Authority 57/100— ahead of 57% of the August 2026 scored sampleClear
Why this authority score
57 is a percentile: higher than 57% of sites we score.
How it's calculated
Prominence (Tranco rank #147,196)+5
Verified continuity: 31.5 years (RDAP registration)+11
Security & email hygiene+3
Calibration adjustment (published map)+11
Model score: 30/99 — what these reason lines add up to.
Published Authority (percentile): 57/100 — this site's rank against the August 2026 scored sample. Public Authority is capped at 99.
Safety evidence
No unexpired threat-feed result; name-similarity check available (recorded about 39 days ago); 3/3 transport and email checks available (oldest recorded about 39 days ago). This is evidence coverage, not a probability that a website is safe.
What fresenius.com said about itself, 2013
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
2013
Fresenius is a global health care group with products and services for dialysis, the hospital and the medical care of Fresenius Group...
Site history
Dated record — historical facts always carry their date.
✓ domain continuity 31 years registered✓ live verified Nov 13, 2026
No caution flags in the available scoring observations; this is not a complete safety assessment
Lifeline · fresenius.com over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 31 years ago · on AboutUs since 2013 · one registrar since Dec 3, 2013 · 2 registrant changes since 2007 · last checked Nov 13, 2026.
Registration
RegisteredMay 24, 1995fresenius.com was registered on May 24, 1995.Source: RDAP, fetched Oct 5, 2026
AboutUs record
AboutUs wiki pageNov 7, 2013An AboutUs wiki page described fresenius.com from Nov 7, 2013 to Nov 7, 2013 (1 edit).Source: AboutUs wiki archive, 2006–2023Said about itself in 2013Jul 1, 2013“Fresenius is a global health care group with products and services for dialysis, the hospital and the medical care of Fresenius Group...”
Registrar
COREhub, S.R.L.COREhub, S.R.L.Dec 3, 2013 – Nov 13, 2026 (latest)Registrar COREhub, S.R.L. (IANA 15) in the registration data recorded, first on Dec 3, 2013 and most recently on Nov 13, 2026.Source: RDAP, fetched Oct 5, 2026
Registrant
Registrant recordsNov 27, 2007 – Jun 6, 2026Registration records for fresenius.com are held from Nov 27, 2007 to Jun 6, 2026 (137 records). 2 changes of registrant name or organization are 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: fresenius.de, knipp.deNov 27, 2007 – Sep 2, 2009Registration records listed fresenius.de, knipp.de nameservers (ns1.fresenius.de, ns3.knipp.de) for fresenius.com from Nov 27, 2007 to Sep 2, 2009.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
Sectigo LimitedSectigo LimitedJul 28, 2025 – Nov 13, 2026Sectigo Limited issued 136 certificates for fresenius.com from Jul 28, 2025, the latest valid until May 27, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)DigiCert Inc
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (21)
May 24, 1995Registration: fresenius.com was registered on May 24, 1995.Source: RDAP, fetched Oct 5, 2026
Nov 27, 2007 – Jun 6, 2026Registrant: Registration records for fresenius.com are held from Nov 27, 2007 to Jun 6, 2026 (137 records). 2 changes of registrant name or organization are 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
Nov 27, 2007 – Sep 2, 2009Zone file: Registration records listed fresenius.de, knipp.de nameservers (ns1.fresenius.de, ns3.knipp.de) for fresenius.com from Nov 27, 2007 to Sep 2, 2009.Source: From registration records (WHOIS / RDAP archive, who.is)
Mar 24, 2008Registrant: The registrant name or organization in the registration record changed; first recorded Mar 24, 2008. 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
Mar 10, 2010 – Oct 17, 2013Zone file: Registration records listed fresenius.de, knipp.de, knipp.net nameservers (ns1.fresenius.de, ns17.knipp.net, ns3.knipp.de) for fresenius.com from Mar 10, 2010 to Oct 17, 2013. Days a zone file covers are shown from the zone file instead.
Source: AboutUs wiki archive, 2013
Current AboutUs recordJul 18, 2026 – Oct 5, 2026 (latest)Authority and Safety last refreshed Oct 5, 2026.Source: AboutUs checks
Registrant changeMar 24, 2008The registrant name or organization in the registration record changed; first recorded Mar 24, 2008. 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
Registrant changeJun 30, 2016The registrant name or organization in the registration record changed; first recorded Jun 30, 2016. 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
2 registrant changes, 2007–2026
Nameservers: fresenius.de, knipp.de, knipp.net
Mar 10, 2010 – Oct 17, 2013
Registration records listed fresenius.de, knipp.de, knipp.net nameservers (ns1.fresenius.de, ns17.knipp.net, ns3.knipp.de) for fresenius.com from Mar 10, 2010 to Oct 17, 2013. Days a zone file covers are shown from the zone file instead.
Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to fresenius.de, knipp.de, knipp.netMar 10, 2010fresenius.com's nameservers moved from fresenius.de, knipp.de to fresenius.de, knipp.de, knipp.net at some point between Sep 2, 2009 and Mar 10, 2010. Last seen at fresenius.de, knipp.de: Sep 2, 2009 (registration record). First seen at fresenius.de, knipp.de, knipp.net: Mar 10, 2010 (registration record). AboutUs holds no nameserver records for the 6 months in between, so the date of the move is not known more closely.Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: fresenius.de, knipp.de, knipp.netOct 18, 2013 – Apr 3, 2018fresenius.de, knipp.de, knipp.net (ns1.fresenius.de, ns17.knipp.net, ns3.knipp.de) were the nameservers listed for fresenius.com at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Nameservers: fresenius.de, knipp.de, knipp.netNameservers: fresenius.de, knipp.de, knipp.netApr 4, 2018 – Sep 5, 2025Registration records listed fresenius.de, knipp.de, knipp.net nameservers (ns1.fresenius.de, ns17.knipp.net, ns3.knipp.de) for fresenius.com from Apr 4, 2018 to Sep 5, 2025. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: lemarit.de, lemarit.netOct 21, 2025 – Jun 6, 2026Registration records listed lemarit.de, lemarit.net nameservers (ns1.lemarit.de, ns1.lemarit.net, ns2.lemarit.de…) for fresenius.com from Oct 21, 2025 to Jun 6, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to lemarit.de, lemarit.netOct 21, 2025fresenius.com's nameservers moved from fresenius.de, knipp.de, knipp.net to lemarit.de, lemarit.net at some point between Sep 5, 2025 and Oct 21, 2025. Last seen at fresenius.de, knipp.de, knipp.net: Sep 5, 2025 (registration record). First seen at lemarit.de, lemarit.net: Oct 21, 2025 (registration record). AboutUs holds no nameserver records for the 46 days in between, so the date of the move is not known more closely.Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Seen in the .com zone fileSep 8, 2026 – Nov 13, 2026 (latest)First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Nov 13, 2026. Nameservers on Nov 13, 2026: ns1.lemarit.de, ns1.lemarit.net, ns2.lemarit.de, ns2.lemarit.net…. DNSSEC signed on Nov 13, 2026.Source: ICANN CZDS zone file, snapshot Nov 13, 2026
DigiCert Inc
Aug 19, 2025 – Nov 13, 2026
DigiCert Inc issued 6 certificates for fresenius.com from Aug 19, 2025, the latest valid until May 14, 2027.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
AmazonAmazonAug 21, 2025 – Nov 13, 2026Amazon issued 2 certificates for fresenius.com from Aug 21, 2025, the latest valid until May 12, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
D-Trust GmbHD-Trust GmbHOct 2, 2025 – Nov 13, 2026D-Trust GmbH issued 4 certificates for fresenius.com from Oct 2, 2025, the latest valid until Jan 23, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Let's EncryptApr 2, 2026 – Nov 13, 2026Let's Encrypt issued 20 certificates for fresenius.com from Apr 2, 2026, the latest valid until Feb 7, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Source: From registration records (WHOIS / RDAP archive, who.is)
Mar 10, 2010Zone file: fresenius.com's nameservers moved from fresenius.de, knipp.de to fresenius.de, knipp.de, knipp.net at some point between Sep 2, 2009 and Mar 10, 2010. Last seen at fresenius.de, knipp.de: Sep 2, 2009 (registration record). First seen at fresenius.de, knipp.de, knipp.net: Mar 10, 2010 (registration record). AboutUs holds no nameserver records for the 6 months in between, so the date of the move is not known more closely.Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Jul 1, 2013AboutUs record: “Fresenius is a global health care group with products and services for dialysis, the hospital and the medical care of Fresenius Group...”Source: AboutUs wiki archive, 2013
Oct 18, 2013 – Apr 3, 2018Zone file: fresenius.de, knipp.de, knipp.net (ns1.fresenius.de, ns17.knipp.net, ns3.knipp.de) were the nameservers listed for fresenius.com at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Nov 7, 2013AboutUs record: An AboutUs wiki page described fresenius.com from Nov 7, 2013 to Nov 7, 2013 (1 edit).Source: AboutUs wiki archive, 2006–2023
Dec 3, 2013 – Nov 13, 2026Registrar: Registrar COREhub, S.R.L. (IANA 15) in the registration data recorded, first on Dec 3, 2013 and most recently on Nov 13, 2026.Source: RDAP, fetched Oct 5, 2026
Jun 30, 2016Registrant: The registrant name or organization in the registration record changed; first recorded Jun 30, 2016. 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
Apr 4, 2018 – Sep 5, 2025Zone file: Registration records listed fresenius.de, knipp.de, knipp.net nameservers (ns1.fresenius.de, ns17.knipp.net, ns3.knipp.de) for fresenius.com from Apr 4, 2018 to Sep 5, 2025. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Jul 28, 2025 – Nov 13, 2026Certificate: Sectigo Limited issued 136 certificates for fresenius.com from Jul 28, 2025, the latest valid until May 27, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Aug 19, 2025 – Nov 13, 2026Certificate: DigiCert Inc issued 6 certificates for fresenius.com from Aug 19, 2025, the latest valid until May 14, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Aug 21, 2025 – Nov 13, 2026Certificate: Amazon issued 2 certificates for fresenius.com from Aug 21, 2025, the latest valid until May 12, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Oct 2, 2025 – Nov 13, 2026Certificate: D-Trust GmbH issued 4 certificates for fresenius.com from Oct 2, 2025, the latest valid until Jan 23, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Oct 21, 2025 – Jun 6, 2026Zone file: Registration records listed lemarit.de, lemarit.net nameservers (ns1.lemarit.de, ns1.lemarit.net, ns2.lemarit.de…) for fresenius.com from Oct 21, 2025 to Jun 6, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Oct 21, 2025Zone file: fresenius.com's nameservers moved from fresenius.de, knipp.de, knipp.net to lemarit.de, lemarit.net at some point between Sep 5, 2025 and Oct 21, 2025. Last seen at fresenius.de, knipp.de, knipp.net: Sep 5, 2025 (registration record). First seen at lemarit.de, lemarit.net: Oct 21, 2025 (registration record). AboutUs holds no nameserver records for the 46 days in between, so the date of the move is not known more closely.Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Apr 2, 2026 – Nov 13, 2026Certificate: Let's Encrypt issued 20 certificates for fresenius.com from Apr 2, 2026, the latest valid until Feb 7, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 18, 2026 – Oct 5, 2026AboutUs record: Authority and Safety last refreshed Oct 5, 2026.Source: AboutUs checks
Sep 8, 2026 – Nov 13, 2026Zone file: First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Nov 13, 2026. Nameservers on Nov 13, 2026: ns1.lemarit.de, ns1.lemarit.net, ns2.lemarit.de, ns2.lemarit.net…. DNSSEC signed on Nov 13, 2026.Source: ICANN CZDS zone file, snapshot Nov 13, 2026