Internet provider · 9-STATE · Fiber
SiFi Networks
UK-headquartered open-access fiber builder. SiFi puts in the fiber, you pick from competing retail ISPs over it. Same model as UTOPIA — actual price competition at the same address.
- Parent company
- SiFi Networks (private — UK-headquartered)
- Founded
- 2012
- Headquarters
- London, UK
- Service types
- Fiber
- States served
- 9 states: AZ, CA, FL, IL, NJ, OH, TX, VA, WI
- ZIPs covered
- ~45
- Residential subs
- ~7,500 (2026-Q1)
- Gateway fee
- Included
- Install fee
- Free
- Contract
- None
Plans & pricing
| Tier | Down | Up | Price | Data cap |
|---|---|---|---|---|
| (retail ISP varies) | 1 Gbps | 1 Gbps | $65/mo | Unlimited |
Notes: OPEN-ACCESS — SiFi builds the fiber, customers pick a retail ISP (multiple competing). Same model as UTOPIA Fiber. Builds dubbed 'FiberCity'.
Cities + markets served
- Fullerton CA
- East Hartford CT
- Saratoga Springs NY
- Salem MA
- San Leandro CA
- Placentia CA
- 11 more 'FiberCity' deployments
Ownership & corporate history
Ownership type: private (since 2012)
UK-headquartered. Builds the open-access fiber; you sign with a retail ISP for service.
Customer service & support
- Customer service
- (through your retail ISP)
- Technical support
- (through your retail ISP)
- Billing
- (through your retail ISP)
- Support portal
- https://sifinetworks.com/contact/
- Mailing address
- SiFi Networks, 4640 Admiralty Way, Suite 500, Marina del Rey, CA 90292
Returning your equipment
Accepted return methods: through-retail-isp
You must return: (through your retail ISP — SiFi only owns the fiber backbone)
Common mistake: Two-party model. SiFi owns the fiber; your retail ISP owns the router. Return router to retail ISP.
Does SiFi Networks serve your address?
Use our ZIP-coverage tool to confirm availability — we cross-reference live FCC Form 477 data with the carrier's own footprint map.
Check coverage at my ZIP →Sources & verification
Last verified 2026-06-06. Records over 180 days old are auto-flagged for re-verification.