All ISPs / Spectrum (Charter)
Does Spectrum (Charter) use CGNAT?
Short answer: Sometimes. Spectrum (Charter) uses CGNAT on some plans or in some areas, according to Spectrum (Charter)'s own documentation plus customer reports. Static IP: Business only. IPv6 is available, so devices can still be reachable over IPv6.
Can I self-host on Spectrum (Charter)?
| CGNAT by default? | Some plans/areas Confidence: Medium: ISP hints or confirms part of it; the rest is customer reports. A Charter engineering talk at NANOG 71 (2017) documents Charter's MAP-T deployment (IPv4 address sharing over IPv6). That's an official but non-customer-facing source; which customers are on MAP-T or CGNAT today is from customer reports. Community reports say Spectrum generally does not use CGNAT but uses MAP-T (a different IPv4-sharing method) in places, and some markets report CGNAT. Not confirmed by Spectrum.
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| Free opt-out? | Unknown Not yet verified. Know the answer? Submit a report. |
| Static IP | Business only The residential AUP forbids configuring a static IP; static IPs are sold as a Spectrum Business add-on.
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| Static IP price | Unknown Not yet verified. Know the answer? Submit a report. |
| IPv6 | Yes Community reports: IPv6 with a /56 via DHCPv6 prefix delegation; not guaranteed static.
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| Typical upload | 20–35 Mbps advertised on the 100 Mbps–1 Gig plans (typical 23–40 Mbps). About 1,000 Mbps on 2 Gig and ~7,800 Mbps on 7 Gig where offered. Spectrum's broadband disclosure: Internet 100 and 500 = 20 Mbps up (typical 23), 1 Gig = 35 Mbps up (typical 40).
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| Terms on running servers | No explicit ban The current Spectrum Residential AUP (verified 2026-10-16) has no explicit 'no servers' clause; it limits service to residential, non-commercial use. Older versions banned 'any type of server ... not consistent with personal, residential use'. The Residential Services are for personal and family use (residential use only) within a single household. ... You may not use, or enable others to use, any Service to operate any type of business or commercial enterprise.
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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