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 2020 degree[1][2] Reason
Hurricane Electric 6939 8092 IPv4: Purchases transit from Telia Carrier/AS1299.[3]
IPv6: Does not provide IPv6 routing/connectivity to Cogent/AS174.[4]
Telkom Indonesia International 7713 2833 Purchases transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, Telecom Italia Sparkle/AS6762, Tata Communications/AS6453.
RETN 9002 1446 Purchases transit from Level 3/AS3356.
next layer 1764 987 Purchases transit from Level 3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, GTT/AS3257, Zayo France/AS8218.
meerfarbig 34549 688 Purchases transit from Telia Carrier/AS1299, Global Telecom & Technology (GTT)
Korea Telecom 4766 621 Purchases transit from Cogent/AS174, Telia Carrier/AS1299, Tata Communications/AS6453, Hurricane Electric/AS6939, Global Telecom & Technology (GTT)/AS4436, Sprint/AS1239.
Fibrenoire 22652 527 Purchases transit from Level3/AS3356, Tata Communications/AS6453, GTT/AS3257.
SK broadband 9318 489 Purchases transit from Tata Communications/AS6453, Verizon/AS701, Telia Carrier/AS1299, NTT America/AS2914, China Telecom/AS4134&AS4809.
TDC 3292 369 Purchases transit from Sprint/AS1239, NTT America/AS2914.
Internet Initiative Japan 2497 324 Purchases transit from NTT America/AS2914, Verizon/AS701.
Vodafone (formerly Cable and Wireless) 1273 314 Purchases transit from Telia Carrier/AS1299.
KDDI 2516 309 Purchases transit from Level3/AS3356, Tata Communications/AS6453, Verizon/AS701, Global Telecom & Technology (GTT)/AS3257, CenturyLink/AS209.
PT Mora Telematika Indonesia 23947 293 Purchases transit from NTT America/AS2914, GTT/AS3257, Tata Communications/AS6453.
China Telecom 4134/4809 285 Purchases transit from Verizon/AS701.
China Unicom 4837/10099 172 Purchases transit from Verizon/AS701, Cogent/AS174 and Level 3/AS3356.
British Telecom 5400 202 Purchases transit from Telia Carrier/AS1299 and NTT America/AS2914, Global Telecom & Technology (GTT)/AS4436.
Comcast 7922 195 Purchases transit from Tata Communications/AS6453, NTT America/AS2914.
Tele2 (formerly SWIPNet) 1257 192 Purchases transit from Sprint/AS1239, Cogent/AS174.
KCOM Group 12390 90 Purchases transit from KPN/AS286, Level 3/AS3356, Cogent/AS174, NTT America/AS2914.
Spirit Communications 2711 77 Purchases transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, GTT/AS3257, Hurricane Electric/AS6939.
Stealth Communications 8002 46 Purchases transit from Tata Communications/AS6453, Cogent/AS174, NTT America/AS2914.
Internap 14744 39 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.
Easynet 4589 9 Purchases transit including NTT America/AS2914, GTT/AS3257.

Small or less important Tier 2 networks[edit]

Name AS number August 2020 degree[1][2] Reason
SG.GS 24482 224 Purchases IP transit from NTT America/AS2914, Cogent/AS174 and Tata Communications/AS6453.
Coverage and customer cone limited to SG.
Turk Telekom International
(and Euroweb.ro)
6663 75 Purchases IP transit from Telia Carrier/AS1299, GTT/AS3257 and NTT America/AS2914.
Coverage and customer cone limited to TR & CEE.

See also[edit]

References[edit]

  1. ^ a b https://asrank.caida.org/
  2. ^ a b Visualizing Internet Topology at a Macroscopic Scale April 2005
  3. ^ "CAIDA AS Rank". 2016-01-25. Retrieved 2015-07-29. CS1 maint: discouraged parameter (link)
  4. ^ "Cogent - Google - HE Fun". 2016-03-09.