cas.cn is not available!

  • Website up
  • Not on blocklists
Registrar
北京国科云计算技术有限公司（原北京中科三方网络技术有限公司）
Registered on
Expires on
Name servers
Status
  • serverDeleteProhibited
  • serverUpdateProhibited
  • serverTransferProhibited
DNSSEC
Not signed
Checked
Visit cas.cn

Website

Answer
200 OKin 1,573 ms
Ends at
https://www.cas.cn/
Redirects
  • https://cas.cn/ (301)
  • http://www.cas.cn/ (302)
Title
中国科学院
Protocols
HTTP/1.1
Certificate
China Financial Certification Authority (CFCA OV OCA) for *.cas.cn and cas.cn, valid until
www
Answers itself (200 OK)

DNS records

cas.cn

A
TTL 1 hour
AAAA
TTL 1 hour
MX
TTL 1 hour
NS
TTL 1 hour
TXT
TTL 5 min
SOA
  • Primary server
    ns1.cdns.cn
    Contact
    mail@cnnic.cn
    Serial
    4652
    Refresh
    1 hour
    Retry
    10 min
    Expire
    28 days
    Negative TTL
    13 min
TTL 1 hour
CAA
None: any certificate authority may issue for this name

www.cas.cn

A
TTL 1 day
AAAA
TTL 1 day

_dmarc.cas.cn

TXT
  • v=DMARC1; p=quarantine; rua=mailto:dmarc-report@cstnet.cn; ruf=mailto:dmarc-report@cstnet.cn
TTL 1 hour

As 159.226.18.14 answers them

Reputation

Domain blocklists

  • Spamhaus DBL Not listed
  • SURBL Not listed
  • URIBL Not listed

Rankings

9,223 Tranco rank down from 9,070 on 2026-09-21
8.21Open PageRank, out of 10
5,258Open PageRank position
4,614Referring domains

From Tranco and Open PageRank

WHOIS

Domain Name: cas.cn
ROID: 20030312s10001s00042408-cn
Domain Status: serverDeleteProhibited
Domain Status: serverUpdateProhibited
Domain Status: serverTransferProhibited
Registrant: 中国科学院
Registrant Contact Email: dmluo@cashq.ac.cn
Sponsoring Registrar: 北京国科云计算技术有限公司（原北京中科三方网络技术有限公司）
Name Server: ns3.cstnet.cn
Name Server: ns4.cstnet.cn
Registration Time: 2003-03-17 12:20:05
Expiration Time: 2035-03-17 12:48:36
DNSSEC: unsigned

DNSSEC

cas.cn is not signed.

. Verified

  • Found 3 DNSKEY records for .
  • DS=20326/SHA-256 verifies DNSKEY=20326/SEP
  • DS=38696/SHA-256 verifies DNSKEY=38696/SEP
  • Found 1 RRSIGs over DNSKEY RRset
  • RRSIG=38696 and DNSKEY=38696/SEP verifies the DNSKEY RRset

cn Verified

  • Found 1 DS records for cn in the . zone
  • DS=33094/SHA-256 has algorithm RSASHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=8763 and DNSKEY=8763 verifies the DS RRset
  • Found 2 DNSKEY records for cn
  • DS=33094/SHA-256 verifies DNSKEY=33094/SEP
  • Found 2 RRSIGs over DNSKEY RRset
  • RRSIG=27768 over the DNSKEY RRset was made with a key that is not trusted here
  • RRSIG=33094 and DNSKEY=33094/SEP verifies the DNSKEY RRset

cas.cn Not signed

  • No DS records found for cas.cn in the cn zone