Best Practice 3: Place nameservers close to users
The latency of DNS lookups is important for your website. Long latency can translate into lost customers and revenue. Your authoritative nameservers answer queries from other nameservers on the Internet. To ensure a good user experience and fast access to your website, place your nameservers close to, or quickly accessible from the nameservers querying them. Optimally, this would involve placing nameservers in locations with good access to the Internet such as Internet Exchange Points (IXPs).
The highly recommended solution is an outsourced secondary anycast DNS service. With anycast, multiple geographically distributed nameservers share a single IP address and queries are routed to the closestnameserver. When selecting an anycast DNS secondary service, make sure the nameservers are located in IXPs that map geographically to your customers.