go
host81-149-166-37.in-addr.btopenworld.com has one IP number , which also has a corresponding reverse pointer. mail2.easycom.co.uk point to the same IP. in-addr.btopenworld.com is a domain controlled by two nameservers at bt.net. They are on different IP networks. host81-149-166-37.in-addr.btopenworld.com is hosted on a server in United Kingdom.

host81-149-166-37.in-addr.btopenworld.com
a records
 
+ 81.149.166.37 81.128.0.0/11 AS2856 -
+ --- -

in-addr.btopenworld.com
ns-soa records
ns20.bt.net
+ 194.72.6.99 194.72.0.0/14 AS2856 -
+ --- -
+ --- indnss20.bt.net
ns records
ns20.bt.net
+ 194.72.6.99 194.72.0.0/14 AS2856 -
+ --- -
+ --- indnss20.bt.net
ns21.bt.net
+ 217.35.209.187 217.32.0.0/12 AS2856 indnss21.bt.net
+ --- indnss21.bt.net
+ --- -
ip numbers of host
81.149.166.37
ptrs of ip numbers
host81-149-166-37.in-addr.btopenworld.com
ip numbers using ptr to this host
81.149.166.37
hostnames sharing ip with a-records
mail2.easycom.co.uk
domains using this as mailserver under another name
acerdirect.co.uk
acernotebooks.co.uk
aircondirect.co.uk
appliancesdirect.co.uk
buyitdirect.co.uk
debenhamselectricals.com
directtvs.co.uk
easycom.co.uk
easycomputers.co.uk
flattelly.co.uk
ipcctvcameras.co.uk
laptopsdirect.co.uk
laptopsdirect.ie
networkplaces.co.uk
projectorsdirect.co.uk
serversdirect.co.uk
shoptargus.com