I've noticed in the SIP responses coming through our termination LCR a few that mention calls blocked due to DNIS listed on the Do Not Call Registry. I've also seen DNC blocking mentioned in other robocall blocking contexts. I understand the benefit in doing this, but I don't understand how carriers are able to use the DNC this way. Is there some exemption to the DNC rules that permit this use case? The rules as they are written on the DNC website indicate that I would need an active Subscriber Account Number from each of my clients in order to perform any kind of DNC filtering, with controls to ensure each client is only dipping the area codes they are paying for. Is using the DNC across an entire network for robocall blocking actually a misuse of the DNC? Calvin Ellison Systems Architect calvin.ellison at voxox.com +1 (213) 285-0555 <http://voxox.com> <https://www.facebook.com/VOXOX/> <https://www.instagram.com/voxoxofficial/> <https://www.linkedin.com/company/3573541/admin/> <https://twitter.com/Voxox> The information contained herein is confidential and privileged information or work product intended only for the individual or entity to whom it is addressed. Any unauthorized use, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify me immediately.