Apparatus

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sensors Mode-S transponder

ACAF6A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N91604 · operated by CAROLINA COATING SYSTEMS LLC

Hex
ACAF6A
Octal
53127552
Decimal
11,317,098
Country
US
Tail
N91604
Type
C182
No current signal · last broadcast Jul 25, 20:50 UTC
Flights observed
52
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 20:50 UTC

Last known position

Most recent position reported by Mode-S ACAF6A.

Country allocation

The ICAO 24-bit address ACAF6A 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
N91604 - 52 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N91604 - Jul 25, 20:30 UTCJul 25, 20:50 UTC20m
2026-07-25 N91604 - Jul 25, 18:55 UTCJul 25, 19:10 UTC15m
2026-07-25 N91604 - Jul 25, 01:35 UTCJul 25, 01:55 UTC20m
2026-07-24 N91604 - Jul 24, 13:35 UTCJul 24, 13:55 UTC20m
2026-07-23 N91604 - Jul 23, 02:30 UTCJul 23, 03:10 UTC40m
2026-07-17 N91604 - Jul 17, 02:20 UTCJul 17, 02:45 UTC25m
2026-07-16 N91604 - Jul 16, 14:15 UTCJul 16, 14:35 UTC20m
2026-07-15 N91604 - Jul 15, 20:55 UTCJul 15, 21:15 UTC20m
2026-07-15 N91604 - Jul 15, 14:30 UTCJul 15, 14:50 UTC20m
2026-07-14 N91604 - Jul 14, 04:10 UTCJul 14, 04:35 UTC25m
2026-07-13 N91604 - Jul 13, 22:35 UTCJul 13, 22:55 UTC20m
2026-07-12 N91604 MYF → RBK Jul 12, 22:50 UTCJul 12, 23:20 UTC30m
2026-07-12 N91604 - Jul 12, 20:40 UTCJul 12, 21:05 UTC25m
2026-07-08 N91604 RBK → RBK Jul 8, 23:10 UTCJul 9, 00:00 UTC50m
2026-06-28 N91604 - Jun 28, 22:15 UTCJun 28, 23:25 UTC1h 10m
2026-06-28 N91604 RBK → SBA Jun 28, 17:50 UTCJun 28, 19:09 UTC1h 20m
2026-06-27 N91604 - Jun 27, 20:24 UTCJun 27, 21:29 UTC1h 5m
2026-06-27 N91604 - Jun 27, 18:29 UTCJun 27, 18:54 UTC25m
2026-06-27 N91604 - Jun 27, 17:34 UTCJun 27, 17:55 UTC20m
2026-06-26 N91604 RBK → RBK Jun 26, 02:14 UTCJun 26, 02:50 UTC35m
2026-06-22 N91604 - Jun 22, 22:05 UTCJun 22, 22:30 UTC25m
2026-06-22 N91604 - Jun 22, 19:54 UTCJun 22, 20:19 UTC25m
2026-06-20 N91604 - Jun 20, 00:29 UTCJun 20, 00:49 UTC20m
2026-06-19 N91604 - Jun 19, 16:14 UTCJun 19, 16:49 UTC35m
2026-06-15 N91604 - Jun 15, 22:59 UTCJun 15, 23:19 UTC20m
2026-06-15 N91604 - Jun 15, 14:40 UTCJun 15, 15:04 UTC25m
2026-06-14 N91604 - Jun 14, 17:20 UTCJun 14, 17:40 UTC20m
2026-06-14 N91604 - Jun 14, 15:15 UTCJun 14, 15:35 UTC20m
2026-06-12 N91604 - Jun 12, 23:05 UTCJun 12, 23:25 UTC20m
2026-06-12 N91604 - Jun 12, 18:35 UTCJun 12, 19:00 UTC25m
2026-05-31 N91604 CLD → RBK May 31, 21:55 UTCMay 31, 22:35 UTC40m
2026-05-31 N91604 - May 31, 19:55 UTCMay 31, 20:15 UTC20m
2026-05-30 N91604 RBK → RBK May 30, 20:15 UTCMay 30, 20:50 UTC35m
2026-05-28 N91604 - May 28, 20:20 UTCMay 28, 20:40 UTC20m
2026-05-28 N91604 - May 28, 13:50 UTCMay 28, 14:10 UTC20m
2026-05-26 N91604 - May 26, 22:39 UTCMay 26, 23:10 UTC30m
2026-05-16 N91604 - May 16, 17:15 UTCMay 16, 18:20 UTC1h 5m
2026-05-15 N91604 RBK → RBK May 15, 00:35 UTCMay 15, 01:20 UTC45m
2026-05-09 N91604 - May 9, 18:40 UTCMay 9, 19:35 UTC55m
2026-05-09 N91604 - May 9, 16:10 UTCMay 9, 17:05 UTC55m
2026-05-01 N91604 MER → RBK May 1, 23:45 UTCMay 2, 02:00 UTC2h 15m
2026-05-01 N91604 - May 1, 20:35 UTCMay 1, 22:45 UTC2h 10m
2026-04-27 N91604 - Apr 27, 23:30 UTCApr 28, 00:25 UTC55m
2026-04-25 N91604 - Apr 25, 01:00 UTCApr 25, 01:55 UTC55m
2026-04-24 N91604 - Apr 24, 23:35 UTCApr 25, 00:25 UTC50m
2026-04-23 N91604 - Apr 23, 22:25 UTCApr 23, 22:45 UTC20m
2026-04-23 N91604 - Apr 23, 14:30 UTCApr 23, 14:50 UTC20m
2026-04-17 N91604 RBK → RBK Apr 17, 00:10 UTCApr 17, 00:44 UTC35m
2026-04-16 N91604 - Apr 16, 18:10 UTCApr 16, 19:00 UTC50m
2026-04-16 N91604 - Apr 16, 17:35 UTCApr 16, 17:54 UTC20m

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 N91604 page for operator, model, and routing details .

Mode-S ACAF6A frequently asked

What is Mode-S code ACAF6A?
ACAF6A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N91604.
Where is Mode-S ACAF6A registered?
Mode-S code ACAF6A 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 ACAF6A broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 20:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACAF6A, octal 53127552, decimal 11,317,098.
What flights does ACAF6A operate?
Mode-S ACAF6A has broadcast 1 distinct callsign, including N91604.