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We have applied this method to find latitude and longitude of PingER nodes. We used manual method to find coordinates of 14 PingER nodes successfully. e.g. dnsstat.polyn.kiae.su, this node is in Russia. This is was because we could not find any contact person in our database for these nodes. Similarly we have had sent the mails to the contact persons of other PingER nodes and we have got 60% response (24 Nodes) with server coordinates. This is the most accurate way to find geographical coordinates.