You nameservers will be included within your welcome email titled "New Account Information" -- if you have not recieved this email please see the following KB article: http://my.iwfhosting.net/knowledgebase.php?action=displayarticle&id=25
For quick reference you may use the following nameservers:
CA-Foxtrot:
f1.core-dns.net
f2.core-dns.net
CA-Papa
p1.core-dns.net
p2.core-dns.net
CA-Romeo
r1.core-dns.net
r2.core-dns.net
CA2-Apollo
a1.core-dns.net
a2.core-dns.net
IA-Hotel:
h1.core-dns.net
h2.core-dns.net
NC-Gemini
g1.core-dns.net
g2.core-dns.net
NC-Uniform
u1.core-dns.net
u2.core-dns.net
OR-Atlantis:
atlantis1.core-dns.net
atlantis2.core-dns.net
OR-India:
india1.core-dns.net
india2.core-dns.net
OR-Mercury
m1.core-dns.net
m2.core-dns.net
OR-Galileo
galileo1.core-dns.net
galileo2.core-dns.net
