IP to Hosting Provider — ISP, ASN & Co-Hosted Domains

WHOIS and geolocation databases associate IP ranges with organization names — the same metadata registrars publish for abuse contacts and routing policy. We surface org or ISP as hostingProvider so support engineers answering who hosts this site get an immediate string to search internally or compare against known vendor catalogs.

ASN accompanies provider name for BGP-aware analysts tracing upstream transit. Country and city reflect geolocation database centroids — useful hints, not guaranteed server rack locations behind anycast or CDN.

Reverse-IP lookup lists domains publicly correlated with an address today. Count zero suggests dedicated, stale database, or unlisted neighbors. Low counts under five may indicate VPS or small business hosting. Medium six to fifty and high above fifty suggest shared hosting density patterns.

Density label compresses count into readable tiers for dashboards. Exact counts remain in coHostedDomainCount for threshold-based automation.

Fifteen sample hostnames help humans spot risky neighbors — unrelated spam domains, adult content, or phishing sites sharing your IP affect email and reputation even when your content is clean. Samples are illustrative, not exhaustive lists.

Sibling brands legitimately share IPs in corporate deployments — count alone does not imply low quality without content review.

hostingDetected true when org keywords or geolocation hosting flags match known infrastructure patterns. infrastructureType summarizes Hosting or cloud network versus ISP or enterprise network for quick filtering in spreadsheets imported from API JSON.

Enterprise networks may show hostingDetected false despite running internal web servers — org strings read as bank or university names rather than commercial hosts.

Investigators paste domains from phishing reports or competitor URLs. resolvedFrom preserves the hostname that produced the IPv4, essential when a case folder tracks multiple aliases CNAMEing to one address.

Wildcard DNS and parking pages may inflate reverse-IP counts with unrelated domains — manual sample review catches false density inflation.

Proxied sites resolve to CDN org on edge IPs — Cloudflare, Fastly, Akamai. hostingProvider then names the CDN, not WordPress origin host. Disable proxy temporarily or use origin IP finder before provider identification for backend hosts.

Cloud provider detector names hyperscaler when edge and origin share vendor ASN — still distinguish edge caching from origin compute roles in your notes.

Support desks confirm whether a customer self-hosts or uses a known SaaS host before escalating connectivity tickets. Fraud teams compare claimed business location against hosting country metadata. SEO consultants document hosting changes after migration.

Legal teams preserve provider and neighbor evidence during trademark disputes involving lookalike sites on shared infrastructure.

Dedicated server detector interprets the same density data for single-tenant classification. Shared hosting detector adds blacklist checks this page skips. IP history lookup shows past IP assignments for a domain when provider changed over time.

Abuse contact finder retrieves RDAP mailboxes for the network block when you need to report neighbor abuse to the provider.

Extended API action ip-to-hosting-provider returns JSON with hostingProvider, coHostedDomainCount, density, sampleDomains, and asn. Merge into asset inventory when scanning customer-supplied domain lists.

Rate-limit batch jobs — reverse-IP upstreams throttle aggressive polling.

Reverse-IP databases update as crawlers observe DNS changes — newly provisioned sites may lag hours or days. Org metadata changes slowly when IPs transfer between providers via RIR policies.

Re-run lookups after migration cutover weekends to confirm provider name updated.