Apparatus

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sensors Mode-S transponder

A55A06

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N444FR · operated by RAINIER FLIGHT SERVICE LLC

Hex
A55A06
Octal
51255006
Decimal
10,836,486
Country
US
Tail
N444FR
Type
C172
No current signal · last broadcast 14h ago
Flights observed
98
Distinct callsigns
1
Country
US
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S A55A06.

Country allocation

The ICAO 24-bit address A55A06 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
RFS712 - 98 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 RFS712 - Jul 13, 21:50 UTCJul 14, 00:05 UTC2h 15m
2026-07-13 RFS712 - Jul 13, 19:00 UTCJul 13, 20:35 UTC1h 35m
2026-07-13 RFS712 CLM → PAE Jul 13, 03:15 UTCJul 13, 03:50 UTC35m
2026-07-13 RFS712 - Jul 13, 02:25 UTCJul 13, 02:55 UTC30m
2026-07-12 RFS712 - Jul 12, 16:45 UTCJul 12, 18:01 UTC1h 15m
2026-07-11 RFS712 PAE → PAE Jul 11, 23:10 UTCJul 12, 00:25 UTC1h 15m
2026-07-11 RFS712 - Jul 11, 18:50 UTCJul 11, 20:15 UTC1h 25m
2026-07-10 RFS712 - Jul 10, 01:55 UTCJul 10, 02:45 UTC50m
2026-07-09 RFS712 PAE → PAE Jul 9, 17:45 UTCJul 9, 19:05 UTC1h 20m
2026-07-07 RFS712 - Jul 7, 23:10 UTCJul 8, 00:15 UTC1h 5m
2026-07-06 RFS712 - Jul 6, 22:25 UTCJul 6, 23:40 UTC1h 15m
2026-07-05 RFS712 - Jul 5, 20:35 UTCJul 5, 21:55 UTC1h 20m
2026-07-03 RFS712 - Jul 3, 21:50 UTCJul 3, 22:30 UTC40m
2026-06-29 RFS712 - Jun 29, 00:44 UTCJun 29, 01:20 UTC35m
2026-06-28 RFS712 PAE → PAE Jun 28, 21:55 UTCJun 28, 22:34 UTC40m
2026-06-26 RFS712 - Jun 26, 00:50 UTCJun 26, 01:50 UTC1h 0m
2026-06-24 RFS712 - Jun 24, 23:50 UTCJun 25, 00:49 UTC1h 0m
2026-06-23 RFS712 - Jun 23, 22:34 UTCJun 24, 00:20 UTC1h 45m
2026-06-23 RFS712 - Jun 23, 20:15 UTCJun 23, 21:45 UTC1h 30m
2026-06-23 RFS712 - Jun 23, 17:20 UTCJun 23, 19:00 UTC1h 40m
2026-06-22 RFS712 - Jun 22, 22:19 UTCJun 22, 23:10 UTC50m
2026-06-22 RFS712 - Jun 22, 16:20 UTCJun 22, 17:29 UTC1h 10m
2026-06-21 RFS712 - Jun 21, 19:45 UTCJun 21, 21:34 UTC1h 50m
2026-06-21 RFS712 PAE → PAE Jun 21, 18:04 UTCJun 21, 18:44 UTC40m
2026-06-20 RFS712 - Jun 20, 22:45 UTCJun 20, 23:34 UTC50m
2026-06-19 RFS712 - Jun 19, 21:39 UTCJun 19, 23:29 UTC1h 50m
2026-06-19 RFS712 - Jun 19, 00:00 UTCJun 19, 01:39 UTC1h 39m
2026-06-18 RFS712 - Jun 18, 19:45 UTCJun 18, 20:45 UTC1h 0m
2026-06-17 RFS712 - Jun 17, 19:45 UTCJun 17, 20:40 UTC55m
2026-06-17 RFS712 - Jun 17, 16:15 UTCJun 17, 16:45 UTC30m
2026-06-16 RFS712 - Jun 16, 23:20 UTCJun 17, 00:55 UTC1h 35m
2026-06-16 RFS712 - Jun 16, 21:25 UTCJun 16, 22:15 UTC50m
2026-06-15 RFS712 PAE → PAE Jun 15, 17:20 UTCJun 15, 18:45 UTC1h 25m
2026-06-14 RFS712 - Jun 14, 20:50 UTCJun 14, 21:35 UTC45m
2026-06-14 RFS712 - Jun 14, 18:50 UTCJun 14, 19:30 UTC40m
2026-06-14 RFS712 - Jun 14, 00:25 UTCJun 14, 00:35 UTC10m
2026-06-13 RFS712 PAE → PAE Jun 13, 19:55 UTCJun 13, 21:05 UTC1h 10m
2026-06-13 RFS712 - Jun 13, 17:25 UTCJun 13, 18:35 UTC1h 10m
2026-06-12 RFS712 - Jun 12, 23:55 UTCJun 13, 00:45 UTC50m
2026-06-12 RFS712 - Jun 12, 18:50 UTCJun 12, 20:25 UTC1h 35m
2026-06-11 RFS712 - Jun 11, 22:15 UTCJun 11, 23:35 UTC1h 20m
2026-06-11 RFS712 - Jun 11, 19:05 UTCJun 11, 20:35 UTC1h 30m
2026-06-09 RFS712 - Jun 9, 00:55 UTCJun 9, 01:35 UTC40m
2026-06-08 RFS712 - Jun 8, 00:25 UTCJun 8, 01:00 UTC35m
2026-06-07 RFS712 - Jun 7, 22:35 UTCJun 7, 23:10 UTC35m
2026-06-07 RFS712 PAE → PAE Jun 7, 19:10 UTCJun 7, 20:00 UTC50m
2026-06-04 RFS712 - Jun 4, 23:20 UTCJun 5, 00:15 UTC55m
2026-06-03 RFS712 - Jun 3, 00:05 UTCJun 3, 01:00 UTC55m
2026-06-02 RFS712 PAE → PAE Jun 2, 21:50 UTCJun 2, 22:50 UTC1h 0m
2026-06-02 RFS712 - Jun 2, 18:40 UTCJun 2, 20:35 UTC1h 55m

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 N444FR page for operator, model, and routing details .

Mode-S A55A06 frequently asked

What is Mode-S code A55A06?
A55A06 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N444FR.
Where is Mode-S A55A06 registered?
Mode-S code A55A06 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 A55A06 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A55A06, octal 51255006, decimal 10,836,486.
What flights does A55A06 operate?
Mode-S A55A06 has broadcast 1 distinct callsign, including RFS712.