DNS addresses of Internet service providers

What is a DNS server and why change it?

DNS stands for Domain Name Service. This is a special server that maps a server name to an IP address. Let’s take an example: open your web browser and type this IP address in the address bar: 216.58.198.195. You will find yourself directly on the main page of the Google search engine. Thanks to the DNS server, the name www.google.fr is converted into an IP address.

Service providers have their own DNS that is automatically assigned to you when you connect to the Internet. It can be useful to know them in case of manual configuration of the connection (for example in the case of a local network) or if you prefer to use DNS other than those of your access provider. In Windows, DNS can be configured in the TCP/IP configuration of your network connection.

It can also be useful to modify them to speed up access to certain sites… but this remains marginal. Another reason to change DNS is to no longer depend on the filtering put in place by an ISP, or the restriction placed on certain sites or content. Attention, this remains a manipulation reserved for experienced users.

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How to change DNS addresses with Windows?

  • Go to the menu SETTINGS or type Settings in the search box of Windows 10. Then select Network and Internet -> Status -> Network and Sharing Center
  • Select on the left of the window, “Edit map settings” then select the Internet access card in the window. It often shows ‘Local Area Connection’ with the name of the material below (type Realtek PCIe GBE family controller).
  • Right click on it and click the menu Properties. Click on Internet Protocol Version 4 (TCP/IP) then back to Properties
  • By default, DNS addresses are resolved automatically.
  • Choose a manual configuration at the bottom filling in the Primary and Secondary DNS fields with server addresses of your choice (see below)

How to change DNS addresses on Mac OS?

  • Go to the menu SETTINGS then in The network then in DNS.
  • Just add the primary and secondary DS shown below there as well.

List of DNS servers of major carriers

Access provider Primary DNS Secondary DNS
DNS Bouygues Telecom 194.158.122.10 194.158.122.15
Free DNS 212.27.40.240 212.27.40.241
SFR-DNS 109.0.66.10 109.0.66.20
Orange DNS 80.10.246.2 80.10.246.129
OVH DNS 91.121.61.147 87.98.149.171

List of alternate DNS servers

LAST Primary DNS Secondary DNS
Google 8.8.8.8 8.8.4.4
Cloudfare 1.1.1.1 1.0.0.1
OpenDNS 208.67.222.222 208.67.220.220

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