Who else is on an IP

On shared-hosting platforms, website builders and CDNs, one IP can carry thousands of domains. This is where our data is strongest.

1. Look up the IPCopy Anchor Link

lookup_ip is one request and tells you how big the list is before you fetch it.

curl https://api.ipalmanac.com/v1/ip/<ip> \
  -H "Authorization: Bearer $IPALMANAC_API_KEY"

Look at:

• domains.current_count and domains.sample: how many domains resolve to the IP in our latest observation, and up to 10 of them.
• is_cdn, is_datacenter, provider and prefix: whether the IP is in a CDN's, cloud's or hosting provider's published range. A CDN edge serves many unrelated customers.
• asn.category: what kind of network routes it, such as hosting or isp.
• ptr.names: the IP's reverse DNS name, when we have checked it.

2. List the domainsCopy Anchor Link

ip_domains lists every domain seen on the IP, one item per stretch of time it resolved there, oldest first. Add include_ended=true to see domains that have since left.

curl "https://api.ipalmanac.com/v1/ip/<ip>/domains?include_ended=true&limit=1000" \
  -H "Authorization: Bearer $IPALMANAC_API_KEY"

Each page counts one request, so a list of 5,000 items costs 5 requests at limit=1000, or 50 on the Free plan, whose pages hold at most 100. See Pagination.

3. Read the listCopy Anchor Link

• first_observed is when we first saw the domain on the IP; ended_at is when we saw it gone. It left somewhere between its last_confirmed and ended_at.
• Domains on the same IP are neighbors, not the same owner, especially on a CDN edge or a big shared host.
• An empty list means we haven't seen any of the domains we resolve on the IP, not that nothing is hosted there. Residential, ISP and small dedicated-server addresses are often empty.