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United Kingdom ISP DNS Servers

51 internet service providers listed — 37 with known DNS server addresses. ISP DNS servers are typically private and only work for that ISP's customers.

We list ISP DNS servers from 240 countries, with a total of 4,367 entries. Browse all countries

All Countries Public DNS in United Kingdom Public DNS Servers
Note: ISP DNS servers are not public — they only work for customers of that specific ISP. If you want DNS that works from any connection, use public DNS servers instead.

Major National ISP

8 providers
BT (British Telecommunications)
ASAS2856
Position: Largest ISP in UK (~28% market share)
Coverage: Nationwide
Technology: Fiber (FTTC/FTTP), DSL, via Openreach
DNS Servers:
62.6.40.178
Primary
62.6.40.162
Secondary
194.72.9.38
Additional
194.72.9.34
Additional
194.72.0.98
Additional
194.72.0.114
Additional
Owns Openreach infrastructure
DNS auto-assigned via DHCP
Virgin Media
ASAS5089
Position: Largest cable broadband (~19% market share)
Coverage: Urban areas (major cities and towns)
Technology: Cable (DOCSIS)
DNS Servers:
194.168.4.100
Primary
194.168.8.100
Secondary
194.168.4.123
Business Primary
194.168.8.123
Business Secondary
Owned by Liberty Global
Uses own cable infrastructure (not Openreach)
Up to 1Gbps+
Sky Broadband
Position: Major ISP (~22% market share)
Coverage: Nationwide (uses Openreach)
Technology: Fiber, DSL (via Openreach)
DNS Servers:
90.207.238.97
Primary
90.207.238.99
Secondary
Part of Comcast/Sky Group
TalkTalk
ASAS13285
Position: Major budget ISP (~11% market share)
Coverage: Nationwide (uses Openreach)
Technology: Fiber, DSL (via Openreach)
DNS Servers:
79.79.79.79
Primary
79.79.79.80
Secondary
62.24.134.1
Alternative Primary
62.24.243.2
Alternative Secondary
Known for competitive pricing
Plusnet
ASAS6871
Position: Mid-tier ISP (~5% market share)
Coverage: Nationwide (uses Openreach)
Technology: Fiber, DSL (via Openreach)
DNS Servers:
212.159.13.49
Primary
212.159.13.50
Secondary
212.159.6.9
Alternative Primary
212.159.6.10
Alternative Secondary
213.120.234.37
SafeGuard Primary
213.120.234.38
SafeGuard Secondary
Subsidiary of BT Group
SafeGuard DNS provides content filtering
EE (Everything Everywhere)
Position: Largest mobile network (~7% broadband share)
Coverage: Nationwide mobile, growing fiber
Technology: 4G/5G, Fiber (FTTP)
DNS Servers: Not publicly documented — auto-assigned via DHCP
Owned by BT Group
Uses dynamically assigned DNS
DNS varies by region
Vodafone UK
ASAS5378
Position: Major mobile operator (~4% broadband share)
Coverage: National mobile, expanding fixed broadband
Technology: Mobile, Fiber (via CityFibre)
DNS Servers: Not publicly documented — auto-assigned via DHCP
Merged with Three UK
Fixed broadband via CityFibre partnership
Three (3) UK
Position: Mobile network operator
Coverage: National mobile
Technology: 4G/5G, Fixed Wireless
DNS Servers: Not publicly documented — auto-assigned via DHCP
Part of Vodafone-Three merger
5G home broadband available

Regional & Alternative ISP

7 providers
Zen Internet
ASAS13037
Position: Premium independent ISP
Coverage: Selective nationwide
Technology: Fiber, DSL (Openreach + alternatives)
DNS Servers:
212.23.3.100
Primary
212.23.6.100
Secondary
Award-winning customer service
Hyperoptic
Position: Full-fiber ISP
Coverage: Major cities (London, Manchester, Birmingham, etc.)
Technology: FTTP (own network)
DNS Servers: Not publicly documented — auto-assigned via DHCP
1Gbps+ speeds
Focus on apartment buildings
Community Fibre
Position: Full-fiber ISP
Coverage: London and expanding
Technology: FTTP (own network)
DNS Servers: Not publicly documented — auto-assigned via DHCP
Rapid expansion in London
Social enterprise focus
CityFibre
ASAS8468
Position: Wholesale fiber network
Coverage: 60+ cities across UK
Technology: Wholesale FTTP
DNS Servers: Not publicly documented — auto-assigned via DHCP
Wholesale provider — not direct to consumer
Partners: Vodafone, TalkTalk, Zen
Gigaclear
ASAS56329
Position: Rural full-fiber specialist
Coverage: Rural England
Technology: FTTP (own network)
DNS Servers: Not publicly documented — auto-assigned via DHCP
Focus on rural "not spots"
100% fiber optic network
KCOM (Hull area)
Position: Regional ISP
Coverage: Kingston upon Hull and East Yorkshire
Technology: Fiber, DSL (own infrastructure)
DNS Servers: Not publicly documented — auto-assigned via DHCP
Historic telephony monopoly in Hull
Only ISP outside BT original territory
Andrews & Arnold (AAISP)
Position: Technical/enthusiast ISP
Coverage: Nationwide
Technology: Fiber, DSL (via Openreach)
DNS Servers: Not publicly documented — auto-assigned via DHCP
For power users
No traffic management
IPv6 native

Business ISP

3 providers
BT Business
ASAS2856
Position: Leading business ISP
Coverage: Nationwide
Technology: Fiber, DSL, Leased Lines
DNS Servers: Not publicly documented — auto-assigned via DHCP
Same DNS as BT residential
Dedicated DNS available for enterprise
Virgin Media Business
ASAS5089
Position: Major business cable provider
Coverage: Urban areas
Technology: Cable, Fiber
DNS Servers:
194.168.4.123
Business Primary
194.168.8.123
Business Secondary
Separate from residential DNS
Gamma Telecom
ASAS31655
Position: Wholesale and business provider
Coverage: Nationwide
Technology: Various
DNS Servers: Not publicly documented — auto-assigned via DHCP
Wholesale provider to many resellers

Mobile Network Operator

1 provider
O2 / Virgin Media O2
Position: Major mobile operator
Coverage: National mobile
Technology: Mobile
DNS Servers: Not publicly documented — auto-assigned via DHCP
Joint venture between Virgin Media and Telefónica
Mobile services only

Smaller & Regional ISP

2 providers
Post Office Broadband
Position: Budget ISP
Coverage: Nationwide (uses TalkTalk network)
Technology: DSL, Fiber (via TalkTalk)
DNS Servers: Not publicly documented — auto-assigned via DHCP
Powered by TalkTalk infrastructure
Now Broadband
Position: Budget ISP
Coverage: Nationwide (uses Sky network)
Technology: DSL, Fiber (via Sky)
DNS Servers: Not publicly documented — auto-assigned via DHCP
Owned by Sky
No contract option available

Network Service Provider

9 providers
IONOS SE
AS8560
Technology: Mobile
DNS Servers:
109.228.37.171
ns1.genesis-tech.eu
109.228.38.206
ns1.cmcdowell.co.uk
109.228.38.222
ns1.cl0udhosting.com
109.228.38.85
planningapplications.com
109.228.46.157
ns2.simajinhosting.com
109.228.46.170
ns1.wocki.com
109.228.47.147
mail.adobeconsultant.co.uk
109.228.47.149
server.instantminibushireaberdeen.co.uk
Discovered via network scan
British Telecommunications PLC
AS2856
DNS Servers:
31.121.75.176
ns1.haltonlearning.net
81.133.74.88
ns0.cornerstone.systems
81.150.189.146
ns1.privatedns.uk
81.150.189.147
ns2.privatedns.uk
81.150.32.185
host01.brainwavedesigns.co.uk
84.23.0.82
ns2.biznetservers.com
84.23.8.3
ns1.biznetservers.com
84.23.8.54
ns3.biznetservers.com
Discovered via network scan
Team Blue Carrier Limited
AS29550
Technology: Mobile
DNS Servers:
151.236.32.174
webserver7.snconsultors.com
151.236.33.104
ns1.sheenrose.co.uk
151.236.33.134
webserver5.snconsultors.com
151.236.33.149
ns4.webhostingireland.eu
151.236.33.150
verita.dnsserver.pt
151.236.33.202
ns1.teclan.net
151.236.33.251
bell.ns.rockcdn.com
151.236.33.38
validstay.nodnsinfo.com
Discovered via network scan
M247 Europe SRL
AS9009
Technology: DSL, Mobile
DNS Servers:
146.70.23.203
mail.collins-walker.co.uk
146.70.23.253
mail-sending.simonsnelling.com
86.106.136.11
email.northumberland-caravans.co.uk
86.106.136.12
mail.consideratecounselling.co.uk
86.106.136.7
email.martinsmithletting.co.uk
104.250.186.208
mail.3dgfx.net
135.136.23.2
DNS Server
135.136.23.3
DNS Server
Discovered via network scan
NForce Entertainment B.V.
AS43350
DNS Servers:
217.114.41.10
DNS Server
217.114.41.100
DNS Server
217.114.41.101
DNS Server
217.114.41.102
DNS Server
217.114.41.103
DNS Server
217.114.41.104
DNS Server
217.114.41.105
DNS Server
217.114.41.106
DNS Server
Discovered via network scan
The Constant Company, LLC
AS20473
DNS Servers:
104.238.172.34
ns3.netcalibre.net
104.238.172.47
ns1.xgoth.com
108.61.172.144
ns2.qrm.co.za
108.61.173.235
ns2.blackhost.dk
108.61.175.105
ns2.marne.gr
108.61.221.249
ns4.vaeono.com
136.244.64.200
server.thecodedragons.com
136.244.65.69
ns3.vmh.pw
Discovered via network scan
NTT Global Data Centers EMEA UK Ltd.
AS29017
Technology: DSL
DNS Servers:
83.223.102.117
dispense4me.mtcserver.com
83.223.102.18
deans.mtcserver.com
83.223.102.68
clickconsultvps.mtcserver.com
83.223.105.147
svr01.lumina-innovations.com
83.223.106.144
ns1.ishus.is
83.223.106.145
ns2.ishus.is
83.223.106.17
ns1.bpweb.net
83.223.106.18
ns2.bpweb.net
Discovered via network scan
FREE RANGE CLOUD - Free Range Cloud Hosting Inc.
AS53356
DNS Servers:
82.22.127.0
DNS Server
82.22.127.1
DNS Server
82.22.127.10
DNS Server
82.22.127.100
DNS Server
82.22.127.101
DNS Server
82.22.127.102
DNS Server
82.22.127.103
DNS Server
82.22.127.104
DNS Server
Discovered via network scan
Wildcard UK Limited
AS34119
DNS Servers:
31.22.7.52
web1.trustnetsolutions.ro
185.2.168.10
DNS Server
185.2.168.107
DNS Server
185.2.168.11
DNS Server
185.2.168.117
DNS Server
185.2.168.12
DNS Server
185.2.168.124
DNS Server
185.2.168.125
DNS Server
Discovered via network scan

ISP

11 providers
Treadstone Business Development S.R.L.
AS210878
DNS Servers:
109.207.131.1
DNS Server
109.207.131.10
DNS Server
109.207.131.100
DNS Server
109.207.131.101
DNS Server
109.207.131.102
DNS Server
109.207.131.103
DNS Server
109.207.131.104
DNS Server
109.207.131.105
DNS Server
Discovered via network scan
Cato Networks Ltd
AS13150
DNS Servers:
185.114.123.0
DNS Server
185.114.123.1
DNS Server
185.114.123.10
DNS Server
185.114.123.100
DNS Server
185.114.123.101
DNS Server
185.114.123.102
DNS Server
185.114.123.103
DNS Server
185.114.123.104
DNS Server
Discovered via network scan
Heart Internet limited
AS20738
DNS Servers:
46.32.228.108
ns.brightsilence.com
46.32.228.96
mx1.nsnoc.com
46.32.229.208
vinecreations.co.uk
46.32.231.159
ns2.csweb.co.uk
79.170.40.73
ns0.mainnameserver.com
79.170.43.3
ns2.mainnameserver.com
109.106.185.16
mail.outerzone.co.uk
109.106.185.21
838439.vps-10.com
Discovered via network scan
Enix Ltd
AS52148
Technology: Fiber
DNS Servers:
91.238.160.110
nortonsportscharity.co.uk
91.238.160.124
enixns.com
91.238.160.125
opiscounselling.co.uk
91.238.160.157
enixns.com
91.238.160.171
smithers.enixns.com
91.238.160.172
cp160172.hpdns.net
91.238.160.173
cp160173.hpdns.net
91.238.160.174
cp160174.hpdns.net
Discovered via network scan
Layershift Limited
AS205072
DNS Servers:
109.109.132.201
beige-sunset.man-1.vm.plesk-server.com
45.155.21.10
dns2.vm.plesk-server.com
87.239.20.221
ukresolver3.layershift.com
109.109.128.107
DNS Server
109.109.128.108
DNS Server
109.109.128.110
DNS Server
109.109.128.122
DNS Server
109.109.128.123
DNS Server
Discovered via network scan
Orion Network Limited
AS41564
DNS Servers:
104.160.2.130
DNS Server
104.160.2.131
DNS Server
104.160.2.132
DNS Server
104.160.2.133
DNS Server
104.160.2.134
DNS Server
104.160.2.135
DNS Server
104.160.2.136
DNS Server
104.160.2.137
DNS Server
Discovered via network scan
Team Blue Carrier Limited
AS34282
Technology: Mobile
DNS Servers:
81.19.177.66
ns0.wesh.co.uk
81.19.178.112
rdns1.s22.odibo.net
81.19.188.146
sm01.smartinsights.com
81.19.188.163
ns1.satsumamedia.co.uk
81.19.188.164
ns2.satsumamedia.co.uk
85.92.64.161
ns.uknoc.co.uk
85.92.66.178
hometime.nmsdns.com
85.92.66.218
gonzo.snailsolutions.net
Discovered via network scan
LoadEdge Limited
AS32708
DNS Servers:
103.91.56.144
DNS Server
103.91.57.76
DNS Server
85.92.100.0
85.92.100.0.ptr.rootnetworks.com
85.92.100.1
85.92.100.1.ptr.rootnetworks.com
85.92.100.10
85.92.100.10.ptr.rootnetworks.com
85.92.100.100
DNS Server
85.92.100.101
DNS Server
85.92.100.102
85.92.100.102.ptr.rootnetworks.com
Discovered via network scan
Victor Connect Ltd.
AS200418
DNS Servers:
185.107.228.62
DNS Server
185.107.228.92
DNS Server
185.107.229.1
DNS Server
185.107.229.10
DNS Server
185.107.229.100
DNS Server
185.107.229.101
DNS Server
185.107.229.102
DNS Server
185.107.229.103
DNS Server
Discovered via network scan
Domain names registrar REG.RU, Ltd
AS197695
DNS Servers:
5.63.152.107
DNS Server
5.63.152.109
DNS Server
5.63.152.112
DNS Server
5.63.152.125
DNS Server
5.63.152.126
DNS Server
5.63.152.131
DNS Server
5.63.152.140
DNS Server
5.63.152.143
DNS Server
Discovered via network scan
Google LLC
AS396982
DNS Servers:
34.105.143.205
ns1.vaccoda.com
34.105.217.36
ns1.visualsoft.co.uk
34.142.32.93
ns1.cdmon.net
34.89.90.116
ns3.visualsoft.co.uk
35.189.106.232
ns1.cdmon.net
35.234.151.204
ns2.visualsoft.co.uk
34.105.132.135
135.132.105.34.bc.googleusercontent.com
34.105.132.31
31.132.105.34.bc.googleusercontent.com
Discovered via network scan

Enterprise

2 providers
Amazon.com, Inc.
AS16509
DNS Servers:
18.130.1.134
a.mcadns.org
18.130.128.139
ns0.opentraintimes.net
18.130.175.252
ns1.opentraintimes.net
18.132.28.61
quattropensions.online
18.133.111.141
ns2.nevisinternet.net
18.133.6.219
ns.limedata.com
18.134.171.220
ns1.robertkime.com
18.134.201.60
ns2.dacoda.is
Discovered via network scan
LogicWeb Inc.
AS64286
DNS Servers:
149.57.63.14
ayman.tivornstructix.com
149.57.63.24
waleed.tivornscriptorix.com
149.57.63.3
ahmed.mitoconsria.com
149.57.63.35
dalia.nerionscriptorix.com
149.57.63.7
zayd.tivornsynthora.com
149.57.63.76
solutionslab.bluemediasite.com
149.57.63.10
rami.nerionlogicora.com
149.57.63.100
DNS Server
Discovered via network scan

Content Provider

2 providers
Akamai International B.V.
AS20940
DNS Servers:
104.78.67.13
a104-78-67-13.deploy.static.akamaitechnologies.com
104.78.67.14
a104-78-67-14.deploy.static.akamaitechnologies.com
104.78.67.16
a104-78-67-16.deploy.static.akamaitechnologies.com
104.78.67.17
a104-78-67-17.deploy.static.akamaitechnologies.com
104.78.67.20
a104-78-67-20.deploy.static.akamaitechnologies.com
104.78.67.21
a104-78-67-21.deploy.static.akamaitechnologies.com
104.78.67.27
a104-78-67-27.deploy.static.akamaitechnologies.com
104.78.67.39
a104-78-67-39.deploy.static.akamaitechnologies.com
Discovered via network scan
UK Dedicated Servers Limited
AS42831
Technology: DSL
DNS Servers:
31.132.6.179
ns2.yshan.org
37.9.56.210
ns1.shelliwood.com
37.9.56.211
ns2.shelliwood.com
37.9.61.62
ns2.albatrading.com
37.9.63.184
ns1.ec-payments.net
37.9.63.185
ns2.ec-payments.net
5.101.139.44
ns2.quasarelectronics.co.uk
5.101.140.20
ns4.whytock.net
Discovered via network scan

Internet Service Provider

5 providers
Node4 Limited
AS31727
Technology: DSL, Mobile
DNS Servers:
109.203.100.120
mail.einaosolutions.com
109.203.100.245
server.letresponse.com
109.203.101.109
mailserver.inspiratia.com
109.203.101.61
server.phillipsconsulting.net
109.203.102.71
vm230214.bedotdns.com
109.203.109.27
server.fluvial-innovations.co.uk
109.203.109.61
server.domosconsulting.com
109.203.114.200
server.mjcwebsolutions.co.uk
Discovered via network scan
Sky UK Limited
AS5607
DNS Servers:
151.231.249.142
host14-rangeA-mcdn.cdn.enslo.isp.sky.com
151.231.249.143
host15-rangeA-mcdn.cdn.enslo.isp.sky.com
151.231.249.148
host20-rangeA-mcdn.cdn.enslo.isp.sky.com
151.231.249.150
host22-rangeA-mcdn.cdn.enslo.isp.sky.com
151.231.249.167
host39-rangeA-mcdn.cdn.enslo.isp.sky.com
90.207.238.101
ns0.isp.sky.com
90.207.238.102
ns1.isp.sky.com
90.211.176.1
dvn-enslo-gtm-01np.skydvn.com
Discovered via network scan
Zen Internet Ltd
AS13037
Technology: DSL, Fiber, Mobile
DNS Servers:
146.66.106.164
146-66-106-164.no-dns-yet.in-addr.zen.co.uk
146.66.79.148
146-66-79-148.no-dns-yet.in-addr.zen.co.uk
146.66.81.102
ns1.tlwebservices.co.uk
146.66.81.103
ns2.tlwebservices.co.uk
146.66.81.109
ns3.tlwebservices.co.uk
146.66.95.58
ns0-ng.orpheusnet.co.uk
51.148.113.5
dns0.quad.co.uk
51.148.113.6
dns1.quad.co.uk
Discovered via network scan
Itility Limited
AS5587
DNS Servers:
62.69.71.206
townsontractors.iracknet.com
212.69.220.10
DNS Server
212.69.220.100
DNS Server
212.69.220.101
DNS Server
212.69.220.102
DNS Server
212.69.220.103
DNS Server
212.69.220.104
DNS Server
212.69.220.105
DNS Server
Discovered via network scan
Wavenet Limited
AS5413
Technology: DSL
DNS Servers:
62.232.180.133
ns1.firstoption.com
62.232.234.167
ho-sc-dns-01.hybridoffice.co.uk
62.232.63.35
ns1.insmed.co.uk
62.232.63.5
ns0.insmed.co.uk
62.44.68.196
srvcache2.dns.daisygroup.net
109.170.134.137
109-170-134-137.xdsl.murphx.net
109.170.153.58
109-170-153-58.xdsl.murphx.net
109.170.168.129
DNS Server
Discovered via network scan

Educational/Research

1 provider
Jisc Services Limited
AS786
DNS Servers:
128.16.5.32
ns1.cs.ucl.ac.uk
128.232.0.19
dns0.cl.cam.ac.uk
128.232.24.40
svr-dns-0.cl.cam.ac.uk
128.232.24.41
svr-dns-1.cl.cam.ac.uk
128.240.2.80
dns0.ncl.ac.uk
128.240.229.18
dns1.ncl.ac.uk
128.240.229.34
dns2.ncl.ac.uk
128.40.38.4
dns0.ee.ucl.ac.uk
Discovered via network scan

Should I use my ISP's DNS in United Kingdom?

For most users in United Kingdom, the answer is no. ISP DNS servers are convenient because they work automatically, but they come with significant drawbacks. Many ISPs log every domain you visit, some sell aggregated browsing data to advertisers, and others practice NXDOMAIN hijacking — redirecting failed lookups to search pages filled with ads. ISP DNS servers also tend to be slower than dedicated public resolvers like Cloudflare or Google, especially during peak hours when they are overloaded with traffic from millions of customers.

Switching to a public DNS provider gives you better speed, stronger privacy, DNSSEC validation to prevent spoofing attacks, and the option for encrypted DNS via DoH or DoT. The change takes less than two minutes on any device.

Recommended alternatives for United Kingdom users

Frequently Asked Questions

What DNS does BT (British Telecommunications) use?

BT (British Telecommunications) operates its own DNS resolvers for customers. The specific IP addresses are listed above. These servers only work on BT (British Telecommunications)'s network and may change without notice. For a reliable alternative, consider public DNS providers like Cloudflare (1.1.1.1) or Google (8.8.8.8).

Does my United Kingdom ISP intercept DNS queries?

Some ISPs in United Kingdom practice NXDOMAIN hijacking, redirecting failed DNS lookups to their own search or advertising pages instead of returning a proper error. You can test this using our DNS Privacy Check tool. If your ISP hijacks DNS, switching to a public resolver eliminates this.

How do I change my DNS from my ISP's default?

On Windows: Settings > Network > your adapter > DNS > set to Manual and enter 1.1.1.1 and 1.0.0.1. On Mac: System Settings > Network > DNS. On your router: access the admin panel (usually 192.168.1.1) and change DNS in WAN/Internet settings. This overrides your ISP's DNS for all devices.

Is my ISP's DNS slower than Google or Cloudflare?

Often yes. ISP DNS servers can be overloaded during peak hours, while public DNS providers like Cloudflare and Google operate massive anycast networks optimised for speed. Use our DNS Gaming Benchmark to test latency from your actual location and see which is fastest for you.

What is NXDOMAIN hijacking and does my ISP do it?

NXDOMAIN hijacking occurs when your ISP redirects non-existent domain lookups to their own servers instead of returning the standard NXDOMAIN error. This can break applications, interfere with email validation, and expose your browsing to tracking. Run our DNS Privacy Check to detect if your ISP does this.

Last updated: . Data sourced from network scans and public records — ISPs may change DNS servers without notice.