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ISP changes log: CGNAT, static IP and server rule changes

A dated record of changes to US home ISPs' CGNAT use, static IP offers, IPv6 and terms on running servers, each with its source. Newest first. Subscribe below to get new entries by email, or follow the feed.

Dates: "date on the ISP's document" is the date the ISP printed; "seen on the ISP's site" is when we saw it (the ISP didn't date it); "customer reports" is when customers reported it, not confirmed by the ISP.

ISP policy changes

1. Oct 16, 2026 (seen on the ISP's site) · Cox · Brand and terms

   Cox's site now says "Cox is now Spectrum", and its acceptable use policy link points to Spectrum's

   Cox's acceptable use policy URL redirected to the Spectrum residential policy, which has no explicit ban on servers. The older Cox policy banned servers of any type. Which one applies to Cox customers today isn't confirmed, so the server-rules answer for Cox is "unclear".

   • www.cox.com official

2. Oct 16, 2026 (seen on the ISP's site) · Quantum Fiber / CenturyLink · Brand

   Quantum Fiber's website footer now reads "© 2026 AT&T Intellectual Property"

   Quantum Fiber / CenturyLink pages now carry an AT&T footer. Its CGNAT, static IP and server answers here haven't changed; we'll update them if new terms are published.

   • www.quantumfiber.com official

3. Oct 16, 2026 (seen on the ISP's site) · Frontier Fiber (Verizon) · Terms

   Frontier Internet and Fiber are now covered by Verizon's customer agreement

   After the Verizon-Frontier combination, the Verizon agreement that covers Fios also covers Frontier. It bans hosting "any type of server".

   • www.verizon.com official

4. Oct 16, 2026 (seen on the ISP's site) · Quantum Fiber / CenturyLink · Static IP

   CenturyLink / Quantum Fiber: no new static IP leases

   CenturyLink's static IP FAQ says it is no longer leasing new static IP addresses; existing leases continue.

   • www.centurylink.com official

5. Oct 16, 2026 (seen on the ISP's site) · Spectrum (Charter) · Server rules

   Spectrum's current residential policy has no explicit "no servers" clause

   Older versions banned "any type of server ... not consistent with personal, residential use". The current one limits service to personal, non-commercial household use.

   • www.spectrum.com official

6. Aug 2026 (customer reports) · Frontier Fiber (Verizon) · IPv6

   Frontier fiber starts handing out IPv6 in some areas

   A residential fiber customer posted to a network operators' mailing list that Frontier recently started giving them IPv6, with only a /64 delegated prefix. Not everywhere yet, and Frontier hasn't announced it.

   • customer report community

7. 2026 (customer reports) · Cox · CGNAT

   Some Cox areas moved to MAP-T, and port forwarding stopped working

   Customer reports (Las Vegas) say lines were moved to MAP-T, which shares IPv4 addresses by splitting ports. Asking support to opt out reportedly puts the line back on a full IPv4, sometimes after escalation.

   • customer report community

8. Aug 19, 2025 (date on the ISP's document) · Brightspeed · Server rules

   Brightspeed's subscriber agreement explicitly allows home servers

   The agreement dated 19 Aug 2025 says the service may be used to host a server, personal or commercial, if it follows the agreement. Its section on 4G Home Internet does restrict server devices.

   • www.brightspeed.com official

9. 2025 (customer reports) · Kinetic (Windstream) · Static IP

   Kinetic residential static IPs reportedly discontinued

   A customer report says residential static IPs were discontinued around 2025. Kinetic's own terms still mention static IPs with its Secure Broadband product, so the answer is "unclear".

   • customer report community
   • www.gokinetic.com official

10. Nov 13, 2023 (date on the ISP's document) · Mediacom · Server rules

    Mediacom's residential acceptable use policy updated; servers still banned

    The policy (last updated 13 Nov 2023) bans servers that provide services to anyone outside your home, naming email, web hosting, file sharing and proxy servers.

    • mediacomcable.com official

11. Nov 1, 2023 (date on the ISP's document) · Ziply Fiber · Static IP

    Ziply Fiber's 50 Gig home plan includes static IPv4 and IPv6

    Ziply's press release: the 50 Gig plan costs $900 a month and comes with static IPv6 and IPv4 addresses.

    • ziplyfiber.com official

Updates to our data

Answers we added or corrected, with the ISP pages they touched. Each answer shows its own "Last checked" date on the ISP page.

• Oct 17, 2026: AT&T Fiber: inbound ports 25, 80 and 443 not blocked, from AT&T's network practices port table (25 is blocked outbound only). WOW!: server rules "restricted" and ports 25/80/443 not allowed for servers, from its residential internet terms. AT&T Fiber, WOW!
• Oct 17, 2026: Sparklight: inbound ports 25 (restricted for residential), 80 and 443 (not on its blocked list) from its own blocked-ports article. Viasat: server rules "restricted" from its acceptable use help page. Sparklight (Cable One), Viasat
• Oct 17, 2026: Static IP prices from official rate cards for Optimum, Mediacom and Google Fiber. Optimum (Altice), Mediacom, Google Fiber (GFiber)
• Oct 17, 2026: Inbound port 25/80/443 answers added from ISPs' own blocked-ports lists, terms and FAQs. Xfinity (Comcast), Spectrum (Charter), Cox, Optimum (Altice), Astound (RCN / Wave / Grande / enTouch), Glo Fiber (Shentel), Midco, EPB Fiber
• Oct 17, 2026: Verizon 5G Home: CGNAT changed from unknown to "some plans or areas" (low confidence; customer reports go both ways). Verizon 5G Home Internet
• Oct 16, 2026: WOW!: CGNAT "yes" with a free public-IP request, from WOW!'s help center. WOW!
• Oct 16, 2026: Frontier: CGNAT "some" from its network management policy; IPv6 "partial". Frontier Fiber (Verizon)
• Oct 16, 2026: Glo Fiber: inbound ports not blocked (its HOA FAQ). Glo Fiber (Shentel)

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