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[edit]

Name AS Number August 2021 degree[1][2] Reason
Hurricane Electric 6939 9243 IPv4: Purchases transit from Telia Carrier/AS1299.[3]
IPv6: Does not provide IPv6 routing/connectivity to Cogent/AS174.[4]
Telkom Indonesia International 7713 551 Purchases transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, Telecom Italia Sparkle/AS6762, Tata Communications/AS6453, Singtel/AS7473.
Korea Telecom 4766 578 Purchases transit from Level3/AS3356, Telia Carrier/AS1299, Cogent/AS174, Telecom Italia Sparkle/AS6762.
HGC Global 9304 637 Purchases transit from Cogent/AS174, NTT America/AS2914, Telecom Italia Sparkle/AS6762, Tata Communications/AS6453.
Fibrenoire 22652 127 Purchases transit from Telia Carrier/AS1299, Cogent/AS174, Tata Communications/AS6453, GTT/AS3257.
SK broadband 9318 537 Purchases transit from Telia Carrier/AS1299, Cogent/AS174, NTT America/AS2914, Tata Communications/AS6453, PCCW Global/AS3491, Verizon/AS701.
TDC 3292 191 Purchases transit from Level3/AS3356, Telia Carrier/AS1299.
Internet Initiative Japan 2497 329 Purchases transit from Level3/AS3356, Cogent/AS174, Verizon/AS701, NTT America/AS2914.
Vodafone (formerly Cable and Wireless) 1273 303 Purchases transit from Telia Carrier/AS1299.
KDDI 2516 308 Purchases transit from Level3/AS3356, Telia Carrier/AS1299, Verizon/AS701, Global Telecom & Technology (GTT)/AS3257.
PT Mora Telematika Indonesia 23947 243 Purchases transit from Cogent/AS174, Global Telecom & Technology (GTT)/AS3257, Hurricane Electric/AS6939.
China Telecom 4134/4809 318 Purchases transit from Level3/AS3356.
China Unicom 4837 310 Purchases transit from Level3/AS3356.
Chunghwa Telecom 3462 364 Purchases transit from Tata Communications/AS6453.
British Telecom 5400 151 Purchases transit from Level3/AS3356, Telia Carrier/AS1299, NTT America/AS2914.
Comcast 7922 192 Purchases transit from Tata Communications/AS6453, NTT America/AS2914.
Tele2 (formerly SWIPNet) 1257 167 Purchases transit from Sprint/AS1239, Cogent/AS174.
KCOM Group 12390 69 Purchases transit from KPN/AS286, Level 3/AS3356, Cogent/AS174, NTT America/AS2914.
Spirit Communications 2711 82 Purchases transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914.
Stealth Communications 8002 47 Purchases transit from Cogent/AS174, NTT America/AS2914.
Internap 14744 33 Purchases transit from Cogent/AS174, NTT America/AS2914, Verizon/AS701.
FiberRing 38930 35 Purchases transit from NTT America/AS2914, Telia Carrier/AS1299, Tata Communications/AS6453, Cogent/AS174.
Core-Backbone GmbH 33891 1311 Purchases transit from Level3/AS3356, Telia Carrier/AS1299.
Fiber Telecom 41327 2145 Purchases transit from Level3/AS3356, GTT/AS3257, Telecom Italia Sparkle/AS6762, Telia Carrier/AS1299.
Singtel 7473 359 Purchases transit from Telia Carrier/AS1299, Zayo/AS6461, Tata Communications/AS6453 and PCCW Global/AS3491.
SG.GS 24482 417 Purchases IP transit from NTT America/AS2914, Cogent/AS174 and Tata Communications/AS6453.
Turk Telekom International
(d/b/a Euroweb.ro)
9121/6663 250 Purchases IP transit from Level3/AS3356, Telia Carrier/AS1299, NTT America/AS2914, Deutsche Telekom Global Carrier/AS3320, China Telecom/AS4134&AS4809.

See also[edit]

References[edit]

  1. ^ https://asrank.caida.org/
  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.