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.
198.51.45.1
IP addressHeld by IBM2 requests in 0.6 s2026-11-09 05:24:44 UTCRegistered
Network
| Range | 198.51.44.0 – 198.51.45.255 |
|---|---|
| CIDR | 198.51.44.0/23 |
| Name | NSONE-DNS |
| Held by | IBM IBM-1 |
| Country | US |
| Type | DIRECT ALLOCATION |
| Handle | NET-198-51-44-0-1 · part of NET-198-0-0-0-0 |
| Registered | · 13 years, 3 months ago |
| Last changed | · 4 months, 13 days ago |
| Status | active |
| Report abuse | techops@nsone.net · +1-480-932-5972;ext |
| Registry | ARIN |
Reverse DNS and more: DNS lookup for 198.51.45.1.
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. #
RDAP
The JSON replies WHOIS is being replaced by.
ARIN https://rdap.arin.net/registry/ip/198.51.45.1
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "198.51.44.0",
"length": 23
}
],
"endAddress": "198.51.45.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-23T00:40:45-04:00"
},
{
"eventAction": "registration",
"eventDate": "2006-09-07T15:24:06-04:00"
}
],
"handle": "RAIN-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/RAIN-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
},
{
"href": "https://whois.arin.net/rest/poc/RAIN-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"abuse",
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "3039 Cornwallis Road\nResearch Triangle Park\nNC\n27709-2195\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Registrar Authority, Internet numbers"
],
[
"org",
[],
"text",
"IBM"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"ipreg@us.ibm.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-800-426-7378"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2024-11-25T11:09:46-05:00"
},
{
"eventAction": "registration",
"eventDate": "1992-02-08T00:00:00-05:00"
}
],
"handle": "IBM-1",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/IBM-1",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
},
{
"href": "https://whois.arin.net/rest/org/IBM-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"IBM"
],
[
"adr",
{
"label": "3039 Cornwallis Road\nResearch Triangle Park\nNC\n27709-2195\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-29T10:41:01-04:00"
},
{
"eventAction": "registration",
"eventDate": "2015-03-24T12:07:39-04:00"
}
],
"handle": "NSONE-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NSONE-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
},
{
"href": "https://whois.arin.net/rest/poc/NSONE-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"IBM-NSONE"
],
"title": "Registration Comments"
}
],
"roles": [
"technical",
"noc",
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "55 Broad St\n19th Fl\nNew York\nNY\n10004\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"NSONE-TECH"
],
[
"org",
[],
"text",
"IBM- NSONE Inc."
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"techops@nsone.net"
],
[
"email",
[],
"text",
"ipreg@us.ibm.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-480-932-5972;ext"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-25T08:29:57-04:00"
},
{
"eventAction": "registration",
"eventDate": "2013-08-07T19:04:47-04:00"
}
],
"handle": "NET-198-51-44-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/198.51.44.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
},
{
"href": "https://whois.arin.net/rest/net/NET-198-51-44-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
}
],
"name": "NSONE-DNS",
"notices": [
{
"description": [
"By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/tou/",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
}
],
"title": "Terms of Service"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.arin.net/registry/ip/198.51.44.65"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-198-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "198.51.44.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
}Servers asked
| Protocol | Server | Result | Time |
|---|---|---|---|
| RDAP | https://rdap.arin.net/registry/ip/198.51.45.1 | HTTP 200 | 438 ms |
| WHOIS | whois.arin.net “n + 198.51.45.1” | 2,280 bytes | 182 ms |