Trust, but Verify
ISPs are notorious for "up to" marketing. "Up to 500 Mbps" can legally mean 50 Mbps during peak hours if you don't read the fine print. Regular net speed test audits are your only defense.
Peak Hours Traffic
Cable internet is a shared medium. When your neighbors get home at 6 PM, does your speed tank? Run a net speed test at 8 PM and compare it to 8 AM. If there's a 50% drop, your local node is congested.
Building a Case Your ISP Can't Dismiss
A single low result gets you nowhere with customer support — they'll blame your WiFi and close the ticket. Instead, run a net speed test wired directly into your modem (bypassing your router entirely) at the same three times every day for a full week, and save every result with a timestamp. If you're consistently seeing 40%+ below your contracted speed during the same hours, you have a documented pattern an ISP finds harder to wave away — and in some US states, grounds to request a credit or penalty-free cancellation.
Know What "Up To" Actually Means
FCC rules require ISPs to deliver at least 80% of advertised speeds during 80% of peak hours to qualify as accurately marketed. If your documented numbers fall consistently below that threshold, you can file a complaint backed by your data — regulators take logged, timestamped evidence far more seriously than a single screenshot.
Frequently Asked Questions
How often should I run a net speed test to verify my ISP?
Three times a day for at least a week — once in the morning (low-traffic baseline), once at peak evening hours (7-10 PM), and once late at night. This pattern reveals whether your ISP is delivering consistently or only during off-peak windows when their network has slack capacity.
What should I do if my ISP isn't delivering contracted speeds?
Document everything first — dates, times, wired test results, and your plan's advertised speed. Then contact support with that data in hand and reference the FCC's broadband labeling requirements. If they're unresponsive, most US states allow you to file a complaint directly with the FCC or your state's public utilities commission.
State-Level Consumer Protection Beyond the FCC
Several US states have their own broadband consumer protection laws with lower evidentiary bars than federal complaints — checking your state attorney general's consumer protection division alongside an FCC complaint can open an additional avenue for resolution, particularly in states with active net neutrality enforcement.
What ISPs Are Required to Fix vs What They're Not
ISPs are held to the speed delivered on their FCC Broadband Label, not to a theoretical best-case number — documented evidence needs to show underperformance against that specific labeled figure, not against marketing language, to carry real weight in a complaint.
Third-Party Documentation Tools
Automated logging tools that run scheduled speed tests and save results without manual intervention (some routers support this natively, or a dedicated always-on device can run one) produce a more consistent evidence trail than manually remembering to test three times a day for a week.