List of Tier 1 ISP in India Tier 1 ISPs, or the backbone internet providers, basically own or control their own portion of the internet. They own the infrastructure on which the internet’s backbone is built and provide traffic to other ISPs, not end users. Let’s take a look at the list of Tier 1 ISPs in this post. https://www.registrationwala.com/knowledge-base/telecom/dot-consultants/list-of-tier-1-isp-in-india