# sixxs-retireddefunct > Analysis by Optimly for Optimly AI Visibility, in the Optimly AI Brand Index. Last analyzed August 9, 2026. > SixXS was a free IPv6 tunnel broker service that provided users with IPv6 connectivity over existing IPv4 infrastructures. It was decommissioned on June 6, 2017. - Business Profile: https://optimly.ai/brand/sixxs-retireddefunct - Publisher: Optimly (https://optimly.ai) - Dataset: Optimly AI Brand Index (https://optimly.ai/brand) - Official website: https://sixxs-retireddefunct.com/ - Logo: https://logo.clearbit.com/sixxs-retireddefunct.com - Slug: sixxs-retireddefunct - Brand Authority Index tier: Low Visibility - Archetype: Phantom - Category: Internet Services - Last Analyzed: August 9, 2026 ## Buyer Intent Signals Problems: Manual IPv6 Configuration/Deployment: Setting up IPv6 connectivity directly with an ISP or configuring self-managed tunnels (e.g., using a VPS or hardware router for 6in4 tunnels) which requires signi | Rely on Native IPv6 or IPv4 Only: Not using IPv6 at all and relying solely on IPv4, or waiting for ISPs to provide native IPv6 support without additional tunneling solutions. Solutions: SixXS current status | SixXS alternatives | best free IPv6 tunnel broker | SixXS IPv6 tunnel setup | history of IPv6 tunnel brokers | Paid VPNs with IPv6: Using commercial VPN services that offer IPv6 connectivity as part of their package, which can provide IPv6 access, though it's not a direct tunnel broker.