Whois & RDAP Lookup
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RDAPIP Range42.51.0.0 - 42.51.255.255
Handle42.51.0.0 - 42.51.255.255
NameCNISP-UNION
TypeALLOCATED PORTABLE
CountryCN
Registered2011-01-31 01:14 UTC
Updated2023-11-28 00:57 UTC
Admin ContactDong Yinliang
Email[email protected]
Phone+86-10-82893336
AddressRm503, Building D, No.2 Xinxi Road, Haidian, China
Tech ContactWang Fei
Email[email protected]
Phone+86-10-82893336
AddressRm503, Building D, No.2 Xinxi Road, Haidian, China
Abuse Contact[email protected]
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 '42.51.0.0 - 42.51.127.255' % Abuse contact for '42.51.0.0 - 42.51.127.255' is '[email protected]' inetnum: 42.51.0.0 - 42.51.127.255 netname: HTU-NET descr: Henan Telcom Union Technology Co., LTD descr: 73, 18 Buliding, 93 Jingsan Road, descr: Zhengzhou City,Henan,China country: CN admin-c: QW703-AP tech-c: LW2337-AP abuse-c: AC1910-AP status: ALLOCATED NON-PORTABLE mnt-by: MAINT-AP-CNISP mnt-irt: IRT-CNISP-CN last-modified: 2021-02-17T13:08:45Z source: APNIC irt: IRT-CNISP-CN address: Beijing CNISP Technology Co., Ltd e-mail: [email protected] abuse-mailbox: [email protected] admin-c: CM2275-AP tech-c: CM2275-AP auth: # Filtered remarks: [email protected] was validated on 2025-12-08 mnt-by: MAINT-AP-CNISP last-modified: 2025-12-08T03:11:27Z source: APNIC role: ABUSE CNISPCN country: ZZ address: Beijing CNISP Technology Co., Ltd phone: +000000000 e-mail: [email protected] admin-c: CM2275-AP tech-c: CM2275-AP nic-hdl: AC1910-AP remarks: Generated from irt object IRT-CNISP-CN remarks: [email protected] was validated on 2025-12-08 abuse-mailbox: [email protected] mnt-by: APNIC-ABUSE last-modified: 2025-12-08T03:11:48Z source: APNIC person: Liu Wei nic-hdl: LW2337-AP e-mail: [email protected] address: 73, 18 Buliding, 93 Jingsan Road, phone: +86-371-55056677 country: CN mnt-by: MAINT-NEW last-modified: 2013-08-02T03:06:29Z source: APNIC person: Qingsong Wang nic-hdl: QW703-AP e-mail: [email protected] address: 73, 18 Buliding, 93 Jingsan Road, phone: +86-371-55056677 country: CN mnt-by: MAINT-NEW last-modified: 2013-08-02T03:06:28Z source: APNIC % Information related to '42.51.0.0/17AS4837' route: 42.51.0.0/17 descr: China Unicom Henan Province network descr: Addresses from CNNIC country: CN origin: AS4837 mnt-by: MAINT-CNCGROUP-RR last-modified: 2012-08-07T07:18:02Z source: APNIC % This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-SG1) % Query time: 426 msec % WHEN: Sat Aug 15 23:15:04 UTC 2026
Raw RDAP JSON (registry) https://rdap.apnic.net
{
"cidr0_cidrs": [
{
"length": 16,
"v4prefix": "42.51.0.0"
}
],
"country": "CN",
"endAddress": "42.51.255.255",
"entities": [
{
"events": [
{
"eventAction": "registration",
"eventDate": "2013-07-30T03:12:01Z"
},
{
"eventAction": "last changed",
"eventDate": "2019-08-22T02:41:04Z"
}
],
"handle": "WF703-AP",
"links": [
{
"href": "https://rdap.apnic.net/entity/WF703-AP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/42.51.0.0/16"
}
],
"objectClassName": "entity",
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Wang Fei"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "Rm503, Building D, No.2 Xinxi Road, Haidian, China"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+86-10-82893336"
],
[
"tel",
{
"type": "fax"
},
"text",
"+86-10-82893337"
],
[
"email",
{},
"text",
"[email protected]"
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2021-06-29T08:49:56Z"
},
{
"eventAction": "last changed",
"eventDate": "2025-11-18T00:34:43Z"
}
],
"handle": "IRT-CNISP-UNION-CN",
"links": [
{
"href": "https://rdap.apnic.net/entity/IRT-CNISP-UNION-CN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/42.51.0.0/16"
}
],
"objectClassName": "entity",
"roles": [
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"IRT-CNISP-UNION-CN"
],
[
"kind",
{},
"text",
"group"
],
[
"adr",
{
"label": "Rm503, Building D, No.2 Xinxi Road, Haidian, China"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"email",
{},
"text",
"[email protected]"
],
[
"email",
{
"pref": "1"
},
"text",
"[email protected]"
]
]
]
},
{
"events": [
{
"eventAction": "registration",
"eventDate": "2013-07-30T03:12:01Z"
},
{
"eventAction": "last changed",
"eventDate": "2019-09-03T00:50:44Z"
}
],
"handle": "DY857-AP",
"links": [
{
"href": "https://rdap.apnic.net/entity/DY857-AP",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/42.51.0.0/16"
}
],
"objectClassName": "entity",
"roles": [
"administrative"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Dong Yinliang"
],
[
"kind",
{},
"text",
"individual"
],
[
"adr",
{
"label": "Rm503, Building D, No.2 Xinxi Road, Haidian, China"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"tel",
{
"type": "voice"
},
"text",
"+86-10-82893336"
],
[
"tel",
{
"type": "fax"
},
"text",
"+86-10-82893337"
],
[
"email",
{},
"text",
"[email protected]"
]
]
]
}
],
"events": [
{
"eventAction": "registration",
"eventDate": "2011-01-31T01:14:58Z"
},
{
"eventAction": "last changed",
"eventDate": "2023-11-28T00:57:54Z"
}
],
"handle": "42.51.0.0 - 42.51.255.255",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.apnic.net/ip/42.51.0.0/16",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.apnic.net/ip/42.51.0.0/16"
}
],
"name": "CNISP-UNION",
"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/42.51.0.0/16"
}
],
"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/42.51.0.0/16"
}
],
"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": [
"CNISP-Union Technology (Beijing) Co., Ltd",
"Room 503, Building D,",
"No.2 Shangdi Xinxi Road Pioneering Park,",
"Haidian District, Beijing, 100085, P.R.China"
],
"title": "description"
}
],
"startAddress": "42.51.0.0",
"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.