Whois & RDAP Lookup
163.181.32.0/21
RDAPRaw WHOIS response
% [whois.apnic.net] % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html % Information related to '163.0.0.0 - 163.255.255.255' % Abuse contact for '163.0.0.0 - 163.255.255.255' is '[email protected]' inetnum: 163.0.0.0 - 163.255.255.255 netname: ERX-NETBLOCK descr: Early registration addresses country: AU admin-c: IANA1-AP tech-c: IANA1-AP abuse-c: AA1452-AP status: ALLOCATED PORTABLE remarks: ------------------------------------------------------ remarks: Important: remarks: remarks: Networks in this range were allocated by InterNIC remarks: prior to the formation of Regional Internet remarks: Registries (RIRs): AfriNIC, APNIC, ARIN, LACNIC and RIPE NCC. remarks: remarks: Address ranges from this historical space have now remarks: been transferred to the appropriate RIR database.remarks: remarks: If your search has returned this record, it means the remarks: address range is not administered by APNIC. remarks: remarks: Instead, please search one of the following databases: remarks: remarks: - AfriNIC (Africa) remarks: website: http://www.afrinic.net/ remarks: command line: whois.afrinic.net remarks: remarks: - ARIN (Northern America) remarks: website: http://www.arin.net/ remarks: command line: whois.arin.net remarks: remarks: - LACNIC (Latin America and the Carribean) remarks: website: http://www.lacnic.net/ remarks: command line: whois.lacnic.net remarks: remarks: - RIPE NCC (Europe) remarks: website: http://www.ripe.net/ remarks: command line: whois.ripe.net remarks: remarks: For information on the Early Registration Transfer remarks: (ERX) project, see: remarks: remarks: http://www.apnic.net/db/erx remarks: remarks: ------------------------------------------------------ mnt-by: APNIC-HM mnt-lower: APNIC-HM mnt-irt: IRT-APNIC-AP last-modified: 2021-04-16T06:53:35Z source: APNIC irt: IRT-APNIC-AP address: Brisbane, Australia e-mail: [email protected] abuse-mailbox: [email protected] admin-c: HM20-AP tech-c: NO4-AP remarks: APNIC is a Regional Internet Registry. remarks: We do not operate the referring network and remarks: are unable to investigate complaints of network abuse. remarks: For information about IRT, see www.apnic.net/irt remarks: [email protected] was validated on 2020-02-03 auth: # Filtered mnt-by: APNIC-HM last-modified: 2025-11-18T00:26:21Z source: APNIC role: ABUSE APNICAP country: ZZ address: Brisbane, Australia phone: +000000000 e-mail: [email protected] admin-c: HM20-AP tech-c: NO4-AP nic-hdl: AA1452-AP remarks: Generated from irt object IRT-APNIC-AP remarks: [email protected] was validated on 2020-02-03 abuse-mailbox: [email protected] mnt-by: APNIC-ABUSE last-modified: 2025-11-28T01:00:58Z source: APNIC role: Internet Assigned Numbers Authority address: see http://www.iana.org. admin-c: IANA1-AP tech-c: IANA1-AP nic-hdl: IANA1-AP remarks: For more information on IANA services remarks: go to IANA web site at http://www.iana.org. mnt-by: MAINT-APNIC-AP last-modified: 2018-06-22T22:34:30Z source: APNIC % This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-SG1) % Query time: 563 msec % WHEN: Wed Aug 26 10:40:37 UTC 2026
Raw RDAP JSON (registry) https://rdap.apnic.net
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"length": 16,
"v4prefix": "163.181.0.0"
}
],
"endAddress": "163.181.255.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-05-10T22:05:32-04:00"
},
{
"eventAction": "registration",
"eventDate": "2010-11-18T03:05:02-05:00"
}
],
"handle": "NETWO4028-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NETWO4028-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/163.181.32.0/21"
},
{
"href": "https://whois.arin.net/rest/poc/NETWO4028-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/163.181.32.0/21"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "400 S El Camino Real\r\nSuite 400\nSan Mateo\nCA\n94402\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Network Abuse"
],
[
"org",
{},
"text",
"Alibaba.com LLC."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-408-785-5580"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-02-09T02:02:00-05:00"
},
{
"eventAction": "registration",
"eventDate": "2014-09-26T19:03:32-04:00"
}
],
"handle": "ALIBA-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ALIBA-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/163.181.32.0/21"
},
{
"href": "https://whois.arin.net/rest/poc/ALIBA-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/163.181.32.0/21"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc",
"administrative",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "400 S El Camino Real, Suite 400\nSan Mateo\nCA\n94402\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Alibaba NOC"
],
[
"org",
{},
"text",
"Alibaba.com LLC"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-408-748-1200"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-02-11T10:30:55-05:00"
},
{
"eventAction": "registration",
"eventDate": "2010-10-29T09:45:04-04:00"
}
],
"handle": "AL-3",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/AL-3",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/163.181.32.0/21"
},
{
"href": "https://whois.arin.net/rest/org/AL-3",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/163.181.32.0/21"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"1.For AliCloud IPR Infringement and Abuse Claim, please use below link with browser to report: https://intl.aliyun.com/report\r",
"\r",
"2.For Alibaba.com and Aliexpress.com's IPR Infringement , please use below link with browser to report: https://ipp.alibabagroup.com\r",
"\r",
"3.For Alibaba.com and Aliexpress.com's Abuse, please send email to those two mail lists to report: [email protected] and [email protected]\r",
"\r",
"4. For network issue, please send email to this mail list: [email protected]"
],
"title": "Registration Comments"
}
],
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Alibaba Cloud LLC"
],
[
"adr",
{
"label": "400 S El Camino Real, Suite 400\nSan Mateo\nCA\n94402\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2021-12-14T20:28:37-05:00"
},
{
"eventAction": "registration",
"eventDate": "2016-12-13T12:19:01-05:00"
}
],
"handle": "NET-163-181-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/163.181.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/163.181.32.0/21"
},
{
"href": "https://whois.arin.net/rest/net/NET-163-181-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/163.181.32.0/21"
}
],
"name": "AL-3",
"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/163.181.32.0/21"
}
],
"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/163.181.32.0/21"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-163-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"startAddress": "163.181.0.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
}Frequently asked questions
What is WHOIS?
WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.
What is RDAP, and how does it differ?
RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.
What is the difference between a registrar and a registrant?
The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.
What are nameservers?
Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.
What is DNSSEC?
DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.
Why is the contact information redacted?
Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.