Content Delivery Networks & Global DNS
Cloudflare Public DNS - AS13335
Cloudflare Secondary DNS - AS13335
Google Public DNS - AS15169
Google Public DNS Secondary - AS15169
Quad9 Secure DNS - AS19281
OpenDNS by Cisco - AS36692
CacheFly CDN Network
Akamai Technologies - AS20940
Fastly Edge Cloud - AS54113
