asn.dev

Observed topology

AS40220 MARIA

Upstreams 5 carry this network
Downstreams 12 this network carries
Adjacent (IPv4) 23
Adjacent (IPv6) 9

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS40220: 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.

ASNetworkTypeFamiliesPaths seen
AS174Cogent Communications, LLCTransitIPv4 IPv6168
AS11164Internet2EducationIPv4 IPv689
AS6939Hurricane Electric LLCTransitIPv634
AS11537Internet2UnclassifiedIPv4 IPv616
AS24482SG.GSHostingIPv61

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

inferred

Networks for which AS40220 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS1201Old Dominion UniversityUnclassifiedIPv41,154
AS225University of VirginiaUnclassifiedIPv4314
AS26499Virginia Polytechnic Institute and State Univ.UnclassifiedIPv4 IPv6290
AS1312Virginia Polytechnic Institute and State Univ.UnclassifiedIPv4 IPv6223
AS11279George Mason UniversityEducationIPv4 IPv6222
AS1411Christopher Newport UniversityUnclassifiedIPv4189
AS11975The College of William and MaryEducationIPv4151
AS3140The Thomas Jefferson High School for Science and Tech.EducationIPv4 IPv696
AS16643Virginia Commonwealth UniversityUnclassifiedIPv444
AS53446EVMSUnclassifiedIPv410
AS10357James Madison UniversityEducationIPv48
AS4922Shenandoah Cable Television LLCResidentialIPv48

Adjacency

Adjacent networks

32 shown

Every AS seen directly next to AS40220 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1201Old Dominion UniversityUnclassifiedIPv41,154
AS11164Internet2EducationIPv4 IPv6897
AS174Cogent Communications, LLCTransitIPv4 IPv6881
AS11537Internet2UnclassifiedIPv4 IPv6520
AS6939Hurricane Electric LLCTransitIPv4 IPv6344
AS225University of VirginiaUnclassifiedIPv4314
AS10490Georgia Institute of TechnologyEducationIPv4294
AS26499Virginia Polytechnic Institute and State Univ.UnclassifiedIPv4 IPv6290
AS1312Virginia Polytechnic Institute and State Univ.UnclassifiedIPv4 IPv6237
AS11279George Mason UniversityEducationIPv4 IPv6222
AS1411Christopher Newport UniversityUnclassifiedIPv4189
AS11975The College of William and MaryEducationIPv4151
AS3140The Thomas Jefferson High School for Science and Tech.EducationIPv4 IPv696
AS24482SG.GSHostingIPv4 IPv659
AS37721Virtual Technologies & SolutionsResidentialIPv450
AS16643Virginia Commonwealth UniversityUnclassifiedIPv444
AS40151Old Dominion UniversityUnclassifiedIPv421
AS53446EVMSUnclassifiedIPv410
AS10357James Madison UniversityEducationIPv48
AS4922Shenandoah Cable Television LLCResidentialIPv48
AS293ESnetUnclassifiedIPv43
AS35280F5 Networks SARLHostingIPv42
AS5405Inter.link GmbHUnclassifiedIPv42

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

recorded

Internet exchanges where Packet Clearing House has a port recorded for AS40220, 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 2 exchanges across 1 country and 1 region.

ExchangeLocationTheir addressMember ports
Equinix Internet Exchange AshburnAshburn, United States206.126.236.139388
Digital Realty Atlanta Internet ExchangeAtlanta, United States206.126.110.182175

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 2026-08-09 by Packet Clearing House (https://www.pch.net/ixp/data), covering 1,327 exchanges and 93,164 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.