Residential Proxies
Real home IPs from 195+ countries. Bypass geo-blocks with genuine residential IPs that websites trust.
- 195+ country coverage
- City-level targeting
- Rotating & sticky sessions
- 99.9% uptime SLA
Free IP WHOIS LookupCheck IP Ownership, ASN & Network Registration
Instantly look up WHOIS/RDAP registration data for any IP address or domain. See the owning organization, ASN, CIDR network range, RIR registry, registration dates, and abuse contacts. Free, no registration required.
Try:
Enter an IPv4, IPv6 address, or domain name. We query RIR RDAP servers worldwide for real-time registration data.
Recent Lookups
No recent lookups. Enter an IP address or domain above to start.
History is stored locally on your device only.
Rola-IP Products
Need Reliable IPs for Your Research?
WHOIS data is just the beginning. For web scraping, SEO monitoring, and geo-targeted research, you need a proxy network that doesn't get blocked. Rola-IP provides 80M+ residential IPs worldwide.
ISP Proxies
Static IPs from real providers. Look like a genuine home user with long-lasting, trusted IPs.
- Static, never-changing IPs
- Real ISP registration
- Premium ASN reputation
- Ideal for social media & accounts
Datacenter Proxies
Ultra-fast 10 Gbps speed. Ideal for bulk scraping, SEO monitoring, and high-volume data collection.
- 10 Gbps bandwidth
- Unlimited concurrent sessions
- 99.5% success rate
- Instant delivery
Understanding IP WHOIS & RDAP
Regional Internet Registries (RIRs)
- ARINNorth America
whois.arin.net - RIPE NCCEurope, Middle East, Central Asia
whois.ripe.net - APNICAsia-Pacific
whois.apnic.net - LACNICLatin America & Caribbean
whois.lacnic.net - AFRINICAfrica
whois.afrinic.net
How to Read WHOIS Results
| Field | What It Tells You |
|---|---|
| Organization | The company or entity that has been allocated this IP block. Examples: Google LLC, Amazon.com, Cloudflare Inc. |
| Network Range (CIDR) | The IP address block range in CIDR notation (e.g., 8.8.8.0/24). Shows how many IPs are in this allocation. |
| ASN / AS Name | The Autonomous System Number and its registered name. ASNs are used for BGP routing on the internet. |
| Net Type | Indicates how the IP block was allocated: Direct Allocation, Direct Assignment, Reallocated, etc. |
| RIR / Registry | The Regional Internet Registry that manages this IP block (ARIN, RIPE, APNIC, LACNIC, or AFRINIC). |
| Country | The country where the IP block is registered — not necessarily where traffic exits. |
| Registration Date | When this IP block was first registered with the RIR. |
| Updated Date | The last time the registration record was modified. |
| Abuse Contact | Email address for reporting network abuse, spam, or malicious activity originating from this IP block. |
IP WHOIS vs. IP Location Lookup
| Feature | IP WHOIS Lookup | IP Location Lookup |
|---|---|---|
| Data Source | RIR WHOIS/RDAP databases | Commercial geo-IP databases |
| Key Information | Organization, ASN, CIDR range, registration dates | City, ISP, latitude/longitude, timezone |
| Best For | Network ownership research, abuse reporting, BGP analysis | Geolocation, content localization, fraud detection |
| Update Frequency | Changes when IP blocks are reassigned | Continuously updated by geo-IP vendors |
Common Use Cases
Abuse & Spam Reporting
Find the abuse contact email for any IP to report spam, DDoS attacks, port scanning, or other malicious activity directly to the network owner.
Network Research & BGP Analysis
Check ASN, CIDR range, and registration dates to understand IP routing, peering relationships, and network topology.
Security Investigation
Verify the owning organization behind suspicious IPs. Determine if an IP belongs to a hosting provider, VPN service, or legitimate enterprise.
Domain/IP Ownership Verification
Confirm who controls an IP range or domain before engaging in business transactions, partnerships, or legal proceedings.
Networking Education
Learn how IP address allocation works, understand CIDR notation, and explore the global internet governance structure through real-world lookups.
Help
Frequently Asked Questions
What is IP WHOIS lookup?
IP WHOIS lookup is a free tool that retrieves public registration information about an IP address — including the owning organization, ASN (Autonomous System Number), CIDR network range, registration and update dates, RIR registry, country, and abuse contact email. It queries the global WHOIS/RDAP system maintained by the five Regional Internet Registries (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC).
How do I perform an IP WHOIS lookup?
Enter any IPv4 or IPv6 address (or domain name) into the search box and click 'Lookup WHOIS'. Our tool queries real-time RDAP data to show the organization that owns the IP, the network range, ASN, country, RIR registry, and abuse contacts. Results appear in a clean card format with collapsible details.
What information can I get from an IP WHOIS lookup?
A WHOIS lookup returns: Organization name, CIDR network range (e.g., 8.8.8.0/24), ASN and AS name, Net type (Direct Allocation, etc.), RIR registry (ARIN, RIPE, APNIC, LACNIC, or AFRINIC), Country, Registration and last-updated dates, and Abuse contact email for reporting issues.
Can I look up domain WHOIS with this tool?
Yes. This tool supports both IP addresses and domain names. For domains, it retrieves registrar information, registration/expiration dates, name servers, and registrant details (when not privacy-protected).
What is a Regional Internet Registry (RIR)?
RIRs are organizations that manage the allocation and registration of IP addresses within specific world regions. The five RIRs are: ARIN (North America), RIPE NCC (Europe/Middle East/Central Asia), APNIC (Asia-Pacific), LACNIC (Latin America/Caribbean), and AFRINIC (Africa). Each maintains its own WHOIS database.
What is an ASN and why does it matter?
An ASN (Autonomous System Number) is a unique identifier assigned to a network or group of networks managed by a single organization (like an ISP or large enterprise). Knowing the ASN helps understand who controls the IP address, what routing policies are in place, and whether the IP belongs to a hosting provider or residential ISP.
How is this different from IP Location Lookup?
IP Location Lookup shows the geographic location, ISP, and connection type of an IP. IP WHOIS Lookup goes deeper — it reveals the official registration data from the RIR databases: the organization that owns the IP block, the exact network CIDR range, ASN details, and administrative/abuse contacts. Use WHOIS for ownership research; use Location for geolocation.
What is RDAP and how is it different from WHOIS?
RDAP (Registration Data Access Protocol) is the modern replacement for the traditional WHOIS protocol. It returns structured JSON data instead of plain text, supports internationalized registration data, provides differentiated access levels, and includes built-in HTTPS encryption. This tool uses RDAP when available.
Is WHOIS data always available for every IP?
Not always. Some IP blocks, especially those used by VPNs, proxies, or private networks, may show limited WHOIS data. Additionally, certain registries may restrict access or redact some fields. If no WHOIS data is found, the tool will display whatever information is publicly available.
Does this tool expose the querying user's identity?
No. All WHOIS queries are performed from Rola-IP's servers, not your browser. The target IP's registry only sees our query server's IP address. Your personal IP and identity are never exposed to the WHOIS databases being queried.
Related Tools
Explore More IP Tools
What's My IP
Instantly see your public IP address, ISP, and location. Simple one-click IP check.
Check My IP →IP Address Lookup
Look up the geographic location, ISP, timezone, and security status of any IP address.
Look Up IP →Proxy Checker
Test proxy servers for speed, anonymity, and location. Bulk check up to 50 proxies.
Coming soonBlacklist Checker
Check if an IP is on any DNS blacklists. 100+ blacklists checked for email & web reputation.
Coming soon