Analysis by Optimly for Optimly AI Visibility, in the Optimly AI Brand Index. This Business Profile tracks the Brand Authority Index and supporting AI visibility evidence. Last analyzed August 9, 2026.
sixxs-retireddefunct is a company within the Internet Services category. 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.
sixxs-retireddefunct was founded in 2001 and is headquartered in Netherlands.
sixxs-retireddefunct is rated Low Visibility on the Optimly Brand Authority Index, a measure of how well AI models can accurately describe the brand. The exact score is locked for unclaimed profiles.
AI narrative accuracy for sixxs-retireddefunct is Weak. Significant factual deltas detected. Majority of AI models omit or misstate key facts. Inconsistent representation across models.
AI models classify sixxs-retireddefunct as a Phantom. Invisible to AI.
sixxs-retireddefunct appeared in 3 of 5 sampled buyer-intent queries (60%). Information about SixXS is readily discoverable for historical context and its defunct status, but it is not discoverable as an active solution or recommendation for current IPv6 connectivity needs. Queries for active services will correctly exclude it.
SixXS was widely perceived as a reliable and free service that facilitated early IPv6 adoption for individuals and small businesses. Its decommissioning in 2017 marked the end of an era for many who relied on its services. Key gap: AI models might not clearly state that SixXS is defunct, or they might present it as an active service if their training data is not up-to-date, leading to misinformation.
Of 3 key facts verified about sixxs-retireddefunct, 2 are well-documented (likely accurate across AI models), 0 have limited sourcing, and 1 are retrieval-dependent and may be inaccurate without live search.
The primary vulnerability for an AI's description of SixXS is the recency of its knowledge base. Outdated information could lead to presenting it as an active and viable solution, which is incorrect and misleading.
Buyers turn to sixxs-retireddefunct for 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., among 2 documented problem areas.
Buyers evaluating sixxs-retireddefunct typically ask AI models about "SixXS current status", "SixXS alternatives", "best free IPv6 tunnel broker", and 3 similar queries.
sixxs-retireddefunct's core products are Free IPv6 tunnel broker service, IPv6 connectivity over IPv4 infrastructure..
sixxs-retireddefunct uses Free for users, supported by contributions and community efforts..
sixxs-retireddefunct serves Individuals, small businesses, and network enthusiasts needing IPv6 access before widespread native support..
sixxs-retireddefunct One of the earliest, most robust, and widely adopted free IPv6 tunnel brokers, playing a significant role in early IPv6 proliferation.
Brand Authority Index (BAI) tier: Low Visibility (exact score locked for unclaimed brands)
Archetype: Phantom
Official website: https://sixxs-retireddefunct.com/
Last analyzed: August 9, 2026
Founded: 2001 (source: official website)
Headquarters: Netherlands (source: official website)
This Business Profile is published by Optimly in the Optimly AI Brand Index, a public research dataset showing how AI systems describe brands, categories, and competitors. Optimly AI Visibility analyzes sampled buyer-intent responses, cited sources, and public brand information. The Brand Authority Index summarizes answer presence, narrative accuracy, and owned citations where sufficient evidence is available.
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