AS40271 — SFMIX-TRANSIT

Network type: hosting

AS40271 announces 2 IPv4 prefixes covering 768 addresses and 1 IPv6 prefixes.

About this network

SFMIX-TRANSIT is operated by San Francisco Metropolitan Internet Exchange (SFMIX).

What it's used for

• The address space carries transit infrastructure for the exchange, with netnames SFMIX-V4-TRANSIT-2 and SFMIX-V4-LEGACY-TRANSIT and reverse DNS pointing to apple-edge-cache.transit.sfmix.org.
• The AS announces 768 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining 9 observed neighbours; this ratio of small address inventory to moderate peering indicates a transit provider role rather than an access network.
• Traffic from this AS consists of transit services for member networks peering at SFMIX locations, facilitating local traffic exchange within the San Francisco Bay Area.

Notable

• Registrants for both announced prefixes are consistent with the announcer, identified as San Francisco Metropolitan Internet Exchange (SFMIX).
• SFMIX is a nonprofit, member-governed Internet Exchange based in San Francisco, California, operating as a regional network service provider.
• The inventory consists of two small IPv4 blocks and one IPv6 /48, reflecting a focused infrastructure footprint rather than a large residential or enterprise estate.

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

Announced prefixes

• 149.112.115.0/24
• 149.112.188.0/23
• 2620:11a:b002::/48

Upstream networks

• AS6939 Hurricane Electric LLC
• AS24482 SG.GS

Downstream networks

• AS6140 Two P
• AS35008 Kerfuffle, LLC

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS24482 SG.GS
• AS6140 Two P
• AS35008 Kerfuffle, LLC

Internet exchanges

• Equinix Internet Exchange San Jose (Bay Area) — San Jose, United States
• San Francisco Metropolitan Internet Exchange — San Francisco, United States
• Equinix IBX Secaucus — Secaucus, United States