Autonomous system
AS40271 SFMIX-TRANSIT
Hosting ARIN NSP
Summary
San Francisco Metropolitan Internet Exchange
transit ix nonprofit bay-area
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-2andSFMIX-V4-LEGACY-TRANSITand reverse DNS pointing toapple-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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange San Jose (Bay Area) | San Jose, United States | 206.223.117.49 |
| San Francisco Metropolitan Internet Exchange | San Francisco, United States | 206.197.187.15 |
| Equinix IBX Secaucus | Secaucus, United States | 206.223.117.49 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 768 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS40271- Registry name
- SFMIX-TRANSIT
- Registrant
- San Francisco Metropolitan Internet Exchange (SFMIX)
- Abuse contact
- tech-c@sfmix.org
- Registered
- 2024-09-11
- Last changed
- 2024-09-11
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- ip.sfmix.org
- Also known as
- SFMIX Transit
- Network type
- NSP
- Scope
- Regional
- Traffic ratio
- Heavy Outbound
- Peering policy
- Open
- IRR as-set
AS-SFMIX-TRANSIT- Present at
- 1 exchanges
- Facilities
- 9 facilities
- Website
- https://ip.sfmix.org
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 3 valid, 0 with no ROA
- ROAs
- 4 authorising AS40271
- ASPA
- 1 declared providers
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 4 naming AS40271
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 436 networks and 1,771 prefixes, as published 2026-10-13. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere