All ISPs / Quantum Fiber / CenturyLink
Does Quantum Fiber / CenturyLink use CGNAT?
Short answer: No. Quantum Fiber / CenturyLink gives home customers a public IPv4 address, according to customer reports (we found no official Quantum Fiber / CenturyLink statement). Static IP: No new leases. IPv6 is only available in some areas.
Can I self-host on Quantum Fiber / CenturyLink?
Quantum Fiber's website footer now reads "© 2026 AT&T Intellectual Property" (quantumfiber.com, checked 2026-10-16).
| CGNAT by default? | No Confidence: Low: customer reports only; no official ISP statement found. Customer reports (2024–2025): fiber lines get a globally routable but dynamic IPv4, including with the SmartNID in transparent-bridge mode (VLAN 201). We found no Lumen statement.
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| Free opt-out? | N/A |
| Static IP | No new leases Existing leases continue. We are no longer leasing new static IP addresses.
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| Static IP price | Unknown Not yet verified. Know the answer? Submit a report. |
| IPv6 | Partial Customer reports: no native IPv6, only CenturyLink's 6rd tunnel (which your router has to support), described as flaky.
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| Typical upload | Symmetrical on fiber plans. quantumfiber.com: 'Equal Upload & Download Speeds'. Legacy CenturyLink DSL not covered.
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| Terms on running servers | Unknown Not yet verified. Know the answer? Submit a report. |
Source types: official the ISP's own page · official-forum ISP staff on the ISP's forum · community customer reports · secondary a third party quoting the ISP. "Unknown" means we haven't verified it, not that the answer is no.
Is something wrong or missing? Submit a report Check whether you're behind CGNAT