Verifying against the live site and live WHOIS/DNS…
Common questions
Is calculatorcat.com legit or a scam?
calculatorcat.com was registered Dec 3, 2002 (23 years old), per public registration records. 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 calculatorcat.com?
Nobody has completed AboutUs's owner verification for calculatorcat.com. That's true of most sites here — it isn't itself a warning sign.
When was calculatorcat.com registered?
calculatorcat.com's registration dates to Dec 3, 2002 (23 years old), per public registration records. Cloudflare, Inc. is the registrar on record today.
Correct a description, link or other detail. Submissions are reviewed before publication.
Lifeline · calculatorcat.com over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 23 years ago · on AboutUs since 2006 · 2 registrar changes since Mar 3, 2010 · no registrant change on record since 2007 · last checked Nov 14, 2026.
Registration
RegisteredDec 3, 2002calculatorcat.com was registered on Dec 3, 2002.Source: RDAP, fetched Nov 12, 2026
AboutUs record
AboutUs wiki pageAboutUs wiki pageJun 19, 2006 – Nov 2, 2013An AboutUs wiki page described calculatorcat.com from Jun 19, 2006 to Nov 2, 2013 (3 edits).Source: AboutUs wiki archive, 2006–2023
Registrar
MONIKERMONIKERMar 3, 2010 – Jun 22, 2016Registrar MONIKER in the WHOIS and RDAP records held for calculatorcat.com, from Mar 3, 2010 to Jun 22, 2016.Source: WHOIS / RDAP archive (who.is)Moniker Online Services LLC
Registrant
Registrant recordsMay 22, 2007 – Mar 1, 2026Registration records for calculatorcat.com are held from May 22, 2007 to Mar 1, 2026 (80 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, 2007–2026
Zone file
Nameservers: bluemarmot.comNameservers: bluemarmot.comMay 22, 2007 – Oct 17, 2013Registration records listed bluemarmot.com nameservers (ns1.bluemarmot.com) for calculatorcat.com from May 22, 2007 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)
Certificate
Sectigo LimitedApr 7, 2026 – Jul 6, 2026Sectigo Limited issued 1 certificate for calculatorcat.com from Apr 7, 2026, the latest valid until Jul 6, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
20052010201520202025Apr ’26← last 12 months, drawn wider
Every dated fact on this lifeline (17)
Dec 3, 2002Registration: calculatorcat.com was registered on Dec 3, 2002.Source: RDAP, fetched Nov 12, 2026
Jun 19, 2006 – Nov 2, 2013AboutUs record: An AboutUs wiki page described calculatorcat.com from Jun 19, 2006 to Nov 2, 2013 (3 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “The following online calculators have been gathered from free scripts on the internet. They can be quite useful, but sometimes they're less than perfect -- I didn't create them or fix them up! Bugs may exist. Obviously …”Source: AboutUs wiki archive, 2006
May 22, 2007 – Mar 1, 2026Registrant: Registration records for calculatorcat.com are held from May 22, 2007 to Mar 1, 2026 (80 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
May 22, 2007 – Oct 17, 2013Zone file: Registration records listed bluemarmot.com nameservers (ns1.bluemarmot.com) for calculatorcat.com from May 22, 2007 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)
Said about itself in 2006
Jul 1, 2006
“The following online calculators have been gathered from free scripts on the internet. They can be quite useful, but sometimes they're less than perfect -- I didn't create them or fix them up! Bugs may exist. Obviously …”
Source: AboutUs wiki archive, 2006
Current AboutUs recordJun 20, 2026 – Nov 12, 2026 (latest)Authority and Safety last refreshed Nov 12, 2026.Source: AboutUs checks
Moniker Online Services LLC
Jul 2, 2016 – Sep 11, 2021
Registrar Moniker Online Services LLC (IANA 228) in the WHOIS and RDAP records held for calculatorcat.com, from Jul 2, 2016 to Sep 11, 2021.
Source: WHOIS / RDAP archive (who.is)
Cloudflare, Inc.Cloudflare, Inc.Dec 18, 2021 – Nov 14, 2026 (latest)Registrar Cloudflare, Inc. (IANA 1910) in the registration data recorded, first on Dec 18, 2021 and most recently on Nov 14, 2026.Source: RDAP, fetched Nov 12, 2026
Nameservers: bluemarmot.com
Nameservers: bluemarmot.comOct 18, 2013 – Apr 3, 2018bluemarmot.com (dns1.bluemarmot.com, dns2.bluemarmot.com) were the nameservers listed for calculatorcat.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: bluemarmot.comApr 4, 2018 – Mar 1, 2021Registration records listed bluemarmot.com nameservers (ns1.bluemarmot.com) for calculatorcat.com from Apr 4, 2018 to Mar 1, 2021. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: CloudflareNameservers: CloudflareApr 23, 2021 – Mar 1, 2026Registration records listed Cloudflare nameservers (rihana.ns.cloudflare.com, rob.ns.cloudflare.com) for calculatorcat.com from Apr 23, 2021 to Mar 1, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to CloudflareApr 23, 2021calculatorcat.com's nameservers moved from bluemarmot.com to Cloudflare at some point between Mar 1, 2021 and Apr 23, 2021. Last seen at bluemarmot.com: Mar 1, 2021 (registration record). First seen at Cloudflare: Apr 23, 2021 (registration record). AboutUs holds no nameserver records for the 53 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 14, 2026 (latest)First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Nov 14, 2026. Nameservers on Nov 14, 2026: rihana.ns.cloudflare.com, rob.ns.cloudflare.com.Source: ICANN CZDS zone file, snapshot Nov 14, 2026
Google Trust Services
Apr 25, 2026 – Nov 15, 2026 (latest)
Google Trust Services issued 6 certificates for calculatorcat.com from Apr 25, 2026, the latest valid until Jan 18, 2027. Seen in use on Oct 29, 2026.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 29, 2026
Let's EncryptJun 10, 2026 – Nov 15, 2026Let's Encrypt issued 2 certificates for calculatorcat.com from Jun 10, 2026, the latest valid until Dec 8, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Mar 3, 2010 – Jun 22, 2016
Registrar: Registrar MONIKER in the WHOIS and RDAP records held for calculatorcat.com, from Mar 3, 2010 to Jun 22, 2016.Source: WHOIS / RDAP archive (who.is)
Oct 18, 2013 – Apr 3, 2018Zone file: bluemarmot.com (dns1.bluemarmot.com, dns2.bluemarmot.com) were the nameservers listed for calculatorcat.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)
Jul 2, 2016 – Sep 11, 2021Registrar: Registrar Moniker Online Services LLC (IANA 228) in the WHOIS and RDAP records held for calculatorcat.com, from Jul 2, 2016 to Sep 11, 2021.Source: WHOIS / RDAP archive (who.is)
Apr 4, 2018 – Mar 1, 2021Zone file: Registration records listed bluemarmot.com nameservers (ns1.bluemarmot.com) for calculatorcat.com from Apr 4, 2018 to Mar 1, 2021. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Apr 23, 2021 – Mar 1, 2026Zone file: Registration records listed Cloudflare nameservers (rihana.ns.cloudflare.com, rob.ns.cloudflare.com) for calculatorcat.com from Apr 23, 2021 to Mar 1, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Apr 23, 2021Zone file: calculatorcat.com's nameservers moved from bluemarmot.com to Cloudflare at some point between Mar 1, 2021 and Apr 23, 2021. Last seen at bluemarmot.com: Mar 1, 2021 (registration record). First seen at Cloudflare: Apr 23, 2021 (registration record). AboutUs holds no nameserver records for the 53 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)
Dec 18, 2021 – Nov 14, 2026Registrar: Registrar Cloudflare, Inc. (IANA 1910) in the registration data recorded, first on Dec 18, 2021 and most recently on Nov 14, 2026.Source: RDAP, fetched Nov 12, 2026
Apr 7, 2026 – Jul 6, 2026Certificate: Sectigo Limited issued 1 certificate for calculatorcat.com from Apr 7, 2026, the latest valid until Jul 6, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Apr 25, 2026 – Nov 15, 2026Certificate: Google Trust Services issued 6 certificates for calculatorcat.com from Apr 25, 2026, the latest valid until Jan 18, 2027. Seen in use on Oct 29, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 29, 2026
Jun 10, 2026 – Nov 15, 2026Certificate: Let's Encrypt issued 2 certificates for calculatorcat.com from Jun 10, 2026, the latest valid until Dec 8, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jun 20, 2026 – Nov 12, 2026AboutUs record: Authority and Safety last refreshed Nov 12, 2026.Source: AboutUs checks
Sep 8, 2026 – Nov 14, 2026Zone file: First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Nov 14, 2026. Nameservers on Nov 14, 2026: rihana.ns.cloudflare.com, rob.ns.cloudflare.com.Source: ICANN CZDS zone file, snapshot Nov 14, 2026
3 of 4 safety checks passed (Nov 15, 2026).
Registered 2002 · site is live · HTTPS valid
CalculatorCat.com Onlinne calculators to suit any need
The following online calculators have been gathered from free scripts on the internet.
Add the HSTS, Content-Security-Policy, and X-Frame-Options response headers.
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 Dec 3, 2002 — 23 years old.
latest result
Registrar on record: Cloudflare, Inc. — unchanged since AboutUs began tracking (Aug 18, 2026).
latest result
HTTPS request succeeded for www.calculatorcat.com.
checked Sep 30, 2026
The live front page reads as a software or technology site that publishes free content supported by ads, mainly for a general audience.
Authority 59/100— ahead of 59% of the August 2026 scored sampleClear
Why this authority score
59 is a percentile: higher than 59% of sites we score.
How it's calculated
Prominence (Tranco rank #413,107)+5
Verified continuity: 24.0 years (RDAP registration)+10
Security & email hygiene+5
Calibration adjustment (published map)+11
Model score: 31/99 — what these reason lines add up to.
Published Authority (percentile): 59/100 — 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 3 days ago); 3/3 transport and email checks available (oldest recorded about 3 days ago). This is evidence coverage, not a probability that a website is safe.
What calculatorcat.com 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
The following online calculators have been gathered from free scripts on the internet. They can be quite useful, but sometimes they're less than perfect -- I didn't create them or fix them up! Bugs may exist. Obviously there are zillions of calculators on the net, both free and for-purchase, but I'll do my best to keep adding more.
Site history
Dated record — historical facts always carry their date.