Choosing an internet service provider (ISP) for your home or business requires looking past advertised promotional marketing speeds. Actual delivered bandwidth depends heavily on neighborhood node density, distance from cellular towers, and physical drop wire technology. We detail how to evaluate internet options available in your zip code.
Fiber vs Cable vs 5G Home Internet
Understanding the underlying network physical technology is critical when comparing regional broadband options:
- Fiber Optic (FTTH): Best overall choice. Symmetrical upload/download speeds, lowest latency (3-7ms), and zero peak-hour congestion.
- Cable Internet (DOCSIS): High download speeds (up to 1,200 Mbps) with limited upload speeds (10-35 Mbps). May experience evening speed slowdowns.
- 5G Fixed Wireless (FWA): Fast, budget-friendly download speeds (100-300 Mbps) delivered without installation technicians, but dependent on cell tower distance.
ISP Performance Audit Matrix
| Technology Type | Avg Download Range | Avg Upload Range | Latency Range |
|---|---|---|---|
| Fiber Optic (Fios / AT&T) | 300 – 5,000 Mbps | 300 – 5,000 Mbps | 3 – 8 ms |
| Cable (Xfinity / Spectrum) | 200 – 1,200 Mbps | 10 – 40 Mbps | 14 – 28 ms |
| 5G Home (T-Mobile / Verizon) | 100 – 400 Mbps | 15 – 50 Mbps | 20 – 45 ms |
Run a 10-second speed test on DCSpeedTest to see if you are getting what you pay for.
Why Advertised Speed and Available Speed Differ
ISP marketing typically advertises the fastest tier technically possible on their network in a given region, not necessarily what's actually available at a specific address — a "up to 1 Gig" claim in a neighborhood can mean some addresses get exactly that while others on older infrastructure a few blocks away max out well below it.
How to Actually Check What's Available at Your Address
- Use the FCC's National Broadband Map (broadbandmap.fcc.gov) for an address-level view of which providers report service at your specific location.
- Check each candidate ISP's own availability tool directly — these are generally more current and accurate than third-party aggregators.
- Ask neighbors directly what they actually get, since real delivered speed at nearby addresses is often the most reliable practical indicator.
Comparing Technology Types Fairly
When more than one technology is genuinely available (fiber, cable, 5G fixed wireless), comparing them on upload speed and latency — not just headline download numbers — surfaces the differences that matter most for video calls, gaming, and cloud backup, areas where cable and fixed wireless both trail fiber meaningfully even when download numbers look similar.
Confirming What You're Actually Getting
Once service is installed, running a wired speed test against your plan's advertised rate is the only way to confirm you're getting what you're paying for — checking at different times of day reveals whether any gap is a one-time fluke or a consistent pattern worth raising with support.