The awards have 14 categories, including the Best Music Site and the Best Charity Site, and will be judged by a panel led by Capital FM DJ Neil Fox.
The judges will draw up a shortlist of six websites for each category and the winners will be announced in October.
Bill Goodland, the director of internet at NTL, said: "We hope everyone will use this opportunity to reward those unsung internet heroes in our communities who help others without personal reward."
NTL has created a to enable the public to vote for their favourite sites.
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