IP WHOIS Lookup
Look up your IP address, reverse DNS, approximate location, ASN, owner, abuse contact, registered range, and public network registration details.
IP lookup summary
Single IP report
Approximate location
- Network
- Ahrefs Pte LTD / AS140577
- Organization
- Ahrefs USA
- Network domain
- ahrefs.com
- Connection type
- Connection type was not returned.
- Postal code
- 20147
Show approximate map
Ashburn area
Network and WHOIS details
Registration dataConnection
- Lookup IP
- 168.100.149.181Ashburn, Virginia, United States
- Reverse DNS
- proxy-us003-san31.ahrefs.net
- Your IP
- 168.100.149.181Checking WebRTC IP...
- Detected through
- Direct connection
- Address type
- IPv4 / Public
- User agent
- Mozilla/5.0 (compatible; AhrefsSiteAudit/6.1; +http://ahrefs.com/robot/site-audit)
WHOIS registration
- Address range
- 168.100.128.0 - 168.100.159.255
- CIDR
- 168.100.128.0/19
- Network name
- APNIC
- Organization
- Asia Pacific Network Information Centre (APNIC)
- Country
- AU
- Abuse contact
- search-apnic-not-arin@apnic.net
- Data source
- WHOIS / whois.arin.net
View raw WHOIS response
# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # # # Query terms are ambiguous. The query is assumed to be: # "n 168.100.149.181" # # Use "?" to get help. # NetRange: 168.100.128.0 - 168.100.159.255 CIDR: 168.100.128.0/19 NetName: APNIC NetHandle: NET-168-100-128-0-1 Parent: NET168 (NET-168-0-0-0-0) NetType: Early Registrations, Transferred to APNIC OriginAS: Organization: Asia Pacific Network Information Centre (APNIC) RegDate: 2020-11-19 Updated: 2020-11-19 Ref: https://rdap.arin.net/registry/ip/168.100.128.0 ResourceLink: https://apps.db.ripe.net/db-web-ui/query ResourceLink: whois://whois.apnic.net OrgName: Asia Pacific Network Information Centre OrgId: APNIC Address: PO Box 3646 City: South Brisbane StateProv: QLD PostalCode: 4101 Country: AU RegDate: Updated: 2012-01-24 Ref: https://rdap.arin.net/registry/entity/APNIC ReferralServer: whois://whois.apnic.net ResourceLink: http://wq.apnic.net/whois-search/static/search.html OrgAbuseHandle: AWC12-ARIN OrgAbuseName: APNIC Whois Contact OrgAbusePhone: +61 7 3858 3188 OrgAbuseEmail: search-apnic-not-arin@apnic.net OrgAbuseRef: https://rdap.arin.net/registry/entity/AWC12-ARIN OrgTechHandle: AWC12-ARIN OrgTechName: APNIC Whois Contact OrgTechPhone: +61 7 3858 3188 OrgTechEmail: search-apnic-not-arin@apnic.net OrgTechRef: https://rdap.arin.net/registry/entity/AWC12-ARIN # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. #
Sources: location data from ipwho.is, maps from OpenStreetMap, and registration data from public WHOIS servers.
What can you learn from an IP WHOIS lookup?
Use this IP WHOIS lookup tool to check any public IPv4 or IPv6 address and see the network details behind it. The report can show the IP owner, ISP or hosting provider, ASN, route, IP range, country, reverse DNS, and abuse contact when that information is published by the registry.
An IP lookup is useful when you want to identify a proxy IP, datacenter IP, VPN endpoint, server address, crawler, suspicious login, or unknown visitor from your website logs. It combines IP geolocation, reverse DNS lookup, and public WHOIS registration data so you can understand who operates the address and where the network is registered.
Common searches include IP address lookup, IP WHOIS, IP owner lookup, ASN lookup, reverse DNS checker, proxy IP lookup, IP range lookup, and abuse contact lookup. Geolocation results are approximate, but WHOIS and RDAP data can help confirm the public network, organization, and registration source for the address.
- IP WHOIS lookup
- IP address lookup
- Reverse DNS lookup
- ASN lookup
- IP owner lookup
- Proxy IP lookup
- IP range details
- Abuse contact lookup
How to use the IP WHOIS lookup
Enter a public IP address in the lookup box or leave the field filled with your current IP. The tool checks the IP location, reverse DNS, network owner, ASN, address range, route, and available WHOIS or RDAP registration details. The copied lookup URL can be shared with teammates or saved in support tickets.
What the lookup results mean
The location section usually identifies the ISP gateway, hosting region, or nearby city. The WHOIS registration section is better for ownership signals such as organization name, network name, CIDR, route, origin ASN, country, and abuse contact. Reverse DNS can also reveal hostnames used by servers, crawlers, and proxy providers.
Proxy, VPN, and datacenter checks
For proxy research, the most useful fields are ASN, ISP, organization, reverse DNS, and IP range. These details help distinguish residential-looking networks from cloud hosting, datacenter proxies, VPN gateways, mobile carriers, and server farms. For larger proxy lists, use the linked IPs Locations tool.
Security and log investigation
Website owners can use this IP address lookup to review login attempts, spam submissions, scraping traffic, firewall logs, and suspicious requests. If an abuse contact is available, it may be used when reporting spam, attacks, malware, compromised servers, or repeated unwanted traffic from the same network.
Need to check many IPs?
This page is optimized for one detailed IP WHOIS report at a time. If you need to paste a full proxy list or compare many addresses, use the IPs Locations tool to process IPs and proxies in bulk and copy the results in your preferred format.
Related IP tools
Use these free proxy and IP tools together when you need to test proxies, format proxy lists, check locations in bulk, or investigate owner and reverse DNS details.
IP WHOIS FAQ
What is WHOIS?
WHOIS shows public registration information for an IP address, including the network range, organization, country, route, and abuse contact when available.
What is RDAP?
RDAP is a modern registration data protocol. This tool uses RDAP as a fallback when traditional WHOIS servers are unavailable or blocked.
What is reverse DNS?
Reverse DNS attempts to find the hostname assigned to an IP address. Not every IP address has a reverse DNS record.
Why is the location approximate?
IP geolocation usually identifies an ISP, hosting provider, gateway, or nearby city. It should not be treated as an exact physical location.
Is this lookup private?
The lookup runs from this website and queries public IP data services. Avoid entering private information or addresses you do not want checked.
What is my IP address?
Your IP address is the public address visible to websites and online services. It may belong to your ISP, hosting provider, VPN, proxy, or mobile network depending on how you are connected.
Who owns this IP address?
The IP owner is usually the organization, ISP, datacenter, cloud provider, or regional network listed in WHOIS or RDAP registration data for that address range.
What is an ASN lookup?
An ASN lookup identifies the autonomous system that announces an IP route. This can help reveal the network operator, routing organization, and provider behind an IP address.
Can I check a proxy, VPN, or datacenter IP?
Yes. A proxy IP lookup can show the provider, ASN, country, reverse DNS, and network range for public proxy, VPN, hosting, and datacenter addresses.
What is an abuse contact?
An abuse contact is the email or contact point published by the network owner for spam, attacks, fraud, compromised servers, or other security reports.
What is the difference between IP geolocation and WHOIS?
IP geolocation estimates where an IP address is used, while WHOIS and RDAP show registration data for the network that owns or manages the IP range.
Can reverse DNS identify a server or proxy?
Reverse DNS can reveal a hostname for an IP address when one is configured. It may show a server name, provider pattern, proxy host, mail server, crawler, or generic ISP hostname.
Why do multiple IPs show the same owner or ASN?
Many IP addresses belong to the same network block, hosting company, ISP, mobile carrier, or autonomous system. Shared ownership is common for datacenter, proxy, VPN, and cloud provider ranges.
Can I export IP lookup results?
Yes. Single IP lookups can be copied as plain text, table text, or Markdown, and the full report can be downloaded as TXT for spreadsheets, reports, documentation, or support replies.
IP geolocation is approximate and may identify the ISP gateway or a nearby city rather than the visitor's exact position.
Need clean proxies?
IP WHOIS works best with reliable private proxies
After you test, format, locate, or inspect a proxy, move production work to a stable dedicated or semi-dedicated proxy plan.