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WHOIS

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

Query
72.250.129.197
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:      72.0.0.0 - 72.255.255.255
organisation: ARIN
status:       ALLOCATED

whois:        whois.arin.net

changed:      2004-08
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 72.250.129.197"
#
# Use "?" to get help.
#

NetRange:       72.250.128.0 - 72.250.159.255
CIDR:           72.250.128.0/19
NetName:        EXPANSION2
NetHandle:      NET-72-250-128-0-1
Parent:         NET72 (NET-72-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   Mid-Rivers Telephone Cooperative, Inc. (MDRV)
RegDate:        2006-09-15
Updated:        2012-03-20
Ref:            https://rdap.arin.net/registry/ip/72.250.128.0


OrgName:        Mid-Rivers Telephone Cooperative, Inc.
OrgId:          MDRV
Address:        PO Box 280
Address:        904 C Ave
City:           Circle
StateProv:      MT
PostalCode:     59215
Country:        US
RegDate:        1998-01-02
Updated:        2024-10-22
Ref:            https://rdap.arin.net/registry/entity/MDRV


OrgNOCHandle: MIA30-ARIN
OrgNOCName:   Mid-Rivers Internet Abuse
OrgNOCPhone:  +1-800-452-2288 
OrgNOCEmail:  abuse@midrivers.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/MIA30-ARIN

OrgAbuseHandle: MIA30-ARIN
OrgAbuseName:   Mid-Rivers Internet Abuse
OrgAbusePhone:  +1-800-452-2288 
OrgAbuseEmail:  abuse@midrivers.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MIA30-ARIN

OrgTechHandle: MNE112-ARIN
OrgTechName:   MRTC Network Engineers
OrgTechPhone:  +1-800-452-2288 
OrgTechEmail:  nse@midrivers.coop
OrgTechRef:    https://rdap.arin.net/registry/entity/MNE112-ARIN

OrgRoutingHandle: MNE112-ARIN
OrgRoutingName:   MRTC Network Engineers
OrgRoutingPhone:  +1-800-452-2288 
OrgRoutingEmail:  nse@midrivers.coop
OrgRoutingRef:    https://rdap.arin.net/registry/entity/MNE112-ARIN

OrgNOCHandle: MNE112-ARIN
OrgNOCName:   MRTC Network Engineers
OrgNOCPhone:  +1-800-452-2288 
OrgNOCEmail:  nse@midrivers.coop
OrgNOCRef:    https://rdap.arin.net/registry/entity/MNE112-ARIN

RAbuseHandle: BQ108-ARIN
RAbuseName:   Quick, Brad 
RAbusePhone:  +1-406-485-3301 
RAbuseEmail:  Ryan.Dick@midrivers.coop
RAbuseRef:    https://rdap.arin.net/registry/entity/BQ108-ARIN

RNOCHandle: BQ108-ARIN
RNOCName:   Quick, Brad 
RNOCPhone:  +1-406-485-3301 
RNOCEmail:  Ryan.Dick@midrivers.coop
RNOCRef:    https://rdap.arin.net/registry/entity/BQ108-ARIN

RTechHandle: BQ108-ARIN
RTechName:   Quick, Brad 
RTechPhone:  +1-406-485-3301 
RTechEmail:  Ryan.Dick@midrivers.coop
RTechRef:    https://rdap.arin.net/registry/entity/BQ108-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.
#

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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