San Francisco Metropolitan Internet Exchange - SFMIX

United States of America

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

About this IXP

Data last updated April 2026

Capacity at this IXP

3,508 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 April 2026

Members of this IXP

ASNs (autonomous system numbers) are listed in PeeringDB

In the last 12 months

ASNs left14
New ASNs joined3

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: April 2026

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: 65
United Kingdom: 3
Canada: 3
Singapore: 3
Japan: 2

View all countries of registration

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

Types of network at this IXP

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

Content: 24
NSP: 19
Cable/DSL/ISP: 18
Enterprise: 7
Non-Profit: 7

View all network types

Network Services: 5
Unknown: 4
Educational/Research: 3

Members peering at the route server

69 / 87

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

77 / 87

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 April 2026

Name	AS Number	Peering policy	RPKI Enabled
Nominet Nameservers Autonomous system (AS) number: 43519 Type of AS: Network Services Peering policy: Open Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: United Kingdom Total peering locations for this AS: 7	43519	Open	Yes
Nutrien Autonomous system (AS) number: 393891 Type of AS: Enterprise Peering policy: Unknown Port speed: 10 Gbps Does this member peer at the route server?: Yes Country of registration: Canada Total peering locations for this AS: 13	393891	Unknown	Yes
OVHcloud Autonomous system (AS) number: 16276 Type of AS: Content Peering policy: Open Port speed: 100 Gbps Does this member peer at the route server?: Yes Country of registration: France Total peering locations for this AS: 81	16276	Open	Yes
ParadoxNetworks Limited Autonomous system (AS) number: 52025 Type of AS: NSP Peering policy: Selective Port speed: 1 Gbps Does this member peer at the route server?: Yes Country of registration: United Kingdom Total peering locations for this AS: 47	52025	Selective	Yes
Paxio Autonomous system (AS) number: 36734 Type of AS: Cable/DSL/ISP 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: 2	36734	Unknown	Yes
PCH AS3856 Autonomous system (AS) number: 3856 Type of AS: Educational/Research Peering policy: Open Port speed: 10 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 319	3856	Open	Yes
PCH AS42 Autonomous system (AS) number: 42 Type of AS: Educational/Research 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: 326	42	Open	Yes
Prodigi Technology Services Limited Autonomous system (AS) number: 138398 Type of AS: NSP Peering policy: Open Port speed: 1 Gbps Does this member peer at the route server?: Yes Country of registration: New Zealand Total peering locations for this AS: 8	138398	Open	Yes
PubMatic Autonomous system (AS) number: 62713 Type of AS: Content 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: 10	62713	Unknown	No
QTS Santa Clara Autonomous system (AS) number: 40913 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: 1	40913	Unknown	Yes
Rackspace Autonomous system (AS) number: 12200 Type of AS: Content 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: 16	12200	Unknown	No
Ridge Wireless Autonomous system (AS) number: 33452 Type of AS: Cable/DSL/ISP Peering policy: Unknown Port speed: 10 Gbps Does this member peer at the route server?: No Country of registration: United States of America Total peering locations for this AS: 3	33452	Unknown	No
Roller Network Autonomous system (AS) number: 11170 Type of AS: NSP Peering policy: Open 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	11170	Open	Yes
RouteViews Autonomous system (AS) number: 6447 Type of AS: Educational/Research Peering policy: Selective 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: 62	6447	Selective	No
Ryamer Autonomous system (AS) number: 400587 Type of AS: Network Services 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	400587	Selective	Yes
Sail Internet Autonomous system (AS) number: 396097 Type of AS: Cable/DSL/ISP 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	396097	Unknown	Yes
Sea Ranch Connect Autonomous system (AS) number: 396032 Type of AS: Cable/DSL/ISP Peering policy: Unknown Speed: Unknown Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 1	396032	Unknown	Yes
SFMIX Autonomous system (AS) number: 12276 Type of AS: Non-Profit Peering policy: Unknown Port speed: 2 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 1	12276	Unknown	Yes
Softcom Internet Communications Autonomous system (AS) number: 13427 Type of AS: Cable/DSL/ISP 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: 2	13427	Unknown	Yes
SpaceX Starlink Autonomous system (AS) number: 14593 Type of AS: Cable/DSL/ISP Peering policy: Open Port speed: 200 Gbps Does this member peer at the route server?: Yes Country of registration: United States of America Total peering locations for this AS: 70	14593	Open	Yes
Starry Autonomous system (AS) number: 395354 Type of AS: Cable/DSL/ISP 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: 7	395354	Unknown	Yes
Tekify Broadband Internet Services Autonomous system (AS) number: 46886 Type of AS: Cable/DSL/ISP 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: 2	46886	Unknown	Yes
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: 57	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
Together Computer Autonomous system (AS) number: 36346 Type of AS: Network Services 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: 1	36346	Open	No
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