You nameservers will be included within your welcome email titled "New Account Information"

For quick reference you may use the following nameservers:

CA-Bravo:
b1.core-dns.net
b2.core-dns.net

CA-Foxtrot:
f1.core-dns.net
f2.core-dns.net

CA-Pacific:
d1.core-dns.net
d2.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-Echo:
echo1.core-dns.net
echo2.core-dns.net

IA-Hotel:
h1.core-dns.net
h2.core-dns.net

IA-SRV6:
c1.core-dns.net
c2.core-dns.net

NC-Gemini
g1.core-dns.net
g2.core-dns.net

NC-Juliet:
j1.core-dns.net
j2.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