Free lookups today: 0/10

DNS Propagation Checker

Check a record across global public resolvers and open UK resolvers, and see which ones agree.

Your ISP
Amazon.com, Inc.

Columbus, United States · 216.73.216.223

Enter a domain above to check DNS propagation across resolvers.

Run it yourself — main public resolvers

Copy these into a terminal to check the major providers directly (commands update as you type a domain above):

Cloudflare 1.1.1.1
Google 8.8.8.8
Quad9 9.9.9.9
OpenDNS 208.67.222.222

Known slow resolvers — UK ISPs (often 24-48h)

ISP resolvers cache heavily for millions of customers, so they're the usual reason a change takes a day or two to appear. They only answer their own customers, so they can't be queried from this site — run the command from a device on that network to check one:

Virgin Media

194.168.4.100 · 194.168.8.100

BT

62.6.40.178 · 62.6.40.179

Sky

90.207.238.97 · 90.207.238.101

PlusNet

212.159.6.9 · 212.159.13.49

TalkTalk

195.166.130.1 · 195.166.130.2

EE

212.58.224.1

Or check whatever resolver your device uses (no @ needed):

Global resolvers are anycast, so results are consistent worldwide. UK resolvers are open recursive resolvers from public-dns.info, each probed from our server so only reachable ones are listed; a resolver may still occasionally drop a query.