AS25829 — SMITHSONIAN

AS25829 announces 11 IPv4 prefixes covering 62,464 addresses and 1 IPv6 prefixes.

About this network

The AS handle SMITHSONIAN is operated by the Smithsonian Institution.

What it's used for

• The address space carries internal corporate infrastructure for the Smithsonian Institution, as indicated by the consistent SI netname across the majority of prefixes.
• The AS announces 62,464 IPv4 addresses across 11 prefixes and 1 IPv6 prefix, while maintaining only 5 observed neighbours. This high address-to-neighbour ratio indicates an internal corporate estate with site-by-site segmentation rather than a transit or access network.

Notable

• Registrants for the primary 160.111.0.0/17 block and associated subnets are listed as Smithsonian Institution, aligning with the AS holder. One /24 prefix (38.127.143.0/24) is registered to Cogent Communications, LLC with the netname COGENT-A, suggesting a specific leased or peering arrangement.
• The inventory is dominated by the 160.111.0.0/17 block, which is subdivided into multiple smaller prefixes, reflecting a finely managed internal network structure.

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

Announced prefixes

• 38.127.143.0/24
• 160.111.0.0/17
• 160.111.128.0/22
• 160.111.136.0/21
• 160.111.144.0/20
• 160.111.160.0/19
• 160.111.192.0/19
• 160.111.224.0/22
• 160.111.228.0/23
• 160.111.231.0/24
• 160.111.240.0/20
• 2001:550:7708::/48

Upstream networks

• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC
• AS11164 Internet2
• AS11537 Internet2

Downstream networks

• AS27922 Smithsonian Tropical Research Institute

Adjacent networks

• AS3356 Level 3 Parent, LLC
• AS174 Cogent Communications, LLC
• AS27922 Smithsonian Tropical Research Institute
• AS11164 Internet2
• AS11537 Internet2