All ISPs / altafiber (Cincinnati Bell / Fioptics)
Does altafiber (Cincinnati Bell / Fioptics) use CGNAT?
Short answer: No. altafiber (Cincinnati Bell / Fioptics) gives home customers a public IPv4 address, according to altafiber (Cincinnati Bell / Fioptics)'s own documentation plus customer reports. Static IP: Yes (residential add-on). IPv6 is available, so devices can still be reachable over IPv6.
Can I self-host on altafiber (Cincinnati Bell / Fioptics)?
| CGNAT by default? | No Confidence: Medium: ISP hints or confirms part of it; the rest is customer reports. altafiber's documents say you get a dynamic IP that the router receives by DHCP and suggest a normal public address, but they never say 'public' or mention CGNAT. altafiber's terms supplement says the service includes one dynamic IP address, and its bring-your-own-gateway spec has the router's WAN get its IPv4 by DHCP. Neither page uses the word 'public' for the dynamic address, so this is a hint, not a statement. It includes FUSE as the ISP and one Dynamic IP address.
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| Free opt-out? | N/A No CGNAT indicated by altafiber's documents. |
| Static IP | Yes (residential add-on) Static IPs need altafiber's own gateway; customer-owned gateways can't use the static-IP option. (1) Static IP address or (5) Static IP addresses can be purchased for an additional monthly fee.
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| Static IP price | Unknown altafiber says static IPs cost 'an additional monthly fee' but doesn't list the price. |
| IPv6 | Yes Per altafiber's bring-your-own-gateway spec: IPv6 is assigned dynamically, with a delegated prefix. Dynamic assignment of IPv4 and IPv6 IP Address. (Subnet Mask and Default Gateway and IPv6 prefix provided by altafiber once connected to the network).
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| Typical upload | Symmetrical on fiber plans (e.g. the 400/400 Mbps label lists 427 Mbps typical upload). Older or promotional tiers may differ; check the label for your address.
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| Terms on running servers | No explicit ban altafiber's High-Speed Internet terms (January 2026) list banned uses (unlawful content, spam, malware, disrupting the network) but no explicit ban on running servers.
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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.
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