTC1h 10m
2026-06-12 HGHWY1 - Jun 12, 14:35 UTCJun 12, 14:50 UTC15m
2026-06-11 HGHWY1 - Jun 11, 22:35 UTCJun 11, 23:40 UTC1h 5m
2026-06-11 HGHWY1 - Jun 11, 16:45 UTCJun 11, 17:10 UTC25m
2026-06-11 HGHWY1 - Jun 11, 13:45 UTCJun 11, 14:10 UTC25m
2026-06-11 HGHWY1 - Jun 11, 12:45 UTCJun 11, 13:05 UTC20m
2026-06-10 HGHWY1 - Jun 10, 21:15 UTCJun 10, 22:45 UTC1h 30m
2026-06-10 HGHWY1 - Jun 10, 18:15 UTCJun 10, 18:45 UTC30m
2026-06-10 HGHWY1 - Jun 10, 17:00 UTCJun 10, 17:30 UTC30m
2026-06-10 HGHWY1 - Jun 10, 15:05 UTCJun 10, 16:10 UTC1h 5m
2026-06-10 HGHWY1 - Jun 10, 13:00 UTCJun 10, 13:20 UTC20m
2026-06-09 HGHWY1 - Jun 9, 20:40 UTCJun 9, 21:50 UTC1h 10m
2026-06-09 HGHWY1 - Jun 9, 14:50 UTCJun 9, 15:35 UTC45m
2026-06-09 HGHWY1 - Jun 9, 14:10 UTCJun 9, 14:35 UTC25m
2026-06-03 HGHWY1 - Jun 3, 19:35 UTCJun 3, 20:25 UTC50m
2026-06-03 HGHWY1 - Jun 3, 17:05 UTCJun 3, 18:20 UTC1h 15m
2026-06-03 HGHWY1 - Jun 3, 15:50 UTCJun 3, 16:15 UTC25m
2026-06-02 HGHWY1 - Jun 2, 19:25 UTCJun 2, 19:40 UTC15m
2026-06-02 HGHWY1 - Jun 2, 17:40 UTCJun 2, 18:35 UTC55m
2026-06-02 HGHWY1 - Jun 2, 14:20 UTCJun 2, 15:30 UTC1h 10m

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 N91KK page for operator, model, and routing details .

Mode-S AC953D frequently asked

What is Mode-S code AC953D?
AC953D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N91KK.
Where is Mode-S AC953D registered?
Mode-S code AC953D 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 AC953D broadcasting right now?
Yes. Mode-S AC953D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC953D, octal 53112475, decimal 11,310,397.
What flights does AC953D operate?
Mode-S AC953D has broadcast 1 distinct callsign, including HGHWY1.