IP range details

81.128.0.0/12

AS2856  ·  British Telecommunications PLC

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Summary

Country United Kingdom
Domain bt.com
ASN AS2856
Registry ripe
Hosted IPs 1,048,576
ID BT-INFRA

WHOIS Details

inetnum:        81.128.0.0 - 81.143.255.255
netname:        BT-INFRA
descr:          BT Infrastructure Layer
country:        GB
admin-c:        BS1474-RIPE
tech-c:         BS1474-RIPE
status:         LIR-PARTITIONED PA
mnt-by:         BTNET-INFRA-MNT
mnt-lower:      BTNET-MNT
mnt-routes:     BTNET-MNT
created:        2014-08-01T07:43:40Z
last-modified:  2014-08-01T07:43:40Z
source:         RIPE
abuse-email:    abuse@bt.com
abuse-c:        AR13878-RIPE
abuse-org:      ORG-BPIS1-RIPE

role:           BTnet Support
address:        Adhara
address:        Adastral Park
address:        Martlesham Heath
address:        Ipswich
address:        SUFFLK IP5 3RE
address:        GB
phone:          +44 800 0858963 5
phone:          +44 1473 336231
e-mail:         as2856peering@bt.com
e-mail:         btnetdns@bt.net
admin-c:        FLS15-RIPE
tech-c:         BS1474-RIPE
nic-hdl:        BS1474-RIPE
remarks:        For all queries contact as2856peering@bt.com
remarks:        Please send delisting issues to btnetdns@bt.net
mnt-by:         BTNET-MNT
created:        2002-04-30T07:54:10Z
last-modified:  2009-11-19T15:52:52Z
source:         RIPE

route:          81.128.0.0/12
descr:          BT Public Internet Service
origin:         AS2856
mnt-by:         BTNET-INFRA-MNT
notify:         ip.address.admin@bt.com
created:        2005-06-16T14:11:53Z
last-modified:  2014-07-31T07:47:16Z
source:         RIPE

Hosted domains

There are 3,843 domain names hosted across 1,722 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
81.128.239.117 americanwhiskiesawards.com 61
81.128.180.98 clocktower.co.uk 42
81.133.56.18 thecartuner.co.uk 33
81.128.140.142 depannagehpfrance.fr 32
81.133.252.110 anythingairhandling.com 25
81.143.128.210 csluk.net 22
81.128.140.135 applerepair.co.uk 22
81.133.228.187 princeopoly.com 21
81.128.173.172 prestigefireandsecurity.co.uk 20
81.143.221.131 kemr.co.uk 17
81.128.195.220 onebusinessinsurance.co.uk 16
81.128.245.172 renrutconsultancy.co.uk 16
81.134.37.149 derbycomms.net 15
81.128.180.82 lintonhousecoffee.co.uk 15
81.133.84.177 annahancock.co.uk 15
81.128.245.171 turnerlittle.uk 14
81.142.90.106 ezcomputingltd.co.uk 14
81.143.60.249 oliverjackmotorsport.co.uk 13
81.130.144.232 thepropertymarketonline.com 13
81.128.155.74 apsleyfarmsmulch.com 12

Hosted domains API

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IP address subranges within this IP range

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What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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