WHOIS
Lookup an IP or domain. Uses IANA referral first, then registry WHOIS.
### IANA response (whois.iana.org) % IANA WHOIS server % for more information on IANA, visit http://www.iana.org % This query returned 1 object refer: whois.lacnic.net inetnum: 200.0.0.0 - 200.255.255.255 organisation: LACNIC status: ALLOCATED whois: whois.lacnic.net changed: 2002-11 source: IANA ### Registry response (whois.lacnic.net) % IP Client: 2001:41d0:305:2100:0:0:0:5cfe % Joint Whois - whois.lacnic.net % This server accepts single ASN, IPv4 or IPv6 queries % LACNIC resource: whois.lacnic.net % Copyright LACNIC lacnic.net % The data below is provided for information purposes % and to assist persons in obtaining information about or % related to AS and IP numbers registrations % By submitting a whois query, you agree to use this data % only for lawful purposes. % 2026-05-11 03:03:24 (-03 -03:00) inetnum: 200.5.64.0/18 status: allocated aut-num: AS10834 owner: Telefonica de Argentina ownerid: AR-TEAR7-LACNIC responsible: Luis Francisco Pérez Sánchez address: Av. Independencia, 169, PB address: 1099 - Buenos Aires - CF country: AR phone: +54 8102220102 [0000] owner-c: TEA tech-c: TEA abuse-c: TEA inetrev: 200.5.64.0/23 nserver: UL1.SATLINK.COM nsstat: 20260508 AA nslastaa: 20260508 nserver: UN1.SATLINK.COM nsstat: 20260508 AA nslastaa: 20260508 inetrev: 200.5.72.0/23 nserver: NUSTAL05.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260430 nserver: NUSTAL08.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260430 inetrev: 200.5.99.0/24 nserver: UL1.SATLINK.COM [lame - not published] nsstat: 20260509 UH nslastaa: 20260425 nserver: UN1.SATLINK.COM [lame - not published] nsstat: 20260509 UH nslastaa: 20260425 inetrev: 200.5.80.0/24 nserver: NUSTAL05.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 nserver: NUSTAL08.ADVANCE.COM.AR [lame - not published] nsstat: 20260510 NOT SYNC ZONE nslastaa: 20260326 inetrev: 200.5.117.0/24 nserver: NUSTAL05.ADVANCE.COM.AR nsstat: 20260508 AA nslastaa: 20260508 nserver: NUSTAL08.ADVANCE.COM.AR nsstat: 20260508 AA nslastaa: 20260508 inetrev: 200.5.116.0/24 nserver: NUSTAL05.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 nserver: NUSTAL08.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 inetrev: 200.5.121.0/24 nserver: UL1.SATLINK.COM [lame - not published] nsstat: 20260509 UH nslastaa: 20260430 nserver: UN1.SATLINK.COM [lame - not published] nsstat: 20260509 UH nslastaa: 20260430 inetrev: 200.5.81.0/24 nserver: NUSTAL05.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 nserver: NUSTAL08.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 inetrev: 200.5.113.0/24 nserver: NUSTAL05.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 nserver: NUSTAL08.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 inetrev: 200.5.112.0/24 nserver: NUSTAL05.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260425 nserver: NUSTAL08.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260425 inetrev: 200.5.110.0/24 nserver: NUSTAL05.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 nserver: NUSTAL08.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 inetrev: 200.5.102.0/24 nserver: UL1.SATLINK.COM nsstat: 20260508 AA nslastaa: 20260508 nserver: UN1.SATLINK.COM nsstat: 20260508 AA nslastaa: 20260508 inetrev: 200.5.101.0/24 nserver: UL1.SATLINK.COM nsstat: 20260509 UH nslastaa: 20260505 nserver: UN1.SATLINK.COM nsstat: 20260509 UH nslastaa: 20260505 inetrev: 200.5.114.0/24 nserver: NUSTAL05.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260503 nserver: NUSTAL08.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260503 inetrev: 200.5.115.0/24 nserver: NUSTAL05.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 nserver: NUSTAL08.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 inetrev: 200.5.118.0/24 nserver: NUSTAL05.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260503 nserver: NUSTAL08.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20240307 inetrev: 200.5.90.0/24 nserver: NUSTAL05.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 nserver: NUSTAL08.ADVANCE.COM.AR nsstat: 20260510 AA nslastaa: 20260510 inetrev: 200.5.104.0/24 nserver: NUSTAL05.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260503 nserver: NUSTAL08.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260503 inetrev: 200.5.122.0/24 nserver: NUSTAL05.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260430 nserver: NUSTAL08.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260107 inetrev: 200.5.91.0/24 nserver: UL1.SATLINK.COM nsstat: 20260510 AA nslastaa: 20260510 nserver: UN1.SATLINK.COM nsstat: 20260510 AA nslastaa: 20260510 inetrev: 200.5.92.0/24 nserver: NUSTAL05.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260421 nserver: NUSTAL08.ADVANCE.COM.AR [lame - not published] nsstat: 20260509 UH nslastaa: 20260421 created: 20010109 changed: 20100412 nic-hdl: TEA person: Telefonica de Argentina e-mail: tasamail.ar@tmoviles.com.ar address: AV. ING. HUERGO, 723, address: 1065 - Capital Federal - BA country: AR phone: +54 11 43335000 created: 20030618 changed: 20250828 % whois.lacnic.net accepts only direct match queries. % Types of queries are: POCs, ownerid, CIDR blocks, IP % and AS numbers.
Frequently Asked Questions
What is WHOIS?
WHOIS is a protocol that queries databases to find the registered owner of a domain name or IP address. It reveals the registrar, registration dates, nameservers, and contact information associated with a domain or IP block.
Is WHOIS data always accurate?
Not always. Many domain registrars offer WHOIS privacy protection that replaces the registrant's personal details with proxy information. IP WHOIS data from Regional Internet Registries (RIRs) is generally more reliable than domain WHOIS data.
Can I use WHOIS to find who owns an IP address?
Yes. Enter any IP address into the WHOIS tool to find the organization that owns the IP block, the Regional Internet Registry (ARIN, RIPE, APNIC, etc.) that allocated it, and the network range it belongs to.
What is the difference between domain WHOIS and IP WHOIS?
Domain WHOIS shows registration details like the registrar, creation date, expiry date, and nameservers. IP WHOIS shows the network allocation, the organization that owns the IP block, and the abuse contact for reporting issues.
Why does WHOIS show privacy protection instead of real details?
Domain registrars offer WHOIS privacy services to protect registrants from spam, identity theft, and unwanted contact. GDPR regulations in Europe also require redaction of personal data from WHOIS records.
How often is WHOIS data updated?
WHOIS data is updated by the registrar or registry whenever changes are made to a domain or IP registration. Our tool queries the authoritative WHOIS server in real-time, with results cached for 7 days to reduce server load.
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