VSPIC
DNS Tools

Neighbor Domains Lookup — Co-Hosted Sites on Same IP

List domains co-hosted on your site's IP with hosting density and provider context

How to Use This Tool

  1. Enter a website domain or IPv4 address.
  2. Domains resolve to current IPv4 A record before analysis.
  3. Reverse-IP lookup lists other domains on the same address.
  4. Geolocation returns hosting provider, ASN, ISP, and country.
  5. Blacklist check summarizes DNSBL status for the IP.
  6. hostingType and recommendation interpret density and org keywords.

About This Tool

Shared IPv4 addresses mean shared reputation — mail blacklists, attack traffic, and SEO neighborhood effects can spill across unrelated tenants. VSPIC neighbor domains lookup calls shared-hosting with your domain or IPv4: resolves domains to hosting IP, fetches reverse-IP neighbor list, attaches geolocation org and ISP metadata, blacklist summary, hostingType classification, domainCount, sample co-hosted domains, and recommendation text about neighbor reputation risk.

Use before signing shared hosting contracts, during abuse triage on suspicious IPs, and when explaining deliverability issues that correlate with noisy neighbors rather than your own SPF configuration.

Common use cases

  • •View all DNS records of a domain after migration
  • •Confirm DNS records after domain changes
  • •Test for DNS leaks when using a VPN
  • •Debug email delivery with MX and TXT records

Why use VSPIC for ?

  • See co-tenants sharing your production IP in one query.
  • hostingType labels shared vs dedicated density heuristically.
  • Blacklist summary flags IP-level listings affecting mail.
  • Works with domain or raw IPv4 input.
  • Sample neighbor list for manual reputation eyeballing.
  • Same shared-hosting backend as shared hosting detector.

Why neighbor domains matter

SMTP reputation and some security scores treat IP as a unit of trust. A pharmacy spammer on your shared IP can depress mail deliverability for your SaaS receipts even when SPF and DKIM are perfect. Knowing neighbor domains is the first step toward requesting migration or dedicated IP upgrade.

Law enforcement and abuse desks listing co-tenants helps upstream hosts identify bulk bad actors on overcrowded slices.

Reading hostingType and domainCount

domainCount is reverse-IP list length. hostingType escalates from Dedicated / single-tenant through Shared hosting to Shared hosting (high density) when counts exceed fifty or org strings match mass-market hosting keywords.

recommendation text warns when many sites share the IP — expect neighbor reputation effects on email delivery.

CDN and proxy caveats

Domains behind Cloudflare resolve to edge IPs with thousands of unrelated neighbors — neighbor lists look alarming but reflect CDN pooling, not your origin tenant mix. Run origin IP finder then neighbor lookup on candidate origin addresses.

Compare hostingProvider org field — Amazon, Cloudflare, and GoDaddy patterns interpret differently in recommendation copy.

Blacklist summary context

DNSBL listings on the IP affect all co-tenants until delisted. blacklistSummary states listed zone count or clean status. Pair with spamhaus lookup for detailed zone breakdown on the same address.

Your domain may be clean while IP is listed — neighbor domains lookup explains possible cause.

Versus shared hosting detector

Both use shared-hosting API. Shared hosting detector emphasizes dedicatedLikely boolean for isolation decisions. Neighbor domains lookup emphasizes co-tenant enumeration vocabulary for operators searching neighbor domains phrasing. JSON is the same — pick the UX page your team prefers.

Cross-link dedicated server detector when negotiating single-tenant contracts.

API shared-hosting action

GET /ip-tools/api/extended?action=shared-hosting&query=example.com or domain parameter. Parse coDomains or sample domains field names from JSON, domainCount, hostingType, recommendation.

Cache briefly — neighbor lists change as hosting customers churn.

Authorization

Lookup domains and IPs you own or abuse desks authorize. Neighbor lists are public reverse-IP correlation, not proof sites coordinate.

Important notes & limitations

  • Reverse-IP databases incomplete — neighbors missing from list.
  • CDN edge IPs show massive unrelated co-tenant counts.
  • List may truncate for display on dense shared hosts.
  • Does not score each neighbor's content — manual review required.
  • IPv6 neighbor correlation not the focus of this IPv4 path.

Frequently Asked Questions

Yes. VSPIC offers this neighbor domains lookup at no cost with no account required. Results load in real time.

We do not permanently store your queries on our servers. Some tools run entirely in your browser; others fetch public data for the request only.

Yes. Open the page in any modern phone or tablet browser. Results work on Wi‑Fi and mobile data.

Another hostname whose domain currently associates with the same IPv4 in reverse-IP databases.

CDN edge IPs serve many customers. Test origin IP neighbors instead of edge pools.

No. Reverse-IP snapshots are incomplete and may truncate.

Yes on shared IPs — blacklistings and spam complaints can impact co-tenants.

shared-hosting with query, domain, or ip parameters.

Historical hosting lookup adds IP history timeline. Neighbor lookup focuses on current co-tenant list and hosting classification.

Next step for your check

Continue with shared hosting detector on VSPIC.

Shared Hosting Detector

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