AS40271 San Francisco Metropolitan Internet Exchange (SFMIX)
AS40271 (SFMIX-TRANSIT) is registered to San Francisco Metropolitan Internet Exchange (SFMIX) in US. It originates 3 prefixes in the global routing table.
Who holds AS40271
Names from RIPE NCC’s daily list of every allocated AS number. The ASN lookup fetches the full WHOIS record live.
What AS40271 announces
Prefixes originated by AS40271 in the RouteViews table (refreshed every four hours), each checked against the RPKI (every ten minutes) and the IRR (daily).
Announced prefixes
Each opens its own page: who announces it, the paths our collectors see, its ROAs and route objects.
RPKI valid RPKI invalid no ROA covers it
Who AS40271 is reached through
The AS just before AS40271 in the paths our looking glass collectors hold, for 3 of its prefixes. Usually a transit provider, sometimes a peer. The number is how many of those prefixes it was seen on.
Provider authorization
AS40271 publishes an ASPA naming this provider. 1 AS name it as a provider in theirs. Check a path.
The 1 ASes that name AS40271 as a provider
Routing registry objects
From the mirrored IRR databases (RADB, the five RIRs and more). Look it up live.
Route objects with origin AS40271: ARIN 4