BELL Canada a consumer ISPs have started the practice of DNS hijacking on non-existent domain names, for the purpose of making money by displaying advertisements. This practice violates the RFC standard for DNS (NXDOMAIN) responses, and can potentially open users to cross-site scripting attacks. This is confirmed by several members of broadband web forum.
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Comcast is the largest home Internet service provider in the United States, providing cable television, broadband Internet, and telephone service to both residential and commercial customers. Comcast cable internet dns servers are as follows:
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The Bharti Airtel is the largest cellular service provider; which also provides telephone services and broadband Internet access (DSL and FTTH/fiber) in top 95 cities in India.
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