Verifying against the live site and live WHOIS/DNS…
Common questions
Is sustainability.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 sustainability.com?
Nobody has completed AboutUs's owner verification for sustainability.com. That's true of most sites here — it isn't itself a warning sign.
Correct a description, link or other detail. Submissions are reviewed before publication.
Registered 1995 · its address redirects to www.erm.com, which answered over HTTPS
SustainAbility.com
SustainAbility is a strategy consultancy and independent think tank established in 1987, specializing in corporate responsibility and sustainable development. It advises leading companies, NGOs, and influencers on business risks and market opportunities related to sustainability, with offices in Europe and the United States.
Checked in the last 30 daysOlder, dated recordFrom registration records
On AboutUs since 2006 · 2 registrar changes since Jul 12, 2016 · 2 ownership changes since 2007 · last checked Oct 2, 2026.
Registration
No registration date on file yet. AboutUs reads it from RDAP when the site is checked.
AboutUs record
AboutUs wiki pageJun 21, 2006 – Apr 21, 2009An AboutUs wiki page described sustainability.com from Jun 21, 2006 to Apr 21, 2009 (3 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006Jul 1, 2006“Established in 1987, SustainAbility is a strategy consultancy and independent think tank specialising in the business risks and market opportunities of corporate responsibility and sustainable development. We understand…”Source: AboutUs wiki archive, 2006
Registrar
REGISTER S.P.A.REGISTER S.P.A.Jul 12, 2016 – Aug 3, 2021Registrar REGISTER S.P.A. (IANA 168) in the WHOIS and RDAP records held for sustainability.com, from Jul 12, 2016 to Aug 3, 2021.Source: WHOIS / RDAP archive (who.is)CSC Corporate Domains, Inc.
Ownership
Ownership recordsJul 5, 2007 – Jun 9, 2026Registration records for sustainability.com are held from Jul 5, 2007 to Jun 9, 2026 (188 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 2010 – Oct 2013Nameservers: mydnsserver.co.ukJul 5, 2007 – Sep 9, 2007Registration records listed mydnsserver.co.uk nameservers (ns0.mydnsserver.co.uk, ns1.mydnsserver.co.uk) for sustainability.com from Jul 5, 2007 to Sep 9, 2007.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
Google Trust ServicesMar 19, 2026 – Oct 26, 2026 (latest)Google Trust Services issued 11 certificates for sustainability.com from Mar 19, 2026, the latest valid until Dec 21, 2026. Seen in use on Oct 2, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 2, 2026
2010201520202025Apr ’26← last 12 months, drawn wider
Every dated fact on this lifeline (24)
Jun 21, 2006 – Apr 21, 2009AboutUs record: An AboutUs wiki page described sustainability.com from Jun 21, 2006 to Apr 21, 2009 (3 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “Established in 1987, SustainAbility is a strategy consultancy and independent think tank specialising in the business risks and market opportunities of corporate responsibility and sustainable development. We understand…”Source: AboutUs wiki archive, 2006
Jul 5, 2007 – Jun 9, 2026Ownership: Registration records for sustainability.com are held from Jul 5, 2007 to Jun 9, 2026 (188 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
Jul 5, 2007 – Sep 9, 2007Zone file: Registration records listed mydnsserver.co.uk nameservers (ns0.mydnsserver.co.uk, ns1.mydnsserver.co.uk) for sustainability.com from Jul 5, 2007 to Sep 9, 2007.Source: From registration records (WHOIS / RDAP archive, who.is)
Feb 11, 2008 – Feb 8, 2010Zone file: Registration records listed rapidhost.co.uk nameservers (ns0.rapidhost.co.uk, ns1.rapidhost.co.uk, nsus.rapidhost.co.uk) for sustainability.com from Feb 11, 2008 to Feb 8, 2010.Source: From registration records (WHOIS / RDAP archive, who.is)
All 4 safety checks passed (Oct 26, 2026).
Automated safety checks
DNS (passed)
HTTPS (passed)
Page metadata (passed)
Security headers (passed)
Current facts
Latest available measurements; dated entries retain their dates. These are measurements, not an endorsement of the site.
latest result
Domain registered Aug 2, 1995 — 31 years old.
latest result
Registrar on record: Cloudflare, Inc. — unchanged since AboutUs began tracking (Sep 4, 2026).
Current AboutUs record
Jul 11, 2026 – Aug 24, 2026 (latest)
Authority and Safety last refreshed Aug 24, 2026.
Source: AboutUs checks
CSC Corporate Domains, Inc.
Sep 5, 2021 – Jul 30, 2025
Registrar CSC Corporate Domains, Inc. (IANA 299) in the WHOIS and RDAP records held for sustainability.com, from Sep 5, 2021 to Jul 30, 2025.
Source: WHOIS / RDAP archive (who.is)
Cloudflare, Inc.Cloudflare, Inc.Oct 5, 2025 – Oct 26, 2026 (latest)Registrar Cloudflare, Inc. (IANA 1910) in the registration data recorded, first on Oct 5, 2025 and most recently on Oct 26, 2026.Source: RDAP, fetched Jul 11, 2026
Ownership change
Aug 14, 2017
The registrant name or organization in the registration record changed; first recorded Aug 14, 2017. Who it changed to is in the full report.
Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Ownership changeSep 5, 2021The registrant name or organization in the registration record changed; first recorded Sep 5, 2021. 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, 2007–2026
Nameservers: rapidhost.co.ukFeb 11, 2008 – Feb 8, 2010Registration records listed rapidhost.co.uk nameservers (ns0.rapidhost.co.uk, ns1.rapidhost.co.uk, nsus.rapidhost.co.uk) for sustainability.com from Feb 11, 2008 to Feb 8, 2010.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to rapidhost.co.ukFeb 11, 2008sustainability.com's nameservers moved from mydnsserver.co.uk to rapidhost.co.uk at some point between Sep 9, 2007 and Feb 11, 2008. Last seen at mydnsserver.co.uk: Sep 9, 2007 (registration record). First seen at rapidhost.co.uk: Feb 11, 2008 (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)
Nameservers: phase8.netNameservers: phase8.netOct 18, 2013 – Apr 3, 2018phase8.net (ns0.phase8.net, ns1.phase8.net, ns2.phase8.net) were the nameservers listed for sustainability.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)
DNS moved to phase8.netOct 18, 2013sustainability.com's nameservers moved from rapidhost.co.uk to phase8.net at some point between Feb 8, 2010 and Oct 18, 2013. Last seen at rapidhost.co.uk: Feb 8, 2010 (registration record). First seen at phase8.net: Oct 18, 2013 (ICANN zone-file snapshot). AboutUs holds no nameserver records for the about 4 years 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: phase8.netNameservers: phase8.netApr 4, 2018 – Aug 3, 2021Registration records listed phase8.net nameservers (ns0.phase8.net, ns1.phase8.net, ns2.phase8.net) for sustainability.com from Apr 4, 2018 to Aug 3, 2021. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: cscdns.netSep 5, 2021 – Apr 22, 2022Registration records listed cscdns.net nameservers (dns1.cscdns.net, dns2.cscdns.net) for sustainability.com from Sep 5, 2021 to Apr 22, 2022.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to cscdns.netSep 5, 2021sustainability.com's nameservers moved from phase8.net to cscdns.net between Aug 3, 2021 and Sep 5, 2021. Last seen at phase8.net: Aug 3, 2021 (registration record). First seen at cscdns.net: Sep 5, 2021 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: microsoftonline.comMay 24, 2022 – Jul 30, 2025Registration records listed microsoftonline.com nameservers (ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com…) for sustainability.com from May 24, 2022 to Jul 30, 2025.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to microsoftonline.comMay 24, 2022sustainability.com's nameservers moved from cscdns.net to microsoftonline.com between Apr 22, 2022 and May 24, 2022. Last seen at cscdns.net: Apr 22, 2022 (registration record). First seen at microsoftonline.com: May 24, 2022 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: CloudflareOct 5, 2025 – Jun 9, 2026Registration records listed Cloudflare nameservers (curt.ns.cloudflare.com, lisa.ns.cloudflare.com) for sustainability.com from Oct 5, 2025 to Jun 9, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to CloudflareOct 5, 2025sustainability.com's nameservers moved from microsoftonline.com to Cloudflare at some point between Jul 30, 2025 and Oct 5, 2025. Last seen at microsoftonline.com: Jul 30, 2025 (registration record). First seen at Cloudflare: Oct 5, 2025 (registration record). AboutUs holds no nameserver records for the 2 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 – Sep 28, 2026 (latest)First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Sep 28, 2026. Nameservers on Sep 28, 2026: curt.ns.cloudflare.com, lisa.ns.cloudflare.com.Source: ICANN CZDS zone file, snapshot Sep 28, 2026
Let's Encrypt
Mar 22, 2026 – Oct 26, 2026
Let's Encrypt issued 7 certificates for sustainability.com from Mar 22, 2026, the latest valid until Dec 28, 2026.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Feb 11, 2008Zone file: sustainability.com's nameservers moved from mydnsserver.co.uk to rapidhost.co.uk at some point between Sep 9, 2007 and Feb 11, 2008. Last seen at mydnsserver.co.uk: Sep 9, 2007 (registration record). First seen at rapidhost.co.uk: Feb 11, 2008 (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)
Oct 18, 2013 – Apr 3, 2018Zone file: phase8.net (ns0.phase8.net, ns1.phase8.net, ns2.phase8.net) were the nameservers listed for sustainability.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)
Oct 18, 2013Zone file: sustainability.com's nameservers moved from rapidhost.co.uk to phase8.net at some point between Feb 8, 2010 and Oct 18, 2013. Last seen at rapidhost.co.uk: Feb 8, 2010 (registration record). First seen at phase8.net: Oct 18, 2013 (ICANN zone-file snapshot). AboutUs holds no nameserver records for the about 4 years 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)
Jul 12, 2016 – Aug 3, 2021Registrar: Registrar REGISTER S.P.A. (IANA 168) in the WHOIS and RDAP records held for sustainability.com, from Jul 12, 2016 to Aug 3, 2021.Source: WHOIS / RDAP archive (who.is)
Aug 14, 2017Ownership: The registrant name or organization in the registration record changed; first recorded Aug 14, 2017. Who it changed to is in the full report.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Apr 4, 2018 – Aug 3, 2021Zone file: Registration records listed phase8.net nameservers (ns0.phase8.net, ns1.phase8.net, ns2.phase8.net) for sustainability.com from Apr 4, 2018 to Aug 3, 2021. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Sep 5, 2021 – Jul 30, 2025Registrar: Registrar CSC Corporate Domains, Inc. (IANA 299) in the WHOIS and RDAP records held for sustainability.com, from Sep 5, 2021 to Jul 30, 2025.Source: WHOIS / RDAP archive (who.is)
Sep 5, 2021Ownership: The registrant name or organization in the registration record changed; first recorded Sep 5, 2021. Who it changed to is in the full report.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Sep 5, 2021 – Apr 22, 2022Zone file: Registration records listed cscdns.net nameservers (dns1.cscdns.net, dns2.cscdns.net) for sustainability.com from Sep 5, 2021 to Apr 22, 2022.Source: From registration records (WHOIS / RDAP archive, who.is)
Sep 5, 2021Zone file: sustainability.com's nameservers moved from phase8.net to cscdns.net between Aug 3, 2021 and Sep 5, 2021. Last seen at phase8.net: Aug 3, 2021 (registration record). First seen at cscdns.net: Sep 5, 2021 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
May 24, 2022 – Jul 30, 2025Zone file: Registration records listed microsoftonline.com nameservers (ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com…) for sustainability.com from May 24, 2022 to Jul 30, 2025.Source: From registration records (WHOIS / RDAP archive, who.is)
May 24, 2022Zone file: sustainability.com's nameservers moved from cscdns.net to microsoftonline.com between Apr 22, 2022 and May 24, 2022. Last seen at cscdns.net: Apr 22, 2022 (registration record). First seen at microsoftonline.com: May 24, 2022 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Oct 5, 2025 – Oct 26, 2026Registrar: Registrar Cloudflare, Inc. (IANA 1910) in the registration data recorded, first on Oct 5, 2025 and most recently on Oct 26, 2026.Source: RDAP, fetched Jul 11, 2026
Oct 5, 2025 – Jun 9, 2026Zone file: Registration records listed Cloudflare nameservers (curt.ns.cloudflare.com, lisa.ns.cloudflare.com) for sustainability.com from Oct 5, 2025 to Jun 9, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Oct 5, 2025Zone file: sustainability.com's nameservers moved from microsoftonline.com to Cloudflare at some point between Jul 30, 2025 and Oct 5, 2025. Last seen at microsoftonline.com: Jul 30, 2025 (registration record). First seen at Cloudflare: Oct 5, 2025 (registration record). AboutUs holds no nameserver records for the 2 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)
Mar 19, 2026 – Oct 26, 2026Certificate: Google Trust Services issued 11 certificates for sustainability.com from Mar 19, 2026, the latest valid until Dec 21, 2026. Seen in use on Oct 2, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 2, 2026
Mar 22, 2026 – Oct 26, 2026Certificate: Let's Encrypt issued 7 certificates for sustainability.com from Mar 22, 2026, the latest valid until Dec 28, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 11, 2026 – Aug 24, 2026AboutUs record: Authority and Safety last refreshed Aug 24, 2026.Source: AboutUs checks
Sep 8, 2026 – Sep 28, 2026Zone file: First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Sep 28, 2026. Nameservers on Sep 28, 2026: curt.ns.cloudflare.com, lisa.ns.cloudflare.com.Source: ICANN CZDS zone file, snapshot Sep 28, 2026
Authority 50/100— ahead of 50% of the August 2026 scored sampleClear
Why this authority score
50 is a percentile: higher than 50% of sites we score.
How it's calculated
Prominence (Tranco rank #446,492)+5
Verified continuity: 31.3 years (RDAP registration)+11
Security & email hygiene+3
Calibration adjustment (published map)+8
Model score: 27/99 — what these reason lines add up to.
Published Authority (percentile): 50/100 — 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 63 days ago); 3/3 transport and email checks available (oldest recorded about 63 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 sustainability.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
Established in 1987, SustainAbility is a strategy consultancy and independent think tank specialising in the business risks and market opportunities of corporate responsibility and sustainable development. We understand business and what society expects of it.
Site history
Dated record — historical facts always carry their date.