Speed Test The Ultimate Guide To Test Your Ziply Fiber Internet Speed

Testing Your Ziply Fiber Connection Actually Works Differently Than Most People Expect

You're getting 400 Mbps on the speed test but your 1 Gbps plan should be delivering closer to 950. This happens more often than it should, and usually the issue isn't with Ziply's infrastructure but with how the test is being run. I spent three years troubleshooting residential fiber issues before I stopped guessing and started measuring correctly. Here's what actually matters when you're checking your connection. Ziply operates primarily in Washington, Oregon, and Idaho. Their residential tiers run from 100 Mbps up to 1 Gbps, with business options reaching 10 Gbps symmetric. Where they don't have fiber, they offer fixed wireless, which behaves completely differently under load. This matters because the testing approach changes depending on whether you're on actual fiber or wireless. Start with the basics that most people skip. Connect via Ethernet. A wired Cat5e or Cat6 cable directly from your modem to your laptop eliminates every variable except the ISP connection itself. WiFi introduces channel interference, distance attenuation, and competing devices that have nothing to do with your actual internet speed. If your equipment doesn't have a wired port, stop here and read this again later when you do. A $15 USB-to-Ethernet adapter will save you hours of troubleshooting.

Close every application running in the background. Streaming services, cloud sync software, game clients, browser tabs with video content—these all consume bandwidth during the test window. A single Chrome tab with a YouTube video in the background can eat 5 to 10 Mbps. Shut them down. Then disconnect or physically turn off any smart home devices, security cameras, and other machines on the same network that might be uploading or downloading simultaneously. For the actual test, Cloudflare Speed Test at test.mymedia.cloudflare.com gives cleaner results than most consumer-facing sites. It uses multiple parallel connections and reports both download and upload with jitter and packet loss data. Ookla's Speedtest.net works fine too, but it pushes branded servers aggressively and its default settings sometimes route through heavily congested endpoints. If you use Speedtest.net, manually select a server within your city or the nearest major metro. Auto-selection is a reliable way to get artificially low numbers. Latency on Ziply fiber should typically fall between 3 and 12 milliseconds to a local server. If you're seeing 20ms or higher on a wired connection to a nearby test server, something is misconfigured. Run the test three times at different hours of the day and record each result. A single measurement is a snapshot, not a pattern. Network conditions shift throughout the day, and one slow reading doesn't tell you much on its own.

I ran into a specific problem that took me about forty minutes to resolve last year. A customer's speeds were consistently landing around 780 Mbps on download when her plan was 1 Gbps. Upload was sitting at roughly 400 Mbps instead of the expected 900 Mbps. Download looked acceptable but upload was clearly degraded. The issue wasn't the line or the ONT. It was her own router sitting between the ISP modem and her LAN, creating a double NAT situation that was mangling upload throughput. She had plugged her Modem into her own router's WAN port instead of bypassing it entirely. Once I had her connect the test laptop directly to the Ziply gateway, upload jumped to 910 Mbps immediately. The fix took about ninety seconds once we knew where to look. Another thing people overlook is the difference between TCP and UDP performance. Most speed tests measure TCP throughput, which is what web browsing and file downloads use. But video conferencing, online gaming, and VoIP rely heavily on UDP. TCP has congestion control mechanisms that throttle your speed when it detects packet loss or retransmissions. UDP doesn't. If your test shows 900 Mbps download but your Zoom calls are choppy, the problem might be UDP performance, not raw bandwidth. There isn't a great public tool for testing UDP throughput, but running a test during a period when other household devices are active will expose real-world degradation that an empty-network test won't show. Check your modem and router equipment. Ziply provides gateways that handle routing, WiFi, and modem functions in one box. These are generally adequate but they're also the most common single point of failure. If you're using a separate modem and router setup, make sure the modem is in bridge mode. Running a router behind a router creates nested NAT tables that add latency and can interfere with symmetric speed delivery on fiber connections. Bridge mode on the modem and letting your own router handle the routing eliminates that layer of overhead.

Your ISP plan determines your ceiling, but your internal network determines your floor. A 1 Gbps plan means nothing if your computer's NIC, your cable, or your router's switching fabric can't handle more than 300 Mbps. Check your Ethernet adapter specifications. Most modern computers support Gigabit Ethernet natively, but older machines or those using USB-to-Ethernet adapters on USB 2.0 ports will cap out well below your plan speed. USB 2.0 maxes out around 350 Mbps theoretical, usually delivering closer to 280 to 320 Mbps in practice. If your adapter shows 100 Mbps link speed in your system settings, you've got a cable or port problem, not an ISP problem. There's a persistent myth that running a speed test at night will give you worse results due to network congestion. This is partially true but not as dramatic as people think. Fiber networks have enormous capacity, and Ziply's fiber infrastructure is less prone to the congestion patterns that affect cable ISP networks. Cable shares bandwidth across a neighborhood node, so evenings are genuinely rough. Fiber is point-to-point from the central office to your premises, so shared bandwidth concerns are minimal. You'll still see some variation, but it should be far less than 10 percent in either direction. If you're seeing 40 percent drops at peak hours, something else is wrong. Don't ignore packet loss and jitter. These numbers appear on Cloudflare's test results and on Speedtest.net's advanced view. Packet loss above 0.5 percent and jitter above 5 milliseconds indicate an unstable connection regardless of your raw speed numbers. An unstable connection feels slower than a stable connection at half the speed because retransmissions and bufferbloat kill responsiveness. This is the difference between a plan that feels fast and one that just tests fast. If your packet loss is consistently above 1 percent, contact Ziply support and request a line quality check. They can run diagnostics on their end that reveal signal-to-noise ratio problems, connector degradation, or ONT issues that aren't visible through a speed test alone.

One final thing that costs people time: browser caching and test server affinity. Some testing platforms remember your last server selection and default to it. If you previously tested through a server in Seattle while you're actually in Spokane, your results will be slower than they should be. Clear your browser cache before testing or use an incognito window to force a fresh selection. It's a small thing that goes unnoticed frequently.