CenturyLink / Quantum Fiber internet in Longmont, CO
CenturyLink / Quantum Fiber reports service to about 89% of residential locations in Longmont, Colorado, which ranks it #3 of 8 providers with meaningful coverage. CenturyLink and Quantum Fiber are Lumen's consumer internet brands. They offer DSL in many areas and fiber (branded Quantum Fiber) where it has been built out.
How CenturyLink / Quantum Fiber compares in Longmont
| # | Provider | Technology (varies by address) | Locations covered |
|---|---|---|---|
| 1 | City of Longmont | Fiber | 99% |
| 2 | Xfinity | Cable | 97% |
| 3 | CenturyLink / Quantum Fiber | Fiber, DSL | 89% |
| 4 | T-Mobile Home Internet | Fixed wireless | 70% |
| 5 | JAB Wireless | Fixed wireless | 52% |
| 6 | Verizon | Fiber, Fixed wireless | 52% |
| 7 | AT&T | Fiber, DSL, Fixed wireless | 27% |
| 8 | Smiling J | Fiber, Fixed wireless | 5% |
Share of residential locations in Longmont where each provider reports service (FCC National Broadband Map, data as of December 31, 2025). See all providers in Longmont.
CenturyLink / Quantum Fiber vs other providers
What technologies are available in Longmont?
Fiber is widely available: about 99%+ of locations in Longmont can get it. Gigabit-class service (1,000 Mbps down) is reported for about 99% of locations. DSL is still reported for about 64% of locations, which can be a fallback where fiber and cable do not reach. Fixed wireless home internet is reported for about 80% of locations.
FCC National Broadband Map, data as of December 31, 2025: share of residential locations in Longmont that providers report they can serve. City-level figures, not your address.
CenturyLink / Quantum Fiber in places near Longmont
- Frederick, CO (60%)
- Firestone, CO (70%)
- Erie, CO (92%)
- Berthoud, CO (58%)
- Lafayette, CO (87%)
- Boulder, CO (96%)
- Louisville, CO (89%)
- Broomfield, CO (94%)
Plans and pricing
Plan prices and promotions change often and vary by address, so we do not list them. See CenturyLink / Quantum Fiber's current offers at your address with its availability checker.
Frequently asked questions
Is CenturyLink / Quantum Fiber available in Longmont?
CenturyLink / Quantum Fiber reports service to about 89% of residential locations in Longmont, per FCC data as of December 31, 2025. That ranks it #3 of 8 providers with meaningful coverage here. Availability depends on your exact address.
What type of internet does CenturyLink / Quantum Fiber offer in Longmont?
CenturyLink / Quantum Fiber offers fiber, dsl service across its footprint. The FCC summary does not say which technology reaches each address, so check your address with the provider.
Who are the main CenturyLink / Quantum Fiber competitors in Longmont?
Other providers reporting at least 10% coverage in Longmont include City of Longmont (99%), Xfinity (97%), T-Mobile Home Internet (70%), JAB Wireless (52%).
How do I check CenturyLink / Quantum Fiber availability at my address?
Use CenturyLink / Quantum Fiber's own address checker, or enter your ZIP code here to compare all providers for your area.
Compare all providers for your ZIP code
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