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Robust domain name resolution

  • US 9,276,902 B2
  • Filed: 02/24/2014
  • Issued: 03/01/2016
  • Est. Priority Date: 04/23/2009
  • Status: Active Grant
First Claim
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1. One or more processor readable storage devices having processor readable code stored thereon, the processor readable code for programming one or more processors to perform a method comprising:

  • storing subscriber information for a first client and a second client, the subscriber information for the first client indicates a preference to receive expired domain name information and the subscriber information for the second client indicates a preference not to receive expired domain name information;

    receiving a request from the first client for domain name information of a first domain name and a request from the second client for domain name information of the first domain name;

    determining that a domain name record for the first domain name is expired and that one or more authoritative nameservers for the first domain name are unavailable;

    transmitting a first response based on the domain name record for the first domain name to the first client in accordance with the subscriber information for the first client; and

    transmitting a second response indicating a failure to obtain domain name information for the first domain name to the second client in accordance with the subscriber information for the second client.

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