Apparatus

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sensors Mode-S transponder

A1D149

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N216RF · operated by RANDIGO LLC

Hex
A1D149
Octal
50350511
Decimal
10,604,873
Country
US
Tail
N216RF
Type
C208
No current signal · last broadcast 11d ago
Flights observed
111
Distinct callsigns
1
Country
US
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S A1D149.

Country allocation

The ICAO 24-bit address A1D149 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
N216RF - 111 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N216RF - Jul 26, 19:40 UTCJul 26, 21:15 UTC1h 35m
2026-07-26 N216RF - Jul 26, 14:15 UTCJul 26, 18:00 UTC3h 45m
2026-07-25 N216RF AUS → AUS Jul 25, 18:00 UTCJul 25, 21:50 UTC3h 50m
2026-07-24 N216RF AUS → AUS Jul 24, 17:35 UTCJul 24, 22:00 UTC4h 25m
2026-07-23 N216RF - Jul 23, 13:30 UTCJul 23, 17:45 UTC4h 15m
2026-07-22 N216RF - Jul 22, 19:35 UTCJul 22, 20:40 UTC1h 5m
2026-07-22 N216RF - Jul 22, 14:10 UTCJul 22, 18:20 UTC4h 10m
2026-07-21 N216RF - Jul 21, 23:00 UTCJul 21, 23:20 UTC20m
2026-07-21 N216RF - Jul 21, 20:05 UTCJul 21, 20:50 UTC45m
2026-07-21 N216RF - Jul 21, 17:40 UTCJul 21, 18:00 UTC20m
2026-07-21 N216RF - Jul 21, 14:05 UTCJul 21, 15:40 UTC1h 35m
2026-07-20 N216RF - Jul 20, 23:00 UTCJul 20, 23:10 UTC10m
2026-07-20 N216RF - Jul 20, 17:50 UTCJul 20, 20:25 UTC2h 35m
2026-07-19 N216RF - Jul 19, 17:55 UTCJul 19, 19:20 UTC1h 25m
2026-07-19 N216RF - Jul 19, 16:55 UTCJul 19, 17:25 UTC30m
2026-07-19 N216RF - Jul 19, 13:40 UTCJul 19, 14:45 UTC1h 5m
2026-07-18 N216RF - Jul 18, 15:30 UTCJul 18, 16:10 UTC40m
2026-07-17 N216RF HSV → SUS Jul 17, 11:55 UTCJul 17, 14:00 UTC2h 5m
2026-07-16 N216RF - Jul 16, 15:05 UTCJul 16, 15:19 UTC15m
2026-07-05 N216RF - Jul 5, 13:55 UTCJul 5, 15:55 UTC2h 0m
2026-07-04 N216RF - Jul 4, 23:15 UTCJul 4, 23:30 UTC15m
2026-07-04 N216RF - Jul 4, 19:35 UTCJul 4, 21:25 UTC1h 50m
2026-07-03 N216RF - Jul 3, 19:00 UTCJul 3, 20:30 UTC1h 30m
2026-07-02 N216RF - Jul 2, 17:10 UTCJul 2, 20:45 UTC3h 35m
2026-07-01 N216RF - Jul 1, 15:05 UTCJul 1, 19:45 UTC4h 40m
2026-06-30 N216RF - Jun 30, 22:55 UTCJul 1, 02:30 UTC3h 35m
2026-06-30 N216RF - Jun 30, 20:25 UTCJun 30, 21:05 UTC40m
2026-06-30 N216RF - Jun 30, 18:05 UTCJun 30, 18:40 UTC35m
2026-06-30 N216RF - Jun 30, 16:35 UTCJun 30, 17:05 UTC30m
2026-06-30 N216RF - Jun 30, 14:55 UTCJun 30, 16:00 UTC1h 5m
2026-06-30 N216RF - Jun 30, 12:45 UTCJun 30, 13:45 UTC1h 0m
2026-06-29 N216RF - Jun 29, 22:24 UTCJun 29, 23:34 UTC1h 10m
2026-06-28 N216RF - Jun 28, 22:39 UTCJun 29, 00:14 UTC1h 35m
2026-06-28 N216RF - Jun 28, 18:05 UTCJun 28, 20:29 UTC2h 25m
2026-06-28 N216RF - Jun 28, 15:49 UTCJun 28, 17:34 UTC1h 45m
2026-06-28 N216RF - Jun 28, 00:00 UTCJun 28, 00:50 UTC50m
2026-06-27 N216RF - Jun 27, 22:35 UTCJun 27, 23:04 UTC30m
2026-06-27 N216RF - Jun 27, 20:34 UTCJun 27, 20:55 UTC20m
2026-06-25 N216RF - Jun 25, 23:24 UTCJun 25, 23:59 UTC35m
2026-06-25 N216RF - Jun 25, 19:34 UTCJun 25, 20:54 UTC1h 20m
2026-06-25 N216RF - Jun 25, 18:04 UTCJun 25, 18:39 UTC35m
2026-06-25 N216RF - Jun 25, 17:14 UTCJun 25, 17:25 UTC10m
2026-06-25 N216RF - Jun 25, 14:04 UTCJun 25, 16:24 UTC2h 20m
2026-06-24 N216RF - Jun 24, 23:24 UTCJun 25, 01:19 UTC1h 55m
2026-06-24 N216RF - Jun 24, 17:29 UTCJun 24, 17:59 UTC30m
2026-06-24 N216RF - Jun 24, 15:00 UTCJun 24, 15:14 UTC15m
2026-06-23 N216RF - Jun 23, 23:19 UTCJun 23, 23:44 UTC25m
2026-06-22 N216RF - Jun 22, 19:00 UTCJun 22, 19:24 UTC25m
2026-06-22 N216RF - Jun 22, 16:05 UTCJun 22, 18:24 UTC2h 20m
2026-06-21 N216RF - Jun 21, 23:44 UTCJun 22, 00:20 UTC35m

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 N216RF page for operator, model, and routing details .

Mode-S A1D149 frequently asked

What is Mode-S code A1D149?
A1D149 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N216RF.
Where is Mode-S A1D149 registered?
Mode-S code A1D149 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 A1D149 broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1D149, octal 50350511, decimal 10,604,873.
What flights does A1D149 operate?
Mode-S A1D149 has broadcast 1 distinct callsign, including N216RF.