ISP DNS cache refresh
ISP DNS cache refresh instantly clears cached DNS records from China Telecom's DNS servers on demand, bypassing TTL wait times so your DNS changes take effect immediately.
Use cases
Use this feature when you need DNS changes to take effect quickly, such as after updating a DNS record or during a disaster recovery failover.
When you change a DNS record, propagation can be delayed by factors such as Time-to-Live (TTL) settings and unexpired ISP DNS caches. This feature instantly clears the local cache on China Telecom's DNS servers, forcing them to fetch the latest DNS records for faster resolution across the China Telecom network.
Flushing the DNS cache for China Telecom does not guarantee internet-wide propagation. This service only clears the cache and speeds up propagation on China Telecom's DNS servers. You cannot use this service to flush the cache of other ISPs or public DNS.
This service cannot be used for domains that are subject to regulatory penalties from Chinese administrative authorities.
Billing
This service is pay-per-use and requires a resource plan. Each flush costs 7,000 RMB.
Purchase a resource plan on the DNS Cache Flush for China Telecom page.
Refund policy
Unused resource plans are eligible for a no-questions-asked refund within 5 days of purchase. To request a refund, go to the Expenses and Costs console.
You cannot receive a refund if the resource plan was purchased more than 5 days ago or has been used.
Procedure
Go to the Cloud DNS-ISP DNS Cache Refresh page.
Choose the DNS Cache Refresh tab.
Enter the target domain name and click Click to Refresh.
ImportantOnly the exact domain name is flushed. Subdomains and wildcards are not supported. For example, you can enter
example.com,www.example.com, orwww.test.example.com.In the Refresh Tasks section, check the Task Status column to verify that the flush completed successfully.
To check whether the changes have taken effect on carrier DNS servers, click DNS propagation check (China-wide).