PublicDNS.info

United Kingdom ISP DNS Servers

21 internet service providers listed — 7 with known DNS server addresses. ISP DNS servers are typically private and only work for that ISP's customers.

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)
AS2856
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
AS5089
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
AS13285
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
AS6871
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
AS5378
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
AS13037
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
AS8468
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
AS56329
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
AS2856
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
AS5089
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
AS31655
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

Why change from ISP DNS?

  • Speed: ISP DNS can be slow or overloaded — public DNS is often faster.
  • Privacy: Some ISPs log or sell DNS query data.
  • Security: Services like Quad9 (9.9.9.9) block malicious domains.
  • Reliability: Public DNS providers offer 99.99%+ uptime.
  • Features: Ad-blocking (AdGuard), family filters (OpenDNS), DNSSEC validation.

Browse public DNS servers · Browse all countries

Last updated: January 2026. Data may be incomplete or outdated — ISPs change DNS servers without notice.