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Does Frontier give you a public IP? (CGNAT and port forwarding)

Short answer: It depends on the line. Frontier's own network management policy says your address may be public or a CGN (carrier-grade NAT) address, without saying who gets which. Community posts suggest most Frontier Fiber lines get a public dynamic IPv4. IPv6 is only starting to roll out, and the customer agreement that now covers Frontier bans hosting servers.

Does Frontier use CGNAT?

Sometimes, by Frontier's own account. Its network management policy says the service uses "an internet protocol address, which may be a publicly-routable Internet protocol address or a privately managed IP address utilizing CGN (Carrier Gateway NAT) technology." It doesn't say which plans, technologies or areas get CGN, so check your own line (below). The policy is linked on the Frontier ISP page.

Path to a full public IPv4

If your line is behind CGN: we haven't verified a Frontier opt-out or a residential static IP yet. Ask support whether your line uses a public or a CGN address and whether it can be switched. If you've done it, tell us what Frontier said; it fills a gap in the data for everyone.

Static IP: not verified for home plans. See static IP prices by ISP for the providers where we have a price.

Terms and ports

• Terms: since the Verizon-Frontier combination, Frontier Internet and Fiber fall under the same Verizon customer agreement as Fios, which says you may not "use the Services to host any type of server or commercial network or subnetwork." Read it before hosting anything others connect to.
• Ports 25, 80 and 443: we haven't found a Frontier source that says whether they're blocked.

What about IPv6?

Partly. A residential fiber customer reported on a network operators' mailing list (August 2026) that Frontier had just started giving them IPv6, with only a /64 delegated prefix. Frontier hasn't published anything about it, and it isn't everywhere yet. The checker shows whether IPv6 works on your line.

How to confirm on your line

1. Follow how to tell if you're behind CGNAT: a router WAN IP in 100.64.0.0/10 means CGN.
2. Forward a port and run the checker's port test. Its report sums up what you can host.

More detail and sources: Does Frontier use CGNAT? · Can I self-host on Frontier?

This site sticks to ISP facts. It doesn't review or recommend third-party products or services. Based partly on customer reports; policies change.