go
mx3.level3.com has one IP number , which also has a corresponding reverse pointer. eu.level3.com, ebs.bbnplanet.com, genuityestate.net, mail.bbnplanet.com, salt.bbnplanet.com and at least 35 other hosts use this as a mailserver. level3.com is delegated to two nameservers, however both delegated nameservers are missing in the zone and two other nameservers are listed instead. There are two duplicated IP numbers. Some of them are on the same IP network. Incoming mail for level3.com is handled by two mailservers having a total of eight IP numbers. There are six duplicated IP numbers. Some of them are on the same IP network. level3.com has one IP number. mx3.level3.com is hosted on a server in United States.

mx3.level3.com
a records
 
+ 209.245.18.135 209.244.0.0/14 AS3356 -
+ --- -

level3.com
a records
 
+ 4.68.95.11 4.0.0.0/9 AS3356  
+ ---  
ns-soa records
ns2.level3.net
+ 209.244.0.2 209.244.0.0/14 AS3356 -
+ --- -
ns records
ns1.l3.net
+ 209.244.0.1 209.244.0.0/14 AS3356 ns1.level3.net
+ --- ns1.level3.net
ns2.l3.net
+ 209.244.0.2 209.244.0.0/14 AS3356 ns2.level3.net
+ --- ns2.level3.net
ns1.level3.net
+ 209.244.0.1 209.244.0.0/14 AS3356 -
+ --- -
ns2.level3.net
+ 209.244.0.2 209.244.0.0/14 AS3356 -
mx records
cluster8.us.messagelabs.com
+ 216.82.241.83 216.82.240.0/22 AS26282 mail37.messagelabs.com
+ --- mail37.messagelabs.com
+ 216.82.241.99 216.82.240.0/22 AS26282 mail51.messagelabs.com
+ --- mail51.messagelabs.com
+ 216.82.249.131 216.82.248.0/22 AS26282 mail28.messagelabs.com
+ --- mail28.messagelabs.com
+ 216.82.249.147 216.82.248.0/22 AS26282 mail29.messagelabs.com
+ --- mail29.messagelabs.com
+ 216.82.254.195 216.82.252.0/22 AS26282 mail200.messagelabs.com
+ --- mail200.messagelabs.com
+ 216.82.254.211 216.82.252.0/22 AS26282 mail201.messagelabs.com
+ --- mail201.messagelabs.com
cluster8a.us.messagelabs.com
+ 216.82.241.83 216.82.240.0/22 AS26282 mail37.messagelabs.com
+ --- mail37.messagelabs.com
+ 216.82.241.99 216.82.240.0/22 AS26282 mail51.messagelabs.com
+ --- mail51.messagelabs.com
+ 216.82.248.44 216.82.248.0/22 AS26282 mail554.messagelabs.com
+ --- mail554.messagelabs.com
+ 216.82.248.45 216.82.248.0/22 AS26282 mail555.messagelabs.com
+ --- mail555.messagelabs.com
+ 216.82.249.131 216.82.248.0/22 AS26282 mail28.messagelabs.com
+ --- mail28.messagelabs.com
+ 216.82.249.147 216.82.248.0/22 AS26282 mail29.messagelabs.com
+ --- mail29.messagelabs.com
+ 216.82.254.195 216.82.252.0/22 AS26282 mail200.messagelabs.com
+ --- mail200.messagelabs.com
+ 216.82.254.211 216.82.252.0/22 AS26282 mail201.messagelabs.com
+ --- mail201.messagelabs.com
ip numbers of host
209.245.18.135
ptrs of ip numbers
mx3.level3.com
ip numbers using ptr to this host
209.245.18.135
domains using this as mailserver
adsl-web.sys.gtei.net
amsterdam1-snf1.gtei.net
ancho.bbnplanet.com
chcgil2-snf1.gtei.net
chcgil2-snta1.gtei.net
columbia1-sbast1.gtei.net
columbia1-snlog1.gtei.net
columbia1-snlog2.gtei.net
columbia1-snlog3.gtei.net
columbia1-snlog4-1.gtei.net
columbia1-sseti1.gtei.net
columbia1-sweb1.gtei.net
columbia1-sweb2.gtei.net
columbia1-swebca1.gtei.net
crtntx1-sbast1.gtei.net
crtntx1-snf1.gtei.net
crtntx1-snh1.gtei.net
crtntx1-snsc1.gtei.net
dnsxfr.sys.gtei.net
ebs.bbnplanet.com
english.bbnplanet.com
eu.level3.com
fms-ext.bbnplanet.com
fresno.bbnplanet.com
frnkge1-snf1.gtei.net
genuityestate.net
mail.bbnplanet.com
nsc3.chcgil2.genuity.net
nycmny1-sbast1.gtei.net
nycmny1-snf1.gtei.net
nycmny1-snh1.gtei.net
nycmny1-snms1.gtei.net
nycmny1-snsc1.gtei.net
nycmny1-sping1.gtei.net
paloalto-sace2.gtei.net
parsfr2-snta1.gtei.net
pasilla.bbnplanet.com
poblano.bbnplanet.com
salt.bbnplanet.com
tamqfl1-enms1.gtei.net
nameservers missing in parent delegation
ns1.level3.net
ns2.level3.net
nameservers missing in zone
ns1.l3.net
ns2.l3.net