OSINT Radar
IP Address OSINT Operational

Domain/IP lookup

www.infobyip.com

InfoByIP provides bulk IP and domain lookups returning geolocation, ASN, hostname, and WHOIS data for multiple targets simultaneously.

Free Open Source #Domain/IP lookup #IP Address OSINT tools #IP Address OSINT resources #domain #infrastructure #lookup #analysis #attribution #intelligence #network
Open tool

Pivot map

You have ip domain
You get open services hosts infrastructure dns records subdomains

Use this map to decide whether Domain/IP lookup accepts the lead you are holding, and what kind of lead it may return for the next step.

Pivot from here

Outputs from Domain/IP lookup can become inputs for the next tool. These are the most relevant follow-on pivots in the library.

infrastructure, dns records, subdomains domain 4 suggested tools

Investigator Use

InfoByIP Bulk IP Lookup (infobyip.com/ipbulklookup.php) is an online tool that performs simultaneous lookups for multiple IP addresses in a single submission, returning geolocation data, ASN information, hostname, and organization details for each IP. This bulk processing capability makes it efficient for investigations involving large volumes of IP addresses.


For OSINT investigators, bulk IP lookup tools address a practical efficiency problem: investigations frequently surface dozens or hundreds of IP addresses from log files, network captures, threat intelligence feeds, or WHOIS records. Processing these individually through single-IP tools is time-consuming. Bulk lookup tools process the entire list simultaneously and return structured results that can be analyzed as a set.


The geolocation data returned for each IP — country, region, city, and ISP — enables geographic distribution analysis of IP datasets. When investigating a fraud campaign, botnet, or attack infrastructure, understanding the geographic distribution of IP addresses reveals operational patterns, hosting preferences, and potential attribution indicators.


ASN information connects individual IPs to their network operators and enables organization-level clustering. Multiple IPs belonging to the same ASN are hosted by the same network operator, which may indicate centralized infrastructure. Conversely, IPs distributed across many diverse ASNs and countries suggest a distributed or compromised-host infrastructure.


Hostname resolution converts IP addresses to their PTR (reverse DNS) records, which often contain descriptive hostnames that reveal the purpose or operator of a server. Hostnames like mail.company.com or vpn.organization.net provide immediate organizational context.


For network log analysis in incident response, bulk IP lookup allows rapid geolocation and organization enrichment of all external IPs in a log file — a standard initial step in understanding the scope and nature of a security incident.


Limitations: Bulk lookup services rely on GeoIP databases that have accuracy limitations, particularly at city level. IP-to-organization mappings may lag when networks are transferred or reallocated.


Document the full list of IPs submitted, the service queried, and all results returned with query timestamp for investigative records.

Before You Pivot

Record Context

Capture the target, search terms, and why this source is relevant before you leave the page.

Preserve Evidence

Archive volatile pages, save screenshots, and keep timestamps for anything that may change.

Corroborate

Treat one tool as a lead source. Confirm important findings with independent sources.

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