On 4 June 2013, at 22:19, Enno Davids <enno at metva.com> wrote: > See if whois can tell you who owns the block the IP is in. That may give > you some insight into what is asking for the reverse. Its AT&T. Its probably at least a state's worth of DSL addresses. I am physically at one of them for a couple more days. After that I have no way to test this.