SubnetOnline.com - Online NSLookup

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07-2008 - New IPv6 Subnet Calculator...
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06-2008 - Mobile version of network tools in beta...
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06-2008 - First set of IPv6 network tools introduced...
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06-2008 - Port Scanner tool to check port status...
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04-2008 - PING tool update with optional TTL value...
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Online NSLookup

The nslookup command can be used in Windows and Unix to find the IP addresses of a particular computer, using DNS lookup. The name means "name server lookup". The most common version of the program is included as part of the BIND package. A more modern alternative to nslookup is the dig program, also shipping with BIND.
Source: WikiPedia