RDAP / Whois lookup

Look up authoritative registration records for a domain, IP, network prefix or ASN. Subdomains are resolved to their registrable domain automatically.

101.4.0.0 - 101.7.255.255

Record foundAPNIC

BJR-CERNETALLOCATED PORTABLE

RDAP is structured authoritative registration data. Registration records and contacts do not establish current routing, device location or network safety.

Queried at10/15/2026, 21:20:04Live registry lookup

BGP routes RPKI check Prefix profile

Resource type: Network prefix
Registry: APNIC
Registration country / region: China
Registration status: Active
Registered at: 12/9/2010, 03:45:00
Last changed: 9/3/2020, 09:16:24

Resource range101.4.0.0 – 101.7.255.255Network prefix

Resource records1CIDR count

Public contacts2Published by the registry

Registry events2Authoritative change record

Authoritative registration details

Registry handle: 101.4.0.0 - 101.7.255.255
Name: BJR-CERNET
Allocation type: ALLOCATED PORTABLE
Parent handle: Not provided by registry
Whois server: whois.apnic.net
Authoritative RDAP host: rdap.apnic.net

Address and number range

Resource range: 101.4.0.0 – 101.7.255.255
Address family: IPv4
Resource records: 1
CIDR inventory: 101.4.0.0/14

Registration entities and contacts

Only public fields from the authoritative RDAP response are shown. Roles are assigned by the registry.

2 entities

TechnicalAdministrative

CERNET HelpdeskCER-AP

helpdesk@cernet.edu.cn+86-10-6278-4049+86-10-6278-5933

CERNET Center · Beijing 100084, China

Abuse

IRT-CERNET-APIRT-CERNET-AP

abuse@cernet.edu.cn abuse@cernet.edu.cn+86-10-62784301+86-10-62785933

Network Center, · FIT-3-220, Tsinghua Univ · Beijing 100084, China

Registration and change events

2 events

Event	Time (UTC)	Actor
Last changed	9/3/2020, 09:16:24	Not provided by registry
Registration	12/9/2010, 03:45:00	Not provided by registry

Terms and remarks

Registry notices are shown verbatim so their authoritative meaning is not altered.

5 notices

descriptionChina Education and Research Network Beijing Regional Network

remarksorigin AS4538 confederation -------------------------------------------------------- To report network abuse, please contact mnt-irt For troubleshooting, please contact tech-c and admin-c Report invalid contact via www.apnic.net/invalidcontact --------------------------------------------------------

SourceObjects returned came from source APNIC

Terms and ConditionsThis is the APNIC WHOIS Database query service. The objects are in RDAP format.

Whois Inaccuracy ReportingIf you see inaccuracies in the results, please visit:

CHA.LA authoritative RDAP snapshotIANA Bootstrap only locates the responsible registration service. Data comes from the corresponding RIR or domain registry and is cached locally by query target.Authoritative source: APNIC · rdap.apnic.net