Expired domains with NCBI backlinks
This page lists 437 expired domains with NCBI backlinks. Each has expired, is available to register, and has at least one referring domain from NCBI that survived the original site going offline. Names are masked on Free; the Starter and Business plans show every name. Every metric is open.
About this list
The NCBI link is found, not claimed. Referring domains are counted from our own web crawl, not from a paid link index. Availability is re-checked against the live DNS root over DNS-over-HTTPS, and a listing that turns out to be registered is removed. Site history comes from archived captures: the archived snapshot count and the span of years the site was captured. Revised Score blends link-graph centrality, referring domains and site history into one 0 to 100 grade, computed across the whole directory.
A link from NCBI is one signal. Read it alongside the referring domain band, the site history and the Revised Score on each listing, and browse the other sources for domains linked by universities, encyclopedias, communities and press.
Frequently asked questions
- How do I find expired domains with NCBI backlinks?
- Browse this page. Every listing has at least one referring domain from NCBI in our web crawl, has expired, and is available to register. Names are masked on Free, the Starter and Business plans show every name, and metrics are open. Starter and Business show the name; then register it at any registrar.
- How do you know a domain has a link from NCBI?
- The link was found in our own web crawl, pointing from a NCBI page at the listed domain. The graph is a snapshot of the crawl at the time it was built, so a link removed since then can still appear until the next snapshot is processed.
- Does a NCBI backlink still help after the domain expires?
- It depends on what you build. The link stays in place as long as the NCBI page does, and it resolves to whatever is at the domain now. Google's expired domain abuse policy targets expired domains repurposed for unrelated content, so a site that continues the old domain's subject keeps the benefit and one that changes subject should not expect to.
