WHOIS

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

Query

66.193.38.100

IANA

whois.iana.org

Referred

whois.arin.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.arin.net

inetnum:      66.0.0.0 - 66.255.255.255
organisation: ARIN
status:       ALLOCATED

whois:        whois.arin.net

changed:      2000-07
source:       IANA

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

#
# 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 66.193.38.100"
#
# Use "?" to get help.
#

Level 3 Parent, LLC TWTC-NETBLK-4 (NET-66-192-0-0-1) 66.192.0.0 - 66.195.255.255
US Digital LVLT-66-193-38-24 (NET-66-193-38-0-1) 66.193.38.0 - 66.193.38.255



#
# 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.
#