Internet Protocol version 6 (IPv6) – a replacement to the existing IPv4 system – launched at 00:01 GMT on Wednesday.
Spot the difference
• The old IPv4 system uses 32-bit addresses like this: 220.127.116.11
• While an IP address under the new system will look more like this: 3ffe:1900:4545:3:200:f8ff:fe21:67cf
Know more – http://www.google.com/intl/en/ipv6/