Tier 2 network
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 it is to peer with them and attempt becoming 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 | September 2016 degree[1][2] | Reason |
---|---|---|---|
Hurricane Electric | 6939 | 4809 | IPv4: Buys transit from Telia Carrier/AS1299.[3] IPv6: Does not provide IPv6 routing/connectivity to Cogent/AS174.[4] |
Cogent Communications (formerly PSINet) | 174 | 4641 | IPv6: Does not provide IPv6 routing/connectivity to Google/AS15169 or Hurricane Electric/AS6939.[4][5] |
Interoute | 8928 | 552 | Uses transit from GTT/AS3257.[6] |
Korea Telecom | 4766 | 492 | Buys transit from Cogent/AS174, Telia Carrier/AS1299, Tata Communications/AS6453, Hurricane Electric/AS6939, Global Telecom & Technology (GTT)/AS4436, Sprint/AS1239. |
China Telecom | 4134/4809 | 151 | Buys transit from Verizon/AS701. |
KDDI | 2516 | 310 | Buys transit from Level3/AS3356, Tata Communications/AS6453, Verizon/AS701, Global Telecom & Technology (GTT)/AS3257, CenturyLink/AS209. |
Internet Initiative Japan | 2497 | 307 | Buys transit from NTT America/AS2914, Verizon/AS701. |
SK broadband | 9318 | 484 | Buys transit from Tata Communications/AS6453, Verizon/AS701, Telia Carrier/AS1299, NTT America/AS2914, China Telecom/AS4134&AS4809. |
Vodafone (formerly Cable and Wireless) | 1273 | 296 | Buys transit from Level 3 Communications/AS3356, Telia Carrier/AS1299, Verizon Enterprise Solutions (formerly UUNET)/AS701, Global Telecom & Technology (GTT)/AS3257. |
Vodafone (formerly ARCOR AG Germany) | 3209 | 166 | Buys transit from Level3/AS3356, Telia Carrier/AS1299, Verizon Enterprise Solutions (formerly UUNET)/AS701, nLayer Communications/AS4436, Pacnet/AS10026.[7] |
Telkom Indonesia International | 7713 | 258 | Buys transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, Telecom Italia Sparkle/AS6762, Tata Communications/AS6453. |
TDC | 3292 | 221 | Buys transit from Sprint/AS1239, NTT America/AS2914. |
Virgin Media | 5089 | 192 | Buys transit from GTT/AS3257, Liberty Global/AS6830. |
Comcast | 7922 | 160 | Buys transit from Tata Communications/AS6453, NTT America/AS2914. |
PT Mora Telematika Indonesia | 23947 | 158 | Buys transit from NTT America/AS2914, GTT/AS3257, Tata Communications/AS6453. |
British Telecom | 5400 | 155 | Buys transit from Telia Carrier/AS1299 and NTT America/AS2914, Global Telecom & Technology (GTT)/AS4436. |
Easynet | 4589 | 108 | Buys transit including NTT America/AS2914, GTT/AS3257. |
Tele2 (formerly SWIPNet) | 1257 | 107 | Buys transit from Sprint/AS1239, Cogent/AS174. |
Fibrenoire | 22652 | 79 | Buys transit from Level3/AS3356, Tata Communications/AS6453, GTT/AS3257. |
Spirit Communications | 2711 | 70 | Buys transit from Level3/AS3356, Cogent/AS174, Telia Carrier/AS1299, NTT America/AS2914, GTT/AS3257, Hurricane Electric/AS6939. |
FiberRing | 38930 | 59 | Buys transit from NTT America/AS2914, Telia Carrier/AS1299, Tata Communications/AS6453, Cogent/AS174. |
Internap | 14744 | 43 | Buys transit from Cogent/AS174, NTT America/AS2914, XO Communications/AS2828, AboveNet/AS6461, CenturyLink/AS209, AT&T/AS7018. |
KCOM Group | 12390 | 37 | Buys transit from KPN/AS286, Level 3/AS3356, Cogent/AS174, NTT America/AS2914. |
Stealth Communications | 8002 | 28 | Buys transit from Tata Communications/AS6453, Cogent/AS174. |
RETN | 9002 | 620 | Buys transit from Level 3/AS3356, NTT America/AS2914. |
See also
References
- ↑ CAIDA AS ranking
- ↑ Visualizing Internet Topology at a Macroscopic Scale April 2005
- ↑ "CAIDA AS Rank". 2016-01-25. Retrieved 2015-07-29.
- 1 2 "Cogent - Google - HE Fun". 2016-03-09.
- ↑ "No connectivity to Cogent IPv6 network". www.sixxs.net. Retrieved 5 February 2017.
- ↑ "GTT Completes Acquisition of Interoute". Interoute. 2018-05-31. Retrieved 2018-07-18.
- ↑ "CAIDA AS Rank". as-rank.caida.org. Retrieved 25 August 2017.
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