When you update the DNS (Domain Name System) records in your domain name's zone file, it can take up to 48 hours for those updates to propagate throughout the Internet. Your Registrar will strive to make updates as quickly as possible. The DNS propagation time for your domain name depends on several factors that we nor your registrar cannot control.
Factors that affect DNS propagation time include:
- Your ISP (Internet Service Provider) — Your ISP caches DNS records (stores the data locally rather than retrieving fresh data from your DNS server) to speed up Web browsing and reduce traffic, which slows your propagation time. Some ISPs ignore TTL settings and only update their cached records every two to three days.
- Your domain name's registry — If you change your domain name's nameservers, your registrar will relay your change request to the registry within minutes, and they publish your authoritative NS (nameserver) records to their root zone. Most registries update their zones promptly. For example, VeriSign refreshes zones for .com domain names every three minutes. However, not all registries make updates that quickly. Registries often protect their root nameservers from overuse by setting a high TTL of up to 48 hours or more for those NS records. In addition, even though recursive nameservers should not cache the root NS records, some ISPs cache the information anyway, which can result in a longer nameserver propagation time.