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WHOIS lookup

Look up a domain, an IPv4 or IPv6 address or an AS number (ASN). For a domain: who registered it, which registrar holds it, when it expires and what its status codes mean. For an address or ASN: which network it belongs to, who holds it and where to report abuse. Asked over RDAP and classic WHOIS, of the registry and then the registrar.

Try github.com, bbc.co.uk, 8.8.8.8, AS13335. AS numbers work as AS13335 or plain 13335; URLs and e-mail addresses are trimmed to their domain.

198.51.45.66

IP addressHeld by IBM3 requests in 0.7 s2026-11-09 06:03:04 UTCRegistered

DNS lookupTextJSON
  • Warning The RDAP server (rdap.arin.net) didn't answer: Recv failure: Connection reset by peer.

Network

Range198.51.44.0 – 198.51.45.255
CIDR198.51.44.0/23
NameNSONE-DNS
Held byIBM
CountryUS
TypeDirect Allocation
HandleNET-198-51-44-0-1 · part of NET198 (NET-198-0-0-0-0)
Registered · 13 years, 3 months ago
Last changed · 4 months, 14 days ago
Report abuseipreg@us.ibm.com · +1-800-426-7378
RegistryARIN

Reverse DNS and more: DNS lookup for 198.51.45.66.

WHOIS

The raw replies over port 43, as the whois command shows them.

ARIN 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.
#


NetRange:       198.51.44.0 - 198.51.45.255
CIDR:           198.51.44.0/23
NetName:        NSONE-DNS
NetHandle:      NET-198-51-44-0-1
Parent:         NET198 (NET-198-0-0-0-0)
NetType:        Direct Allocation
OriginAS:       
Organization:   IBM (IBM-1)
RegDate:        2013-08-07
Updated:        2026-06-25
Ref:            https://rdap.arin.net/registry/ip/198.51.44.0


OrgName:        IBM
OrgId:          IBM-1
Address:        3039 Cornwallis Road
City:           Research Triangle Park
StateProv:      NC
PostalCode:     27709-2195
Country:        US
RegDate:        1992-02-08
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/IBM-1


OrgTechHandle: RAIN-ARIN
OrgTechName:   Registrar Authority, Internet numbers
OrgTechPhone:  +1-800-426-7378 
OrgTechEmail:  ipreg@us.ibm.com
OrgTechRef:    https://rdap.arin.net/registry/entity/RAIN-ARIN

OrgAbuseHandle: RAIN-ARIN
OrgAbuseName:   Registrar Authority, Internet numbers
OrgAbusePhone:  +1-800-426-7378 
OrgAbuseEmail:  ipreg@us.ibm.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/RAIN-ARIN

RTechHandle: NSONE-ARIN
RTechName:   NSONE-TECH
RTechPhone:  +1-480-932-5972 
RTechEmail:  techops@nsone.net
RTechRef:    https://rdap.arin.net/registry/entity/NSONE-ARIN

RNOCHandle: NSONE-ARIN
RNOCName:   NSONE-TECH
RNOCPhone:  +1-480-932-5972 
RNOCEmail:  techops@nsone.net
RNOCRef:    https://rdap.arin.net/registry/entity/NSONE-ARIN

RAbuseHandle: NSONE-ARIN
RAbuseName:   NSONE-TECH
RAbusePhone:  +1-480-932-5972 
RAbuseEmail:  techops@nsone.net
RAbuseRef:    https://rdap.arin.net/registry/entity/NSONE-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.
#

Servers asked

ProtocolServerResultTime
RDAPhttps://rdap.arin.net/registry/ip/198.51.45.66Recv failure: Connection reset by peer287 ms
WHOISwhois.iana.org “198.51.45.66”720 bytes187 ms
WHOISwhois.arin.net “n + 198.51.45.66”2,280 bytes201 ms