Apparatus

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sensors Mode-S transponder

AC218F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N881AC · CESSNA 172 Skyhawk · operated by FLY TWIN COMANCHE LLC

Hex
AC218F
Octal
53020617
Decimal
11,280,783
Country
US
Tail
N881AC
Type
C172
No current signal · last broadcast 5h ago
Flights observed
336
Distinct callsigns
1
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S AC218F.

Country allocation

The ICAO 24-bit address AC218F 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
N881AC - 336 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 N881AC GYR → GYR Jul 18, 03:50 UTCJul 18, 06:35 UTC2h 45m
2026-07-17 N881AC GYR → GYR Jul 17, 13:29 UTCJul 17, 14:20 UTC50m
2026-07-16 N881AC GYR → GYR Jul 16, 17:40 UTCJul 16, 18:29 UTC50m
2026-07-16 N881AC GYR → GYR Jul 16, 15:55 UTCJul 16, 16:55 UTC1h 0m
2026-07-16 N881AC GYR → GYR Jul 16, 13:54 UTCJul 16, 14:40 UTC45m
2026-07-15 N881AC GYR → GYR Jul 15, 17:45 UTCJul 15, 18:40 UTC55m
2026-07-15 N881AC GYR → GYR Jul 15, 15:40 UTCJul 15, 16:35 UTC55m
2026-07-15 N881AC GYR → GYR Jul 15, 13:45 UTCJul 15, 14:50 UTC1h 5m
2026-07-15 N881AC GYR → GYR Jul 15, 12:20 UTCJul 15, 13:00 UTC40m
2026-07-14 N881AC GYR → GYR Jul 14, 19:55 UTCJul 14, 20:45 UTC50m
2026-07-14 N881AC GYR → GYR Jul 14, 17:50 UTCJul 14, 18:20 UTC30m
2026-07-14 N881AC GYR → GYR Jul 14, 15:35 UTCJul 14, 16:50 UTC1h 15m
2026-07-14 N881AC GYR → GYR Jul 14, 13:45 UTCJul 14, 14:45 UTC1h 0m
2026-07-13 N881AC GYR → GYR Jul 13, 19:30 UTCJul 13, 20:45 UTC1h 15m
2026-07-13 N881AC GYR → GYR Jul 13, 15:55 UTCJul 13, 16:45 UTC50m
2026-07-13 N881AC GYR → GYR Jul 13, 13:20 UTCJul 13, 14:45 UTC1h 25m
2026-07-12 N881AC GYR → GYR Jul 12, 14:10 UTCJul 12, 14:50 UTC40m
2026-07-11 N881AC GYR → GYR Jul 11, 17:30 UTCJul 11, 18:50 UTC1h 20m
2026-07-11 N881AC GYR → GYR Jul 11, 14:05 UTCJul 11, 15:50 UTC1h 45m
2026-07-10 N881AC GYR → GYR Jul 10, 16:30 UTCJul 10, 17:45 UTC1h 15m
2026-07-09 N881AC - Jul 9, 22:55 UTCJul 9, 23:00 UTC5m
2026-07-09 N881AC - Jul 9, 14:15 UTCJul 9, 14:20 UTC5m
2026-07-09 N881AC GYR → GYR Jul 9, 13:00 UTCJul 9, 13:35 UTC35m
2026-07-09 N881AC - Jul 9, 07:15 UTCJul 9, 07:20 UTC5m
2026-07-09 N881AC - Jul 9, 07:00 UTCJul 9, 07:05 UTC5m
2026-07-09 N881AC GYR → GYR Jul 9, 06:45 UTCJul 9, 06:50 UTC5m
2026-07-09 N881AC GYR → GYR Jul 9, 01:45 UTCJul 9, 02:25 UTC40m
2026-07-08 N881AC GYR → GYR Jul 8, 15:20 UTCJul 8, 16:15 UTC55m
2026-07-08 N881AC GYR → GYR Jul 8, 13:45 UTCJul 8, 14:35 UTC50m
2026-07-07 N881AC GYR → GYR Jul 7, 19:00 UTCJul 7, 20:35 UTC1h 35m
2026-07-07 N881AC GYR → GYR Jul 7, 16:35 UTCJul 7, 17:35 UTC1h 0m
2026-07-07 N881AC GYR → GYR Jul 7, 13:35 UTCJul 7, 14:50 UTC1h 15m
2026-07-07 N881AC GYR → GYR Jul 7, 09:15 UTCJul 7, 11:15 UTC2h 0m
2026-07-06 N881AC GYR → GYR Jul 6, 16:45 UTCJul 6, 17:50 UTC1h 5m
2026-07-06 N881AC GYR → GYR Jul 6, 13:50 UTCJul 6, 14:35 UTC45m
2026-07-06 N881AC GYR → GYR Jul 6, 09:35 UTCJul 6, 11:30 UTC1h 55m
2026-07-05 N881AC GYR → GYR Jul 5, 14:40 UTCJul 5, 15:50 UTC1h 10m
2026-07-05 N881AC GYR → GYR Jul 5, 12:40 UTCJul 5, 13:50 UTC1h 10m
2026-07-05 N881AC LUF → GYR Jul 5, 04:15 UTCJul 5, 04:35 UTC20m
2026-07-05 N881AC - Jul 5, 03:05 UTCJul 5, 04:10 UTC1h 5m
2026-07-04 N881AC GYR → GYR Jul 4, 15:40 UTCJul 4, 16:55 UTC1h 15m
2026-07-04 N881AC GYR → GYR Jul 4, 13:30 UTCJul 4, 14:40 UTC1h 10m
2026-07-03 N881AC - Jul 3, 20:45 UTCJul 3, 21:05 UTC20m
2026-07-03 N881AC - Jul 3, 16:35 UTCJul 3, 16:45 UTC10m
2026-07-03 N881AC GYR → GYR Jul 3, 15:20 UTCJul 3, 15:55 UTC35m
2026-07-03 N881AC GYR → GYR Jul 3, 11:30 UTCJul 3, 12:50 UTC1h 20m
2026-07-02 N881AC - Jul 2, 18:15 UTCJul 2, 19:20 UTC1h 5m
2026-07-02 N881AC GYR → GYR Jul 2, 15:45 UTCJul 2, 16:45 UTC1h 0m
2026-07-02 N881AC GYR → GYR Jul 2, 14:20 UTCJul 2, 14:55 UTC35m
2026-07-02 N881AC GYR → GYR Jul 2, 11:45 UTCJul 2, 12:35 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 N881AC page for operator, model, and routing details .

Mode-S AC218F frequently asked

What is Mode-S code AC218F?
AC218F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N881AC.
Where is Mode-S AC218F registered?
Mode-S code AC218F 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 AC218F broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC218F, octal 53020617, decimal 11,280,783.
What flights does AC218F operate?
Mode-S AC218F has broadcast 1 distinct callsign, including N881AC.