Frequently asked questions

Use the coverage checker on our Coverage page or call 1-800-FAULTLINE. We service most of the Tucson metro plus parts of Phoenix, Cochise, and Graham counties.

No. All residential plans are month-to-month with no early termination fee. Business plans typically have a 12-month minimum term.

For most addresses we offer self-install within 48 hours. Pro install windows are typically 5-7 business days. Fiber-to-the-home installs that require new drops can take 10-14 business days.

Fiber gives you symmetric upload/download and lower latency. Cable is widely available and reliable but uploads are slower. Where both are available we recommend fiber.

No, we currently bundle TV with an internet plan.

You can pause residential service for up to 90 days per calendar year, free, from /account/billing.

Credit/debit card (Visa, Mastercard, AmEx, Discover), ACH bank transfer, and Apple/Google Pay. Business customers can use NET-30 invoicing.

Yes, on request. There is no fee for paper bills.

Yes — $5/mo off any residential plan with autopay enabled.

30-day money-back guarantee on new residential installs. Equipment purchases can be returned within 14 days for a full refund minus shipping.

No. We can rent you a router/modem for $10/mo or you can buy one outright through our shop. You can also bring your own approved equipment — see our compatibility list.

Yes for fiber and DSL. For cable we require an approved DOCSIS 3.1 modem; the router behind it is yours to choose.

Mesh nodes can be added to your equipment rental for $5/mo per node.

Fiber, DSL, and business plans are uncapped. As of September 2024 our residential cable plans are also uncapped.

Run a wired test at speed.faultline.example to see your actual throughput. Wi-Fi tests are useful but capped by your router and signal — wired is the source of truth.

It is queuing delay during congestion. We deploy AQM (CAKE / fq_codel) on most equipment to keep latency low under load. See our blog post on bufferbloat for details.

On fiber plans you get burst capacity above your tier when the network has capacity. No additional charge.

Yes, on business plans. A single static IPv4 is $10/mo. Static /29 and /28 blocks are available on Dedicated Internet Access plans.

Yes — Phoenix IX, Equinix Phoenix, and AnyMile. We are working on Las Vegas peering for Q1 2025.

Yes. As of July 2024 every residential connection is dual-stack by default. New fiber drops in 2025 will be IPv6 + DS-Lite.

We do not throttle, prioritize, or block lawful traffic. Read the full policy at /legal/aup.

Yes. The default resolvers are 8.8.8.8 / 8.8.4.4 but you can configure any resolvers on your CPE, including DoH/DoT.

We do not use CGNAT on fiber or DSL — every residential connection gets a real public IPv4. Cable plans are dual-stack with a public IPv6 and a CGNAT IPv4; you can request a public IPv4 free of charge.

Check /support/outages first — known issues are listed there. To report a new one, call 1-800-FAULTLINE or use the chat in your customer portal.

Business plans target 99.9% uptime. Dedicated Internet Access plans carry a 99.99% uptime SLA with service credits — see /legal/sla.