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i3 Broadband Speed Test

Maintained by:Data & methodology:Last updated:June 30, 2026Do you work for i3 Broadband? Update this listing

Enter a zip code, city, or address below to see what speeds you can expect in your location for i3 Broadband and other ISPs.

i3 Broadband

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How we measure: a real-world test to a neutral point on the open internet, not a server inside your provider network, so it reflects everyday speed and can read slightly below best-case on-network tests.

We record anonymized results (speed, latency, your provider and coarse location) to publish honest, real-world speed data by provider. No personal information is stored.

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Jump to: What to Expect | Speed Reviews | i3 Broadband Availability

What to Expect from i3 Broadband

i3 Broadband’s fastest available plans reach 8,000 Mbps down / 8,000 Mbps up, and across its footprint typical available speeds are about 4,382 Mbps down / 4,270 Mbps up. These are advertised “up to” figures from FCC availability data, so no connection reaches them exactly. Run the test above to see what your own i3 Broadband line actually delivers.

i3 Broadband Measured Speeds

In real-world tests, i3 Broadband typically delivers around a median 327 Mbps down and 206 Mbps up across the plans its customers actually subscribe to.

Most tests land between 97 and 702 Mbps down. That spread mostly reflects which plan each household buys, not how the network performs.

327 Mbps
Median down
206 Mbps
Median up
37 ms
Latency

Measured at the nearest Cloudflare edge, verified by network operator, and shown as a median so a few unusually fast or slow tests do not skew it. Because most customers do not buy the fastest plan, this median should not be read as what i3 Broadband's top tier delivers. Updated daily.

Compare providers near you

Enter your ZIP or city to see how providers in your area compare.

Providers available in your area come from our coverage data. "Available up to" is the fastest advertised plan; measured speeds appear once a provider has enough independent tests, otherwise we say "collecting" rather than guess.

i3 Broadband Speed Reviews

i3 Broadband has a speed rating of 4.33 out of 5, with a total of 27 reviews and ratings across the United States. Speed ratings by service type include: Fiber: 4.35, Cable: 4.00. If you’d like to tell others about your experience, you can rate or review i3 Broadband here.

Connection

Customer Rating

Fiber

Fiber: 4.35 of 5 stars

(26)

Cable

Cable: 4.00 of 5 stars

(1)

For detailed reviews, visit our i3 Broadband Internet Reviews page.

Top Cities for i3 Broadband

i3 Broadband is available in 92 cities throughout the country. Here is a list of top cities with i3 Broadband internet service:

St. Louis, MO
  • Availability: 9.69%
  • Avg. Download Speed: 8,000 Mbps
Champaign, IL
  • Availability: 88.03%
  • Avg. Download Speed: 1,000 Mbps
Peoria, IL
  • Availability: 69.01%
  • Avg. Download Speed: 1,000 Mbps
Chicago, IL
  • Availability: 0.73%
  • Avg. Download Speed: 8,000 Mbps
Providence, RI
  • Availability: 2.89%
  • Avg. Download Speed: 2,000 Mbps
St. Peters, MO
  • Availability: 58.54%
  • Avg. Download Speed: 8,000 Mbps
Urbana, IL
  • Availability: 69.54%
  • Avg. Download Speed: 1,000 Mbps
Springfield, IL
  • Availability: 26.33%
  • Avg. Download Speed: 1,000 Mbps
Pekin, IL
  • Availability: 88.43%
  • Avg. Download Speed: 1,000 Mbps
Rockford, IL
  • Availability: 16.94%
  • Avg. Download Speed: 8,000 Mbps
Ballwin, MO
  • Availability: 55.63%
  • Avg. Download Speed: 8,000 Mbps
St. Charles, MO
  • Availability: 20.46%
  • Avg. Download Speed: 8,000 Mbps
Galesburg, IL
  • Availability: 72.15%
  • Avg. Download Speed: 8,000 Mbps
Bristol, RI
  • Availability: 89.85%
  • Avg. Download Speed: 2,000 Mbps
Barrington, RI
  • Availability: 95.46%
  • Avg. Download Speed: 2,000 Mbps

Compare i3 Broadband to Other Providers

i3 Broadband vs AT&Ti3 Broadband vs Coxi3 Broadband vs Centurylinki3 Broadband vs Frontieri3 Broadband vs Brightspeedi3 Broadband vs Google Fiberi3 Broadband vs Astound Broadbandi3 Broadband vs Earthlinki3 Broadband vs Fidiumi3 Broadband vs Brown Dog NETWORKS

i3 Broadband Speed Test FAQ

Why is my i3 Broadband speed lower than advertised?

Advertised speeds are “up to” peaks measured on an ideal connection. Real-world speed to a neutral point on the open internet runs a few percent lower, and Wi-Fi, older equipment, or peak-hour congestion lower it further. For the truest read of your i3 Broadband line, test over a wired connection.

How does ISPReports measure i3 Broadband speeds?

Tests run against the nearest of Cloudflare’s edge locations, so the result reflects your access network rather than a server inside i3 Broadband’s own network. We verify each result by network operator, aggregate it as a median (not an average, which a few fast tests would skew), and only publish a provider’s measured speeds once enough independent tests exist. We do not accept provider-submitted numbers.

Is i3 Broadband good for gaming and video calls?

Run the test above. The connection-quality grade reads latency under load and packet loss, which determine whether calls and games stay smooth, beyond the raw download number.