sdb.ac.cn is not available!

  • No website
  • 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
  • ok
DNSSEC
Not signed
Checked
Visit sdb.ac.cn

Website

Answer
No answer in time

DNS records

sdb.ac.cn

A
TTL 1 hour
MX
TTL 2 hours
NS
TTL 2 hours
SOA
  • Primary server
    ns.sdb.ac.cn
    Contact
    [email protected]
    Serial
    2015032610
    Refresh
    3 hours
    Retry
    1 hour
    Expire
    1 hour
    Negative TTL
    2 hours
TTL 2 hours
CAA
None: any certificate authority may issue for this name

www.sdb.ac.cn

A
TTL 2 hours

As 159.226.18.13 answers them

Reputation

Domain blocklists

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

Rankings

4,437,860 Tranco rank up from 4,468,345 on 2026-10-22
0.74Open PageRank, out of 10
9,473,071Open PageRank position
4Referring domains

From Tranco and Open PageRank

WHOIS

Domain Name: sdb.ac.cn
ROID: 20021209s10071s00001479-cn
Domain Status: ok
Registrant: 中国科学院计算机网络信息中心
Registrant Contact Email: dongchao@cnic.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: 1997-09-02 00:00:00
Expiration Time: 2028-09-02 00:00:00
DNSSEC: unsigned

DNSSEC

sdb.ac.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

ac.cn Verified

  • Found 1 DS records for ac.cn in the cn zone
  • DS=45007/SHA-256 has algorithm RSASHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=27768 and DNSKEY=27768 verifies the DS RRset
  • Found 2 DNSKEY records for ac.cn
  • DS=45007/SHA-256 verifies DNSKEY=45007/SEP
  • Found 2 RRSIGs over DNSKEY RRset
  • RRSIG=64704 over the DNSKEY RRset was made with a key that is not trusted here
  • RRSIG=45007 and DNSKEY=45007/SEP verifies the DNSKEY RRset

sdb.ac.cn Not signed

  • No DS records found for sdb.ac.cn in the ac.cn zone