Apparatus

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sensors Mode-S transponder

ACB4F9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N918G · PIPER PA-28-140/150/160/180 · operated by ARCHER FLIGHT LLC

Hex
ACB4F9
Octal
53132371
Decimal
11,318,521
Country
US
Tail
N918G
Type
P28A
No current signal · last broadcast 20h ago
Flights observed
98
Distinct callsigns
1
Country
US
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S ACB4F9.

Country allocation

The ICAO 24-bit address ACB4F9 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
CXK438 - 97 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CXK438 - Jul 17, 11:00 UTCJul 17, 12:25 UTC1h 25m
2026-07-14 CXK438 ORF → ORF Jul 14, 09:30 UTCJul 14, 11:00 UTC1h 30m
2026-07-13 CXK438 USA → ORF Jul 13, 15:35 UTCJul 13, 18:00 UTC2h 25m
2026-07-11 CXK438 - Jul 11, 12:50 UTCJul 11, 13:55 UTC1h 5m
2026-07-08 CXK438 - Jul 8, 19:45 UTCJul 8, 20:00 UTC15m
2026-07-08 CXK438 - Jul 8, 18:00 UTCJul 8, 18:30 UTC30m
2026-07-08 CXK438 - Jul 8, 15:20 UTCJul 8, 16:55 UTC1h 35m
2026-06-30 CXK438 USA → USA Jun 30, 17:55 UTCJun 30, 19:25 UTC1h 30m
2026-06-30 CXK438 - Jun 30, 14:55 UTCJun 30, 16:40 UTC1h 45m
2026-06-30 CXK438 - Jun 30, 12:15 UTCJun 30, 13:55 UTC1h 40m
2026-06-30 CXK438 - Jun 30, 00:30 UTCJun 30, 00:49 UTC20m
2026-06-29 CXK438 - Jun 29, 23:34 UTCJun 29, 23:54 UTC20m
2026-06-29 CXK438 - Jun 29, 20:30 UTCJun 29, 22:10 UTC1h 40m
2026-06-29 CXK438 - Jun 29, 17:59 UTCJun 29, 19:24 UTC1h 25m
2026-06-29 CXK438 - Jun 29, 15:30 UTCJun 29, 17:05 UTC1h 35m
2026-06-26 CXK438 - Jun 26, 14:39 UTCJun 26, 17:25 UTC2h 45m
2026-06-25 CXK438 - Jun 25, 17:30 UTCJun 25, 18:59 UTC1h 30m
2026-06-25 CXK438 - Jun 25, 16:24 UTCJun 25, 16:45 UTC20m
2026-06-25 CXK438 - Jun 25, 13:59 UTCJun 25, 14:34 UTC35m
2026-06-25 CXK438 - Jun 25, 13:05 UTCJun 25, 13:24 UTC20m
2026-06-25 CXK438 - Jun 25, 10:55 UTCJun 25, 11:35 UTC40m
2026-06-24 CXK438 - Jun 24, 23:04 UTCJun 25, 00:40 UTC1h 35m
2026-06-24 CXK438 - Jun 24, 17:40 UTCJun 24, 18:15 UTC35m
2026-06-24 CXK438 - Jun 24, 14:15 UTCJun 24, 15:54 UTC1h 40m
2026-06-23 CXK438 - Jun 23, 13:09 UTCJun 23, 14:19 UTC1h 10m
2026-06-22 CXK438 - Jun 22, 17:40 UTCJun 22, 18:04 UTC25m
2026-06-22 CXK438 - Jun 22, 15:29 UTCJun 22, 15:50 UTC20m
2026-06-22 CXK438 - Jun 22, 13:10 UTCJun 22, 14:40 UTC1h 30m
2026-06-22 CXK438 - Jun 22, 09:49 UTCJun 22, 11:19 UTC1h 30m
2026-06-21 CXK438 - Jun 21, 15:34 UTCJun 21, 16:49 UTC1h 15m
2026-06-20 CXK438 - Jun 20, 20:45 UTCJun 20, 21:40 UTC55m
2026-06-20 CXK438 - Jun 20, 10:34 UTCJun 20, 12:09 UTC1h 35m
2026-06-18 CXK438 - Jun 18, 15:50 UTCJun 18, 17:15 UTC1h 25m
2026-06-18 CXK438 - Jun 18, 12:05 UTCJun 18, 13:45 UTC1h 40m
2026-06-17 CXK438 - Jun 17, 18:30 UTCJun 17, 19:50 UTC1h 20m
2026-06-16 CXK438 - Jun 16, 18:29 UTCJun 16, 19:00 UTC30m
2026-06-16 CXK438 - Jun 16, 16:30 UTCJun 16, 17:15 UTC45m
2026-06-16 CXK438 - Jun 16, 11:45 UTCJun 16, 12:39 UTC55m
2026-06-15 CXK438 - Jun 15, 18:20 UTCJun 15, 18:50 UTC30m
2026-06-15 CXK438 - Jun 15, 17:15 UTCJun 15, 17:40 UTC25m
2026-06-13 CXK438 - Jun 13, 14:15 UTCJun 13, 15:40 UTC1h 25m
2026-06-12 CXK438 - Jun 12, 15:30 UTCJun 12, 17:20 UTC1h 50m
2026-06-12 CXK438 - Jun 12, 12:40 UTCJun 12, 13:30 UTC50m
2026-06-11 CXK438 - Jun 11, 22:00 UTCJun 11, 23:05 UTC1h 5m
2026-06-11 CXK438 - Jun 11, 12:45 UTCJun 11, 14:35 UTC1h 50m
2026-06-10 CXK438 - Jun 10, 20:55 UTCJun 10, 22:30 UTC1h 35m
2026-06-09 CXK438 - Jun 9, 19:00 UTCJun 9, 20:00 UTC1h 0m
2026-06-08 CXK438 - Jun 8, 22:10 UTCJun 8, 23:45 UTC1h 35m
2026-06-08 CXK438 - Jun 8, 18:25 UTCJun 8, 19:35 UTC1h 10m
2026-06-08 CXK438 - Jun 8, 15:04 UTCJun 8, 15:55 UTC50m

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 N918G page for operator, model, and routing details .

Mode-S ACB4F9 frequently asked

What is Mode-S code ACB4F9?
ACB4F9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N918G.
Where is Mode-S ACB4F9 registered?
Mode-S code ACB4F9 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 ACB4F9 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACB4F9, octal 53132371, decimal 11,318,521.
What flights does ACB4F9 operate?
Mode-S ACB4F9 has broadcast 1 distinct callsign, including CXK438.