Greetings, It seems AT&T Mobility is blocking EDNS1 queries such as the following on their mobile network, as seen in the details below. Does anyone have a colleague there that would be willing to investigate? - jared EDNS1 OPT RR ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15902 ;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 ;; ., type = SOA, class = IN ; EDNS: version: 1, udp=4096, flags=0000 Sending: 000000 3e 1e 01 00 00 01 00 00 00 00 00 01 00 00 06 00 >............... 000010 01 00 00 29 10 00 00 01 00 00 00 00 ...)........