Verifying against the live site and live WHOIS/DNS…
Common questions
Is six-sigma.com 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 six-sigma.com?
Nobody has completed AboutUs's owner verification for six-sigma.com. That's true of most sites here — it isn't itself a warning sign.
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 27 years ago · on AboutUs since 2006 · 2 registrar changes since Sep 5, 2013 · 2 ownership changes since 2009 · last checked Oct 28, 2026.
Registration
RegisteredNov 30, 1998six-sigma.com was registered on Nov 30, 1998.Source: RDAP, fetched Sep 2, 2026
AboutUs record
AboutUs wiki pageJun 21, 2006 – Jan 8, 2008An AboutUs wiki page described six-sigma.com from Jun 21, 2006 to Jan 8, 2008 (2 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006Jul 1, 2006
Registrar
IONOS SESep 5, 2013 – Feb 11, 2017Registrar IONOS SE (IANA 83) in the WHOIS and RDAP records held for six-sigma.com, from Sep 5, 2013 to Feb 11, 2017.Source: WHOIS / RDAP archive (who.is)PSI-USA, Inc. dba Domain RobotPSI-USA, Inc. dba Domain Robot
Ownership
Ownership recordsJun 6, 2009 – Nov 26, 2025Registration records for six-sigma.com are held from Jun 6, 2009 to Nov 26, 2025 (34 records). 2 changes of registrant name or organization are marked. Privacy-service and redaction changes are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Zone file
No nameserver records held, Feb 2017 – Apr 2018No nameserver records held, Apr 2020 – Dec 2020No nameserver records held, Nov 2025 – Sep 2026Nameservers: hostings.comJun 6, 2009 – Jan 10, 2011Registration records listed hostings.com nameservers (ns.hostings.com, ns2.hostings.com) for six-sigma.com from Jun 6, 2009 to Jan 10, 2011.
Certificate
Let's EncryptMay 6, 2026 – Oct 29, 2026 (latest)Let's Encrypt issued 3 certificates for six-sigma.com from May 6, 2026, the latest valid until Dec 2, 2026. Seen in use on Oct 1, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 1, 2026
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (25)
Nov 30, 1998Registration: six-sigma.com was registered on Nov 30, 1998.Source: RDAP, fetched Sep 2, 2026
Jun 21, 2006 – Jan 8, 2008AboutUs record: An AboutUs wiki page described six-sigma.com from Jun 21, 2006 to Jan 8, 2008 (2 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “Providers of quality Six Sigma training and process improvement methodology. We can provide training for Green Belt, Black Belt, and Master Black Belt certification as well as management training.”Source: AboutUs wiki archive, 2006
Jun 6, 2009 – Nov 26, 2025Ownership: Registration records for six-sigma.com are held from Jun 6, 2009 to Nov 26, 2025 (34 records). 2 changes of registrant name or organization are marked. Privacy-service and redaction changes are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Jun 6, 2009 – Jan 10, 2011Zone file: Registration records listed hostings.com nameservers (ns.hostings.com, ns2.hostings.com) for six-sigma.com from Jun 6, 2009 to Jan 10, 2011.Source: From registration records (WHOIS / RDAP archive, who.is)
Feb 16, 2011 – Oct 17, 2013
Automated safety checks
DNS (passed)
HTTPS (passed)
Page metadata (passed)
Security headers (failed)
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
“Providers of quality Six Sigma training and process improvement methodology. We can provide training for Green Belt, Black Belt, and Master Black Belt certification as well as management training.”
Source: AboutUs wiki archive, 2006
Current AboutUs recordJun 24, 2026 – Aug 17, 2026 (latest)Authority and Safety last refreshed Aug 17, 2026.Source: AboutUs checks
Aug 15, 2018 – Nov 26, 2025
Registrar PSI-USA, Inc. dba Domain Robot (IANA 151) in the WHOIS and RDAP records held for six-sigma.com, from Aug 15, 2018 to Nov 26, 2025.
Source: WHOIS / RDAP archive (who.is)
InterNetX GmbHSep 2, 2026 – Sep 29, 2026 (latest)Registrar InterNetX GmbH in the registration data recorded, first on Sep 2, 2026 and most recently on Sep 29, 2026.Source: RDAP, fetched Sep 2, 2026
Ownership change
Sep 5, 2013
The registrant name or organization in the registration record changed; first recorded Sep 5, 2013. Who it changed to is in the full report.
Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Ownership changeFeb 11, 2017The registrant name or organization in the registration record changed; first recorded Feb 11, 2017. Who it changed to is in the full report.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
2 ownership changes, 2009–2025
Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: 1und1.deFeb 16, 2011 – Oct 17, 2013Registration records listed 1und1.de nameservers (ns65.1und1.de, ns66.1und1.de) for six-sigma.com from Feb 16, 2011 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 1und1.deFeb 16, 2011six-sigma.com's nameservers moved from hostings.com to 1und1.de between Jan 10, 2011 and Feb 16, 2011. Last seen at hostings.com: Jan 10, 2011 (registration record). First seen at 1und1.de: Feb 16, 2011 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: 1und1.deOct 18, 2013 – Apr 1, 20161und1.de (ns65.1und1.de, ns66.1und1.de) were the nameservers listed for six-sigma.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: 1und1.deApr 2, 2016 – Feb 11, 2017Registration records listed 1und1.de nameservers (ns65.1und1.de, ns66.1und1.de) for six-sigma.com from Apr 2, 2016 to Feb 11, 2017. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.orgApr 3, 2018ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org (ns1078.ui-dns.biz, ns1078.ui-dns.com, ns1078.ui-dns.de…) were the nameservers listed for six-sigma.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)
DNS moved to ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.orgApr 3, 2018six-sigma.com's nameservers moved from 1und1.de to ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org at some point between Feb 11, 2017 and Apr 3, 2018. Last seen at 1und1.de: Feb 11, 2017 (registration record). First seen at ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org: Apr 3, 2018 (ICANN zone-file snapshot). AboutUs holds no nameserver records for the 14 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 → ICANN zone-file snapshot)
Nameservers: ns3webgo.de, webgo.deAug 15, 2018 – Apr 11, 2020Registration records listed ns3webgo.de, webgo.de nameservers (n2.webgo.de, ns1.webgo.de, ns3webgo.de…) for six-sigma.com from Aug 15, 2018 to Apr 11, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to ns3webgo.de, webgo.deAug 15, 2018six-sigma.com's nameservers moved from ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org to ns3webgo.de, webgo.de at some point between Apr 3, 2018 and Aug 15, 2018. Last seen at ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org: Apr 3, 2018 (ICANN zone-file snapshot). First seen at ns3webgo.de, webgo.de: Aug 15, 2018 (registration record). AboutUs holds no nameserver records for the 4 months in between, so the date of the move is not known more closely.Source: Derived from the nameserver records on this lifeline (ICANN zone-file snapshot → registration record)
Nameservers: siteground.bizDec 11, 2020Registration records listed siteground.biz nameservers (ns1.gfram1005.siteground.biz, ns2.gfram1005.siteground.biz) for six-sigma.com from Dec 11, 2020 to Dec 11, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to siteground.bizDec 11, 2020six-sigma.com's nameservers moved from ns3webgo.de, webgo.de to siteground.biz at some point between Apr 11, 2020 and Dec 11, 2020. Last seen at ns3webgo.de, webgo.de: Apr 11, 2020 (registration record). First seen at siteground.biz: Dec 11, 2020 (registration record). AboutUs holds no nameserver records for the 8 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: sgvps.netNameservers: sgvps.netJun 10, 2021 – Nov 26, 2025Registration records listed sgvps.net nameservers (ns1.c103809.sgvps.net, ns2.c103809.sgvps.net) for six-sigma.com from Jun 10, 2021 to Nov 26, 2025.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to sgvps.netJun 10, 2021six-sigma.com's nameservers moved from siteground.biz to sgvps.net at some point between Dec 11, 2020 and Jun 10, 2021. Last seen at siteground.biz: Dec 11, 2020 (registration record). First seen at sgvps.net: Jun 10, 2021 (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)
Seen in the .com zone fileSep 8, 2026 – Oct 28, 2026 (latest)First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Oct 28, 2026. Nameservers on Oct 28, 2026: ns1.c103809.sgvps.net, ns2.c103809.sgvps.net.Source: ICANN CZDS zone file, snapshot Oct 28, 2026
Zone file: Registration records listed 1und1.de nameservers (ns65.1und1.de, ns66.1und1.de) for six-sigma.com from Feb 16, 2011 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)
Feb 16, 2011Zone file: six-sigma.com's nameservers moved from hostings.com to 1und1.de between Jan 10, 2011 and Feb 16, 2011. Last seen at hostings.com: Jan 10, 2011 (registration record). First seen at 1und1.de: Feb 16, 2011 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Sep 5, 2013 – Feb 11, 2017Registrar: Registrar IONOS SE (IANA 83) in the WHOIS and RDAP records held for six-sigma.com, from Sep 5, 2013 to Feb 11, 2017.Source: WHOIS / RDAP archive (who.is)
Sep 5, 2013Ownership: The registrant name or organization in the registration record changed; first recorded Sep 5, 2013. Who it changed to is in the full report.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Oct 18, 2013 – Apr 1, 2016Zone file: 1und1.de (ns65.1und1.de, ns66.1und1.de) were the nameservers listed for six-sigma.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 – Feb 11, 2017Zone file: Registration records listed 1und1.de nameservers (ns65.1und1.de, ns66.1und1.de) for six-sigma.com from Apr 2, 2016 to Feb 11, 2017. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Feb 11, 2017Ownership: The registrant name or organization in the registration record changed; first recorded Feb 11, 2017. Who it changed to is in the full report.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Apr 3, 2018Zone file: ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org (ns1078.ui-dns.biz, ns1078.ui-dns.com, ns1078.ui-dns.de…) were the nameservers listed for six-sigma.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 3, 2018Zone file: six-sigma.com's nameservers moved from 1und1.de to ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org at some point between Feb 11, 2017 and Apr 3, 2018. Last seen at 1und1.de: Feb 11, 2017 (registration record). First seen at ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org: Apr 3, 2018 (ICANN zone-file snapshot). AboutUs holds no nameserver records for the 14 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 → ICANN zone-file snapshot)
Aug 15, 2018 – Nov 26, 2025Registrar: Registrar PSI-USA, Inc. dba Domain Robot (IANA 151) in the WHOIS and RDAP records held for six-sigma.com, from Aug 15, 2018 to Nov 26, 2025.Source: WHOIS / RDAP archive (who.is)
Aug 15, 2018 – Apr 11, 2020Zone file: Registration records listed ns3webgo.de, webgo.de nameservers (n2.webgo.de, ns1.webgo.de, ns3webgo.de…) for six-sigma.com from Aug 15, 2018 to Apr 11, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
Aug 15, 2018Zone file: six-sigma.com's nameservers moved from ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org to ns3webgo.de, webgo.de at some point between Apr 3, 2018 and Aug 15, 2018. Last seen at ui-dns.biz, ui-dns.com, ui-dns.de, ui-dns.org: Apr 3, 2018 (ICANN zone-file snapshot). First seen at ns3webgo.de, webgo.de: Aug 15, 2018 (registration record). AboutUs holds no nameserver records for the 4 months in between, so the date of the move is not known more closely.Source: Derived from the nameserver records on this lifeline (ICANN zone-file snapshot → registration record)
Dec 11, 2020Zone file: Registration records listed siteground.biz nameservers (ns1.gfram1005.siteground.biz, ns2.gfram1005.siteground.biz) for six-sigma.com from Dec 11, 2020 to Dec 11, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 11, 2020Zone file: six-sigma.com's nameservers moved from ns3webgo.de, webgo.de to siteground.biz at some point between Apr 11, 2020 and Dec 11, 2020. Last seen at ns3webgo.de, webgo.de: Apr 11, 2020 (registration record). First seen at siteground.biz: Dec 11, 2020 (registration record). AboutUs holds no nameserver records for the 8 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)
Jun 10, 2021 – Nov 26, 2025Zone file: Registration records listed sgvps.net nameservers (ns1.c103809.sgvps.net, ns2.c103809.sgvps.net) for six-sigma.com from Jun 10, 2021 to Nov 26, 2025.Source: From registration records (WHOIS / RDAP archive, who.is)
Jun 10, 2021Zone file: six-sigma.com's nameservers moved from siteground.biz to sgvps.net at some point between Dec 11, 2020 and Jun 10, 2021. Last seen at siteground.biz: Dec 11, 2020 (registration record). First seen at sgvps.net: Jun 10, 2021 (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)
May 6, 2026 – Oct 29, 2026Certificate: Let's Encrypt issued 3 certificates for six-sigma.com from May 6, 2026, the latest valid until Dec 2, 2026. Seen in use on Oct 1, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 1, 2026
Jun 24, 2026 – Aug 17, 2026AboutUs record: Authority and Safety last refreshed Aug 17, 2026.Source: AboutUs checks
Sep 2, 2026 – Sep 29, 2026Registrar: Registrar InterNetX GmbH in the registration data recorded, first on Sep 2, 2026 and most recently on Sep 29, 2026.Source: RDAP, fetched Sep 2, 2026
Sep 8, 2026 – Oct 28, 2026Zone file: First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Oct 28, 2026. Nameservers on Oct 28, 2026: ns1.c103809.sgvps.net, ns2.c103809.sgvps.net.Source: ICANN CZDS zone file, snapshot Oct 28, 2026
Domain registered Nov 30, 1998 — 27 years old.
latest result
Registrar on record: InterNetX GmbH — unchanged since AboutUs began tracking (Sep 2, 2026).
We withhold an authority number until independent evidence (global rank, link-graph presence) has accrued. The facts we do have about this site are shown below — we'd rather say “not enough signals yet” than invent a low score.
Safety evidence
No unexpired threat-feed result; name-similarity check available (recorded about 72 days ago); 3/3 transport and email checks available (oldest recorded about 72 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
What six-sigma.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
Providers of quality Six Sigma training and process improvement methodology. We can provide training for Green Belt, Black Belt, and Master Black Belt certification as well as management training.
Site history
Dated record — historical facts always carry their date.