Whois & RDAP Lookup
V.PS Cloud KVM VPS for developers KVM VPS · 11 PoPs · 99.9% SLA Simple VPS, premium network · Pick a PoP, deploy in seconds 11 PoPs · APAC, Europe, North America Tier 1 upstreams Premium network · Low-latency routes Free 24×7 support €6.95/mo Deploy a serverDeploy211.71.57.173
IP Geolocation RDAPIP Range211.70.0.0 - 211.71.255.255
Handle211.70.0.0 - 211.71.255.255
NameCERNET
TypeALLOCATED PORTABLE
CountryCN
Registered2008-09-04 06:49 UTC
Updated2020-10-20 00:56 UTC
Admin ContactJianping Wu
Email[email protected]
Phone+86-10-6278-5983
AddressChina Education and Research Network Center, Room 225, Main Building, Tsinghua University, Beijing 100084, CN
Tech ContactLing Zhang
Email[email protected]
Phone+86-20-87110596
AddressNetwork Center, South China University of Technology, Guangzhou, Guangdong 510641, China, CN
Abuse Contact[email protected]
Abuse Phone+86-10-62784301
Statusactive
Registry RDAPhttps://rdap.apnic.net
Raw WHOIS response
% [whois.apnic.net] % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html % Information related to '211.70.0.0 - 211.71.255.255' % Abuse contact for '211.70.0.0 - 211.71.255.255' is '[email protected]' inetnum: 211.70.0.0 - 211.71.255.255 netname: CERNET descr: China Education and Research Network descr: Room 224, Tsinghua University descr: Beijing, China country: CN admin-c: JW1-CN tech-c: XL1-CN tech-c: LZ1-CN abuse-c: AC1685-AP status: ALLOCATED PORTABLE remarks: APNIC Very Large member, confederation mnt-by: APNIC-HM mnt-lower: MAINT-CERNET-AP mnt-routes: MAINT-CERNET-AP mnt-irt: IRT-CERNET-AP last-modified: 2020-10-20T00:56:10Z source: APNIC irt: IRT-CERNET-AP address: Network Center, address: FIT-3-220, Tsinghua Univ address: Beijing 100084, China phone: +86-10-62784301 fax-no: +86-10-62785933 e-mail: [email protected] abuse-mailbox: [email protected] admin-c: CER-AP tech-c: CER-AP auth: # Filtered remarks: timezone GMT+8 remarks: [email protected] was validated on 2026-09-10 mnt-by: MAINT-CERNET-AP last-modified: 2026-09-10T07:51:56Z source: APNIC role: ABUSE CERNETAP country: ZZ address: Network Center, address: FIT-3-220, Tsinghua Univ address: Beijing 100084, China phone: +86-10-62784301 e-mail: [email protected] admin-c: CER-AP tech-c: CER-AP nic-hdl: AC1685-AP remarks: Generated from irt object IRT-CERNET-AP remarks: [email protected] was validated on 2026-09-10 abuse-mailbox: [email protected] mnt-by: APNIC-ABUSE last-modified: 2026-09-10T07:52:32Z source: APNIC person: Jianping Wu address: China Education and Research Network Center address: Room 225, Main Building, Tsinghua University address: Beijing 100084 address: CN country: CN phone: +86-10-6278-5983 fax-no: +86-10-6278-5933 e-mail: [email protected] nic-hdl: JW1-CN mnt-by: MAINT-CERNET-AP last-modified: 2011-12-22T05:14:25Z source: APNIC person: Ling Zhang address: Network Center address: South China University of Technology address: Guangzhou, Guangdong 510641, China address: CN country: CN phone: +86-20-87110596 fax-no: +86-20-87110019 e-mail: [email protected] nic-hdl: LZ1-CN notify: [email protected] mnt-by: MAINT-NULL last-modified: 2011-12-22T05:14:25Z source: APNIC person: Xing Li address: China Education and Research Network Center address: Room 225, Main Building, Tsinghua University address: Beijing 100084 address: CN country: CN phone: +86-10-6278-5983 fax-no: +86-10-6278-5933 e-mail: [email protected] nic-hdl: XL1-CN mnt-by: MAINT-CERNET-AP last-modified: 2011-12-22T05:14:25Z source: APNIC % Information related to '211.70.0.0/15AS4538' route: 211.70.0.0/15 descr: CERNET origin: AS4538 mnt-by: MAINT-CERNET-AP last-modified: 2026-06-17T08:11:57Z source: APNIC % This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-JP1) % Query time: 494 msec % WHEN: Tue Sep 15 18:18:30 UTC 2026
Raw RDAP JSON (registry) https://rdap.apnic.net
{
"cidr0_cidrs": [
{
"length": 15,
"v4prefix": "211.70.0.0"
}
],
"country": "CN",
"endAddress": "211.71.255.255",
"entities": [
{
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T07:29:13Z"
},
{
"eventAction": "last changed",
"eventDate": "2011-12-22T05:14:25Z"
}
],
"handle": "LZ1-CN",
"links": [
{
"href": "https://rdap.apnic.net/entity/LZ1-CN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/211.71.57.173"
}
],
"objectClassName": "entity",
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Ling Zhang"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "Network Center\nSouth China University of Technology\nGuangzhou, Guangdong 510641, China\nCN"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+86-20-87110596"
],
[
"tel",
{
"type": "fax"
},
"text",
"+86-20-87110019"
],
[
"email",
{},
"text",
"[email protected]"
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T07:29:13Z"
},
{
"eventAction": "last changed",
"eventDate": "2011-12-22T05:14:25Z"
}
],
"handle": "JW1-CN",
"links": [
{
"href": "https://rdap.apnic.net/entity/JW1-CN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/211.71.57.173"
}
],
"objectClassName": "entity",
"roles": [
"administrative"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Jianping Wu"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "China Education and Research Network Center\nRoom 225, Main Building, Tsinghua University\nBeijing 100084\nCN"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+86-10-6278-5983"
],
[
"tel",
{
"type": "fax"
},
"text",
"+86-10-6278-5933"
],
[
"email",
{},
"text",
"[email protected]"
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T07:29:13Z"
},
{
"eventAction": "last changed",
"eventDate": "2011-12-22T05:14:25Z"
}
],
"handle": "XL1-CN",
"links": [
{
"href": "https://rdap.apnic.net/entity/XL1-CN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/211.71.57.173"
}
],
"objectClassName": "entity",
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Xing Li"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "China Education and Research Network Center\nRoom 225, Main Building, Tsinghua University\nBeijing 100084\nCN"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+86-10-6278-5983"
],
[
"tel",
{
"type": "fax"
},
"text",
"+86-10-6278-5933"
],
[
"email",
{},
"text",
"[email protected]"
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2010-11-26T03:14:01Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-09-10T07:51:56Z"
}
],
"handle": "IRT-CERNET-AP",
"links": [
{
"href": "https://rdap.apnic.net/entity/IRT-CERNET-AP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/211.71.57.173"
}
],
"objectClassName": "entity",
"remarks": [
{
"description": [
"timezone GMT+8",
"[email protected] was validated on 2026-09-10"
],
"title": "remarks"
}
],
"roles": [
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"IRT-CERNET-AP"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "Network Center,\nFIT-3-220, Tsinghua Univ\nBeijing 100084, China"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+86-10-62784301"
],
[
"tel",
{
"type": "fax"
},
"text",
"+86-10-62785933"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{
"pref": "1"
},
"text",
"[email protected]"
]
]
]
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "2008-09-04T06:49:40Z"
},
{
"eventAction": "last changed",
"eventDate": "2020-10-20T00:56:10Z"
}
],
"handle": "211.70.0.0 - 211.71.255.255",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.apnic.net/ip/211.70.0.0/15",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/211.71.57.173"
}
],
"name": "CERNET",
"notices": [
{
"description": [
"Objects returned came from source",
"APNIC"
],
"title": "Source"
},
{
"description": [
"This is the APNIC WHOIS Database query service. The objects are in RDAP format."
],
"links": [
{
"href": "http://www.apnic.net/db/dbcopyright.html",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.apnic.net/ip/211.71.57.173"
}
],
"title": "Terms and Conditions"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.apnic.net/manage-ip/using-whois/abuse-and-spamming/invalid-contact-form",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.apnic.net/ip/211.71.57.173"
}
],
"title": "Whois Inaccuracy Reporting"
}
],
"objectClassName": "ip network",
"port43": "whois.apnic.net",
"rdapConformance": [
"history_version_0",
"nro_rdap_profile_0",
"cidr0",
"rdap_level_0"
],
"remarks": [
{
"description": [
"China Education and Research Network",
"Room 224, Tsinghua University",
"Beijing, China"
],
"title": "description"
},
{
"description": [
"APNIC Very Large member, confederation"
],
"title": "remarks"
}
],
"startAddress": "211.70.0.0",
"status": [
"active"
],
"type": "ALLOCATED PORTABLE"
}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.