US ISP IPv6 support › Spectrum

Does Spectrum support IPv6?

Yes. Spectrum Internet provides native dual-stack IPv6 alongside IPv4. Spectrum’s own Wi-Fi router enables it by default; on your own router, IPv6 has to be switched on.

Run the full IPv6 connectivity test → It also checks dual stack, DNS, response times and large packets.

How Spectrum delivers IPv6

• The Spectrum Wi-Fi router, or your own router connected to the Spectrum modem, receives an IPv6 prefix by DHCPv6 prefix delegation and advertises a /64 to your devices.
• Devices on the home network get IPv6 automatically through SLAAC.

Getting IPv6 on your own router

1. Connect your router’s WAN port to the Spectrum modem and set the WAN IPv6 to DHCPv6 (sometimes labelled “Native” or “Automatic”) with prefix delegation.
2. Spectrum delegates a /64 by default. Routers that send a prefix size hint can ask for a larger prefix, but if IPv6 stops working after asking for one, go back to /64.
3. After replacing a router, power-cycle the modem so it accepts the new router’s DHCPv6 request.

If the test finds no IPv6

• If the router shows an IPv6 WAN address but devices get none, check that prefix delegation and router advertisements are enabled on the LAN side.
• Spectrum Mobile runs on another carrier’s network and is not included in the numbers on this page.

About these numbers

The measured rate is the share of connectivity tests on this site, run from Spectrum connections in the United States, in which IPv6 worked. Source: Charter Spectrum regional networks AS20001, AS10796, AS20115, AS11426, AS33363, AS11427, AS12271 and AS11351 combined. Tests are counted, not people, so someone who tests several times is counted several times; no IP addresses are stored. A rate below 100% usually means some customers have IPv6 switched off on their router or use a router that does not request IPv6, not that the network lacks IPv6.

Other US providers: AT&T · Comcast Xfinity · Verizon · T-Mobile