Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 20 years ago · on AboutUs since 2013 · one registrar since Mar 21, 2010 · no registrant change on record since 2010 · last checked Oct 3, 2026.
Registration
RegisteredJan 26, 2006abacus.coop was registered on Jan 26, 2006.Source: RDAP, fetched Oct 3, 2026
AboutUs record
AboutUs wiki pageDec 15, 2013An AboutUs wiki page described abacus.coop from Dec 15, 2013 to Dec 15, 2013 (1 edit).Source: AboutUs wiki archive, 2006–2023Current AboutUs recordJul 18, 2026 – Oct 3, 2026 (latest)
Registrar
Domains.coop LimitedDomains.coop LimitedMar 21, 2010 – Oct 1, 2026 (latest)Registrar Domains.coop Limited (IANA 465) in the registration data recorded, first on Mar 21, 2010 and most recently on Oct 1, 2026.Source: RDAP, fetched Oct 3, 2026
Registrant
Registrant recordsMar 21, 2010 – Apr 29, 2026Registration records for abacus.coop are held from Mar 21, 2010 to Apr 29, 2026 (69 records). None shows a change of registrant. 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
No registrant changes recorded, 2010–2026
Zone file
No nameserver records held, Mar 2016 – Dec 2016No nameserver records held, May 2018 – Dec 2019Nameservers: domains.coopFeb 4, 2016 – Mar 29, 2016domains.coop (ns1.europe.domains.coop, ns2.europe.domains.coop, ns3.europe.domains.coop…) were the nameservers listed for abacus.coop at every ICANN zone-file snapshot AboutUs holds from Feb 4, 2016 to Mar 29, 2016 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Certificate
DigiCert IncDigiCert IncNov 6, 2025 – Nov 15, 2026DigiCert Inc issued 2 certificates for abacus.coop from Nov 6, 2025, the latest valid until May 12, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)Let's Encrypt
2010201520202025Apr ’26← last 12 months, drawn wider
Every dated fact on this lifeline (17)
Jan 26, 2006Registration: abacus.coop was registered on Jan 26, 2006.Source: RDAP, fetched Oct 3, 2026
Mar 21, 2010 – Oct 1, 2026Registrar: Registrar Domains.coop Limited (IANA 465) in the registration data recorded, first on Mar 21, 2010 and most recently on Oct 1, 2026.Source: RDAP, fetched Oct 3, 2026
Mar 21, 2010 – Apr 29, 2026Registrant: Registration records for abacus.coop are held from Mar 21, 2010 to Apr 29, 2026 (69 records). None shows a change of registrant. 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
Dec 15, 2013AboutUs record: An AboutUs wiki page described abacus.coop from Dec 15, 2013 to Dec 15, 2013 (1 edit).Source: AboutUs wiki archive, 2006–2023
Feb 4, 2016 – Mar 29, 2016Zone file: domains.coop (ns1.europe.domains.coop, ns2.europe.domains.coop, ns3.europe.domains.coop…) were the nameservers listed for abacus.coop at every ICANN zone-file snapshot AboutUs holds from Feb 4, 2016 to Mar 29, 2016 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Automated safety checks
DNS (passed)
HTTPS (failed)
Make sure the site responds over HTTPS with a valid certificate.
AboutUs has not vetted this site. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.
Current facts
Latest available measurements; dated entries retain their dates. These are measurements, not an endorsement of the site.
latest result
Domain registered Jan 26, 2006 — 20 years old.
latest result
Registrar on record: Domains.coop Limited — unchanged since AboutUs began tracking (Oct 1, 2026).
Trust record
Authority and Safety last refreshed Oct 3, 2026.
Source: AboutUs checks
Nameservers: domains.coopDec 9, 2016 – May 16, 2018Registration records listed domains.coop nameservers (ns1.europe.domains.coop, ns2.europe.domains.coop, ns3.europe.domains.coop…) for abacus.coop from Dec 9, 2016 to May 16, 2018.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: hostcontrol.com, hostcontrol.orgDec 16, 2019 – Jun 21, 2020Registration records listed hostcontrol.com, hostcontrol.org nameservers (ns01.hostcontrol.com, ns02.hostcontrol.com, ns03.hostcontrol.org) for abacus.coop from Dec 16, 2019 to Jun 21, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to hostcontrol.com, hostcontrol.orgDec 16, 2019abacus.coop's nameservers moved from domains.coop to hostcontrol.com, hostcontrol.org at some point between May 16, 2018 and Dec 16, 2019. Last seen at domains.coop: May 16, 2018 (registration record). First seen at hostcontrol.com, hostcontrol.org: Dec 16, 2019 (registration record). AboutUs holds no nameserver records for the 19 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: yoursrs.comNameservers: yoursrs.comNov 18, 2020 – Apr 29, 2026Registration records listed yoursrs.com nameservers (ns1.yoursrs.com, ns2.yoursrs.com) for abacus.coop from Nov 18, 2020 to Apr 29, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to yoursrs.comNov 18, 2020abacus.coop's nameservers moved from hostcontrol.com, hostcontrol.org to yoursrs.com at some point between Jun 21, 2020 and Nov 18, 2020. Last seen at hostcontrol.com, hostcontrol.org: Jun 21, 2020 (registration record). First seen at yoursrs.com: Nov 18, 2020 (registration record). AboutUs holds no nameserver records for the 5 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)
Seen in the .coop zone fileJul 28, 2026 – Jul 29, 2026 (latest)First seen in the .coop zone file records AboutUs holds on Jul 28, 2026; latest sighting Jul 29, 2026.Source: ICANN CZDS zone file
May 9, 2026 – Nov 15, 2026
Let's Encrypt issued 141 certificates for abacus.coop from May 9, 2026, the latest valid until Feb 10, 2027.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Google Trust ServicesMay 15, 2026 – Nov 15, 2026Google Trust Services issued 57 certificates for abacus.coop from May 15, 2026, the latest valid until Feb 6, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Sectigo LimitedSep 1, 2026 – Nov 15, 2026Sectigo Limited issued 1 certificate for abacus.coop from Sep 1, 2026, the latest valid until Mar 18, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
ZeroSSL GmbHOct 8, 2026 – Nov 15, 2026ZeroSSL GmbH issued 1 certificate for abacus.coop from Oct 8, 2026, the latest valid until Jan 6, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Dec 9, 2016 – May 16, 2018
Zone file: Registration records listed domains.coop nameservers (ns1.europe.domains.coop, ns2.europe.domains.coop, ns3.europe.domains.coop…) for abacus.coop from Dec 9, 2016 to May 16, 2018.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 16, 2019 – Jun 21, 2020Zone file: Registration records listed hostcontrol.com, hostcontrol.org nameservers (ns01.hostcontrol.com, ns02.hostcontrol.com, ns03.hostcontrol.org) for abacus.coop from Dec 16, 2019 to Jun 21, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 16, 2019Zone file: abacus.coop's nameservers moved from domains.coop to hostcontrol.com, hostcontrol.org at some point between May 16, 2018 and Dec 16, 2019. Last seen at domains.coop: May 16, 2018 (registration record). First seen at hostcontrol.com, hostcontrol.org: Dec 16, 2019 (registration record). AboutUs holds no nameserver records for the 19 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)
Nov 18, 2020 – Apr 29, 2026Zone file: Registration records listed yoursrs.com nameservers (ns1.yoursrs.com, ns2.yoursrs.com) for abacus.coop from Nov 18, 2020 to Apr 29, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Nov 18, 2020Zone file: abacus.coop's nameservers moved from hostcontrol.com, hostcontrol.org to yoursrs.com at some point between Jun 21, 2020 and Nov 18, 2020. Last seen at hostcontrol.com, hostcontrol.org: Jun 21, 2020 (registration record). First seen at yoursrs.com: Nov 18, 2020 (registration record). AboutUs holds no nameserver records for the 5 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)
Nov 6, 2025 – Nov 15, 2026Certificate: DigiCert Inc issued 2 certificates for abacus.coop from Nov 6, 2025, the latest valid until May 12, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
May 9, 2026 – Nov 15, 2026Certificate: Let's Encrypt issued 141 certificates for abacus.coop from May 9, 2026, the latest valid until Feb 10, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
May 15, 2026 – Nov 15, 2026Certificate: Google Trust Services issued 57 certificates for abacus.coop from May 15, 2026, the latest valid until Feb 6, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 18, 2026 – Oct 3, 2026AboutUs record: Authority and Safety last refreshed Oct 3, 2026.Source: AboutUs checks
Jul 28, 2026 – Jul 29, 2026Zone file: First seen in the .coop zone file records AboutUs holds on Jul 28, 2026; latest sighting Jul 29, 2026.Source: ICANN CZDS zone file
Sep 1, 2026 – Nov 15, 2026Certificate: Sectigo Limited issued 1 certificate for abacus.coop from Sep 1, 2026, the latest valid until Mar 18, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Oct 8, 2026 – Nov 15, 2026Certificate: ZeroSSL GmbH issued 1 certificate for abacus.coop from Oct 8, 2026, the latest valid until Jan 6, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Authority 94/100— ahead of 94% of the August 2026 scored sampleClear
Why this authority score
94 is a percentile: higher than 94% of sites we score.
How it's calculated
Prominence (Tranco rank #102,080; Open PageRank 6.0/10)+13
Verified continuity: 20.8 years (RDAP registration)+10
Security & email hygiene+3
Prominence × continuity interaction+1
Calibration adjustment (published map)+21
Model score: 48/99 — what these reason lines add up to.
Published Authority (percentile): 94/100 — 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 42 days ago); 3/3 transport and email checks available (oldest recorded about 42 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
Site history
Dated record — historical facts always carry their date.