shell:$ nslookup -timeout=2 -retry=1 'mts.us'
Server: 75.98.161.224
Address: 75.98.161.224#53
Non-authoritative answer:
Name: mts.us
Address: 209.17.116.163
;; Got SERVFAIL reply from 75.98.161.224, trying next server
;; Got SERVFAIL reply from 69.39.86.5
** server can't find mts.us: SERVFAIL
| 