On Thu, Dec 27, 2012 at 04:09:41AM +0000, Blake Pfankuch <blake@pfankuch.me> wrote a message of 26 lines which said:
Anyone have insight as to a reason for outage or ETA?
Tested from several places. Works over IPv4, complete failure over IPv6. % check-soa -i walmart.com pdns193.ultradns.biz. 156.154.66.193: OK: 2012122001 (126 ms) 2610:a1:1015::e5: ERROR: Timeout pdns193.ultradns.co.uk. 156.154.69.193: OK: 2012122001 (122 ms) 2610:a1:1017::e5: ERROR: Timeout pdns193.ultradns.com. 156.154.64.193: OK: 2012122001 (137 ms) 2001:502:f3ff::e5: ERROR: Timeout pdns193.ultradns.info. 156.154.68.193: OK: 2012122001 (114 ms) 2610:a1:1016::e5: ERROR: Timeout pdns193.ultradns.net. 156.154.65.193: OK: 2012122001 (140 ms) 2610:a1:1014::e5: ERROR: Timeout pdns193.ultradns.org. 156.154.67.193: OK: 2012122001 (109 ms) 2001:502:4612::e5: ERROR: Timeout tumblr.com is similar. But it has another issues: the two sets of name servers (UltraDNS and Dynect) serve two different zones, with different serial numbers (573 vs. 2012122891).