Every backbone in the Tier 1 club: networks that buy no transit from anyone and reach the global internet entirely through settlement-free peering. There is no official list. This is the BGP community consensus, with each entry profiled and cross-linked to its ASN page.
Arelion operates AS1299, formerly known as Telia Carrier and TeliaSonera International Carrier. The network is widely considered the highest-quality Tier 1 by latency and reach, particularly across the Nordics and into Asia. Acquired by Pol…
AT&T operates AS7018 as its core IP backbone. The network is one of the oldest still in service (descended from the original BBN-built ARPANET). Among the few US carriers with both retail and Tier 1 transit at scale.…
Cogent operates AS174, a global Tier 1 known for aggressive transit pricing and the long-running depeering disputes with Hurricane Electric over IPv6 connectivity. It runs more than 50 metro fiber networks and one of the densest peering foo…
Deutsche Telekom operates AS3320 through its International Carrier Sales and Solutions (ICSS) division. Tier 1 by virtue of being settlement-free with every other Tier 1. Substantial European backbone footprint, integrated with retail and m…
GTT operates AS3257, a Tier 1 backbone assembled through aggressive M&A in the 2010s, peaking with the 2018 Interoute acquisition. Went through Chapter 11 reorganisation in 2021 and emerged with the backbone intact.…
Liberty Global operates AS6830 as the consolidated backbone of UPC, Virgin Media, Telenet and the various Liberty Global national operators. Tier 1 by inherited peering relationships from each constituent carrier.…
Lumen operates AS3356, the largest IP backbone by autonomous-system relationships on the public internet. The network was assembled through a string of mergers (Level 3 acquired Global Crossing in 2011; CenturyLink acquired Level 3 in 2017;…
NTT operates AS2914, the global IP backbone of NTT Communications. Strong in trans-Pacific routes and Asian backbone connectivity. Notable for being one of the few Tier 1 carriers with substantial native Asia-Pacific presence.…
Orange operates AS5511 through Orange OpenTransit. Tier 1 by historic settlement-free relationships with the other major carriers. Strong franco-african footprint via the FT-Orange subsea cable assets.…
PCCW Global operates AS3491, a Tier 1 with the densest network across Asia Pacific and strong Europe-Asia transit routes. Notable Hong Kong, Singapore and Tokyo POPs.…
Tata Communications operates AS6453, formerly VSNL, a Tier 1 with a particularly strong India-to-everywhere transit footprint and significant submarine cable ownership. Notable for the longest single-AS reach across the Indian Ocean and int…
Sparkle operates AS6762, the international wholesale backbone of Telecom Italia. Strong presence in the Mediterranean basin, Latin America (via the Seabras-1 cable), and across MENA.…
Telxius operates AS12956, the international wholesale arm of Telefónica. Strong submarine cable portfolio including MAREA (Spain-USA) and BRUSA (Brazil-USA). Spun out of Telefónica in 2016; substantial KKR ownership.…
Verizon operates AS701 as the core backbone of Verizon Business (formerly UUNET). One of the oldest commercial IP networks. The "Big West" of the early commercial internet, alongside AT&T and Sprint.…
Zayo operates AS6461 (formerly MFN/AboveNet), one of the densest North American metro fiber footprints. Heavy in inter-datacenter and cloud-on-ramp transit. Owned by EQT Infrastructure and Digital Bridge since 2020.…
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