More changes after the dyn ddos attack

Looking at NS records again of all scanned top 500 Alexa domains after the recent Dyn DDoS attack now 13 of the previously 14 Dyn customers which previously relied solely on Dyn now switched away entirely or added additional non-Dyn DNS servers.

Who Switched Entirely

about.com, addthis.com, exoclick.com, github.com/.io, quora.com, speedtest.net, zendesk.com

Who Switched to "Multi"-DNS

etsy.com, paypal.com, shutterstock.com, therverge.com, weebly.com

Details

Here is a summary of the NS record changes. To automatically compare the server names all numbers in the DNS server names having been stripped in the following table:

Site	Before (15.10.)	After (24.10.)
about.com	ns.p.dynect.net.	dns.p.nsone.net.
addthis.com	ns.p.dynect.net.	matt.ns.cloudflare.com. wanda.ns.cloudflare.com.
etsy.com	ns.p.dynect.net.	ns-.awsdns-.co.uk. ns-.awsdns-.com. ns-.awsdns-.net. ns-.awsdns-.org. ns.p.dynect.net.
exoclick.com	ns.p.dynect.net.	dns.p.nsone.net. ns.p.dynect.net.
github.com	ns.p.dynect.net.	ns-.awsdns-.co.uk. ns-.awsdns-.com. ns-.awsdns-.net. ns-.awsdns-.org.
github.io	ns.p.dynect.net.	ns-.awsdns-.co.uk. ns-.awsdns-.com. ns-.awsdns-.net. ns-.awsdns-.org.
paypal.com	ns.p.dynect.net.	ns.p.dynect.net. pdns.ultradns.com. pdns.ultradns.net.
quora.com	ns.p.dynect.net.	ns-.awsdns-.co.uk. ns-.awsdns-.com. ns-.awsdns-.net. ns-.awsdns-.org.
shutterstock.com	ns.p.dynect.net.	a.verisigndns.com. ns.p.dynect.net.
speedtest.net	ns.p.dynect.net.	ns-.awsdns-.co.uk. ns-.awsdns-.com. ns-.awsdns-.net. ns-.awsdns-.org.
theverge.com	ns.p.dynect.net.	ns-.awsdns-.co.uk. ns-.awsdns-.com. ns-.awsdns-.net. ns-.awsdns-.org. ns.p.dynect.net.
weebly.com	ns.p.dynect.net.	ns-.awsdns-.co.uk. ns-.awsdns-.com. ns-.awsdns-.net. ns-.awsdns-.org. ns.p.dynect.net.
zendesk.com	ns.p.dynect.net.	pdns.ultradns.biz. pdns.ultradns.co.uk. pdns.ultradns.com. pdns.ultradns.info. pdns.ultradns.net. pdns.ultradns.org.

The note-worthy non-changer is Twitter which is still exclusively at Dyn, eryone else seems to have mitigated. Some to using two providers, most of them switching to AWS DNS some to UltraDNS exclusively.