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What is IP Transit?

The Internet backbone is a network of public networks, or autonomous systems (AS) connected to each other. Autonomous systems are essentially a unique collection of IP addresses/address blocks and network hardware within a common administrative domain. They are like independent, digital countries – each with a distinct geographical footprint, infrastructure, and routing policy. 

For full Internet access, a connection needs to either be established directly with all of these networks, or by a connecting through a network that is connected in some way to all of the other networks on the Internet. Generally, retail or enterprise users buy access from a single service provider and effectively become a part of that network (from and IP addressing point-of-view, at least). 

Autonomous systems communicate route information and steer traffic to each other using a protocol known as the Border Gateway Protocol, or BGP
IP Transit is a service by which networks have access to the rest of the Internet via BGP. In contrast to peering, where AS networks exchange only their own customer routes (on a mutual benefit and cost neutral basis), IP Transit is a commercial service whereby one network provides access to the entire Internet routing table (or a subset thereof), in return for payment. IP Transit services are typically charged on a usage basis, or by flat monthly fee. Because IP Transit services are based on BGP, networks buying IP Transit are required to operate and administer their own AS. A prerequisite for this is good knowledge of BGP routing and hardware capable of running it.

In contrast to services based on default routing, such as dedicated Internet access (DIA) and IP Connect, IP Transit affords larger networks greater routing flexibility and control.

Why Arelion IP Transit?

The #1 Internet backbone

Arelion’s #1 global IP network powers 65% of global Internet routes and connects you to 95% of US and European end-users within one network hop, providing the highest level of reliability, flexibility and security

Tier 1
We are one of the original Tier 1 networks, connecting billions of end-users to their critical content, applications and cloud services
Award-winning customer experience

Arelion provides exceptional customer care 24/7 – since 2014 we’ve been repeatedly recognised at the World Communications Awards for our Customer Experience and we have a very high NPS score of 44 (2020)


Flexibility-as-a-Service - our solutions are fully adapted to our customers’ needs and can be quickly adjusted, if business grows and locations change


Most of our services are based on a dynamic pay-per-use model where customers are charged for a service when they use it, giving the best value for money

Technical highlights
Our standard offer includes:
Carrier-grade SLA, including: installation, availability, round-trip delay, packet loss
Secure customer portal

Want to see our IP network performance?

World-class connectivity starts with a competitive network SLA. Here you can find monthly IP network performance metrics for our global Internet backbone, AS1299.