San Francisco Metropolitan Internet Exchange - SFMIX

United States of America

City: San Francisco
Website: https://sfmix.org/

About this IXP

Data last updated December 2025

Capacity at this IXP

3,451 Gbps

Cumulative port speeds of all IXP members. This shows the potential maximum traffic that can be exchanged at this IXP at one time.

Membership and capacity

The size and strength of an IXP is determined by a combination of how many members it has, and the total capacity. Larger networks tend to bring more capacity, which can benefit all members.

Data for San Francisco Metropolitan Internet Exchange - SFMIX as shown in PeeringDB in December 2025

Members of this IXP

ASNs (autonomous system numbers) are listed in PeeringDB

In the last 12 months

ASNs left11
New ASNs joined1

Participates in the MANRS IXP program

IXPs that join this voluntary program apply a framework of enhanced routing security in peering. It signals an extra commitment to responsible Internet stewardship.

Source: MANRS

RIPE Atlas anchor

Organizations that run IXPs can host anchors to measure Internet connectivity and traffic. An anchor is a large capacity probe often used by IXPs.

Source: RIPEStat

Member information

Last sync from PeeringDB: December 2025

View this IXP on PeeringDB

Countries of registration

A summary of member registrations by country. An IXP with a mixture of international and near-neighbor members can indicate that an IXP is influential, or acts as a hub within its region or sub-region.

United States of America: 68
United Kingdom: 3
Canada: 3
Singapore: 3
Japan: 2

View all countries of registration

Australia: 2
Netherlands: 2
China: 1
Lithuania: 1
Switzerland: 1
New Zealand: 1
Portugal: 1
Sweden: 1
France: 1
Hong Kong: 1

Types of network at this IXP

The mix of members is an indication of a strength or focus of an IXP.

Content: 29
Cable/DSL/ISP: 20
NSP: 17
Enterprise: 7
Non-Profit: 7

View all network types

Unknown: 5
Network Services: 3
Educational/Research: 3

Members peering at the route server

70 / 91

The route server is a central hub that makes it easier for all networks to peer without having to create individual agreements with other members.

Members using RPKI

79 / 91

members at this IXP use Resource Public Key Infrastructure (RPKI), a security measure that helps ensure traffic is routed correctly. A member is counted as using RPKI if they have at least one valid ROA.

Peering policies of IXP members

Members of an IXP can choose how they peer with others. The Internet Society encourages open policies where possible.

Member list for San Francisco Metropolitan Internet Exchange - SFMIX

This list uses the data available in PeeringDB, which is based on self-reported data, and was last updated in Pulse December 2025

Name	AS Number	Peering policy	RPKI Enabled
The Constant Company Autonomous system (AS) number: 20473 Type of AS: NSP Peering policy: Selective Port speed: 100 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 56	20473	Selective	Yes
T-Mobile USA Autonomous system (AS) number: 21928 Type of AS: Cable/DSL/ISP Peering policy: Unknown Port speed: 100 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 11	21928	Unknown	Yes
TwentyWAN Network Autonomous system (AS) number: 210000 Type of AS: Network Services Peering policy: Unknown Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: Lithuania Total peering locations for this AS: 8	210000	Unknown	Yes
Two P Autonomous system (AS) number: 6140 Type of AS: NSP Peering policy: Unknown Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 5	6140	Unknown	Yes
VeriSign Global Registry Services Autonomous system (AS) number: 26415 Type of AS: NSP Peering policy: Unknown Port speed: 1 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 63	26415	Unknown	No
Volt Broadband Autonomous system (AS) number: 62809 Type of AS: NSP Peering policy: Unknown Port speed: 20 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 2	62809	Unknown	Yes
Web3 Technologies Inc Autonomous system (AS) number: 62902 Type of AS: Content Peering policy: Selective Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 11	62902	Selective	Yes
Webpass Autonomous system (AS) number: 19165 Type of AS: Cable/DSL/ISP Peering policy: Open Port speed: 100 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 7	19165	Open	Yes
Weebly Autonomous system (AS) number: 27647 Type of AS: Content Peering policy: Open Port speed: 20 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 2	27647	Open	Yes
Wikimedia Foundation Autonomous system (AS) number: 14907 Type of AS: Non-Profit Peering policy: Open Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 13	14907	Open	Yes
WireCat Autonomous system (AS) number: 399888 Type of AS: Content Peering policy: Open Port speed: 1 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 2	399888	Open	Yes
WIZ Autonomous system (AS) number: 54415 Type of AS: Enterprise Peering policy: Unknown Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: Japan Total peering locations for this AS: 6	54415	Unknown	Yes
Yahoo! Autonomous system (AS) number: 10310 Type of AS: Content Peering policy: Selective Port speed: 20 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 90	10310	Selective	Yes
Yelp Autonomous system (AS) number: 33445 Type of AS: Content Peering policy: Unknown Port speed: 1 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 2	33445	Unknown	No
Zeofast Network Global Autonomous system (AS) number: 10111 Type of AS: NSP Peering policy: Unknown Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: China Total peering locations for this AS: 6	10111	Unknown	Yes
zfs.rent Autonomous system (AS) number: 38439 Type of AS: Enterprise Peering policy: Open Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 2	38439	Open	Yes
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