Cases1 case

1 to 1 of 1

1. IL-0260 zoom.us stopped resolving for about two hours after GoDaddy Registry placed a server block on the domain

   Zoom2025

   Symptoms

   On 16 April 2025 customers in the US and International regions could not reach Zoom services because lookups of the zoom.us domain failed. Starting, joining or scheduling a meeting needs a DNS lookup, so none of those actions completed; people already in a Zoom meeting or on a Zoom Phone call were not affected.

   DNS resolution failuresService outage

   Trigger

   A communication error between Zoom's domain registrar, Markmonitor, and GoDaddy Registry led GoDaddy Registry to place a server block on zoom.us by mistake, which shut the domain down.

   Root cause

   Dependency failure

   Component

   Authoritative DNS servers and records

   Contributing factor

   No safeguard on destructive change

   Remediation

   • Identified and removed the server block on zoom.us together with Markmonitor and GoDaddy
   • Asked users who still had connection problems to flush their DNS cache and reconnect

   Action items

   • Put a registry lock on zoom.us that restricts server block commands on the domain
   • Implement additional technical changes and processes with GoDaddy Registry and Markmonitor so the issue does not recur

   View case

By root cause1