asn.dev

Observed topology

AS27065 DNIC-ASBLK-27032-27159

Upstreams 2 carry this network
Downstreams 20 this network carries
Adjacent (IPv4) 23
Adjacent (IPv6) 5

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS27065: 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
AS721United States Department of Defense (DoD)UnclassifiedIPv4 IPv63,183
AS27064United States Department of Defense (DoD)UnclassifiedIPv4344

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 AS27065 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS367United States Department of Defense (DoD)UnclassifiedIPv4 IPv629,822
AS5972United States Department of Defense (DoD)UnclassifiedIPv44,680
AS5839United States Department of Defense (DoD)UnclassifiedIPv43,840
AS56United States Department of Defense (DoD)UnclassifiedIPv42,122
AS637United States Department of Defense (DoD)UnclassifiedIPv42,000
AS27046United States Department of Defense (DoD)UnclassifiedIPv41,441
AS1733United States Department of Defense (DoD)UnclassifiedIPv4 IPv6707
AS27139United States Department of Defense (DoD)UnclassifiedIPv4664
AS6035United States Department of Defense (DoD)UnclassifiedIPv4480
AS5927United States Department of Defense (DoD)UnclassifiedIPv4 IPv6242
AS2633National Academy of SciencesEducationIPv4122
AS6025United States Department of Defense (DoD)UnclassifiedIPv668
AS149United States Department of Defense (DoD)UnclassifiedIPv461
AS321United States Department of Defense (DoD)UnclassifiedIPv461
AS656United States Department of Defense (DoD)UnclassifiedIPv460
AS126United States Department of Defense (DoD)UnclassifiedIPv460
AS5052United States Department of Defense (DoD)UnclassifiedIPv460
AS463Air Force Systems NetworkingUnclassifiedIPv460
AS1553United States Department of Defense (DoD)UnclassifiedIPv460
AS467Air Force Systems NetworkingUnclassifiedIPv460

Adjacency

Adjacent networks

29 shown

Every AS seen directly next to AS27065 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS721United States Department of Defense (DoD)UnclassifiedIPv4 IPv668,672
AS367United States Department of Defense (DoD)UnclassifiedIPv4 IPv643,752
AS1733United States Department of Defense (DoD)UnclassifiedIPv4 IPv67,420
AS5972United States Department of Defense (DoD)UnclassifiedIPv44,680
AS27064United States Department of Defense (DoD)UnclassifiedIPv44,008
AS5839United States Department of Defense (DoD)UnclassifiedIPv43,840
AS56United States Department of Defense (DoD)UnclassifiedIPv42,122
AS637United States Department of Defense (DoD)UnclassifiedIPv42,000
AS27046United States Department of Defense (DoD)UnclassifiedIPv41,441
AS5231United States Department of Defense (DoD)UnclassifiedIPv41,219
AS27139United States Department of Defense (DoD)UnclassifiedIPv41,209
AS6035United States Department of Defense (DoD)UnclassifiedIPv4480
AS5927United States Department of Defense (DoD)UnclassifiedIPv4 IPv6242
AS2633National Academy of SciencesEducationIPv4122
AS6025United States Department of Defense (DoD)UnclassifiedIPv668
AS321United States Department of Defense (DoD)UnclassifiedIPv461
AS149United States Department of Defense (DoD)UnclassifiedIPv461
AS126United States Department of Defense (DoD)UnclassifiedIPv460
AS656United States Department of Defense (DoD)UnclassifiedIPv460
AS467Air Force Systems NetworkingUnclassifiedIPv460
AS27153United States Department of Defense (DoD)UnclassifiedIPv460
AS5052United States Department of Defense (DoD)UnclassifiedIPv460
AS463Air Force Systems NetworkingUnclassifiedIPv460
AS1553United States Department of Defense (DoD)UnclassifiedIPv460

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 AS27065, 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.

No exchange membership on file. That is not the same as peering nowhere: the dataset records what PCH has collected, and many exchanges publish no participant list at all.

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.