Verifying against the live site and live WHOIS/DNS…
Common questions
Is calculator.com legit or a scam?
calculator.com was registered Jan 24, 1996 (30 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 calculator.com?
Nobody has completed AboutUs's owner verification for calculator.com. That's true of most sites here — it isn't itself a warning sign.
When was calculator.com registered?
calculator.com's registration dates to Jan 24, 1996 (30 years old), per public registration records. GoDaddy.com, LLC is the registrar on record today.
Correct a description, link or other detail. Submissions are reviewed before publication.
Lifeline · calculator.com over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 30 years ago · on AboutUs since 2006 · 1 registrar change since Jul 19, 2011 · 3 registrant changes since 2007 · last checked Nov 14, 2026.
Registration
RegisteredJan 24, 1996calculator.com was registered on Jan 24, 1996.Source: RDAP, fetched Nov 13, 2026
AboutUs record
AboutUs wiki pageAboutUs wiki pageJun 19, 2006 – Nov 2, 2013An AboutUs wiki page described calculator.com from Jun 19, 2006 to Nov 2, 2013 (6 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006Jul 1, 2006
Registrar
Network Solutions, LLCNetwork Solutions, LLCJul 19, 2011 – Apr 4, 2020Registrar Network Solutions, LLC (IANA 2) in the WHOIS and RDAP records held for calculator.com, from Jul 19, 2011 to Apr 4, 2020.Source: WHOIS / RDAP archive (who.is)GoDaddy.com, LLC
Registrant
Registrant recordsJun 3, 2007 – Jun 18, 2026Registration records for calculator.com are held from Jun 3, 2007 to Jun 18, 2026 (388 records). 3 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: calculator.comJun 3, 2007 – Dec 12, 2008Registration records listed calculator.com nameservers (ns1.calculator.com, ns2.calculator.com) for calculator.com from Jun 3, 2007 to Dec 12, 2008.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
Let's EncryptApr 9, 2026 – Nov 15, 2026Let's Encrypt issued 12 certificates for calculator.com from Apr 9, 2026, the latest valid until Feb 4, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (28)
Jan 24, 1996Registration: calculator.com was registered on Jan 24, 1996.Source: RDAP, fetched Nov 13, 2026
Jun 19, 2006 – Nov 2, 2013AboutUs record: An AboutUs wiki page described calculator.com from Jun 19, 2006 to Nov 2, 2013 (6 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “Online calculators for everything. Some solve problems, some satisfy curiosity.”Source: AboutUs wiki archive, 2006
Jun 3, 2007 – Jun 18, 2026Registrant: Registration records for calculator.com are held from Jun 3, 2007 to Jun 18, 2026 (388 records). 3 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
Jun 3, 2007 – Dec 12, 2008Zone file: Registration records listed calculator.com nameservers (ns1.calculator.com, ns2.calculator.com) for calculator.com from Jun 3, 2007 to Dec 12, 2008.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 26, 2008 – Oct 17, 2013
“Online calculators for everything. Some solve problems, some satisfy curiosity.”
Source: AboutUs wiki archive, 2006
Current AboutUs recordJun 19, 2026 – Nov 13, 2026 (latest)Authority and Safety last refreshed Nov 13, 2026.Source: AboutUs checks
GoDaddy.com, LLC
May 21, 2020 – Nov 5, 2026 (latest)
Registrar GoDaddy.com, LLC (IANA 146) in the registration data recorded, first on May 21, 2020 and most recently on Nov 5, 2026.
Source: RDAP, fetched Nov 13, 2026
Registrant changeMar 22, 2020The registrant name or organization in the registration record changed; first recorded Mar 22, 2020. 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 19, 2020The registrant name or organization in the registration record changed; first recorded Jun 19, 2020. 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 changeOct 20, 2020The registrant name or organization in the registration record changed; first recorded Oct 20, 2020. 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
3 registrant changes, 2007–2026
Nameservers: athera.com
Dec 26, 2008 – Oct 17, 2013
Registration records listed athera.com nameservers (ns1.athera.com, ns2.athera.com) for calculator.com from Dec 26, 2008 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 athera.comDec 26, 2008calculator.com's nameservers moved from calculator.com to athera.com between Dec 12, 2008 and Dec 26, 2008. Last seen at calculator.com: Dec 12, 2008 (registration record). First seen at athera.com: Dec 26, 2008 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: athera.comOct 18, 2013 – Apr 1, 2016athera.com (cloud.athera.com, ns1.athera.com, ns10.athera.com…) were the nameservers listed for calculator.com at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Apr 1, 2016 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Nameservers: athera.comApr 2, 2016 – Dec 5, 2017Registration records listed athera.com nameservers (ns1.athera.com, ns2.athera.com) for calculator.com from Apr 2, 2016 to Dec 5, 2017. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: CloudflareDec 23, 2017 – Apr 2, 2018Registration records listed Cloudflare nameservers (clark.ns.cloudflare.com, sara.ns.cloudflare.com) for calculator.com from Dec 23, 2017 to Apr 2, 2018. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to CloudflareDec 23, 2017calculator.com's nameservers moved from athera.com to Cloudflare between Dec 5, 2017 and Dec 23, 2017. Last seen at athera.com: Dec 5, 2017 (registration record). First seen at Cloudflare: Dec 23, 2017 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: CloudflareApr 3, 2018Cloudflare (clark.ns.cloudflare.com, sara.ns.cloudflare.com) were the nameservers listed for calculator.com at every ICANN zone-file snapshot AboutUs holds from Apr 3, 2018 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Nameservers: CloudflareApr 4, 2018 – Jun 19, 2020Registration records listed Cloudflare nameservers (clark.ns.cloudflare.com, sara.ns.cloudflare.com) for calculator.com from Apr 4, 2018 to Jun 19, 2020. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: GoDaddyJun 21, 2020 – Jul 2, 2020Registration records listed GoDaddy nameservers (ns31.domaincontrol.com, ns32.domaincontrol.com) for calculator.com from Jun 21, 2020 to Jul 2, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to GoDaddyJun 21, 2020calculator.com's nameservers moved from Cloudflare to GoDaddy between Jun 19, 2020 and Jun 21, 2020. Last seen at Cloudflare: Jun 19, 2020 (registration record). First seen at GoDaddy: Jun 21, 2020 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: Amazon Route 53Jul 13, 2020 – Jul 27, 2020Registration records listed Amazon Route 53 nameservers (ns-1306.awsdns-35.org, ns-1666.awsdns-16.co.uk, ns-186.awsdns-23.com…) for calculator.com from Jul 13, 2020 to Jul 27, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to Amazon Route 53Jul 13, 2020calculator.com's nameservers moved from GoDaddy to Amazon Route 53 between Jul 2, 2020 and Jul 13, 2020. Last seen at GoDaddy: Jul 2, 2020 (registration record). First seen at Amazon Route 53: Jul 13, 2020 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: CloudflareNameservers: CloudflareAug 1, 2020 – Jun 18, 2026Registration records listed Cloudflare nameservers (clark.ns.cloudflare.com, sara.ns.cloudflare.com) for calculator.com from Aug 1, 2020 to Jun 18, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to CloudflareAug 1, 2020calculator.com's nameservers moved from Amazon Route 53 to Cloudflare between Jul 27, 2020 and Aug 1, 2020. Last seen at Amazon Route 53: Jul 27, 2020 (registration record). First seen at Cloudflare: Aug 1, 2020 (registration record).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: clark.ns.cloudflare.com, sara.ns.cloudflare.com.Source: ICANN CZDS zone file, snapshot Nov 14, 2026
Google Trust Services
May 5, 2026 – Nov 15, 2026 (latest)
Google Trust Services issued 4 certificates for calculator.com from May 5, 2026, the latest valid until Jan 27, 2027. Seen in use on Oct 29, 2026.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 29, 2026
Zone file: Registration records listed athera.com nameservers (ns1.athera.com, ns2.athera.com) for calculator.com from Dec 26, 2008 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)
Dec 26, 2008Zone file: calculator.com's nameservers moved from calculator.com to athera.com between Dec 12, 2008 and Dec 26, 2008. Last seen at calculator.com: Dec 12, 2008 (registration record). First seen at athera.com: Dec 26, 2008 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Jul 19, 2011 – Apr 4, 2020Registrar: Registrar Network Solutions, LLC (IANA 2) in the WHOIS and RDAP records held for calculator.com, from Jul 19, 2011 to Apr 4, 2020.Source: WHOIS / RDAP archive (who.is)
Oct 18, 2013 – Apr 1, 2016Zone file: athera.com (cloud.athera.com, ns1.athera.com, ns10.athera.com…) were the nameservers listed for calculator.com at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Apr 1, 2016 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Apr 2, 2016 – Dec 5, 2017Zone file: Registration records listed athera.com nameservers (ns1.athera.com, ns2.athera.com) for calculator.com from Apr 2, 2016 to Dec 5, 2017. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 23, 2017 – Apr 2, 2018Zone file: Registration records listed Cloudflare nameservers (clark.ns.cloudflare.com, sara.ns.cloudflare.com) for calculator.com from Dec 23, 2017 to Apr 2, 2018. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 23, 2017Zone file: calculator.com's nameservers moved from athera.com to Cloudflare between Dec 5, 2017 and Dec 23, 2017. Last seen at athera.com: Dec 5, 2017 (registration record). First seen at Cloudflare: Dec 23, 2017 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Apr 3, 2018Zone file: Cloudflare (clark.ns.cloudflare.com, sara.ns.cloudflare.com) were the nameservers listed for calculator.com at every ICANN zone-file snapshot AboutUs holds from Apr 3, 2018 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Apr 4, 2018 – Jun 19, 2020Zone file: Registration records listed Cloudflare nameservers (clark.ns.cloudflare.com, sara.ns.cloudflare.com) for calculator.com from Apr 4, 2018 to Jun 19, 2020. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Mar 22, 2020Registrant: The registrant name or organization in the registration record changed; first recorded Mar 22, 2020. 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
May 21, 2020 – Nov 5, 2026Registrar: Registrar GoDaddy.com, LLC (IANA 146) in the registration data recorded, first on May 21, 2020 and most recently on Nov 5, 2026.Source: RDAP, fetched Nov 13, 2026
Jun 19, 2020Registrant: The registrant name or organization in the registration record changed; first recorded Jun 19, 2020. 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
Jun 21, 2020 – Jul 2, 2020Zone file: Registration records listed GoDaddy nameservers (ns31.domaincontrol.com, ns32.domaincontrol.com) for calculator.com from Jun 21, 2020 to Jul 2, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
Jun 21, 2020Zone file: calculator.com's nameservers moved from Cloudflare to GoDaddy between Jun 19, 2020 and Jun 21, 2020. Last seen at Cloudflare: Jun 19, 2020 (registration record). First seen at GoDaddy: Jun 21, 2020 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Jul 13, 2020 – Jul 27, 2020Zone file: Registration records listed Amazon Route 53 nameservers (ns-1306.awsdns-35.org, ns-1666.awsdns-16.co.uk, ns-186.awsdns-23.com…) for calculator.com from Jul 13, 2020 to Jul 27, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
Jul 13, 2020Zone file: calculator.com's nameservers moved from GoDaddy to Amazon Route 53 between Jul 2, 2020 and Jul 13, 2020. Last seen at GoDaddy: Jul 2, 2020 (registration record). First seen at Amazon Route 53: Jul 13, 2020 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Aug 1, 2020 – Jun 18, 2026Zone file: Registration records listed Cloudflare nameservers (clark.ns.cloudflare.com, sara.ns.cloudflare.com) for calculator.com from Aug 1, 2020 to Jun 18, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Aug 1, 2020Zone file: calculator.com's nameservers moved from Amazon Route 53 to Cloudflare between Jul 27, 2020 and Aug 1, 2020. Last seen at Amazon Route 53: Jul 27, 2020 (registration record). First seen at Cloudflare: Aug 1, 2020 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Oct 20, 2020Registrant: The registrant name or organization in the registration record changed; first recorded Oct 20, 2020. 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 9, 2026 – Nov 15, 2026Certificate: Let's Encrypt issued 12 certificates for calculator.com from Apr 9, 2026, the latest valid until Feb 4, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
May 5, 2026 – Nov 15, 2026Certificate: Google Trust Services issued 4 certificates for calculator.com from May 5, 2026, the latest valid until Jan 27, 2027. Seen in use on Oct 29, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 29, 2026
Jun 19, 2026 – Nov 13, 2026AboutUs record: Authority and Safety last refreshed Nov 13, 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: clark.ns.cloudflare.com, sara.ns.cloudflare.com.Source: ICANN CZDS zone file, snapshot Nov 14, 2026
The site's bot protection blocked AboutUs's HTTPS check; all 1 of the other checks passed (Nov 15, 2026).
Registered 1996 · AboutUs's live check was blocked by the site's bot protection
Calculator.com Get your calculation done by online calculator
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 24, 1996 — 30 years old.
latest result
Registrar on record: GoDaddy.com, LLC — unchanged since AboutUs began tracking (Sep 24, 2026).
checked Sep 30, 2026
The site names calculator.com as the organisation behind it.
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 72/100— ahead of 72% of the August 2026 scored sampleClear
Why this authority score
72 is a percentile: higher than 72% of sites we score.
How it's calculated
Prominence (Tranco rank #382,970)+5
Verified continuity: 30.8 years (RDAP registration)+11
Identity corroboration (capped)+4
Security & email hygiene+5
Calibration adjustment (published map)+11
Model score: 36/99 — what these reason lines add up to.
Published Authority (percentile): 72/100 — this site's rank against the August 2026 scored sample. Public Authority is capped at 99.
What calculator.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
Online calculators for everything. Some solve problems, some satisfy curiosity.
Site history
Dated record — historical facts always carry their date.
1996
Domain registered (Jan 24, 1996).
2026
Checked today — The site's bot protection blocked AboutUs's HTTPS check; all 1 of the other checks passed (Nov 15, 2026).
✓ domain continuity 30 years registered– live check blocked the site's bot protection turned the check away Nov 15, 2026
Safety evidence
No unexpired threat-feed result; name-similarity check available (recorded about 2 days ago); 3/3 transport and email checks available (oldest recorded about 2 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