if you go to www.qrz.com and just punch a prefix into the call sign search 
field it'll tell you which country and ITU region it is designated for.

73
Colin, V A6BKX



-----Original Message----- 
From: Pat Byrne
Sent: Tuesday, August 18, 2015 3:07 PM
To: [log in to unmask]
Subject: Re: call sign question

That would be Denmark.
pat, K9JAuAt 04:00 PM 8/18/2015, you wrote:
>Hello all:
>
>Earlier today, I heard a station calling "CQ".  His/Her Morse was pretty
>fast(at limit of my ability), but I managed to copy the prefix OZ1-wish I
>had entire call, but does anyone know what country this prefix belongs to?
>
>Best regards,
>
>
>
>David S. Pearson-wa4dsp
>
>
>---
>This email has been checked for viruses by Avast antivirus software.
>http://www.avast.com