Check whether DNS records for a domain have propagated across the world's key resolvers.
The DNS Propagation tool on 101IP checks whether your domain's DNS records have propagated across the world's key resolvers: Google, Cloudflare, Quad9, OpenDNS, AdGuard and Yandex DNS. Queries are executed in parallel via DoH (DNS over HTTPS).
Usually from a few minutes up to 48 hours, depending on the TTL of the old records and the caching policies of resolvers. If all servers still show the old value, wait for the TTL to expire.
Propagation time depends on the TTL (Time to Live) set for the record and the caching policies of internet providers. If TTL was set to 3600 seconds (1 hour), the update can take up to 48 hours in the worst case. Use the DNS Propagation tool on 101IP to track the status in real time and confirm the record has reached key servers such as Google, Cloudflare, and Yandex.
This is normal behaviour called the propagation phase. Each resolver updates its cache independently — Cloudflare may have already fetched the new IP because its TTL expired, while Google's cache is still valid. The tool shows this difference so you can estimate how many servers are still using the old record. Wait a few more hours and re-check — all nodes will eventually synchronise.
When changing hosting, first check the A record (IPv4) and AAAA record (IPv6) since they point to the server IP address. If you use subdomains (e.g. www), also check the CNAME record. For email, always test the MX record — it must point to the new mail server. Select the required record type from the dropdown menu in the tool before running the check.