Hello, if RIPE assigns an large ip net to an ISP - Does RIPE accept, that this ISP ignores RFC 1921, 2.1 [1] (for commercial interests)? Are commercial interests a valid reason [2] for RIPE, that an ISP does not set (generic) PTR records for an used IP? Does or does not RIPE claim the compliance with (basic) RFCs (like RFC 1921, 2.1 - I think it is a basic, that every IP must have a correct PTR record.) for assigned IP nets? I hope, I found the correct mailing list for my question. If this the wrong list, which should I use for my question? Best regards, thomas polnik. [1] 2.1 Inconsistent, Missing, or Bad Data Every Internet-reachable host should have a name. The consequences of this are becoming more and more obvious. Many services available on the Internet will not talk to you if you aren't correctly registered in the DNS. Make sure your PTR and A records match. For every IP address, there should be a matching PTR record in the in-addr.arpa domain. [...] [2] RFC 2119 [...] 3. SHOULD This word, or the adjective "RECOMMENDED", mean that there may exist valid reasons in particular circumstances to ignore a particular item, but the full implications must be understood and carefully weighed before choosing a different course. [...]