The below is largely accurate. Comcast will support the creation of IPv6 PTR for static commercial IPv6 customers when we launch the same. We are currently in trial for dynamic commercial and are expanding our dynamic trials. Static IPv6 trials will be starting soon, hopefully November. John Date: Wed, 9 Oct 2013 11:41:50 -0500 From: Chris Adams <cma@cmadams.net> To: nanog@nanog.org Subject: Re: comcast ipv6 PTR Message-ID: <20131009164150.GG1193@cmadams.net> Content-Type: text/plain; charset=us-ascii Once upon a time, Blair Trosper <blair.trosper@gmail.com> said:

Does anyone know why (or can someone from Comcast explain why) there is no PTR on their residential/business IPv6 addresses?

I believe business customers (with a static assignment) can request reverse DNS entries. Residential customers are not guaranteed a static assignment, so they can't get reverse set. -- Chris Adams <cma@cmadams.net>