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Gridlode
Rank #6,874Updated November 10, 2026

knaw.nl

knaw.nl is registered with SURF B.V. since October 4, 1994 (32.1 years). Its email security grade is C. Its SSL certificate is issued by Hellenic Academic and Research Institutions CA and is valid for 31 more days.

Domain age
32.1 yrs
Technologies
—
Email security
C
SSL days left
31

Registration

RegistrarSURF B.V.
IANA ID0000
RegisteredOctober 4, 1994
UpdatedOctober 9, 2026
Statusactive
Name serversns1.surfnet.nl, ns1.zurich.surf.net, ns2.surfnet.nl, ns3.surfnet.nl
DNSSECSigned

DNS records

TypeValueTTL
A75.2.96.239300
A99.83.229.36300
MXknaw-nl.mail.protection.outlook.com 0300
NSns1.zurich.surf.net3600
NSns1.surfnet.nl3600
NSns2.surfnet.nl3600
NSns3.surfnet.nl3600
CAAiodef 0 mailto:[email protected]3600
CAAissue 0 amazonaws.com3600
CAAissue 0 harica.gr3600
CAAissue 0 letsencrypt.org3600
CAAissuewild 0 harica.gr3600
TXTHARICA-vvDQGK7pd3xxArhCoJD3600
TXTapple-domain-verification=Kx3upsCHpUwCVztU3600
TXTbw=PyPBZFeE2tQkoeBRxXYmeBuS3uLfkdcUswjyyL973iS63600
TXTprocurios-site-verification=gagUhW73NFSdoza3Vaj33600
TXThave-i-been-pwned-verification=b1fd016e7cf47b73cf71b12f8ed100033600
TXTgoogle-site-verification=94L39qL06lBH7le4wa74Yq2Me0ByOxWwLc7WdL8AA3s3600
TXTgoogle-site-verification=HfgEEpjNWwaecSYe8KnNATWfrzAExHVBlvTsuA7kGnk3600
TXTgoogle-site-verification=PA5clm1yBwUuQdkN5N0q_7xjZWXFMLR8nB2gLkVtX-A3600
TXTmCkVvXn6dUZyrFXWsGknbJGIaEbjWNeL3Rg2I92MbXPcArPmEMCPNv15sm0x65tcpO+jrI5Lt1gUi9X1EySVOw==3600
TXTadobe-idp-site-verification=e574ceb69375114ec72f4bc11ec46141ec4c1c194117b84d37a333c9a1375d043600
TXTatlassian-domain-verification=9CeGC9xO7peuiHdqk16OTwnXaYfFs3iy9LGVIXxD/OxiJfEJahXbqX7Q5jrUrqJ23600
TXTv=spf1 include:spf.protection.outlook.com include:_spf.knaw.nl include:servers.mcsv.net ip4:5.39.185.32/29 ip4:185.181.140.187 ip4:87.253.234.71 ip4:87.253.234.73 ip4:87.253.234.85 include:spam1.htx.nl include:spf.mailjet.com include:_spf-dc55.sapsf.eu include:spf.topdesk.net -all3600
AAAA2600:9000:a603:d4ab:3b46:6664:541:3b6c300
AAAA2600:9000:a715:397e:a2c2:110b:23d8:9a4f300

SSL certificate

ValidValid
IssuerGR, GEANT TLS RSA 1, Hellenic Academic and Research Institutions CA
ExpiresDecember 11, 2026
Days remaining31
ProtocolTLSv1.3
Namesknaw.nl, www.knaw.nl, acc.cms21.knaw.nl, www.acc.cms21.knaw.nl, api.knaw.nl, www.api.knaw.nl, acc.knaw.nl, www.acc.knaw.nl, acc.api.knaw.nl, www.acc.api.knaw.nl, prd.api.knaw.nl, www.prd.api.knaw.nl

Email security

CScore 79/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
  • warnSPF uses 10 of the 10 allowed DNS lookups. Adding another service may break it.
  • warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
  • warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
  • warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
  • goodSPF record found.
  • goodSPF ends with -all: servers you have not listed are rejected (hard fail).
  • goodDMARC policy is quarantine: failing mail goes to spam. Move to p=reject for full protection.
  • goodDMARC aggregate reports are sent to mailto:[email protected].
  • goodDKIM keys found (selector: selector1, selector2, k2, fm1).
  • good1 MX record(s) found. Mail is handled by Microsoft 365.

Homepage metadata

Languageen
IndexableYes
Word count0

About knaw.nl

Who is the registrar of knaw.nl?

knaw.nl is registered with SURF B.V. (IANA ID 0000).

Does knaw.nl protect its email with SPF and DMARC?

knaw.nl scores 79/100 (grade C) for email security. SPF uses 10 of the 10 allowed DNS lookups. Adding another service may break it. No MTA-STS: mail sent to you can be downgraded to an unencrypted connection.

What are the name servers of knaw.nl?

knaw.nl uses ns1.zurich.surf.net, ns1.surfnet.nl, ns2.surfnet.nl, ns3.surfnet.nl.