WorldNIC nameserver issues

We're seeing a number of issues with WorldNIC nameservers failing from multiple points on our network this morning and was wondering if anyone was seeing similar problems. We're seeing issues with: ns47.worldnic.com (domain: cpurocket.com) ns48.worldnic.com (domain: cpurocket.com) ns87.worldnic.com (domain insightcollect.com) ns88.worldnic.com (domain insightcollect.com) and many many more... Anyone else seeing these failures? WorldNIC does a lot of authoritative DNS.... -david