tier-1 network (ISPs)

List of tier 1 networks[edit]

These networks are recognised by the Internet community as tier 1 networks, even if some of them appear to have transit providers in CAIDA ranking.
NameHeadquartersAS numberJanuary 2016degree[8][9]Fiber Route Miles/KilometersPeering Policy
AT&T[10]United States70182,378410,000 miles[11]AT&T Peering policy
CenturyLink (formerlyQwest & Savvis)[12]United States2091,776550,000 miles [13]North America;International
Cogent Communications(formerly PSINet)[14]United States1744,95384,400 miles[15]Cogent Peering Policy Note: Cogent does not provide IPv6 connectivity to Google"Cogent - Google - HE Fun". 2016-03-09.
Deutsche Telekom AG (ICSS)[16]Germany3320573DTAG Peering Details
Global Telecom & Technology (GTT)(formerly Tinet & nLayer)[17]United States -Italy3257 / 44361,391GTT Peering Policy
KPN International[18]Netherlands286240KPN Peering Policy
Level 3 Communications(formerly Level 3 andGlobal Crossing)[19][20]United States3356 / 3549 / 14,664200,000 miles[21]Level 3 Peering Policy
NTT Communications (America) (formerlyVerio)[22]Japan29141,352North America
Orange (OpenTransit)[23]France5511173OTI peering policy
Sprint[24]United States1239582Peering policy
Tata Communications (America) (AcquiredTeleglobe)[25]India6453719700,000 km[26]Peering Policy
Telecom Italia Sparkle(Seabone)[27]Italy6762534Peering Policy
Telefonica Global Solutions[28]Spain12956265Telefonica Peering Policy
Telia Carrier[29]Sweden12991,280TeliaSonera International Carrier Global Peering Policy
Verizon Enterprise Solutions (formerlyUUNET)[30][31][32]United States701 / 702 / 7031,311500,000 miles[33]Verizon UUNET Peering policy 701, 702, 703
XO Communications[34]United States28281,13333,000 miles[35]XO Peering Policy
Zayo Group (formerlyAboveNet)[36]United States64611,583112,600 miles[37]Zayo Peering Policy

Other major networks[edit]

Below is a list of some of these tier 2 networks which are often listed as tier 1, along with their upstream providers:[citation needed]
NameHeadquartersAS NumberJune 2016degree[8][9]Buy transit from
Hurricane ElectricUnited States69394,809IPv4: Telia Carrier/AS1299, Verizon Enterprise Solutions (formerly UUNET)/AS701[39]
IPv6: No transit provider, segmented from Cogent Communications (AS174) IPv6 Network[40]
PCCW GlobalHong Kong3491547Level 3 Communications/AS3356, Global Telecom & Technology (GTT)/AS4436[41]
Vodafone (formerly Cable & Wireless Worldwide)United Kingdom1273296Level 3 Communications/AS3356, Telia Carrier/AS1299, Verizon Enterprise Solutions(formerly UUNET)/AS701, Global Telecom & Technology (GTT)/AS4436[42]

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