Observed topology
AS11164 INTERNET2-I2PX
Transit
Upstream networks
Networks observed carrying traffic for AS11164: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.
| AS | Network | Type | Families | Paths seen |
|---|---|---|---|---|
| AS6939 | Hurricane Electric LLC | Transit | IPv4 IPv6 | 183 |
| AS3303 | Swisscom (Schweiz) AG | Residential | IPv4 IPv6 | 21 |
| AS3491 | PCCW Global (HK) Ltd. | Transit | IPv4 IPv6 | 20 |
| AS14907 | Wikimedia Foundation Inc. | Hosting | IPv4 IPv6 | 14 |
| AS852 | TELUS Communications Inc. | Residential | IPv4 IPv6 | 14 |
| AS2497 | Internet Initiative Japan Inc. | Unclassified | IPv4 | 11 |
| AS4637 | Telstra Global | Unclassified | IPv4 | 4 |
| AS2152 | CENIC | Unclassified | IPv4 | 4 |
Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you.
Transit
Downstream networks
Networks for which AS11164 was observed as the last hop before the origin, meaning it appears to provide them transit.
| AS | Network | Type | Families | Paths seen |
|---|---|---|---|---|
| AS6327 | Shaw Communications | Residential | IPv4 | 3,706 |
| AS6079 | RCN | Residential | IPv4 | 2,222 |
| AS20940 | Akamai International B.V. | Hosting | IPv4 | 1,474 |
| AS5650 | Frontier Communications of America, Inc. | Residential | IPv4 | 1,023 |
| AS812 | Rogers Communications Canada Inc. | Mobile | IPv4 | 1,012 |
| AS4134 | No.31,Jin-rong Street | Residential | IPv4 | 670 |
| AS852 | TELUS Communications Inc. | Residential | IPv4 | 665 |
| AS4637 | Telstra Global | Unclassified | IPv4 | 644 |
| AS20473 | The Constant Company, LLC | Hosting | IPv4 | 604 |
| AS23473 | PAVLOV MEDIA INC | Unclassified | IPv4 | 598 |
| AS31898 | Oracle Corporation | Hosting | IPv4 | 598 |
| AS2152 | CENIC | Unclassified | IPv4 | 528 |
| AS19551 | Incapsula Inc | Hosting | IPv4 | 496 |
| AS3491 | PCCW Global (HK) Ltd. | Transit | IPv4 | 486 |
| AS16509 | Amazon.com, Inc. | Hosting | IPv4 | 438 |
| AS3807 | University of Montana | Education | IPv4 IPv6 | 341 |
| AS14061 | DigitalOcean, LLC | Hosting | IPv4 | 290 |
| AS81 | MCNC | Unclassified | IPv4 IPv6 | 278 |
| AS22742 | Connecticut Education Network | Unclassified | IPv4 | 245 |
| AS3303 | Swisscom (Schweiz) AG | Residential | IPv4 | 242 |
| AS5769 | Videotron Ltee | Residential | IPv4 | 240 |
| AS396961 | Internet2 | Unclassified | IPv4 IPv6 | 204 |
| AS2497 | Internet Initiative Japan Inc. | Unclassified | IPv4 | 196 |
| AS210 | Utah Education Network | Unclassified | IPv4 | 169 |
| AS13335 | Cloudflare, Inc. | Hosting | IPv4 | 166 |
| AS4648 | Global-Gateway Internet | Unclassified | IPv4 | 165 |
| AS8781 | Ooredoo Q.S.C. | Residential | IPv4 | 149 |
| AS396955 | Internet2 | Unclassified | IPv4 IPv6 | 149 |
| AS14593 | Space Exploration Technologies Corporation | Residential | IPv4 | 148 |
| AS160 | The University of Chicago | Education | IPv4 IPv6 | 135 |
| AS21859 | Zenlayer Inc | Hosting | IPv4 | 122 |
| AS5078 | Oklahoma Network for Education Enrichment and | Education | IPv4 | 120 |
| AS40581 | Arkansas Research and Education Optical Network | Education | IPv4 IPv6 | 100 |
| AS62775 | Internet2 | Unclassified | IPv4 IPv6 | 100 |
| AS237 | Merit Network Inc. | Unclassified | IPv4 IPv6 | 94 |
| AS55 | University of Pennsylvania | Unclassified | IPv4 IPv6 | 93 |
| AS14361 | HopOne Internet Corporation | Hosting | IPv4 | 92 |
| AS14085 | LEARN | Unclassified | IPv4 IPv6 | 90 |
| AS25829 | Smithsonian Institution | Unclassified | IPv4 | 89 |
| AS40220 | Virginia Polytechnic Institute and State Univ. | Unclassified | IPv4 IPv6 | 89 |
| AS36236 | NetActuate, Inc | Hosting | IPv4 | 85 |
| AS5400 | British Telecommunications Limited | Unclassified | IPv4 | 85 |
| AS1968 | UMASSNET | Unclassified | IPv4 IPv6 | 83 |
| AS4181 | TDS TELECOM | Residential | IPv4 | 81 |
| AS4788 | TM TECHNOLOGY SERVICES SDN. BHD. | Mobile | IPv4 | 78 |
| AS32440 | Louisiana Board of Regents/Louisiana Optical Network Initiative (LONI) | Unclassified | IPv4 | 78 |
| AS2572 | University of Missouri - dba the Missouri Research and Education Network (MOREnet) | Education | IPv4 IPv6 | 78 |
| AS63949 | Akamai Connected Cloud | Hosting | IPv4 | 76 |
| AS2381 | WiscNet | Unclassified | IPv4 | 74 |
| AS600 | OARnet | Unclassified | IPv4 | 74 |
| AS11096 | FloridaNet | Education | IPv4 IPv6 | 73 |
| AS15169 | Google LLC | Hosting | IPv4 | 72 |
| AS5050 | Pittsburgh Supercomputing Center | Education | IPv4 | 72 |
| AS3701 | University of Oregon | Education | IPv4 | 70 |
| AS3 | Massachusetts Institute of Technology | Education | IPv4 IPv6 | 70 |
| AS2721 | CULR, LLC | Unclassified | IPv4 IPv6 | 70 |
| AS6360 | University of Hawaii | Education | IPv4 | 69 |
| AS393689 | National Library of Medicine | Unclassified | IPv4 IPv6 | 63 |
| AS3128 | University of Wisconsin System | Education | IPv4 | 60 |
| AS1742 | Harvard University | Unclassified | IPv4 IPv6 | 60 |
| AS35280 | F5 Networks SARL | Hosting | IPv4 | 56 |
| AS109 | CISCO SYSTEMS, INC. | Unclassified | IPv4 | 48 |
| AS36692 | Cisco OpenDNS, LLC | Hosting | IPv4 | 47 |
| AS199524 | G-Core Labs S.A. | Hosting | IPv4 | 46 |
| AS54825 | Packet Host, Inc. | Hosting | IPv4 | 44 |
| AS14325 | OSHEAN, Inc. | Unclassified | IPv4 | 42 |
| AS42 | WoodyNet, Inc. | Unclassified | IPv4 | 42 |
| AS55256 | Netskope Inc | Hosting | IPv4 | 42 |
| AS10466 | MAGPI | Education | IPv4 IPv6 | 42 |
| AS25969 | St. Louis University | Unclassified | IPv4 | 39 |
| AS62887 | WhiteSky Communications, LLC. | Residential | IPv4 | 39 |
| AS13326 | Tufts University | Unclassified | IPv4 IPv6 | 39 |
| AS14340 | Salesforce.com, Inc. | Hosting | IPv4 | 38 |
| AS46832 | University of Missouri - dba the Missouri Research and Education Network (MOREnet) | Unclassified | IPv4 | 38 |
| AS111 | Boston University | Education | IPv4 IPv6 | 38 |
| AS22645 | LEARN | Unclassified | IPv4 | 37 |
| AS19151 | BroadbandONE, LLC | Hosting | IPv4 | 34 |
| AS46435 | IRON | Unclassified | IPv4 IPv6 | 34 |
| AS401950 | IPNSIG INC. | Unclassified | IPv4 IPv6 | 34 |
| AS9505 | Taiwan Internet Gateway | Unclassified | IPv4 | 33 |
| AS10578 | Harvard University | Education | IPv4 IPv6 | 31 |
| AS33189 | South Dakota Board of Regents | Unclassified | IPv4 | 30 |
| AS11745 | University System of New Hampshire | Education | IPv4 IPv6 | 30 |
| AS46 | Rutgers, The State University | Education | IPv4 | 29 |
| AS7896 | The Board of Regents of the University of Nebraska | Education | IPv4 | 28 |
| AS62600 | Arizona Board of Regents | Unclassified | IPv4 | 27 |
| AS32934 | Facebook, Inc. | Hosting | IPv4 | 26 |
| AS29748 | Quality Technology Services, LLC | Hosting | IPv4 | 25 |
| AS10326 | Worcester Polytechnic Institute | Education | IPv4 IPv6 | 25 |
| AS22773 | Cox Communications Inc. | Residential | IPv4 | 24 |
| AS14041 | University Corporation for Atmospheric Research | Education | IPv4 | 21 |
| AS2906 | Netflix Streaming Services Inc. | Hosting | IPv4 | 21 |
| AS11232 | Midcontinent Communications | Residential | IPv4 | 21 |
| AS101 | University of Washington | Unclassified | IPv4 IPv6 | 21 |
| AS231 | Michigan State University | Unclassified | IPv4 IPv6 | 20 |
| AS22335 | Metropolitan Research and Education Network | Unclassified | IPv4 | 18 |
| AS13150 | CATO NETWORKS LTD | Unclassified | IPv4 | 17 |
| AS394088 | Agriculture Research Service | Unclassified | IPv4 | 15 |
| AS13445 | Cisco Webex LLC | Hosting | IPv4 | 14 |
| AS3676 | University of Iowa | Education | IPv4 | 12 |
| AS2495 | Kansas Research and Education Network | Unclassified | IPv4 | 12 |
| AS57 | University of Minnesota | Unclassified | IPv4 | 12 |
| AS714 | Apple Inc. | Hosting | IPv4 | 11 |
| AS3851 | Nevada System of Higher Education | Education | IPv4 | 11 |
| AS33353 | Sony Interactive Entertainment LLC | Hosting | IPv4 | 10 |
| AS396986 | Bytedance Inc. | Hosting | IPv4 | 9 |
| AS10310 | Yahoo Holdings Inc. | Hosting | IPv4 | 9 |
| AS40401 | Backblaze Inc | Hosting | IPv4 | 9 |
| AS29917 | University System of New Hampshire | Unclassified | IPv4 | 9 |
| AS4901 | The George Washington University | Education | IPv4 | 9 |
| AS19782 | Indiana University | Unclassified | IPv4 | 8 |
| AS401602 | Keystone REN, LLC | Unclassified | IPv4 | 8 |
| AS2698 | Iowa State University of Science and Technology | Education | IPv4 | 8 |
| AS10886 | University of Maryland | Education | IPv4 | 8 |
| AS399855 | Keystone REN, LLC | Unclassified | IPv4 | 7 |
| AS7342 | VeriSign Infrastructure & Operations | Unclassified | IPv4 | 7 |
| AS19679 | Dropbox, Inc. | Hosting | IPv4 | 6 |
| AS17378 | TierPoint, LLC | Hosting | IPv4 | 6 |
| AS103 | Northwestern University | Unclassified | IPv4 | 6 |
| AS33425 | CoreWeave, Inc | Unclassified | IPv4 | 6 |
| AS57976 | Blizzard Entertainment, Inc | Hosting | IPv4 | 6 |
| AS557 | University of Maine System | Unclassified | IPv4 | 5 |
Adjacency
Adjacent networks
Every AS seen directly next to AS11164 in a routing path, in either direction.
| AS | Network | Type | Families | Paths seen |
|---|---|---|---|---|
| AS2152 | CENIC | Unclassified | IPv4 IPv6 | 165,593 |
| AS3491 | PCCW Global (HK) Ltd. | Transit | IPv4 IPv6 | 85,698 |
| AS4637 | Telstra Global | Unclassified | IPv4 | 21,220 |
| AS4134 | No.31,Jin-rong Street | Residential | IPv4 | 20,974 |
| AS2497 | Internet Initiative Japan Inc. | Unclassified | IPv4 | 5,725 |
| AS852 | TELUS Communications Inc. | Residential | IPv4 IPv6 | 5,397 |
| AS14907 | Wikimedia Foundation Inc. | Hosting | IPv4 IPv6 | 5,315 |
| AS6327 | Shaw Communications | Residential | IPv4 | 4,877 |
| AS6939 | Hurricane Electric LLC | Transit | IPv4 IPv6 | 4,665 |
| AS3303 | Swisscom (Schweiz) AG | Residential | IPv4 IPv6 | 4,619 |
| AS20940 | Akamai International B.V. | Hosting | IPv4 | 2,653 |
| AS6079 | RCN | Residential | IPv4 | 2,431 |
| AS4788 | TM TECHNOLOGY SERVICES SDN. BHD. | Mobile | IPv4 | 2,405 |
| AS5650 | Frontier Communications of America, Inc. | Residential | IPv4 | 1,477 |
| AS35280 | F5 Networks SARL | Hosting | IPv4 | 1,473 |
| AS10886 | University of Maryland | Education | IPv4 IPv6 | 1,456 |
| AS5400 | British Telecommunications Limited | Unclassified | IPv4 | 1,245 |
| AS19551 | Incapsula Inc | Hosting | IPv4 | 1,043 |
| AS812 | Rogers Communications Canada Inc. | Mobile | IPv4 | 1,031 |
| AS20473 | The Constant Company, LLC | Hosting | IPv4 | 1,024 |
| AS4648 | Global-Gateway Internet | Unclassified | IPv4 | 1,022 |
| AS40220 | Virginia Polytechnic Institute and State Univ. | Unclassified | IPv4 IPv6 | 897 |
| AS9680 | HiNet Service Center in U.S.A | Residential | IPv4 | 808 |
| AS32440 | Louisiana Board of Regents/Louisiana Optical Network Initiative (LONI) | Unclassified | IPv4 IPv6 | 718 |
| AS81 | MCNC | Unclassified | IPv4 IPv6 | 642 |
| AS31898 | Oracle Corporation | Hosting | IPv4 | 637 |
| AS101 | University of Washington | Unclassified | IPv4 IPv6 | 615 |
| AS21859 | Zenlayer Inc | Hosting | IPv4 | 599 |
| AS23473 | PAVLOV MEDIA INC | Unclassified | IPv4 | 598 |
| AS36236 | NetActuate, Inc | Hosting | IPv4 | 577 |
| AS22742 | Connecticut Education Network | Unclassified | IPv4 | 568 |
| AS22335 | Metropolitan Research and Education Network | Unclassified | IPv4 IPv6 | 504 |
| AS14041 | University Corporation for Atmospheric Research | Education | IPv4 IPv6 | 501 |
| AS19782 | Indiana University | Unclassified | IPv4 | 492 |
| AS16509 | Amazon.com, Inc. | Hosting | IPv4 | 457 |
| AS11096 | FloridaNet | Education | IPv4 | 442 |
| AS399855 | Keystone REN, LLC | Unclassified | IPv4 IPv6 | 417 |
| AS2381 | WiscNet | Unclassified | IPv4 | 407 |
| AS8781 | Ooredoo Q.S.C. | Residential | IPv4 | 354 |
| AS237 | Merit Network Inc. | Unclassified | IPv4 IPv6 | 346 |
| AS19151 | BroadbandONE, LLC | Hosting | IPv4 | 342 |
| AS210 | Utah Education Network | Unclassified | IPv4 | 339 |
| AS5769 | Videotron Ltee | Residential | IPv4 | 339 |
| AS62600 | Arizona Board of Regents | Unclassified | IPv4 | 338 |
| AS3701 | University of Oregon | Education | IPv4 IPv6 | 338 |
| AS3807 | University of Montana | Education | IPv4 | 323 |
| AS14061 | DigitalOcean, LLC | Hosting | IPv4 | 323 |
| AS10490 | Georgia Institute of Technology | Education | IPv4 | 317 |
| AS600 | OARnet | Unclassified | IPv4 IPv6 | 306 |
| AS62532 | NJEDge.Net, Inc. | Unclassified | IPv4 IPv6 | 292 |
| AS40581 | Arkansas Research and Education Optical Network | Education | IPv4 IPv6 | 259 |
| AS5078 | Oklahoma Network for Education Enrichment and | Education | IPv4 | 258 |
| AS9505 | Taiwan Internet Gateway | Unclassified | IPv4 | 239 |
| AS10578 | Harvard University | Education | IPv4 IPv6 | 236 |
| AS7575 | Australian Academic and Research Network (AARNet) | Education | IPv4 | 232 |
| AS2721 | CULR, LLC | Unclassified | IPv4 IPv6 | 218 |
| AS1968 | UMASSNET | Unclassified | IPv4 | 216 |
| AS396926 | C Spire Fiber | Unclassified | IPv4 | 204 |
| AS396961 | Internet2 | Unclassified | IPv4 IPv6 | 204 |
| AS57 | University of Minnesota | Unclassified | IPv4 | 194 |
| AS13335 | Cloudflare, Inc. | Hosting | IPv4 | 166 |
| AS5050 | Pittsburgh Supercomputing Center | Education | IPv4 | 160 |
| AS14593 | Space Exploration Technologies Corporation | Residential | IPv4 | 157 |
| AS199524 | G-Core Labs S.A. | Hosting | IPv4 | 154 |
| AS46832 | University of Missouri - dba the Missouri Research and Education Network (MOREnet) | Unclassified | IPv4 | 154 |
| AS3128 | University of Wisconsin System | Education | IPv4 | 151 |
| AS396955 | Internet2 | Unclassified | IPv4 IPv6 | 149 |
| AS4181 | TDS TELECOM | Residential | IPv4 | 145 |
| AS22645 | LEARN | Unclassified | IPv4 | 138 |
| AS2495 | Kansas Research and Education Network | Unclassified | IPv4 | 138 |
| AS33189 | South Dakota Board of Regents | Unclassified | IPv4 | 138 |
| AS160 | The University of Chicago | Education | IPv4 IPv6 | 135 |
| AS2572 | University of Missouri - dba the Missouri Research and Education Network (MOREnet) | Education | IPv4 | 130 |
| AS14325 | OSHEAN, Inc. | Unclassified | IPv4 | 119 |
| AS55 | University of Pennsylvania | Unclassified | IPv4 | 116 |
| AS1742 | Harvard University | Unclassified | IPv4 | 111 |
| AS25829 | Smithsonian Institution | Unclassified | IPv4 | 104 |
| AS6360 | University of Hawaii | Education | IPv4 | 101 |
| AS62775 | Internet2 | Unclassified | IPv4 IPv6 | 100 |
| AS62887 | WhiteSky Communications, LLC. | Residential | IPv4 | 94 |
| AS14361 | HopOne Internet Corporation | Hosting | IPv4 | 92 |
| AS46435 | IRON | Unclassified | IPv4 IPv6 | 92 |
| AS10437 | Kentucky Regional Optical Network (KY-RON) | Unclassified | IPv4 | 91 |
| AS14085 | LEARN | Unclassified | IPv4 IPv6 | 90 |
| AS9318 | SK Broadband Co Ltd | Unclassified | IPv4 | 87 |
| AS1828 | Unitas Global | Unclassified | IPv4 | 77 |
| AS36412 | Drexel University | Unclassified | IPv4 | 76 |
| AS63949 | Akamai Connected Cloud | Hosting | IPv4 | 76 |
| AS15169 | Google LLC | Hosting | IPv4 | 74 |
| AS2698 | Iowa State University of Science and Technology | Education | IPv4 | 71 |
| AS10310 | Yahoo Holdings Inc. | Hosting | IPv4 | 67 |
| AS42 | WoodyNet, Inc. | Unclassified | IPv4 | 64 |
| AS3 | Massachusetts Institute of Technology | Education | IPv4 | 64 |
| AS10466 | MAGPI | Education | IPv4 IPv6 | 60 |
| AS22773 | Cox Communications Inc. | Residential | IPv4 | 57 |
| AS54825 | Packet Host, Inc. | Hosting | IPv4 | 50 |
| AS57695 | Misaka Network, Inc. | Unclassified | IPv4 | 50 |
| AS7896 | The Board of Regents of the University of Nebraska | Education | IPv4 | 48 |
| AS109 | CISCO SYSTEMS, INC. | Unclassified | IPv4 | 48 |
| AS393689 | National Library of Medicine | Unclassified | IPv4 | 48 |
| AS14340 | Salesforce.com, Inc. | Hosting | IPv4 | 47 |
| AS36692 | Cisco OpenDNS, LLC | Hosting | IPv4 | 47 |
| AS55256 | Netskope Inc | Hosting | IPv4 | 42 |
| AS401602 | Keystone REN, LLC | Unclassified | IPv4 | 40 |
| AS25969 | St. Louis University | Unclassified | IPv4 | 39 |
| AS40387 | University of Illinois | Unclassified | IPv4 | 39 |
| AS111 | Boston University | Education | IPv4 | 32 |
| AS557 | University of Maine System | Unclassified | IPv4 | 30 |
| AS29748 | Quality Technology Services, LLC | Hosting | IPv4 | 29 |
| AS46 | Rutgers, The State University | Education | IPv4 | 29 |
| AS2906 | Netflix Streaming Services Inc. | Hosting | IPv4 | 29 |
| AS32934 | Facebook, Inc. | Hosting | IPv4 | 26 |
| AS11745 | University System of New Hampshire | Education | IPv4 | 26 |
| AS7342 | VeriSign Infrastructure & Operations | Unclassified | IPv4 | 26 |
| AS13326 | Tufts University | Unclassified | IPv6 | 24 |
| AS10326 | Worcester Polytechnic Institute | Education | IPv4 | 24 |
Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.
Interconnection
Exchange presence
Internet exchanges where Packet Clearing House has a port recorded for AS11164, largest fabric first. An exchange is shared switching where networks interconnect directly rather than paying a transit provider to carry traffic between them, so turning up at one is a deliberate choice about how this network wants to be reached. Each name opens that exchange's own page, with its peering LANs and every other network recorded on it. Recorded at 15 exchanges across 1 country and 1 region.
| Exchange | Location | Their address | Member ports |
|---|---|---|---|
| Equinix Internet Exchange Ashburn | Ashburn, United States | 206.126.236.45 | 388 |
| Seattle Internet Exchange | Seattle, United States | 206.81.80.77 | 350 |
| Coresite - Any2 West | Los Angeles, United States | 206.72.210.14 | 344 |
| Any2 California | Los Angeles, United States | 206.72.210.14 | 321 |
| Equinix Internet Exchange Chicago | Chicago, United States | 208.115.136.116 | 280 |
| DE-CIX New York | New York, United States | 206.82.104.148 | 279 |
| Equinix Internet Exchange Dallas | Dallas, United States | 206.223.118.32 | 225 |
| New York International Internet Exchange | New York, United States | 2001:504:1::a501:1164:1 | 217 |
| Equinix Internet Exchange San Jose (Bay Area) | San Jose, United States | 206.223.117.192 | 193 |
| Equinix Internet Exchange New York | New York, United States | 2001:504:f::9d | 98 |
| Equinix Internet Exchange Los Angeles | Los Angeles, United States | 206.223.123.199 | 81 |
| Equinix Internet Exchange Palo Alto | Palo Alto, United States | 198.32.176.128 | 76 |
| Digital Realty New York Internet Exchange | New York, United States | 206.126.115.235 | 75 |
| Equinix Los Angeles IBX | Los Angeles, United States | 206.223.123.199 | 72 |
| Equinix IBX Secaucus retired | Secaucus, United States | 206.223.117.192 | 64 |
Unlike the tables above, this is recorded rather than inferred. An address on a peering LAN is at that exchange by definition. Two carve-outs all the same. Member ports counts every participant at the exchange, not this network's ports, so read it as a size proxy. And an absent exchange means PCH has no record of it, not that the network is not there.
Provenance
Where this comes from
Derived from routing tables collected at 2026-08-08 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 74.02M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.
Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.
Exchange presence comes from a separate dataset: the directory collected 2026-08-08 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,327 exchanges and 93,137 recorded member ports, licensed CC BY-NC-SA 3.0.
PeeringDB is the better-known directory and is deliberately not the source here: its acceptable-use policy forbids the bulk storage this needs. The two answer different questions anyway. PeeringDB reports what an operator declares about itself; this reports what PCH has recorded.