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sensors Mode-S transponder

ACA2B4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N913KC · AEROSPATIALE AS-350 Ecureuil · operated by KERN COUNTY SHERIFFS OFFICE

Hex
ACA2B4
Octal
53121264
Decimal
11,313,844
Country
US
Tail
N913KC
Type
AS50
Broadcasting now · callsign N913KC · 500 ft
Flights observed
139
Distinct callsigns
1
Country
US
Last broadcast
13h ago

Current position

ACA2B4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ACA2B4 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
N913KC - 139 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N913KC BFL → BFL Jul 14, 03:10 UTCJul 14, 04:30 UTC1h 20m
2026-07-13 N913KC BFL → BFL Jul 13, 18:05 UTCJul 13, 18:10 UTC5m
2026-07-11 N913KC BFL → BFL Jul 11, 06:35 UTCJul 11, 08:05 UTC1h 30m
2026-07-11 N913KC BFL → BFL Jul 11, 02:30 UTCJul 11, 04:25 UTC1h 55m
2026-07-10 N913KC - Jul 10, 06:15 UTCJul 10, 08:45 UTC2h 30m
2026-07-10 N913KC - Jul 10, 01:55 UTCJul 10, 03:40 UTC1h 45m
2026-07-09 N913KC - Jul 9, 06:20 UTCJul 9, 08:00 UTC1h 40m
2026-07-09 N913KC BFL → BFL Jul 9, 02:15 UTCJul 9, 04:40 UTC2h 25m
2026-07-05 N913KC - Jul 5, 02:05 UTCJul 5, 02:15 UTC10m
2026-07-04 N913KC - Jul 4, 23:40 UTCJul 4, 23:50 UTC10m
2026-07-04 N913KC - Jul 4, 06:15 UTCJul 4, 08:55 UTC2h 40m
2026-07-04 N913KC BFL → BFL Jul 4, 02:15 UTCJul 4, 04:10 UTC1h 55m
2026-07-02 N913KC - Jul 2, 22:40 UTCJul 2, 22:45 UTC5m
2026-07-02 N913KC - Jul 2, 20:25 UTCJul 2, 20:30 UTC5m
2026-07-02 N913KC - Jul 2, 16:05 UTCJul 2, 16:10 UTC5m
2026-07-02 N913KC - Jul 2, 15:00 UTCJul 2, 15:20 UTC20m
2026-07-02 N913KC - Jul 2, 13:25 UTCJul 2, 13:45 UTC20m
2026-06-29 N913KC - Jun 29, 19:00 UTCJun 29, 19:24 UTC25m
2026-06-29 N913KC - Jun 29, 17:10 UTCJun 29, 17:14 UTC5m
2026-06-28 N913KC BFL → BFL Jun 28, 05:24 UTCJun 28, 08:05 UTC2h 40m
2026-06-28 N913KC - Jun 28, 02:25 UTCJun 28, 02:44 UTC20m
2026-06-28 N913KC - Jun 28, 00:55 UTCJun 28, 01:04 UTC10m
2026-06-27 N913KC - Jun 27, 07:24 UTCJun 27, 08:35 UTC1h 10m
2026-06-27 N913KC BFL → BFL Jun 27, 04:15 UTCJun 27, 06:05 UTC1h 50m
2026-06-26 N913KC - Jun 26, 00:39 UTCJun 26, 00:50 UTC10m
2026-06-25 N913KC - Jun 25, 23:05 UTCJun 25, 23:19 UTC15m
2026-06-24 N913KC - Jun 24, 19:10 UTCJun 24, 19:39 UTC30m
2026-06-24 N913KC - Jun 24, 18:25 UTCJun 24, 18:34 UTC10m
2026-06-24 N913KC - Jun 24, 17:05 UTCJun 24, 17:10 UTC5m
2026-06-23 N913KC BFL → BFL Jun 23, 17:20 UTCJun 23, 19:00 UTC1h 40m
2026-06-21 N913KC - Jun 21, 08:04 UTCJun 21, 08:54 UTC50m
2026-06-21 N913KC BFL → BFL Jun 21, 03:34 UTCJun 21, 06:29 UTC2h 55m
2026-06-20 N913KC - Jun 20, 20:20 UTCJun 20, 20:25 UTC5m
2026-06-20 N913KC BFL → BFL Jun 20, 07:04 UTCJun 20, 08:19 UTC1h 15m
2026-06-20 N913KC BFL → BFL Jun 20, 04:14 UTCJun 20, 05:49 UTC1h 35m
2026-06-20 N913KC BFL → BFL Jun 20, 03:39 UTCJun 20, 04:09 UTC30m
2026-06-19 N913KC BFL → BFL Jun 19, 06:20 UTCJun 19, 08:09 UTC1h 50m
2026-06-19 N913KC BFL → BFL Jun 19, 03:29 UTCJun 19, 05:00 UTC1h 30m
2026-06-19 N913KC BFL → BFL Jun 19, 01:04 UTCJun 19, 01:54 UTC50m
2026-06-18 N913KC BFL → BFL Jun 18, 06:10 UTCJun 18, 08:05 UTC1h 55m
2026-06-18 N913KC - Jun 18, 03:15 UTCJun 18, 05:10 UTC1h 55m
2026-06-17 N913KC - Jun 17, 22:45 UTCJun 17, 23:40 UTC55m
2026-06-17 N913KC - Jun 17, 18:45 UTCJun 17, 18:50 UTC5m
2026-06-16 N913KC - Jun 16, 18:20 UTCJun 16, 19:00 UTC40m
2026-06-16 N913KC - Jun 16, 17:59 UTCJun 16, 18:15 UTC15m
2026-06-16 N913KC BFL → BFL Jun 16, 17:15 UTCJun 16, 17:24 UTC10m
2026-06-15 N913KC - Jun 15, 18:15 UTCJun 15, 18:50 UTC35m
2026-06-15 N913KC - Jun 15, 16:59 UTCJun 15, 17:30 UTC30m
2026-06-14 N913KC - Jun 14, 17:50 UTCJun 14, 18:35 UTC45m
2026-06-14 N913KC - Jun 14, 16:40 UTCJun 14, 16:50 UTC10m

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 N913KC page for operator, model, and routing details .

Mode-S ACA2B4 frequently asked

What is Mode-S code ACA2B4?
ACA2B4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N913KC.
Where is Mode-S ACA2B4 registered?
Mode-S code ACA2B4 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 ACA2B4 broadcasting right now?
Yes. Mode-S ACA2B4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA2B4, octal 53121264, decimal 11,313,844.
What flights does ACA2B4 operate?
Mode-S ACA2B4 has broadcast 1 distinct callsign, including N913KC.