What Is Fiber
Possibly

Your cable modem or coax line is the bottleneck.

On cable, a worn coax run, a corroded splitter, or a DOCSIS 3.0 modem on a DOCSIS 3.1 plan will cap your speeds well below what you're paying for. This is the most under-blamed cause of 'I pay for 600 and get 200.'

Try this first · Free
Check your modem's signal page

Open 192.168.100.1 in a browser. Look for downstream/upstream power and SNR. Downstream should be −7 to +7 dBmV. Upstream 35–51 dBmV. Out of range → call the ISP.

If that doesn't fix it
Get a DOCSIS 3.1 modem

If you're renting an ISP modem, ask whether it's DOCSIS 3.1. If not, demand an upgrade (free with most providers) or buy your own.

Fiber would help here · secondary

If you've been chasing cable plant issues for months and fiber is available at your address, switching is often easier than continuing to debug.

Check fiber availability

ZIP for quick check, or full address for census-block precision.

Now powered by live FCC data. Provider list comes from the FCC Broadband Data Collection (Dec 2024, via ArcGIS Living Atlas), filtered to fiber + cable + 5G. Coverage is reported at the county level — block-by-block availability varies, so always click through to confirm with the provider. Notice an error? Tell us.

Try any US ZIP — we query the live FCC dataset. Example: 29680, 78704, or 94110.