Verifying against the live site and live WHOIS/DNS…
Common questions
Is knmi.nl legit or a scam?
AboutUs doesn't label sites "legit" or "a scam": this page lists the dated registration, DNS, HTTPS, mail-authentication and safety checks we could verify, each with its source, so you can decide for yourself.
Who owns knmi.nl?
Nobody has completed AboutUs's owner verification for knmi.nl. That's true of most sites here — it isn't itself a warning sign.
Correct a description, link or other detail. Submissions are reviewed before publication.
Lifeline · knmi.nl over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 34 years ago · on AboutUs since 2006 · one registrar since Aug 13, 2025 · 1 registrant change since 2009 · last checked Oct 18, 2026.
Registration
RegisteredFeb 24, 1992knmi.nl was registered on Feb 24, 1992.Source: RDAP, fetched Sep 17, 2026
AboutUs record
AboutUs wiki pageAboutUs wiki pageJun 20, 2006 – Nov 6, 2013An AboutUs wiki page described knmi.nl from Jun 20, 2006 to Nov 6, 2013 (3 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006Jul 1, 2006
Registrar
SURF B.V.SURF B.V.Aug 13, 2025 – Oct 22, 2026 (latest)Registrar SURF B.V. in the registration data recorded, first on Aug 13, 2025 and most recently on Oct 22, 2026.Source: RDAP, fetched Sep 17, 2026
Registrant
Registrant recordsJan 12, 2009 – Jun 3, 2026Registration records for knmi.nl are held from Jan 12, 2009 to Jun 3, 2026 (23 records). 1 change of registrant name or organization is marked. Privacy-service and redaction changes, renames of the same organization and new contacts at it are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Zone file
Nameservers: ssc-campus.nl, surfnet.nlAug 13, 2025 – Jun 3, 2026Registration records listed ssc-campus.nl, surfnet.nl nameservers (ns1.ssc-campus.nl, ns1.surfnet.nl, ns2.ssc-campus.nl…) for knmi.nl from Aug 13, 2025 to Jun 3, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
AmazonAmazonJun 15, 2025 – Nov 4, 2026 (latest)Amazon issued 95 certificates for knmi.nl from Jun 15, 2025, the latest valid until May 20, 2027. Seen in use on Oct 18, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 18, 2026
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (11)
Feb 24, 1992Registration: knmi.nl was registered on Feb 24, 1992.Source: RDAP, fetched Sep 17, 2026
Jun 20, 2006 – Nov 6, 2013AboutUs record: An AboutUs wiki page described knmi.nl from Jun 20, 2006 to Nov 6, 2013 (3 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “Het KNMI is het nationale data- en kenniscentrum voor weer, klimaat en seismologie.”Source: AboutUs wiki archive, 2006
Jan 12, 2009 – Jun 3, 2026Registrant: Registration records for knmi.nl are held from Jan 12, 2009 to Jun 3, 2026 (23 records). 1 change of registrant name or organization is marked. Privacy-service and redaction changes, renames of the same organization and new contacts at it are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Jun 15, 2025 – Nov 4, 2026Certificate: Amazon issued 95 certificates for knmi.nl from Jun 15, 2025, the latest valid until May 20, 2027. Seen in use on Oct 18, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 18, 2026
Aug 13, 2025 – Oct 22, 2026Registrar SURF B.V. in the registration data recorded, first on Aug 13, 2025 and most recently on Oct 22, 2026.
“Het KNMI is het nationale data- en kenniscentrum voor weer, klimaat en seismologie.”
Source: AboutUs wiki archive, 2006
Current AboutUs recordJun 27, 2026 – Aug 21, 2026 (latest)Authority and Safety last refreshed Aug 21, 2026.Source: AboutUs checks
Registrant changeAug 13, 2025The registrant name or organization in the registration record changed; first recorded Aug 13, 2025. That can be a rename, a new contact or a sale; the record alone does not say which.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
1 registrant change, 2009–2026
Hellenic Academic and Research Institutions CA
Hellenic Academic and Research Institutions CASep 12, 2025 – Nov 4, 2026Hellenic Academic and Research Institutions CA issued 32 certificates for knmi.nl from Sep 12, 2025, the latest valid until Apr 2, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Let's EncryptApr 19, 2026 – Nov 4, 2026Let's Encrypt issued 6 certificates for knmi.nl from Apr 19, 2026, the latest valid until Dec 26, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Registrar:
Source: RDAP, fetched Sep 17, 2026
Aug 13, 2025Registrant: The registrant name or organization in the registration record changed; first recorded Aug 13, 2025. That can be a rename, a new contact or a sale; the record alone does not say which.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Aug 13, 2025 – Jun 3, 2026Zone file: Registration records listed ssc-campus.nl, surfnet.nl nameservers (ns1.ssc-campus.nl, ns1.surfnet.nl, ns2.ssc-campus.nl…) for knmi.nl from Aug 13, 2025 to Jun 3, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Sep 12, 2025 – Nov 4, 2026Certificate: Hellenic Academic and Research Institutions CA issued 32 certificates for knmi.nl from Sep 12, 2025, the latest valid until Apr 2, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Apr 19, 2026 – Nov 4, 2026Certificate: Let's Encrypt issued 6 certificates for knmi.nl from Apr 19, 2026, the latest valid until Dec 26, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jun 27, 2026 – Aug 21, 2026AboutUs record: Authority and Safety last refreshed Aug 21, 2026.Source: AboutUs checks
Site is live · HTTPS valid
Knmi.nl
Het KNMI is het nationale data- en kenniscentrum voor weer, klimaat en seismologie.
Authority 75/100— ahead of 75% of the August 2026 scored sampleClear
Why this authority score
75 is a percentile: higher than 75% of sites we score.
How it's calculated
Prominence (Tranco rank #22,053)+7
Verified continuity: 34.7 years (RDAP registration)+11
Identity corroboration (capped)+4
Security & email hygiene+2
Calibration adjustment (published map)+14
Model score: 38/99 — what these reason lines add up to.
Published Authority (percentile): 75/100 — this site's rank against the August 2026 scored sample. Public Authority is capped at 99.
What knmi.nl said about itself, 2006
Quoted from the site's AboutUs wiki page in each year it changed (1 version). These are the page's own words at the time, not AboutUs's assessment. New words · dropped words
2006
Het KNMI is het nationale data- en kenniscentrum voor weer, klimaat en seismologie.
Site history
Dated record — historical facts always carry their date.
2006
First tracked by AboutUs (Jun 20, 2006); profile edited 3 times through 2013.
No unexpired threat-feed result; name-similarity check available (recorded about 75 days ago); 3/3 transport and email checks available (oldest recorded about 75 days ago). This is evidence coverage, not a probability that a website is safe.
No caution flags in the available scoring observations; this is not a complete safety assessment