```
% check-soa -i twitter.com
ns1.p34.dynect.net.
	208.78.70.34: OK: 2007130853 (22 ms)
	2001:500:90:1::34: ERROR: read udp [2001:500:90:1::34]:53: i/o timeout
ns2.p34.dynect.net.
	204.13.250.34: ERROR: read udp 204.13.250.34:53: i/o timeout
ns3.p34.dynect.net.
	208.78.71.34: OK: 2007130853 (28 ms)
	2001:500:94:1::34: ERROR: read udp [2001:500:94:1::34]:53: i/o timeout
ns4.p34.dynect.net.
	204.13.251.34: ERROR: read udp 204.13.251.34:53: i/o timeout

% date -u
Fri Oct 21 17:36:21 UTC 2016

% check-soa -i github.com 
ns1.p16.dynect.net.
	208.78.70.16: OK: 1474079943 (22 ms)
	2001:500:90:1::16: ERROR: read udp [2001:500:90:1::16]:53: i/o timeout
ns2.p16.dynect.net.
	204.13.250.16: ERROR: read udp 204.13.250.16:53: i/o timeout
ns3.p16.dynect.net.
	208.78.71.16: OK: 1474079943 (22 ms)
	2001:500:94:1::16: ERROR: read udp [2001:500:94:1::16]:53: i/o timeout
ns4.p16.dynect.net.
	204.13.251.16: ERROR: read udp 204.13.251.16:53: i/o timeout