Knowledge Base

Anycast DNS for shared and reseller hosting accounts

This article discusses using Anycast DNS with shared hosting and reseller hosting accounts.

About Anycast

Anycast is a network routing and addressing methodology that provides several advantages:

  • Improved DNS query performance.
  • Redundancy.
  • Load balancing.

By default, shared hosting and reseller hosting accounts use Anycast for DNS. You do not need to do any additional configuration steps for your account to use Anycast.

The following Anycast name servers are the defaults for shared (a2hosting.com) and reseller hosting (supercp.com) accounts:

Shared hosting
Server name IP address
ns1.a2hosting.com 104.255.198.1
ns2.a2hosting.com 192.190.94.1
ns3.a2hosting.com 104.255.198.2
ns4.a2hosting.com 192.190.94.2
These servers have alternate names, nsX-any.a2hosting.com, where X is the server number (for example, the ns1.a2hosting.com server can also be referenced as ns1-any.a2hosting.com).
Reseller hosting
Server name IP address
ns1.supercp.com 104.255.198.3
ns2.supercp.com 192.190.94.3
ns3.supercp.com 104.255.198.4
ns4.supercp.com 192.190.94.4
These servers have alternate names, nsX-any.supercp.com, where X is the server number (for example, the ns1.supercp.com server can also be referenced as ns1-any.supercp.com).

Optional: Using region-specific name servers

If you do not want to use Anycast for your account's DNS, you can optionally use specific name servers for a geographic region. You may want to do this if:

  • You experience routing issues using the Anycast DNS name servers.
  • You want to use a specific geographic region for your domain's DNS.

The following lists show the geographic-specific name servers and their respective IP addresses.

  • These servers do not use Anycast for routing and addressing.
  • For information about how to change the name servers for a domain, please see this article.
United States

The following name servers are for the United States geographic region:

Shared hosting
Server name IP address
ns1-us.a2hosting.com 70.32.23.254
ns2-us.a2hosting.com 66.198.254.254
ns3-us.a2hosting.com 70.32.23.253
ns4-us.a2hosting.com 66.198.254.253
Reseller hosting
Server name IP address
ns1-us.supercp.com 70.32.23.252
ns2-us.supercp.com 66.198.254.252
ns3-us.supercp.com 70.32.23.251
ns4-us.supercp.com 66.198.254.251
Amsterdam, The Netherlands

The following name servers are for the Amsterdam, The Netherlands geographic region:

Shared hosting
Server name IP address
ns1-nl.a2hosting.com 209.124.68.254
ns2-nl.a2hosting.com 67.209.119.254
ns3-nl.a2hosting.com 209.124.68.253
ns4-nl.a2hosting.com 67.209.119.253
Reseller hosting
Server name IP address
ns1-nl.supercp.com 209.124.68.252
ns2-nl.supercp.com 67.209.119.252
ns3-nl.supercp.com 209.124.68.251
ns4-nl.supercp.com 67.209.119.251
Singapore

The following name servers are for the Singapore geographic region:

Shared hosting
Server name IP address
ns1-sg.a2hosting.com 45.120.151.254
ns2-sg.a2hosting.com 67.209.123.254
ns3-sg.a2hosting.com 45.120.151.253
ns4-sg.a2hosting.com 67.209.123.253
Reseller hosting
Server name IP address
ns1-sg.supercp.com 45.120.151.252
ns2-sg.supercp.com 67.209.123.252
ns3-sg.supercp.com 45.120.151.251
ns4-sg.supercp.com 67.209.123.251

More Information

For more information about Anycast, please visit https://en.wikipedia.org/wiki/Anycast.