>> dns itself is purely eight bit transparent. one can even have a dot as >> a non-separator. p.r.c could be a tld. it's strictly length/value. > That's true, but there is no standard character representation for > octet values 128 - 255.
utf-8 is the one used in the ietf community. > Only octets in the range from 65 to 90 (uppercase) and 977 to 122 > (lowercase) have a case equivalent for DNS resolution. dns resolution is eight bit clear. randy