Connecting the mobile industry, so it can exchange roaming and interconnect traffic safely and in a timely manner.

What is GSMA Root DNS? 

The GSMA Root DNS (Domain Name System) service enables communication between industry participants in a private network. Companies register domain information on a dedicated online portal for domain names, which is then authenticated and distributed by DNS servers maintained by the GSMA.  

Why is it important for your business?

As the industry transitions to 4G and 5G’s packet-based technology, mobile operators need a carrier-grade root DNS service they can rely on. 

Added resilience  

The GSMA operates its Root DNS service at multiple peering points, allowing easy access and added resilience. 

Speedy responses 

Copies of DNS zone files are available through zone transfer points, enabling additional DNS servers to be deployed, ensuring quick responses from operators. 

Authorised and authenticated 

All domain changes are reviewed and endorsed prior to approval to make sure that critical network configuration is protected.  

Practical examples of what it can do 

Find out how GSMA Root DNS is integral to connectivity in the 5G era. 


Root DNS provides the important bridge for the customer when they’re serviced by another network while roaming. 

  • It connects them back to their home network and mobile subscription, so authentication and communication can take place. 
  • An additional domain name,, supports IPX functions in 5G roaming.  


For network services on 4G and 5G that rely on the IP Multimedia Subsystem (IMS), standardised domains have been defined by 3GPP and the GSMA to facilitate easy connectivity for interconnect traffic. 

  • Two standardised domain names .gprs and are responsible for enabling various packet-based services to communicate in the mobile ecosystem, at home or roaming. 

Register your interest

Please get in touch if you need more information, would like to book a meeting, have a product demo or want to talk to us about your particular use case.