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If you just changed the record now, DNS resolvers all over the world who don't have the old data cached would instantly see the new IP address (220.127.116.11).
Now you can change your NS records so that they point to the new nameserver(s).
But pay attention to the fact, that the NS records of your parent DNS servers are usually cached for 48 hours.
a resolver who already queried your nameserver 8 minutes ago) would still see the old IP address (18.104.22.168).
So if a resolver queried your nameserver 8 minutes ago, it would see the old data for the next 52 minutes because the "Time To Live" value's set to 1 hour meaning that the record may be cached for 1 hour.
Ace Fekay, MCT, MVP, MCITP EA, Exchange 2010 Enterprise Administrator, MCTS Windows 2008, Exchange 2010 & Exchange 2007, MCSE 2003/2000, MCSA Messaging 2003 Microsoft Certified Trainer Microsoft MVP: Directory Services Active Directory, Exchange and Windows Infrastructure Engineer Compiled 4/2006, recompiled 7/2009, & 1/4/201011/30/2011 – added DHCP credentials and DHCP/DNS tab properties screenshots.3/10/2012 – Added enabling DNS scavenging screenshots.8/22/2012 – Verified with a Microsoft enginner, we need to use the Dns Update Proxy group and configure credentials to work, not one or the other. Also fixed missing screenshots8/3/2012 – Additional info about DHCP Name Protection and that it requires Credentials, Dns Update Proxy, but more so to secure the Dns Update Proxy group .