Jack, you are correct. PT is Brazil. The ICAO ident series follows fairly closely the international radio ident series.  It appears that a few countries have more iterations owing to the way they assign these tail numbers. Many use simply all letters and need more 4 letter combinations.  I think Brazil and other countries with expanding general aviation fleets are now using numbers. Not so much for air carriers.

Jeep K3HVG

On 06/12/2022 12:11 PM Jack Antonio <scr287@att.net> wrote:

Question about aircraft registrations, but it is radio related.

What nation uses PT to begin a registration number? If it follows

radio call sign allocations it would be Brazil, just wondering if

aircraft registrations follow the same pattern.

Reason I ask, is I have an aircraft radio which is  marked

with what looks like a registration beginning with PT.

Thanks in advance.

Jack Antonio

WA7DIA

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