; dig +trace +additional example.com A ; example.com. A com. 172800 IN NS i.gtld-servers.net. com. 172800 IN NS a.gtld-servers.net. com. 172800 IN NS c.gtld-servers.net. com. 172800 IN NS e.gtld-servers.net. com. 172800 IN NS l.gtld-servers.net. com. 172800 IN NS m.gtld-servers.net. com. 172800 IN NS f.gtld-servers.net. com. 172800 IN NS b.gtld-servers.net. com. 172800 IN NS j.gtld-servers.net. com. 172800 IN NS g.gtld-servers.net. com. 172800 IN NS d.gtld-servers.net. com. 172800 IN NS h.gtld-servers.net. com. 172800 IN NS k.gtld-servers.net. m.gtld-servers.net. 172800 IN A 192.55.83.30 l.gtld-servers.net. 172800 IN A 192.41.162.30 k.gtld-servers.net. 172800 IN A 192.52.178.30 j.gtld-servers.net. 172800 IN A 192.48.79.30 i.gtld-servers.net. 172800 IN A 192.43.172.30 h.gtld-servers.net. 172800 IN A 192.54.112.30 g.gtld-servers.net. 172800 IN A 192.42.93.30 f.gtld-servers.net. 172800 IN A 192.35.51.30 e.gtld-servers.net. 172800 IN A 192.12.94.30 d.gtld-servers.net. 172800 IN A 192.31.80.30 c.gtld-servers.net. 172800 IN A 192.26.92.30 b.gtld-servers.net. 172800 IN A 192.33.14.30 a.gtld-servers.net. 172800 IN A 192.5.6.30 m.gtld-servers.net. 172800 IN AAAA 2001:501:b1f9::30 l.gtld-servers.net. 172800 IN AAAA 2001:500:d937::30 k.gtld-servers.net. 172800 IN AAAA 2001:503:d2d::30 j.gtld-servers.net. 172800 IN AAAA 2001:502:7094::30 i.gtld-servers.net. 172800 IN AAAA 2001:503:39c1::30 h.gtld-servers.net. 172800 IN AAAA 2001:502:8cc::30 g.gtld-servers.net. 172800 IN AAAA 2001:503:eea3::30 f.gtld-servers.net. 172800 IN AAAA 2001:503:d414::30 e.gtld-servers.net. 172800 IN AAAA 2001:502:1ca1::30 d.gtld-servers.net. 172800 IN AAAA 2001:500:856e::30 c.gtld-servers.net. 172800 IN AAAA 2001:503:83eb::30 b.gtld-servers.net. 172800 IN AAAA 2001:503:231d::2:30 a.gtld-servers.net. 172800 IN AAAA 2001:503:a83e::2:30 ;; Received from c.root-servers.net. (192.33.4.12) for . in 14.4ms, NOERROR example.com. 172800 IN NS hera.ns.cloudflare.com. example.com. 172800 IN NS elliott.ns.cloudflare.com. hera.ns.cloudflare.com. 172800 IN A 108.162.192.162 hera.ns.cloudflare.com. 172800 IN A 172.64.32.162 hera.ns.cloudflare.com. 172800 IN A 173.245.58.162 hera.ns.cloudflare.com. 172800 IN AAAA 2606:4700:50::adf5:3aa2 hera.ns.cloudflare.com. 172800 IN AAAA 2803:f800:50::6ca2:c0a2 hera.ns.cloudflare.com. 172800 IN AAAA 2a06:98c1:50::ac40:20a2 elliott.ns.cloudflare.com. 172800 IN A 108.162.195.228 elliott.ns.cloudflare.com. 172800 IN A 162.159.44.228 elliott.ns.cloudflare.com. 172800 IN A 172.64.35.228 elliott.ns.cloudflare.com. 172800 IN AAAA 2606:4700:58::a29f:2ce4 elliott.ns.cloudflare.com. 172800 IN AAAA 2803:f800:50::6ca2:c3e4 elliott.ns.cloudflare.com. 172800 IN AAAA 2a06:98c1:50::ac40:23e4 ;; Received from c.gtld-servers.net. (192.26.92.30) for com. in 89.6ms, NOERROR example.com. 300 IN A 104.20.23.154 example.com. 300 IN A 172.66.147.243 ;; Received from elliott.ns.cloudflare.com. (172.64.35.228) for example.com. in 11.6ms, NOERROR aa ;; authoritative servers for example.com. ;; MATCH elliott.ns.cloudflare.com. 172.64.35.228 NOERROR serial 2415555295 8.7ms 104.20.23.154 172.66.147.243 ;; MATCH hera.ns.cloudflare.com. 173.245.58.162 NOERROR serial 2415555295 12.3ms 104.20.23.154 172.66.147.243 ;; public resolvers ;; MATCH Cloudflare 1.1.1.1 NOERROR ttl 37 8.5ms 104.20.23.154 172.66.147.243 ;; MATCH Google 8.8.8.8 NOERROR ttl 26 9.9ms 104.20.23.154 172.66.147.243 ;; MATCH Quad9 9.9.9.9 NOERROR ttl 114 9.5ms 104.20.23.154 172.66.147.243 ;; MATCH OpenDNS 208.67.222.222 NOERROR ttl 128 8.2ms 104.20.23.154 172.66.147.243 PASS Authoritative answer: 104.20.23.154, 172.66.147.243 From the servers for example.com., TTL 5m 0s. This is what every resolver converges on. PASS Delegation: 2 nameservers The parent zone and the zone itself list the same nameservers. INFO Glue: not needed The nameservers live in another zone, so the parent does not need to hand out addresses for them; stale glue cannot happen here. PASS Authoritative servers: 2 of 2 answered Every nameserver in the delegation responded. PASS Zone serial: 2415555295 on every server All nameservers hold the same version of the zone. PASS Public resolvers: 4 of 4 match Cloudflare, Google, Quad9 and OpenDNS all return the authoritative answer. If a user still sees something else, their ISP's resolver or their own machine is caching it. ;; All 4 resolvers agree with the authoritative servers