Hostname

isb.cn

Last fetched Fri, 29 May 2026 00:09:49 GMT

isb.cn resolves to 1 IPv4 address operated by CLOUDFLARENET - Cloudflare, Inc. in CA. WHOIS lists registrar:阿里云计算有限公司（万网） as the registrar.

Nutrition Label

Resolution chain

isb.cn resolves to 1 distinct IPv4 address via WhisperGraph DNS data. Each row links to the IP, prefix, and announcing ASN.

IP	Prefix	ASN	Operator	Country
104.17.67.73	104.17.64.0/20	AS13335	CLOUDFLARENET - Cloudflare, Inc.	CA

WHOIS identity

Registrar

registrar:阿里云计算有限公司（万网）

Organization

????????

Contact emails

dwang@isb.bj.edu.cn

Subdomains

30 observed subdomains of isb.cn.

Subdomain
beimun.isb.cn
survey.isb.cn
spf3.isb.cn
spf2.isb.cn
spf1.isb.cn
sis-dev.isb.cn
sis.isb.cn
reset.isb.cn
mikecdn2-survey.isb.cn
map.isb.cn
lmc.isb.cn
libguides.isb.cn
learn.isb.cn
jss.isb.cn
info.isb.cn
icthelpdesk.isb.cn
facilities.isb.cn
epad.isb.cn
ep.isb.cn
ec.isb.cn
dragongatemobile.isb.cn
cloud-s3.isb.cn
cloud-cs.isb.cn
blogs.isb.cn
blog.isb.cn

Showing 25 of 30. View all subdomains →

Web-graph footprint

Distinct hostnames that link to or from isb.cn in the public web crawl.

33 sites link to this hostname.

Sample inbound links

Sample outbound links

Threat posture

History

Mail and authentication

MX records

isb-cn.mail.protection.outlook.com

SPF policy

5 SPF mechanisms authorising senders for isb.cn.

Mechanism	Target
SPF_INCLUDE	spf.emailsignatures365.com
SPF_INCLUDE	spf.protection.outlook.com
SPF_INCLUDE	spf1.isb.cn
SPF_INCLUDE	spf2.isb.cn
SPF_INCLUDE	spf3.isb.cn

Pivot deeper into the graph from isb.cn.

Cypher and MCP

Reproduce the resolution chain directly against graph.whisper.security:

MATCH (h:HOSTNAME {name: "isb.cn"})-[:RESOLVES_TO]->(ip:IPV4)
      -[:ANNOUNCED_BY]->(ap:ANNOUNCED_PREFIX)
      -[:ROUTES]->(asn:ASN)-[:HAS_NAME]->(n:ASN_NAME)
RETURN ip.name AS ip, ap.name AS prefix, asn.name AS asn, n.name AS operator
LIMIT 20

Or query Whisper from your own LLM workflow via the Whisper MCP server.