sensors Mode-S transponder

0201A1

ICAO 24-bit transponder address · allocated to Morocco

Currently assigned to CN-RHC · BOEING 737 MAX 8

Hex
0201A1
Octal
00400641
Decimal
131,489
Country
MA
Tail
CN-RHC
Type
B38M
No current signal · last broadcast 1d ago
Flights observed
5
Distinct callsigns
4
Country
MA
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 0201A1.

Country allocation

The ICAO 24-bit address 0201A1 falls within the block assigned to Morocco (MA) by ICAO Annex 10, Volume III. Every aircraft registered in Morocco 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 4 distinct

Callsign Airline Flights Last seen
RAM970H - 2 2026-04-13
RAM971H - 1 2026-04-13
RAM939 - 1 2026-04-12
RAM265 - 1 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 RAM971H - Apr 13, 18:35 UTCApr 13, 19:35 UTC1h 0m
2026-04-13 RAM970H - Apr 13, 16:15 UTCApr 13, 17:15 UTC1h 0m
2026-04-13 RAM970H - Apr 13, 16:00 UTCApr 13, 16:15 UTC15m
2026-04-13 RAM265 - Apr 13, 01:40 UTCApr 13, 02:25 UTC45m
2026-04-12 RAM939 - Apr 12, 17:15 UTCApr 12, 19:10 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 CN-RHC page for operator, model, and routing details .

Mode-S 0201A1 frequently asked

What is Mode-S code 0201A1?
0201A1 is an ICAO 24-bit transponder address. Allocated to Morocco. Assigned to CN-RHC.
Where is Mode-S 0201A1 registered?
Mode-S code 0201A1 is allocated to Morocco (MA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0201A1 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0201A1, octal 00400641, decimal 131,489.
What flights does 0201A1 operate?
Mode-S 0201A1 has broadcast 4 distinct callsigns, including RAM970H, RAM971H, RAM939, RAM265.