Martech Zone Apps

App: DNS Propagation Checker

DNS propagation is the process by which changes to DNS records are distributed and updated across the internet. When a domain name’s DNS records are modified, such as updating the IP address associated with a domain’s A record, these changes need time to be reflected universally. DNS propagation can take some time, ranging from a few minutes to several hours, depending on factors like TTL (Time to Live) settings and DNS caching.

During this propagation period, different DNS servers across the internet gradually update their cached information to reflect the new DNS records, ensuring consistent access to the updated resources. DNS propagation sometimes confuses users because a visitor in one geographic region may see the updated DNS while another sees the original settings that are still propagating.

Here’s a tool to check to see if the same A Records are returned across critical DNS servers and regional DNS servers:

Retrieve A Records

Here are the lists of global and retional DNS servers we check:

Global DNS Networks

  • AdGuard DNS
  • Alternate DNS
  • CleanBrowsing
  • Comodo Secure DNS
  • Control D
  • Cloudflare
  • DNS.Watch
  • Google DNS
  • NextDNS
  • OpenDNS
  • OpenNIC
  • Quad 9
  • Ultimate Hosts Blacklist
  • Verisign
  • Yandex

Regional DNS Servers

  • Australia - Sydney
  • Brazil - São Paulo
  • Canada - Vancouver
  • Canada - Montreal
  • China - Hangzhou
  • India - Delhi
  • Israel - Jerusalem
  • Japan - Tokyo
  • United States - Boston
  • United States - Indianapolis
  • United States - Denver
  • United States - Los Angeles
  • The Netherlands - Rotterdam
  • Russia - Moscow
  • South Africa - Cape Town
  • Ukraine - Kyiv
  • United Arab Emerites - Dubai
  • United Kingdom - London

Douglas Karr

Douglas Karr is CMO of OpenINSIGHTS and the founder of the Martech Zone. Douglas has helped dozens of successful MarTech startups, has assisted in the due diligence of over $5 bil in Martech acquisitions and investments, and continues to assist companies in implementing and automating their sales and marketing strategies. Douglas is an internationally recognized digital transformation and MarTech expert and speaker. Douglas is also a published author of a Dummie's guide and a business leadership book.

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