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United States ISP DNS Servers

46 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 States 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

7 providers
Comcast Xfinity
ASAS7922
Position: Largest ISP in USA (~30% market share)
Coverage: 40 states
Technology: Cable (DOCSIS 3.1), Fiber
DNS Servers:
75.75.75.75
IPv4 Primary (Anycast)
75.75.76.76
IPv4 Secondary (Anycast)
2001:558:feed::1
IPv6 Primary
2001:558:feed::2
IPv6 Secondary
Uses DNS Anycast — same IP routes to nearest server
Xfinity gateways may intercept DNS queries
Charter Communications (Spectrum)
ASAS20115
Position: 2nd largest ISP (~28% market share)
Coverage: 41 states
Technology: Cable (DOCSIS 3.1)
DNS Servers:
209.18.47.61
Primary
209.18.47.62
Secondary
71.10.216.1
Regional
71.10.216.2
Regional
Formerly Time Warner Cable and Bright House Networks
DNS varies by legacy network/region
AT&T Internet
ASAS7018
Position: 3rd largest ISP (~14% market share)
Coverage: 21 states
Technology: Fiber (FTTH), DSL, Fixed Wireless
DNS Servers:
68.94.156.1
Primary
68.94.157.1
Secondary
68.94.156.9
Alternative Primary
68.94.157.9
Alternative Secondary
Formerly AT&T U-verse, SBC
Coverage based on former Bell System territories
Verizon (Fios)
ASAS701
Position: Major fiber ISP (~7% market share)
Coverage: 9 states (Northeast corridor)
Technology: Fiber (FTTH), Legacy DSL
DNS Servers:
1.243.0.14
Set 1 Primary
1.243.0.12
Set 1 Secondary
8.237.161.14
Set 2 Primary
8.237.161.12
Set 2 Secondary
68.238.96.14
Set 3 Primary
68.238.96.12
Set 3 Secondary
DNS varies significantly by region
Sold wireline in CA, TX, FL to Frontier
Cox Communications
ASAS22773
Position: Major regional cable ISP (~5% market share)
Coverage: 19 states
Technology: Cable (DOCSIS 3.1)
DNS Servers:
68.1.16.107
Primary
68.1.16.108
Secondary
Largest privately held cable company
DNS varies by regional market
CenturyLink (Lumen Technologies)
ASAS209
Position: Major telephone/DSL provider (~3% market share)
Coverage: 37 states
Technology: DSL, Fiber (limited)
DNS Servers:
205.171.3.66
Primary
205.171.202.166
Secondary
205.171.3.65
Alternative
205.171.2.25
Alternative
Formerly Qwest, Embarq
Known for NXDOMAIN hijacking
Altice USA (Optimum / Suddenlink)
ASAS6128
Position: 4th largest cable operator
Coverage: Northeast (Optimum), scattered (Suddenlink)
Technology: Cable, Fiber
DNS Servers: Not publicly documented — auto-assigned via DHCP
Optimum serves NY, NJ, CT, PA
Suddenlink serves smaller markets
DNS auto-assigned via DHCP

Fiber ISP

2 providers
Google Fiber
ASAS16591
Position: Fiber ISP (limited markets)
Coverage: 20+ cities across 10 states
Technology: FTTH (up to 8 Gbps)
DNS Servers:
8.8.8.8
Uses Google DNS by default
8.8.4.4
Uses Google DNS by default
Very limited availability
Custom DNS can be configured
Ziply Fiber
ASAS20055
Position: Regional fiber provider (Pacific Northwest)
Coverage: WA, OR, ID, MT
Technology: FTTH
DNS Servers: Not publicly documented — auto-assigned via DHCP
Acquired from Frontier (2020)
Expanding fiber aggressively

Fixed Wireless ISP

1 provider
T-Mobile Home Internet
ASAS21928
Position: 5G/4G fixed wireless
Coverage: Nationwide (where T-Mobile coverage available)
Technology: 5G, 4G LTE Fixed Wireless
DNS Servers: Not publicly documented — auto-assigned via DHCP
No data caps
Speeds vary by location and tower congestion

Satellite ISP

3 providers
Starlink (SpaceX)
ASAS14593
Position: Low Earth Orbit satellite ISP
Coverage: Continental US, Alaska, Hawaii, Puerto Rico
Technology: LEO Satellite
DNS Servers: Not publicly documented — auto-assigned via DHCP
Low latency (~30ms) compared to traditional satellite
No data caps
Mobile and Maritime service available
Viasat
Position: Geostationary satellite ISP
Coverage: Continental US
Technology: Geostationary Satellite
DNS Servers: Not publicly documented — auto-assigned via DHCP
Higher latency (~600ms)
Data caps on most plans
HughesNet
Position: Geostationary satellite ISP
Coverage: Continental US
Technology: Geostationary Satellite
DNS Servers: Not publicly documented — auto-assigned via DHCP
High latency
Data caps

Regional Cable ISP

1 provider
Mediacom
ASAS30036
Position: 5th largest cable operator
Coverage: 22 states (smaller markets, Midwest focused)
Technology: Cable (DOCSIS 3.1)
DNS Servers: Not publicly documented — auto-assigned via DHCP
Serves smaller cities and towns

Regional ISP

2 providers
Frontier Communications
ASAS5650
Position: Regional telephone/fiber provider
Coverage: 25 states
Technology: Fiber (FTTH), DSL
DNS Servers: Not publicly documented — auto-assigned via DHCP
Acquired Verizon wireline assets in CA, TX, FL
Significant fiber build-out underway
Windstream (Kinetic)
ASAS7029
Position: Regional telephone/DSL provider
Coverage: 18 states
Technology: DSL, Limited Fiber
DNS Servers: Not publicly documented — auto-assigned via DHCP
Primarily rural and small-town markets

ISP

14 providers
Network Solutions, LLC
AS19871
Technology: Cable, DSL, Mobile
DNS Servers:
108.167.132.122
ns241.prodns.com.br
108.167.132.139
srv244.prodns.com.br
108.167.132.173
ns245.prodns.com.br
108.167.132.186
ns864.hostgator.com.br
108.167.132.187
ns865.hostgator.com.br
108.167.132.191
ns866.hostgator.com.br
108.167.132.192
ns867.hostgator.com.br
108.167.132.196
ns868.hostgator.com.br
Discovered via network scan
HostPapa
AS36352
Technology: Cable, Mobile
DNS Servers:
104.168.123.230
s2.drnsmail.net
104.168.19.72
ns2.cinodras.net
104.168.77.141
srv1.triatlonstore.com
104.168.77.146
cleanservice2008.net
104.168.77.147
mta1.cleanservice2008.net
104.168.77.155
mta2.ccleanservice2008.net
104.168.77.250
teensoupchildcare.com
104.168.84.66
ns4.baby-dragons.com
Discovered via network scan
PrivateSystems Networks
AS63410
Technology: Mobile
DNS Servers:
104.193.108.4
hosting.licensekeymanager.com
104.193.109.127
cellulose.generalinsulation.com
104.193.109.134
host.ens2svr.net
104.193.110.197
swan02.dptechsolutions.com
104.193.110.247
ns1.nrtp.in
104.193.110.63
ns4.surfduck.com
104.193.110.80
host.mtense.com
104.193.111.164
falcon.whethamsolutions.net
Discovered via network scan
Cato Networks Ltd
AS13150
DNS Servers:
149.20.194.160
fortissolutionsgroup.com
149.20.194.28
wilmingtonsmtp.trapac.com
149.20.196.134
fortissolutionsgroup.com
149.20.203.25
mail.oltmans.com
149.20.203.76
wilmingtonsmtp.trapac.com
149.20.205.171
etc-clt.eagletransportcorp.com
149.20.205.78
fortissolutionsgroup.com
45.62.176.224
etc-ash.eagletransportcorp.com
Discovered via network scan
NewtekOne, Inc.
AS14992
Technology: Mobile
DNS Servers:
63.134.201.79
baabaabeans.com
65.110.66.61
jarmstrongconstruction.com
65.110.66.7
www.mountainsofstone.com
75.103.67.5
cloudplesk3-ns1.newtekdns.com
208.106.131.133
DNS Server
208.106.131.134
DNS Server
208.106.131.135
DNS Server
208.106.146.10
DNS Server
Discovered via network scan
Identity Digital Limited
AS207266
Technology: Mobile
DNS Servers:
161.232.11.58
v2n1.nic.vacations
161.232.13.53
v2n1.nic.insure
161.232.13.65
v2n1.nic.consulting
161.232.17.13
v2n1.nic.institute
161.232.17.2
v2n1.nic.solutions
161.232.17.51
v2n1.nic.domains
65.22.103.29
b2.nic.monster
65.22.23.50
v2n0.nic.construction
Discovered via network scan
IHNetworks, LLC
AS33494
Technology: Mobile
DNS Servers:
162.219.249.122
mail122.falcons.unisonplatform.com
162.219.249.123
mail123.falcons.unisonplatform.com
162.219.250.165
mail165.browns.unisonplatform.com
162.219.250.184
mail184.browns.unisonplatform.com
162.219.250.187
mail187.browns.unisonplatform.com
162.219.250.19
ns1.redsox.unisonplatform.com
162.219.250.190
mail190.browns.unisonplatform.com
162.219.251.104
ns2.europe.eleven2.com
Discovered via network scan
Amazon.com, Inc.
AS14618
Technology: DSL, Mobile
DNS Servers:
100.24.251.71
ns3.yourpracticeonline.com
107.20.239.90
ns1.foxfilm.com
107.22.194.236
clientmail003.securednsserver.net
107.23.35.58
dns5.namescout.com
107.23.84.201
dns6.namescout.com
13.216.0.109
ns2.isosonic.co
18.204.100.128
dns1.exmworkspace.com
18.206.141.45
ns1.dm4productions.com
Discovered via network scan
Google LLC
AS396982
DNS Servers:
104.196.126.247
ns2.kadifeli.com
104.196.133.224
ns1.curiolane.net
104.197.170.33
beat.pulsedns.com
104.197.200.143
cpinstance.cpanelcontrolpanel.com
104.198.44.109
ns1.novexhost.com
104.232.25.96
nsvm1.highwire.org
130.211.189.130
ns2.lostland.net
130.211.237.10
ns01.linuxhost.cl
Discovered via network scan
Internap Holding LLC
AS32475
Technology: DSL, Mobile
DNS Servers:
107.6.148.18
emerald.superdnssite.com
107.6.148.19
emerald.superdnssite.com
107.6.148.20
emerald.superdnssite.com
107.6.148.21
emerald.superdnssite.com
108.163.194.171
pro.superdnssite.com
108.163.194.173
pro.superdnssite.com
108.163.194.174
valdigitalsolutions.com
108.163.201.220
server.consultelhosting.net
Discovered via network scan
Madgenius.com
AS55154
DNS Servers:
38.92.185.193
mail.brighthorizonspace.info
173.243.116.109
DNS Server
173.243.116.110
DNS Server
173.243.116.111
DNS Server
173.243.116.112
DNS Server
173.243.116.113
DNS Server
173.243.116.60
DNS Server
173.243.116.61
DNS Server
Discovered via network scan
dataforest GmbH
AS215607
Technology: DSL
DNS Servers:
64.69.121.10
10.121.69.64.rdns.colocationamerica.com
64.69.121.121
121.121.69.64.rdns.colocationamerica.com
64.69.121.128
128.121.69.64.rdns.colocationamerica.com
64.69.121.13
13.121.69.64.rdns.colocationamerica.com
64.69.121.14
14.121.69.64.rdns.colocationamerica.com
64.69.121.15
15.121.69.64.rdns.colocationamerica.com
64.69.121.151
151.121.69.64.rdns.colocationamerica.com
64.69.121.152
152.121.69.64.rdns.colocationamerica.com
Discovered via network scan
RH & Co. IT Services Ltd
AS205220
DNS Servers:
104.164.74.10
DNS Server
104.164.74.100
DNS Server
104.164.74.101
DNS Server
104.164.74.102
DNS Server
104.164.74.103
DNS Server
104.164.74.104
DNS Server
104.164.74.105
DNS Server
104.164.74.106
DNS Server
Discovered via network scan
PG8 Global LLC
AS204765
Technology: DSL, Fixed Wireless
DNS Servers:
64.83.76.118
118.76.83.64.rdns.colocationamerica.com
64.83.76.119
119.76.83.64.rdns.colocationamerica.com
64.83.76.120
120.76.83.64.rdns.colocationamerica.com
64.83.76.121
121.76.83.64.rdns.colocationamerica.com
64.83.76.122
122.76.83.64.rdns.colocationamerica.com
64.83.76.127
127.76.83.64.rdns.colocationamerica.com
64.83.76.128
128.76.83.64.rdns.colocationamerica.com
64.83.76.129
129.76.83.64.rdns.colocationamerica.com
Discovered via network scan

Content Provider

4 providers
Unified Layer
AS46606
Technology: DSL
DNS Servers:
108.167.140.101
ns8316.hostgator.com
108.167.140.12
ns8312.hostgator.com
108.167.140.128
ns8313.hostgator.com
108.167.140.129
ns8314.hostgator.com
108.167.140.147
ns8318.hostgator.com
108.167.140.164
ns8321.hostgator.com
108.167.140.165
ns8322.hostgator.com
108.167.140.192
ns8328.hostgator.com
Discovered via network scan
Akamai International B.V.
AS20940
DNS Servers:
104.100.168.102
a104-100-168-102.deploy.static.akamaitechnologies.com
104.100.168.108
a104-100-168-108.deploy.static.akamaitechnologies.com
104.100.168.68
a104-100-168-68.deploy.static.akamaitechnologies.com
104.100.168.69
a104-100-168-69.deploy.static.akamaitechnologies.com
104.100.168.71
a104-100-168-71.deploy.static.akamaitechnologies.com
104.100.168.93
a104-100-168-93.deploy.static.akamaitechnologies.com
104.100.168.94
a104-100-168-94.deploy.static.akamaitechnologies.com
104.103.68.119
a104-103-68-119.deploy.static.akamaitechnologies.com
Discovered via network scan
Oracle Corporation
AS31898
DNS Servers:
108.167.155.80
ns1732.websitewelcome.com
108.167.157.172
ns2.henryivory.com
108.59.166.200
ns1.p200.dns.oraclecloud.net
108.59.170.200
ns3.p200.dns.oraclecloud.net
108.59.170.201
ns3.p201.dns.oraclecloud.net
108.59.170.202
ns3.p202.dns.oraclecloud.net
108.59.170.203
ns3.p203.dns.oraclecloud.net
108.59.171.0
ns21.hsbc.net
Discovered via network scan
Hostwinds LLC.
AS54290
DNS Servers:
104.168.133.125
client-104-168-133-125.hostwindsdns.com
104.168.135.63
client-104-168-135-63.hostwindsdns.com
104.168.135.75
client-104-168-135-75.hostwindsdns.com
104.168.137.134
client-104-168-137-134.hostwindsdns.com
104.168.137.17
client-104-168-137-17.hostwindsdns.com
104.168.137.174
client-104-168-137-174.hostwindsdns.com
104.168.137.27
client-104-168-137-27.hostwindsdns.com
104.168.137.40
client-104-168-137-40.hostwindsdns.com
Discovered via network scan

Enterprise

1 provider
Amazon.com, Inc.
AS16509
Technology: Mobile
DNS Servers:
100.20.110.240
mail.onlinedigitalsolutions.ca
100.20.31.111
prohost-ns02.acsol.net
100.20.84.65
ddns-d.dns.dnobori.jp
100.21.27.241
ns2.cargo.site
100.21.56.33
ns2.hem42.com
100.22.24.115
ns4.konnections.com
13.56.40.145
ns2.servera.lt
13.56.42.119
ns3.netcraft.com.au
Discovered via network scan

Network Service Provider

10 providers
CenturyLink Communications, LLC
AS209
Technology: Cable, DSL
DNS Servers:
63.230.12.217
www.unsupported.org
63.239.64.92
hansenhalloweenhaunt.party
65.102.36.212
ns1.multiportservices.net
65.153.73.6
gcyns1.fwrdns.com
66.218.245.13
ns1.cablemo.net
66.77.93.121
ns1.101m3.com
66.77.93.122
ns2.101m3.com
67.135.181.28
dns2.rsiinc.com
Discovered via network scan
Turnkey Internet Inc.
AS40244
DNS Servers:
162.213.122.67
ns558a.hostpc.com
162.213.122.68
ns558b.hostpc.com
162.250.203.145
www.brazilfootballfans.info
66.206.38.187
transform.ae
66.206.39.22
ns2.xyonet.dev
67.231.240.114
webserver70.privatelabeldns.com
67.231.241.131
ns30a.turnkeywebspace.com
67.231.241.132
ns30b.turnkeywebspace.com
Discovered via network scan
Verizon Business
AS701
Technology: DSL, Mobile
DNS Servers:
100.36.51.227
ns.digipro.com
108.44.206.28
dns0.aitken.com
108.48.19.131
ns.specialsystems.net
108.48.42.70
ns3.13x.com
108.55.3.139
ns1.iceinet.com
108.55.3.140
ns2.iceinet.com
142.77.2.133
cache04.ca-dns.net
142.77.2.36
cache02.ca-dns.net
Discovered via network scan
The Constant Company, LLC
AS20473
Technology: Fiber, Fixed Wireless
DNS Servers:
104.156.229.117
sjc.ns.junesta.net
104.156.247.124
dns2.topdn.net
104.156.253.50
ns3.etherwright.net
104.207.128.92
digital-conceptions.org
104.207.141.138
ns2.dnsowl.com
104.207.141.19
dns-ord.cfhg.net
104.207.142.233
ns4.server.plus
104.207.143.131
ns2.mbtechhost.com
Discovered via network scan
HIVELOCITY, Inc.
AS29802
Technology: DSL, Mobile
DNS Servers:
104.156.48.166
ns2.temok.com
104.156.48.203
ns3.oneparkplace.net
104.156.57.190
ns2.dant.com
104.254.61.30
104-254-61-30.rdns.owned-networks.net
107.155.112.19
host.ttinovations.com
107.155.127.126
samoan.lineadns.com
107.155.66.43
ns2.cubicadns.com
107.155.68.7
ns2.sucursaleshircasa.com
Discovered via network scan
NTT America, Inc.
AS2914
Technology: DSL
DNS Servers:
129.250.31.21
auth3.ns.gin.ntt.net
129.250.35.229
dnsauth01.dllstx09.us.to.gin.ntt.net
129.250.35.230
dnsauth02.dllstx09.us.to.gin.ntt.net
129.250.35.250
x.ns.gin.ntt.net
129.250.35.251
y.ns.gin.ntt.net
131.103.21.80
dns1.nttdacloud.com
131.103.21.81
dns2.nttdacloud.com
96.126.131.202
designomittoot.transcarolinains.com
Discovered via network scan
AT&T Enterprises, LLC
AS7018
Technology: DSL
DNS Servers:
107.197.237.75
107-197-237-75.lightspeed.nsvltn.sbcglobal.net
107.197.238.129
107-197-238-129.lightspeed.nsvltn.sbcglobal.net
107.197.239.216
107-197-239-216.lightspeed.nsvltn.sbcglobal.net
12.11.82.5
ns3.icnc.com
12.218.241.10
ns1.honovi.net
12.28.98.3
ns1.conleypublishing.com
12.37.71.4
ns2.administrative.com
12.47.219.2
ns1.racingchannel.com
Discovered via network scan
Cogent Communications, LLC
AS174
Technology: Fiber, Mobile
DNS Servers:
104.153.208.253
rdns1.dnsslave.com
104.153.208.254
rdns2.dnsslave.com
38.101.174.34
dns01.brauncg.com
38.108.103.184
ns1.gopiro.com
38.108.112.23
onlinecourtreservations.com
38.109.190.69
ns1.accs.net
38.109.190.70
ns2.accs.net
38.110.58.207
dc10202.htnsevrs.com
Discovered via network scan
IONOS SE
AS8560
Technology: Mobile
DNS Servers:
104.192.7.151
ns1.jellysourceserver.com
104.192.7.36
ns2.jellysourceserver.com
108.175.0.234
ns1.digitalmunchers.com
108.175.0.78
ns3.rd1.net
108.175.10.89
ns1.gwdhosting.com
108.175.11.121
bagsdirect.stanstedairport.com
108.175.11.123
ns1.jetsys.com
108.175.12.94
ns2.g1it-test.net
Discovered via network scan
TierPoint, LLC
AS17378
Technology: Mobile
DNS Servers:
130.51.180.99
ns2.coolcom.com
40.142.9.115
dns5.websiteinn.com
40.143.44.192
ns2.lab.hostedsolutions.com
63.254.158.194
ns5.mshop360.com
63.254.158.200
ns3.mshop360.com
65.99.205.100
svgtl78.cloud-mx-ns.net
65.99.205.113
svgel54.cloud-mx-ns.net
65.99.205.115
svgel55.cloud-mx-ns.net
Discovered via network scan

Internet Service Provider

1 provider
Comcast Cable Communications, LLC
AS7922
Technology: Cable, Fixed Wireless, Mobile
DNS Servers:
107.0.149.189
new-ns1.invidi.com
107.1.94.138
ns5.massasoit.mass.edu
162.150.21.21
SIKLanding-denv-cns03.sys.comcast.net
162.150.21.23
SIK2Landing-denv-cns02.sys.comcast.net
162.150.21.27
SIK3Landing-denv-cns03.sys.comcast.net
162.150.21.29
SIK4Landing-denv-cns02.comcast.net
162.150.21.42
cempprepaid-denv-cns03.sys.comcast.net
162.150.21.44
eoslanding-denv-cns02.sys.comcast.net
Discovered via network scan

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

For most users in United States, 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 States users

Frequently Asked Questions

What DNS does Comcast Xfinity use?

Comcast Xfinity operates its own DNS resolvers for customers. The specific IP addresses are listed above. These servers only work on Comcast Xfinity'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 States ISP intercept DNS queries?

Some ISPs in United States 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.