bgp.tools being served via 13 authoritative name servers (via 3 different providers + in house NS):
```
$ dig +short ns bgp.tools
ns1.exoscale.ch.
ns-721.awsdns-26.net.
ns-1329.awsdns-38.org.
ns4-35.azure-dns.info.
ns3-35.azure-dns.org.
ns1.exoscale.io.
ns-302.awsdns-37.com.
ns-1799.awsdns-32.co.uk.
ns1.exoscale.net.
ns1-35.azure-dns.com.
ns2-35.azure-dns.net.
ns1.exoscale.com.
backup-ns.bgp.tools.
```

Hacker News