Code:
# nslookup -qt=MX -d2 smithssc.com
traceroute mail.so.centurytel.net;; res_nmkquery(QUERY, 250.182.142.209.in-addr.arpa, IN, PTR)
------------
SendRequest(), len 46
HEADER:
opcode = QUERY, id = 1373, rcode = NOERROR
header flags: query, want recursion
questions = 1, answers = 0, authority records = 0, additional = 0
QUESTIONS:
250.182.142.209.in-addr.arpa, type = PTR, class = IN
------------
------------
Got answer (166 bytes):
HEADER:
opcode = QUERY, id = 1373, rcode = NOERROR
header flags: response, want recursion, recursion avail.
questions = 1, answers = 1, authority records = 2, additional = 2
QUESTIONS:
250.182.142.209.in-addr.arpa, type = PTR, class = IN
ANSWERS:
-> 250.182.142.209.in-addr.arpa
type = PTR, class = IN, dlen = 29
name = dnsc1-vp.la.centurylink.net
ttl = 454298 (5d6h11m38s)
AUTHORITY RECORDS:
-> 182.142.209.in-addr.arpa
type = NS, class = IN, dlen = 17
nameserver = ns2.centurytel.net
ttl = 547097 (6d7h58m17s)
-> 182.142.209.in-addr.arpa
type = NS, class = IN, dlen = 6
nameserver = ns1.centurytel.net
ttl = 547097 (6d7h58m17s)
ADDITIONAL RECORDS:
-> ns1.centurytel.net
type = A, class = IN, dlen = 4
internet address = 209.142.136.142
ttl = 72800 (20h13m20s)
-> ns2.centurytel.net
type = A, class = IN, dlen = 4
internet address = 207.230.192.252
ttl = 69560 (19h19m20s)
------------
Server: dnsc1-vp.la.centurylink.net
Address: 209.142.182.250
;; res_nmkquery(QUERY, smithssc.com, IN, MX)
------------
SendRequest(), len 30
HEADER:
opcode = QUERY, id = 1374, rcode = NOERROR
header flags: query, want recursion
questions = 1, answers = 0, authority records = 0, additional = 0
QUESTIONS:
smithssc.com, type = MX, class = IN
------------
------------
Got answer (159 bytes):
HEADER:
opcode = QUERY, id = 1374, rcode = NOERROR
header flags: response, want recursion, recursion avail.
questions = 1, answers = 2, authority records = 2, additional = 2
QUESTIONS:
smithssc.com, type = MX, class = IN
ANSWERS:
-> smithssc.com
type = MX, class = IN, dlen = 23
preference = 10, mail exchanger = mail.centurytel.net
ttl = 86400 (1D)
-> smithssc.com
type = MX, class = IN, dlen = 14
preference = 20, mail exchanger = fallback2.centurytel.net
ttl = 86400 (1D)
AUTHORITY RECORDS:
-> smithssc.com
type = NS, class = IN, dlen = 6
nameserver = ns1.centurytel.net
ttl = 86400 (1D)
-> smithssc.com
type = NS, class = IN, dlen = 6
nameserver = ns2.centurytel.net
ttl = 86400 (1D)
ADDITIONAL RECORDS:
-> ns1.centurytel.net
type = A, class = IN, dlen = 4
internet address = 209.142.136.142
ttl = 72800 (20h13m20s)
-> ns2.centurytel.net
type = A, class = IN, dlen = 4
internet address = 207.230.192.252
ttl = 69560 (19h19m20s)
------------
Non-authoritative answer:
smithssc.com
type = MX, class = IN, dlen = 23
preference = 10, mail exchanger = mail.centurytel.net
ttl = 86400 (1D)
smithssc.com
type = MX, class = IN, dlen = 14
preference = 20, mail exchanger = fallback2.centurytel.net
ttl = 86400 (1D)
Authoritative answers can be found from:
smithssc.com
type = NS, class = IN, dlen = 6
nameserver = ns1.centurytel.net
ttl = 86400 (1D)
smithssc.com
type = NS, class = IN, dlen = 6
nameserver = ns2.centurytel.net
ttl = 86400 (1D)
ns1.centurytel.net
type = A, class = IN, dlen = 4
internet address = 209.142.136.142
ttl = 72800 (20h13m20s)
ns2.centurytel.net
type = A, class = IN, dlen = 4
internet address = 207.230.192.252
ttl = 69560 (19h19m20s)