Tier 2 network

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A Tier 2 network is an Internet service provider which engages in the practice of peering with other networks, but which also purchases IP transit to reach some portion of the Internet.


Tier 2 providers are the most common Internet service providers, as it is much easier to purchase transit from a Tier 1 network than to peer with them and attempt to become a Tier 1 carrier.

The term Tier 3 is sometimes also used to describe networks who solely purchase IP transit from other networks to reach the Internet.

List of large or important Tier 2 networks

Name AS Number August 2020 degree [1] [2] Reason
Hurricane Electric 69398092IPv4: Purchases transit from Telia Carrier/AS1299. [3]
IPv6: Does not provide IPv6 routing/connectivity to Cogent/AS174. [4]
Telkom Indonesia International 77132833Purchases transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, Telecom Italia Sparkle/AS6762, Tata Communications/AS6453.
RETN 90021446Purchases transit from Level 3/AS3356.
meerfarbig 34549688Purchases transit from Telia Carrier/AS1299, Global Telecom & Technology (GTT)
Korea Telecom 4766621Purchases transit from Cogent/AS174, Telia Carrier/AS1299, Tata Communications/AS6453, Hurricane Electric/AS6939, Global Telecom & Technology (GTT)/AS4436, Sprint/AS1239.
Fibrenoire 22652527Purchases transit from Level3/AS3356, Tata Communications/AS6453, GTT/AS3257.
SK broadband 9318489Purchases transit from Tata Communications/AS6453, Verizon/AS701, Telia Carrier/AS1299, NTT America/AS2914, China Telecom/AS4134&AS4809.
TDC 3292369Purchases transit from Sprint/AS1239, NTT America/AS2914.
Internet Initiative Japan 2497324Purchases transit from NTT America/AS2914, Verizon/AS701.
Vodafone (formerly Cable and Wireless)1273314Purchases transit from Telia Carrier/AS1299.
KDDI 2516309Purchases transit from Level3/AS3356, Tata Communications/AS6453, Verizon/AS701, Global Telecom & Technology (GTT)/AS3257, CenturyLink/AS209.
PT Mora Telematika Indonesia 23947293Purchases transit from NTT America/AS2914, GTT/AS3257, Tata Communications/AS6453.
China Telecom 4134/4809239Purchases transit from Verizon/AS701.
British Telecom 5400202Purchases transit from Telia Carrier/AS1299 and NTT America/AS2914, Global Telecom & Technology (GTT)/AS4436.
Comcast 7922195Purchases transit from Tata Communications/AS6453, NTT America/AS2914.
Tele2 (formerly SWIPNet)1257192Purchases transit from Sprint/AS1239, Cogent/AS174.
KCOM Group 1239090Purchases transit from KPN/AS286, Level 3/AS3356, Cogent/AS174, NTT America/AS2914.
Spirit Communications 271177Purchases transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, GTT/AS3257, Hurricane Electric/AS6939.
Stealth Communications 800246Purchases transit from Tata Communications/AS6453, Cogent/AS174, NTT America/AS2914.
Internap 1474439Purchases transit from Cogent/AS174, NTT America/AS2914, XO Communications/AS2828, AboveNet/AS6461, CenturyLink/AS209, AT&T/AS7018.
FiberRing 3893036Purchases transit from NTT America/AS2914, Telia Carrier/AS1299, Tata Communications/AS6453, Cogent/AS174.
Easynet 45899Purchases transit including NTT America/AS2914, GTT/AS3257.

Small or less important Tier 2 networks

Name AS Number August 2020 degree [1] [2] Reason
SG.GS24482224Purchases IP transit from NTT, Cogent and TATA.
Coverage and customer cone limited to SG.
Turk Telekom International
(and Euroweb.ro)
666375Purchases IP transit from Telia, GTT and NTT.
Coverage and customer cone limited to TR & CEE.

See also

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  1. 1 2 https://asrank.caida.org/
  2. 1 2 Visualizing Internet Topology at a Macroscopic Scale April 2005
  3. "CAIDA AS Rank". 2016-01-25. Retrieved 2015-07-29.
  4. "Cogent - Google - HE Fun". 2016-03-09.