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WHOIS

Lookup an IP or domain. Uses IANA referral first, then registry WHOIS.

Query
186.238.18.99
IANA
whois.iana.org
Referred
whois.lacnic.net
WHOIS servers can rate limit. Results are cached for performance.
### 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:      186.0.0.0 - 186.255.255.255
organisation: LACNIC
status:       ALLOCATED

whois:        whois.lacnic.net

changed:      2007-09
source:       IANA

### Registry response (whois.lacnic.net)

% IP Client: 54.36.98.133
 % Copyright (c) Nic.br - Use of this data is governed by the Use and
% Privacy Policy at https://registro.br/upp . Distribution,
% commercialization, reproduction, and use for advertising or similar
% purposes are expressly prohibited.
% 2026-03-26T14:58:19-03:00 - 54.36.98.133

inetnum:     186.238.0.0/15
aut-num:     AS10429
abuse-c:     CSTBR
owner:       TELEF�NICA BRASIL S.A
ownerid:     02.558.157/0001-62
responsible: Diretoria de Planejamento e Tecnologia
owner-c:     ARITE
tech-c:      GRP95
inetrev:     186.238.18.0/24
nserver:     te-br-spo-tic-dns1.tdatabrasil.net.br
nsstat:      20260323 AA
nslastaa:    20260323
nserver:     te-br-spo-ib-dns2.tdatabrasil.net.br
nsstat:      20260323 AA
nslastaa:    20260323
created:     20100916
changed:     20190410

nic-hdl-br:  ARITE
person:      Administra��o Rede IP Telesp
created:     20080407
changed:     20230629

nic-hdl-br:  CSTBR
person:      CSIRT TELEFONICA BR
created:     20180713
changed:     20180713

nic-hdl-br:  GRP95
person:      Grupo Provisionamento
created:     20031027
changed:     20231107

% Security and mail abuse issues should also be addressed to cert.br,
% respectivelly to cert@cert.br and mail-abuse@cert.br
%
% whois.registro.br only accepts exact match queries for domains,
% registrants, contacts, tickets, providers, IPs, and ASNs.

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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