US ISP IPv6 support › T-Mobile

Does T-Mobile Home Internet support IPv6?

Yes. T-Mobile’s network is IPv6-first: phones and Home Internet gateways get IPv6, and IPv4 websites are reached through translation (464XLAT) or carrier NAT.

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

How T-Mobile delivers IPv6

• On T-Mobile, your device or gateway gets a public IPv6 address. IPv4-only websites still work because the connection translates IPv4 traffic, so the IPv4 address you see belongs to T-Mobile, not to you.
• Devices connected directly to the T-Mobile Home Internet gateway’s Wi-Fi or LAN ports get IPv6 automatically.

Getting IPv6 on your own router

1. T-Mobile Home Internet gateways are not built to delegate an IPv6 prefix to a router you add behind them, so devices behind your own router often get IPv4 only.
2. To keep IPv6, connect devices to the gateway directly, use your router as an access point (bridge or AP mode), or use a router that supports IPv6 relay or NDP proxy on its WAN.

If the test finds no IPv6

• If this test finds no IPv6 on T-Mobile, check for a VPN, a privacy or tracking-protection setting, or your own router between the device and the gateway.

About these numbers

The measured rate is the share of connectivity tests on this site, run from T-Mobile connections in the United States, in which IPv6 worked. Source: T-Mobile network AS21928. 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