AS11164 — INTERNET2-I2PX

Network type: education

AS11164 announces 8 IPv4 prefixes covering 2,304 addresses and 7 IPv6 prefixes.

About this network

INTERNET2-I2PX is the peering AS of Internet2, the US national research-and-education backbone. I2PX (the Internet2 Peer Exchange, the successor to what was long called TransitRail/CPS) is the AS Internet2 uses to hold commercial peering sessions with content and cloud providers and hand those routes on to its member universities, labs and regional networks.

What it's used for

Backbone plumbing and route exchange, not end-user address space. RIS sees 7 IPv4 prefixes / 2,048 addresses and 7 IPv6 prefixes, against 95 observed neighbours. That ratio is the whole story: a network with only a couple of thousand addresses that nonetheless talks BGP with ~95 other autonomous systems is doing exchange work, not serving customers on those addresses. The addresses themselves are router infrastructure.

Notable

The reverse DNS confirms it directly. Sampled PTRs land on names like lo-7.core1.ashb.net.internet2.edu, core1.seat, core1.losa and core2.newy32aoa — loopbacks and core-router interfaces in Ashburn, Seattle, Los Angeles and 32 Avenue of the Americas in New York, all under Internet2's own domain. Every announced prefix is registered to Internet2 (INTERNET2, I2-NEWNET), so holder, registrant and rDNS all agree.

Interesting

Internet2's main backbone rides a different AS number; this one exists so that commercial peering can be kept on a separate policy boundary from R&E transit, which is why the address footprint is tiny and the neighbour count is not.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 64.57.20.0/23
• 64.57.29.0/24
• 163.253.18.0/24
• 163.253.76.0/24
• 163.253.78.0/24
• 163.253.81.0/24
• 163.253.82.0/24
• 198.71.47.0/24
• 2001:468:2f06::/48
• 2001:468:2f08::/48
• 2001:468:2f0b::/48
• 2001:468:2f0c::/48
• 2001:468:f000::/48
• 2001:468:f001:4::/126
• 2001:468:f0ff::/48

Upstream networks

• AS6939 Hurricane Electric LLC
• AS3491 PCCW Global HK Ltd.
• AS6461 Zayo Bandwidth
• AS3303 Swisscom (Schweiz) AG
• AS14907 Wikimedia Foundation Inc.
• AS852 Communications
• AS2497 Internet Initiative Japan Inc.
• AS4637 Telstra Global
• AS2152 CENIC

Downstream networks

• AS6327 Shaw Communications
• AS6079 RCN
• AS20940 Akamai International B.V.
• AS5650 Frontier Communications of America, Inc.
• AS812 Rogers Communications Canada Inc.
• AS31898 Oracle Corporation
• AS852 Communications
• AS4134 No.31,Jin-rong Street
• AS2152 CENIC
• AS4637 Telstra Global
• AS23473 PAVLOV MEDIA INC
• AS20473 The Constant Company, LLC
• AS3491 PCCW Global HK Ltd.
• AS19551 Incapsula Inc
• AS16509 Amazon.com, Inc.
• AS22742 Connecticut Education Network
• AS3807 University of Montana
• AS14061 DigitalOcean, LLC
• AS2497 Internet Initiative Japan Inc.
• AS5769 Videotron Ltee
• AS3303 Swisscom (Schweiz) AG
• AS81 MCNC
• AS396961 Internet2
• AS237 Merit Network Inc.
• AS4648 Global-Gateway Internet

Adjacent networks

• AS2152 CENIC
• AS3491 PCCW Global HK Ltd.
• AS4637 Telstra Global
• AS4134 No.31,Jin-rong Street
• AS2497 Internet Initiative Japan Inc.
• AS852 Communications
• AS14907 Wikimedia Foundation Inc.
• AS6327 Shaw Communications
• AS3303 Swisscom (Schweiz) AG
• AS6939 Hurricane Electric LLC
• AS6079 RCN
• AS4788 TM TECHNOLOGY SERVICES SDN. BHD.
• AS20940 Akamai International B.V.
• AS35280 F5 Networks SARL
• AS5650 Frontier Communications of America, Inc.
• AS6461 Zayo Bandwidth
• AS5400 British Telecommunications Limited
• AS10886 University of Maryland
• AS19551 Incapsula Inc
• AS40220 Virginia Polytechnic Institute and State Univ.
• AS20473 The Constant Company, LLC
• AS812 Rogers Communications Canada Inc.
• AS4648 Global-Gateway Internet
• AS9680 HiNet Service Center in U.S.A
• AS22742 Connecticut Education Network

Routing security

• RPKI: 26 valid, 0 invalid and 0 not-found announcements; 38 ROAs.
• ASPA: none published.
• IRR: 81% of announcements registered; 27 route objects.
• Listed in as-sets: AS-396926-AS-MISSION-P, AS-ANY2-RS, AS-NORDUNET, AS-PEERS, AS-RCN-CE-PEERS, AS-RIS-RRC11, AS-RIS-RRC14, AS10886:AS-CPS-PROV, AS11164:AS-ALL, AS11164:AS-PARTICIPANTS, AS11537:AS-INTERNAL, AS198949:AS-SD, AS23864:AS-COM-IX-ROUTE-SERVER, AS3303:AS-SWCMPEERS, AS3676:AS-UIOWA-PEERS-ANNOUNCE-CUST, AS396955:AS-TRANSIT, AS396955:AS-TRANSIT-ARELION, AS63034:AS-DECIX-NYC-CONNECTED, AS63034:AS-DECIX-NYC-RS, AS63034:AS-DECIX-NYC-RS-V6, AS8218:AS-PEERS.

Internet exchanges

• Equinix Internet Exchange Ashburn — Ashburn, United States
• Seattle Internet Exchange — Seattle, United States
• Coresite - Any2 West — Los Angeles, United States
• Any2 California — Los Angeles, United States
• DE-CIX New York — New York, United States
• Equinix Internet Exchange Chicago — Chicago, United States
• Equinix Internet Exchange Dallas — Dallas, United States
• New York International Internet Exchange — New York, United States
• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States
• Equinix Internet Exchange New York — New York, United States
• Equinix Internet Exchange Los Angeles — Los Angeles, United States
• Equinix Internet Exchange Palo Alto — Palo Alto, United States
• Equinix Los Angeles IBX — Los Angeles, United States
• Equinix IBX Secaucus — Secaucus, United States