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 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 2244 Purchases transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, Telecom Italia Sparkle/AS6762, Tata Communications/AS6453.
Korea Telecom 4766 591 Purchases transit from Cogent/AS174, Telia Carrier/AS1299, Tata Communications/AS6453, Hurricane Electric/AS6939, Global Telecom & Technology (GTT)/AS4436, Sprint/AS1239.
Fibrenoire 22652 486 Purchases transit from Level3/AS3356, Tata Communications/AS6453, GTT/AS3257.
9318 596 Purchases transit from Tata Communications/AS6453, Verizon/AS701, Telia Carrier/AS1299, NTT America/AS2914, China Telecom/AS4134&AS4809.
TDC 3292 362 Purchases transit from Sprint/AS1239, NTT America/AS2914.
Internet Initiative Japan 2497 318 Purchases transit from NTT America/AS2914, Verizon/AS701.
Vodafone (formerly Cable and Wireless) 1273 313 Purchases transit from Telia Carrier/AS1299.
KDDI 2516 315 Purchases transit from Level3/AS3356, Tata Communications/AS6453, Verizon/AS701, Global Telecom & Technology (GTT)/AS3257, CenturyLink/AS209.
PT Mora Telematika Indonesia 23947 261 Purchases transit from NTT America/AS2914, GTT/AS3257, Tata Communications/AS6453.
China Unicom 4837/10099 131 Purchases transit from Verizon/AS701, Cogent/AS174 and Level 3/AS3356.
China Mobile 9808/58453 600 Purchases transit from Telstra/AS4637, Cogent/AS174, Level 3/AS3356,Telia Carrier/AS1299,NTT America/AS2914,Hurricane Electric/AS6939.
British Telecom 5400 229 Purchases transit from Telia Carrier/AS1299 and NTT America/AS2914, Global Telecom & Technology (GTT)/AS4436.
Comcast 7922 199 Purchases transit from Tata Communications/AS6453, NTT America/AS2914.
Tele2 (formerly SWIPNet) 1257 284 Purchases transit from Sprint/AS1239, Cogent/AS174.
KCOM Group 12390 121 Purchases transit from KPN/AS286, Level 3/AS3356, Cogent/AS174, NTT America/AS2914.
Spirit Communications 2711 85 Purchases transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, GTT/AS3257, Hurricane Electric/AS6939.
Stealth Communications 8002 65 Purchases transit from Tata Communications/AS6453, Cogent/AS174, NTT America/AS2914.
Internap 14744 33 Purchases transit from Cogent/AS174, NTT America/AS2914, XO Communications/AS2828, AboveNet/AS6461, CenturyLink/AS209, AT&T/AS7018.
FiberRing 38930 36 Purchases transit from NTT America/AS2914, Telia Carrier/AS1299, Tata Communications/AS6453, Cogent/AS174.
33891 1646 Purchases transit from Level3/AS3356, GTT/AS3257, Telia Carrier/AS1299 .
Fiber Telecom 41327 2060 Purchases transit from Level3/AS3356, GTT/AS3257, Telecom Italia Sparkle/AS6762, Telia Carrier/AS1299, NTT America/AS2914, Zayo/AS6461, Cogent/AS174, Tata Communications/AS6453.
SG.GS 24482 6054 Purchases IP transit from NTT America/AS2914, Cogent/AS174 and Tata Communications/AS6453.
Turk Telekom International
(d/b/a Euroweb.ro) 		9121 275 Purchases IP transit from Telia Carrier/AS1299, GTT/AS3257 and NTT America/AS2914.

See also[]

  • Peering point
  • Network access point

References[]

  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.
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