b1.psmtp.com

Delegation
Authoritative answer
Related hostnames

DNS delegation of b1.psmtp.com updated: May 25, 2013 10:03:54 AM

Delegation

step	query	auth	servers
1	b1.psmtp.com.	.	(f,e,a,l,m,j,d,h,c,k,i,g,b).root-servers.net.
2	b1.psmtp.com.	com.	(a,b,e,m,h,k,d,j,f,g,l,c,i).gtld-servers.net.
3	b1.psmtp.com.	psmtp.com.	(ns4,ns1,ns3,ns2).google.com.

We pick f.root-servers.net, one of the 13 root servers (1), and ask it about b1.psmtp.com and learn that com is delegated to 13 name servers (2), so we ask a.gtld-servers.net where we learn that psmtp.com is delegated to four name servers, including ns4.google.com (3), so we ask that one and get the following answer:

Authoritative answer

AUTHORITATIVE for b1.psmtp.com.
psmtp.com.	60	SOA	ns1.google.com. postini-hostmaster.google.com. ( 1521640 7200 3600 3600000 600 )

net. com. psmtp.com. google.com. b1.psmtp.com. ns3.google.com. ns4.google.com. ns1.google.com. ns2.google.com. root-servers.net. gtld-servers.net. m.root-servers.net. a.root-servers.net. g.gtld-servers.net. e.gtld-servers.net. j.root-servers.net. i.gtld-servers.net. f.gtld-servers.net. m.gtld-servers.net. k.gtld-servers.net. h.root-servers.net. d.root-servers.net. d.gtld-servers.net. i.root-servers.net. h.gtld-servers.net. l.root-servers.net. k.root-servers.net. g.root-servers.net. b.gtld-servers.net. f.root-servers.net. c.gtld-servers.net. c.root-servers.net. a.gtld-servers.net. b.root-servers.net. l.gtld-servers.net. j.gtld-servers.net. e.root-servers.net.
whois net
whois com
whois psmtp.com
whois google.com
whois root-servers.net
whois gtld-servers.net

whois psmtp.com, psmtp.com
domain info api psmtp.com

S7.b1.psmtp.com, com.b1.psmtp.com and s20.b1.psmtp.com are hosts under this domain.

Also check www.psmtp.com and psmtp.com.

robtex on b1.psmtp.com
RBL listing of b1.psmtp.com
mnw

Alexa

AVG

mnw

b1.psmtp.com

Delegation

Authoritative answer

Related hostnames