Tier 2 network

{{Short description|Internet service provider leasing connectivity from one or more primary ("Tier 1") ISPs

}}

File:Internet Connectivity Distribution & Core.svg

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.{{cite web | title=What is a Tier 2 ISP?|last1=Norton |first1=William B.|url=https://drpeering.net/white-papers/Ecosystems/Tier-2-ISP.html |website=DrPeering |access-date=15 September 2023}}

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

class="wikitable sortable"
Name ! AS Number ! August 2021 degree{{Cite web\|url=https://asrank.caida.org/\|title=AS Rank: A ranking of the largest Autonomous Systems (AS) in the Internet.\|website=asrank.caida.org}}[http://www.caida.org/research/topology/as_core_network/ Visualizing Internet Topology at a Macroscopic Scale] April 2005 ! Reason
Hurricane Electric \| 6939 \|9243 \| IPv4: Purchases transit from Arelion/AS1299.{{Cite web\|url=http://as-rank.caida.org/?mode0=as-info&mode1=as-table&as=6939\|title=CAIDA AS Rank\|accessdate=2015-07-29\|date=2016-01-25}} IPv6: Does not provide IPv6 routing/connectivity to Cogent/AS174.{{cite web\|url=http://mailman.nanog.org/pipermail/nanog/2016-March/084611.html\|title=Cogent - Google - HE Fun\|date=2016-03-09}}
Telkom Indonesia International \| 7713 \|551 \| Purchases transit from Level3/AS3356, Cogent/AS174, Arelion/AS1299, NTT America/AS2914, Telecom Italia Sparkle/AS6762, Tata Communications/AS6453, Singtel/AS7473.
RETN \|9002 \|1446 \|Purchases transit from Level 3/AS3356, Purchases transit from Telecom Italia Sparkle/AS6762.
next layer \|1764 \|987 \|Purchases transit from Level 3/AS3356, Cogent/AS174, Arelion/AS1299, NTT America/AS2914, GTT/AS3257.
meerfarbig \| 34549 \|688 \| Purchases transit from Arelion/AS1299, Global Telecom & Technology (GTT)
Korea Telecom \| 4766 \|578 \| Purchases transit from Level3/AS3356, Arelion/AS1299, Cogent/AS174, Telecom Italia Sparkle/AS6762.
[http://www.fibrenoire.ca/en/ Fibrenoire] \| 22652 \|127 \| Purchases transit from Arelion/AS1299, Cogent/AS174, Tata Communications/AS6453, GTT/AS3257.
SK broadband \| 9318 \|537 \| Purchases transit from Arelion/AS1299, Cogent/AS174, NTT America/AS2914, Tata Communications/AS6453, PCCW Global/AS3491, Verizon/AS701.
TDC \| 3292 \|191 \| Purchases transit from Level3/AS3356, Arelion/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 Arelion/AS1299.
KDDI \| 2516 \|308 \| Purchases transit from Level3/AS3356, Arelion/AS1299, Verizon/AS701, Global Telecom & Technology (GTT)/AS3257.
[http://www.moratelindo.co.id/en/ 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 Cogent/AS174, Verizon/AS701, Level3/AS3356.
China Unicom \| 4837 \|310 \| Purchases transit from Cogent/AS174, Verizon/AS701,Sprint/AS1239, Level3/AS3356, Orange S.A./AS5511.
Chunghwa Telecom \| 3462 \|364 \| Purchases transit from Level3/AS3356, Tata Communications/AS6453, NTT America/AS2914, Arelion/AS1299, Cogent/AS174.
British Telecom \| 5400 \|151 \| Purchases transit from Level3/AS3356, Arelion/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.
[https://www.spiritcom.com/ Spirit Communications] \| 2711 \|82 \| Purchases transit from Level3/AS3356, Cogent/AS174, Arelion/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.
[http://www.fiberring.com/ FiberRing] \| 38930 \|35 \| Purchases transit from NTT America/AS2914, Arelion/AS1299, Tata Communications/AS6453, Cogent/AS174.
Core-Backbone GmbH \| 33891 \|1311 \| Purchases transit from Level3/AS3356, Arelion/AS1299.
[https://www.fibertelecom.com/ Fiber Telecom] \| 41327 \|2145 \| Purchases transit from Level3/AS3356, GTT/AS3257, Telecom Italia Sparkle/AS6762, Arelion/AS1299.
Singtel \| 7473 \|359 \| Purchases transit from Arelion/AS1299, Zayo/AS6461, Tata Communications/AS6453 and PCCW Global/AS3491.
[http://www.sg.gs/ SG.GS] \| 24482 \|417 \| Purchases IP transit from NTT America/AS2914, Cogent/AS174 and Tata Communications/AS6453.
[https://turktelekomint.com/ Turk Telekom International] (d/b/a Euroweb.ro) \| 9121/6663 \|250 \| Purchases IP transit from Level3/AS3356, Arelion/AS1299, NTT America/AS2914, Deutsche Telekom Global Carrier/AS3320, China Telecom/AS4134&AS4809.
EdgeUno \|7195 \|758 \|Purchases transit from Level3/AS3356, Cogent/AS174, Arelion/AS1299, NTT America/AS2914.

class="wikitable sortable"

Name

! AS Number

! August 2021 degree{{Cite web|url=https://asrank.caida.org/|title=AS Rank: A ranking of the largest Autonomous Systems (AS) in the Internet.|website=asrank.caida.org}}[http://www.caida.org/research/topology/as_core_network/ Visualizing Internet Topology at a Macroscopic Scale] April 2005

! Reason

Hurricane Electric

| 6939

|9243

| IPv4: Purchases transit from Arelion/AS1299.{{Cite web|url=http://as-rank.caida.org/?mode0=as-info&mode1=as-table&as=6939|title=CAIDA AS Rank|accessdate=2015-07-29|date=2016-01-25}}
IPv6: Does not provide IPv6 routing/connectivity to Cogent/AS174.{{cite web|url=http://mailman.nanog.org/pipermail/nanog/2016-March/084611.html|title=Cogent - Google - HE Fun|date=2016-03-09}}

Telkom Indonesia International

| 7713

|551

| Purchases transit from Level3/AS3356, Cogent/AS174, Arelion/AS1299, NTT America/AS2914, Telecom Italia Sparkle/AS6762, Tata Communications/AS6453, Singtel/AS7473.

RETN

|9002

|1446

|Purchases transit from Level 3/AS3356,

Purchases transit from Telecom Italia Sparkle/AS6762.

next layer

|1764

|987