asn.dev

Observed topology

AS1554 DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD)

Unclassified ARIN

Upstreams 2 carry this network
Downstreams 12 this network carries
Adjacent (IPv4) 14
Adjacent (IPv6) 0
Upstream graph Who carries AS1554, and who carries them, drawn as a map up to the transit-free core. 0 exchanges Where AS1554 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS1554: 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
AS1540Headquarters, USAISCUnclassifiedIPv41,444
AS367United States Department of Defense (DoD)UnclassifiedIPv41

Transit

Downstream networks

All 12

Networks for which AS1554 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS1561United States Department of Defense (DoD)UnclassifiedIPv4471
AS1585United States Department of Defense (DoD)UnclassifiedIPv4467
AS1556United States Department of Defense (DoD)UnclassifiedIPv4294
AS1580United States Department of Defense (DoD)UnclassifiedIPv4233
AS1559United States Department of Defense (DoD)UnclassifiedIPv4175
AS1563United States Department of Defense (DoD)UnclassifiedIPv4174
AS1567United States Department of Defense (DoD)UnclassifiedIPv4174
AS1562United States Department of Defense (DoD)UnclassifiedIPv4120
AS1555United States Department of Defense (DoD)UnclassifiedIPv4118
AS1586United States Department of Defense (DoD)UnclassifiedIPv459

All 12 downstreams →

Adjacency

Adjacent networks

All 14

Every AS seen directly next to AS1554 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS1540Headquarters, USAISCUnclassifiedIPv411,266
AS1555United States Department of Defense (DoD)UnclassifiedIPv47,640
AS1561United States Department of Defense (DoD)UnclassifiedIPv4471
AS1585United States Department of Defense (DoD)UnclassifiedIPv4467
AS1556United States Department of Defense (DoD)UnclassifiedIPv4294
AS1580United States Department of Defense (DoD)UnclassifiedIPv4233
AS1559United States Department of Defense (DoD)UnclassifiedIPv4175
AS1563United States Department of Defense (DoD)UnclassifiedIPv4174
AS1567United States Department of Defense (DoD)UnclassifiedIPv4174
AS1562United States Department of Defense (DoD)UnclassifiedIPv4120

All 14 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-11-10 10:00 UTC by route-views2,rrc00, as seen from 74 BGP vantage points across 71.97M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

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. 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.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.