The 5 Worst ISPs in America (2026 Data)

#5: Frontier DSL — Legacy copper network. 28 Mbps average where fiber is unavailable. 34% miss advertised speeds.

#4: CenturyLink (Lumen) — 19% packet loss spikes during peak hours. Jitter often exceeds 25ms on consumer tiers.

#3: Cox Cable — 41% average speed reduction at 7–11 PM. Multiple documented throttling complaints filed with FCC.

#2: Optimum (Altice) — 52% of users report missing advertised speeds. 0.9% packet loss during gaming sessions.

#1: Xfinity (Comcast) — Most FCC complaints filed in 2025. 39% speed reduction at peak. Data caps on most plans.

Based on 1.8M DCSpeedTest results analyzed in Q1 2026. ISPs ranked by: speed consistency, peak degradation, packet loss.

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