Verifying against the live site and live WHOIS/DNS…
Common questions
Is nccn.org legit or a scam?
nccn.org was registered Apr 29, 1995 (31 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 nccn.org?
Nobody has completed AboutUs's owner verification for nccn.org. That's true of most sites here — it isn't itself a warning sign.
When was nccn.org registered?
nccn.org's registration dates to Apr 29, 1995 (31 years old), per public registration records. Network Solutions, LLC is the registrar on record today.
Correct a description, link or other detail. Submissions are reviewed before publication.
Lifeline · nccn.org over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 31 years ago · on AboutUs since 2006 · 1 registrar change since Jul 12, 2011 · 2 registrant changes since 2011 · last checked Nov 9, 2026.
Registration
RegisteredApr 29, 1995nccn.org was registered on Apr 29, 1995.Source: RDAP, fetched Nov 9, 2026
AboutUs record
AboutUs wiki pageAboutUs wiki pageJun 21, 2006 – Nov 8, 2013An AboutUs wiki page described nccn.org from Jun 21, 2006 to Nov 8, 2013 (11 edits).Source: AboutUs wiki archive, 2006–2023
Registrar
Network Solutions, LLC (R63-LROR)Jul 12, 2011 – Feb 20, 2014Registrar Network Solutions, LLC (R63-LROR) in the WHOIS and RDAP records held for nccn.org, from Jul 12, 2011 to Feb 20, 2014.Source: WHOIS / RDAP archive (who.is)Network Solutions, LLC
Registrant
Registrant recordsJul 12, 2011 – Jun 11, 2026Registration records for nccn.org are held from Jul 12, 2011 to Jun 11, 2026 (122 records). 2 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: worldnic.comNameservers: worldnic.comJul 12, 2011 – Nov 26, 2023Registration records listed worldnic.com nameservers (ns91.worldnic.com, ns92.worldnic.com) for nccn.org from Jul 12, 2011 to Nov 26, 2023.Source: From registration records (WHOIS / RDAP archive, who.is)Nameservers: Cloudflare
Certificate
AmazonAmazonJun 12, 2025 – Nov 13, 2026Amazon issued 10 certificates for nccn.org from Jun 12, 2025, the latest valid until Apr 28, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)DigiCert Inc
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (17)
Apr 29, 1995Registration: nccn.org was registered on Apr 29, 1995.Source: RDAP, fetched Nov 9, 2026
Jun 21, 2006 – Nov 8, 2013AboutUs record: An AboutUs wiki page described nccn.org from Jun 21, 2006 to Nov 8, 2013 (11 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “The National Comprehensive Cancer Network (NCCN), a not-for-profit alliance of 20 of the world’s leading cancer centers, is dedicated to improving the quality and effectiveness of care provided to patients with cancer.”Source: AboutUs wiki archive, 2006
Jul 1, 2008AboutUs record: “The National Comprehensive Cancer Network (NCCN), a not-for-profit alliance of 21 of the world’s leading cancer centers, is dedicated to improving the quality and effectiveness of care provided to patients with cancer.”Source: AboutUs wiki archive, 2008
Jul 12, 2011 – Feb 20, 2014Registrar: Registrar Network Solutions, LLC (R63-LROR) in the WHOIS and RDAP records held for nccn.org, from Jul 12, 2011 to Feb 20, 2014.Source: WHOIS / RDAP archive (who.is)
Jul 12, 2011 – Jun 11, 2026
Said about itself in 2006
Jul 1, 2006
“The National Comprehensive Cancer Network (NCCN), a not-for-profit alliance of 20 of the world’s leading cancer centers, is dedicated to improving the quality and effectiveness of care provided to patients with cancer.”
Source: AboutUs wiki archive, 2006
Said about itself in 2008Jul 1, 2008“The National Comprehensive Cancer Network (NCCN), a not-for-profit alliance of 21 of the world’s leading cancer centers, is dedicated to improving the quality and effectiveness of care provided to patients with cancer.”Source: AboutUs wiki archive, 2008
Current AboutUs recordJul 4, 2026 – Nov 9, 2026 (latest)Authority and Safety last refreshed Nov 9, 2026.Source: AboutUs checks
Network Solutions, LLC
Jul 17, 2016 – Nov 10, 2026 (latest)
Registrar Network Solutions, LLC (IANA 2) in the registration data recorded, first on Jul 17, 2016 and most recently on Nov 10, 2026.
Source: RDAP, fetched Nov 9, 2026
Registrant changeAug 14, 2020The registrant name or organization in the registration record changed; first recorded Aug 14, 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 changeJul 1, 2022The registrant name or organization in the registration record changed; first recorded Jul 1, 2022. 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
2 registrant changes, 2011–2026
Nameservers: CloudflareJan 7, 2024 – Jun 11, 2026Registration records listed Cloudflare nameservers (darwin.ns.cloudflare.com, melissa.ns.cloudflare.com) for nccn.org from Jan 7, 2024 to Jun 11, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to CloudflareJan 7, 2024nccn.org's nameservers moved from worldnic.com to Cloudflare between Nov 26, 2023 and Jan 7, 2024. Last seen at worldnic.com: Nov 26, 2023 (registration record). First seen at Cloudflare: Jan 7, 2024 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
DigiCert Inc
Dec 11, 2025 – Nov 13, 2026 (latest)
DigiCert Inc issued 4 certificates for nccn.org from Dec 11, 2025, the latest valid until May 27, 2027. Seen in use on Nov 3, 2026.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Nov 3, 2026
Let's EncryptApr 7, 2026 – Nov 13, 2026Let's Encrypt issued 25 certificates for nccn.org from Apr 7, 2026, the latest valid until Jan 22, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Google Trust ServicesMay 23, 2026 – Nov 13, 2026Google Trust Services issued 4 certificates for nccn.org from May 23, 2026, the latest valid until Dec 17, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Registrant: Registration records for nccn.org are held from Jul 12, 2011 to Jun 11, 2026 (122 records). 2 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
Jul 12, 2011 – Nov 26, 2023Zone file: Registration records listed worldnic.com nameservers (ns91.worldnic.com, ns92.worldnic.com) for nccn.org from Jul 12, 2011 to Nov 26, 2023.Source: From registration records (WHOIS / RDAP archive, who.is)
Jul 17, 2016 – Nov 10, 2026Registrar: Registrar Network Solutions, LLC (IANA 2) in the registration data recorded, first on Jul 17, 2016 and most recently on Nov 10, 2026.Source: RDAP, fetched Nov 9, 2026
Aug 14, 2020Registrant: The registrant name or organization in the registration record changed; first recorded Aug 14, 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
Jul 1, 2022Registrant: The registrant name or organization in the registration record changed; first recorded Jul 1, 2022. 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
Jan 7, 2024 – Jun 11, 2026Zone file: Registration records listed Cloudflare nameservers (darwin.ns.cloudflare.com, melissa.ns.cloudflare.com) for nccn.org from Jan 7, 2024 to Jun 11, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Jan 7, 2024Zone file: nccn.org's nameservers moved from worldnic.com to Cloudflare between Nov 26, 2023 and Jan 7, 2024. Last seen at worldnic.com: Nov 26, 2023 (registration record). First seen at Cloudflare: Jan 7, 2024 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Jun 12, 2025 – Nov 13, 2026Certificate: Amazon issued 10 certificates for nccn.org from Jun 12, 2025, the latest valid until Apr 28, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Dec 11, 2025 – Nov 13, 2026Certificate: DigiCert Inc issued 4 certificates for nccn.org from Dec 11, 2025, the latest valid until May 27, 2027. Seen in use on Nov 3, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Nov 3, 2026
Apr 7, 2026 – Nov 13, 2026Certificate: Let's Encrypt issued 25 certificates for nccn.org from Apr 7, 2026, the latest valid until Jan 22, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
May 23, 2026 – Nov 13, 2026Certificate: Google Trust Services issued 4 certificates for nccn.org from May 23, 2026, the latest valid until Dec 17, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 4, 2026 – Nov 9, 2026AboutUs record: Authority and Safety last refreshed Nov 9, 2026.Source: AboutUs checks
Registered 1995 · site is live · HTTPS valid
Nccn.org National Comprehensive Cancer Network (NCCN)
The National Comprehensive Cancer Network (NCCN) is a not-for-profit alliance of 21 leading cancer centers that develops clinical practice guidelines and resources for cancer care. It serves health care professionals, patients, and other decision-makers in the oncology field. NCCN is recognized as an authoritative source for cancer treatment information and guidelines used across the healthcare system.
Authority 80/100— ahead of 80% of the August 2026 scored sampleClear
Why this authority score
80 is a percentile: higher than 80% of sites we score.
How it's calculated
Prominence (Tranco rank #41,749)+6
Verified continuity: 31.5 years (RDAP registration)+11
Identity corroboration (capped)+4
Security & email hygiene+5
Calibration adjustment (published map)+15
Model score: 41/99 — what these reason lines add up to.
Published Authority (percentile): 80/100 — this site's rank against the August 2026 scored sample. Public Authority is capped at 99.
What nccn.org said about itself, 2006–2008
Quoted from the site's AboutUs wiki page in each year it changed (2 versions). These are the page's own words at the time, not AboutUs's assessment. New words · dropped words
2006
The National Comprehensive Cancer Network (NCCN), a not-for-profit alliance of 20 of the world’s leading cancer centers, is dedicated to improving the quality and effectiveness of care provided to patients with cancer.
2008
The National Comprehensive Cancer Network (NCCN), a not-for-profit alliance of20 21 of the world’s leading cancer centers, is dedicated to improving the quality and effectiveness of care provided to patients with cancer.
Site history
Dated record — historical facts always carry their date; self-description below is the 2013 record.
1995
Domain registered (Apr 29, 1995).
2006
First tracked by AboutUs (Jun 21, 2006); profile edited 11 times through 2013.
2013
Self-description at the time:
“Nccn.org National Comprehensive Cancer Network (NCCN)”
✓ domain continuity 31 years registered✓ live verified Nov 13, 2026
Safety evidence
No unexpired threat-feed result; name-similarity check available (recorded about 4 days ago); 3/3 transport and email checks available (oldest recorded about 4 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