We've received a 2nd IPv4 /24 subnet from ARIN for our 2nd anycast DNS network. Both our /24 subnets were obtained quickly under the NRPM 4.10 policy for IPv6 deployment for our dual stack DNS use case. 2nd was obtained without waiting 6 months due to being a discrete network.

We host our own authoritative DNS servers to provide DNS resolution for our services. Authoritative DNS are the servers queried by DNS resolvers run by your ISP, VPN or an explicitly user chosen one such as Cloudflare or Quad9 DNS. We now have our own AS and IP space for this.

Our ns1 has 11 locations on Vultr: New York City, Miami, Los Angeles, Seattle, London, Frankfurt, Singapore, Mumbai, Tokyo, Sao Paulo and Sydney.

Our ns2 has 4 locations on BuyVM: New York City, Miami, Las Vegas and Bern. We'll be adding a 2nd server provider for more locations.

DNS resolvers quickly fall back to the other network if traffic is dropped. Having two discrete networks with separate hosting companies and transit providers provides very high reliability. Individual servers which go down also stop having traffic routed to them due to BGP.

We have tiny website/network servers and also powerful update mirrors around the world. Our DNS servers use a combination of a GeoIP database and their own location to route users to the closest server that's up. Frequent health checks and low expiry time handle server downtime.