An IP address is not an identity

An IP address can identify a network endpoint at a particular time. Address registration and routing information can show the network resource holder or announcing autonomous system. Neither necessarily identifies the individual running an application.

Content delivery networks, reverse proxies, cloud platforms and shared hosting can place unrelated domains behind the same addresses. Geolocation is an estimate and does not prove the physical location of a suspect or organization.

Corroboration before attribution

Separate the registrar, DNS provider, network holder, hosting platform and site operator. They may be entirely different organizations. Reverse DNS names are configuration information and should not be used as the only basis for attribution.

Corroborate infrastructure links with registration evidence, authorized provider disclosures, incident artifacts and other lawful sources. A hosting provider’s abuse team may help preserve or address abuse, but a public lookup cannot recover private subscriber records.

Reporting the limits

Use precise language: “resolved to this address at this time” is stronger and more defensible than “owned by this host.” State whether proxying or shared infrastructure may affect the assessment.

  • Record the IP, record type and observation time.
  • Separate resource holder from application operator.
  • Document possible proxy or CDN use.
  • Avoid converting geolocation estimates into identity claims.

Sources and further reading

RIPE NCC — RIPE DatabaseRFC 9082 — RDAP query format
This resource supports investigative triage. It is not legal advice, an attribution finding or a certification that a website is safe.