/reverseip takes an IPv4 or IPv6 address as well as a domain and returns
every domain on it, page by page, as JSON, with their number in
meta.domain_count. With "order": "relevance" the list starts
like the one on this page. A free account comes with an API key and
100 calls a day.
curl -X POST https://api.webxtrend.com/v1.0/reverseip \
-H 'Content-Type: application/json' \
-d '{"token": "YOUR_TOKEN", "query": "3.167.227.30", "order": "relevance"}'