Verifying against the live site and live WHOIS/DNS…
Common questions
Is optica.org 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 optica.org?
Nobody has completed AboutUs's owner verification for optica.org. 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 2016 · site is live · HTTPS valid
Optica
Optica is a professional society for optics and photonics researchers and practitioners. It provides peer-reviewed publications (20 journals), conferences, and membership programs to advance light science and technology. The organization hosts major international events including Frontiers in Optics, CLEO, and OFC conferences.
Authority 57/100— ahead of 57% of the August 2026 scored sampleClear
Why this authority score
57 is a percentile: higher than 57% of sites we score.
How it's calculated
Prominence (Tranco rank #18,003)+8
Verified continuity: 10.5 years (RDAP registration)+8
Security & email hygiene+3
Calibration adjustment (published map)+11
Model score: 30/99 — what these reason lines add up to.
Published Authority (percentile): 57/100 — 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 36 days ago); 3/3 transport and email checks available (oldest recorded about 36 days ago). This is evidence coverage, not a probability that a website is safe.
What optica.org said about itself, 2014
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
2014
El dominio optica.org no se encuentra...
Now
Optica is a professional society for optics and photonics researchers and practitioners. It provides peer-reviewed publications (20 journals), conferences, and membership programs to advance light science and technology. The organization hosts major international events including Frontiers in Optics, CLEO, and OFC conferences.
AboutUs summary of the current website, Aug 24, 2026.
Site history
Dated record — historical facts always carry their date.
✓ domain continuity 10 years registered✓ live verified Oct 26, 2026
No caution flags in the available scoring observations; this is not a complete safety assessment
Lifeline · optica.org over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 10 years ago · on AboutUs since 2014 · 1 registrar change since Dec 21, 2016 · no ownership change on record since 2016 · last checked Sep 27, 2026.
Registration
RegisteredMay 10, 2016optica.org was registered on May 10, 2016.Source: RDAP, fetched Aug 31, 2026
AboutUs record
AboutUs wiki pageMar 31, 2014An AboutUs wiki page described optica.org from Mar 31, 2014 to Mar 31, 2014 (1 edit).Source: AboutUs wiki archive, 2006–2023Said about itself in 2014Jul 1, 2014“El dominio optica.org no se encuentra...”Source: AboutUs wiki archive, 2014
Registrar
Domaincapitan.com LLCDec 21, 2016Registrar Domaincapitan.com LLC (IANA 1175) in the registration data recorded on Dec 21, 2016.Source: WHOIS / RDAP archive (who.is)GoDaddy.com, LLC
Ownership
Ownership recordsDec 21, 2016 – Jun 25, 2026Registration records for optica.org are held from Dec 21, 2016 to Jun 25, 2026 (61 records). None shows a change of registrant. Privacy-service and redaction changes are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
No ownership changes recorded, 2016–2026
Zone file
No nameserver records held, Dec 2016 – Feb 2020No nameserver records held, Dec 2016 – Feb 2020No nameserver records held, Feb 2020 – Apr 2022Nameservers: worldnic.comDec 21, 2016Registration records listed worldnic.com nameservers (ns79.worldnic.com, ns80.worldnic.com) for optica.org from Dec 21, 2016 to Dec 21, 2016.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
DigiCert IncMar 15, 2019 – Mar 14, 2020DigiCert Inc issued 2 certificates for optica.org from Mar 15, 2019, the latest valid until Mar 14, 2020.Source: Certificate Transparency logs (crt.sh)DigiCert Inc
201520202025Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (17)
Mar 31, 2014AboutUs record: An AboutUs wiki page described optica.org from Mar 31, 2014 to Mar 31, 2014 (1 edit).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2014AboutUs record: “El dominio optica.org no se encuentra...”Source: AboutUs wiki archive, 2014
May 10, 2016Registration: optica.org was registered on May 10, 2016.Source: RDAP, fetched Aug 31, 2026
Dec 21, 2016Registrar: Registrar Domaincapitan.com LLC (IANA 1175) in the registration data recorded on Dec 21, 2016.Source: WHOIS / RDAP archive (who.is)
Dec 21, 2016 – Jun 25, 2026Ownership: Registration records for optica.org are held from Dec 21, 2016 to Jun 25, 2026 (61 records). None shows a change of registrant. Privacy-service and redaction changes are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Dec 21, 2016Zone file: Registration records listed worldnic.com nameservers (ns79.worldnic.com, ns80.worldnic.com) for optica.org from Dec 21, 2016 to Dec 21, 2016.Source: From registration records (WHOIS / RDAP archive, who.is)
Current AboutUs recordJul 18, 2026 – Sep 20, 2026 (latest)Authority and Safety last refreshed Sep 20, 2026.Source: AboutUs checks
GoDaddy.com, LLC
Feb 4, 2020 – Sep 27, 2026 (latest)
Registrar GoDaddy.com, LLC (IANA 146) in the registration data recorded, first on Feb 4, 2020 and most recently on Sep 27, 2026.
Source: RDAP, fetched Aug 31, 2026
Nameservers: sedoparking.comFeb 4, 2020Registration records listed sedoparking.com nameservers (ns1.sedoparking.com, ns2.sedoparking.com) for optica.org from Feb 4, 2020 to Feb 4, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to sedoparking.comFeb 4, 2020optica.org's nameservers moved from worldnic.com to sedoparking.com at some point between Dec 21, 2016 and Feb 4, 2020. Last seen at worldnic.com: Dec 21, 2016 (registration record). First seen at sedoparking.com: Feb 4, 2020 (registration record). AboutUs holds no nameserver records for the about 3 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 → registration record)
Nameservers: osa.orgNameservers: osa.orgApr 19, 2022 – Jun 25, 2026Registration records listed osa.org nameservers (ns1.osa.org, ns2.osa.org) for optica.org from Apr 19, 2022 to Jun 25, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to osa.orgApr 19, 2022optica.org's nameservers moved from sedoparking.com to osa.org at some point between Feb 4, 2020 and Apr 19, 2022. Last seen at sedoparking.com: Feb 4, 2020 (registration record). First seen at osa.org: Apr 19, 2022 (registration record). AboutUs holds no nameserver records for the about 2 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 → registration record)
DigiCert Inc
May 15, 2020 – Oct 26, 2026 (latest)
DigiCert Inc issued 26 certificates for optica.org from May 15, 2020, the latest valid until May 6, 2027. Seen in use on Sep 27, 2026.
AmazonAmazonDec 31, 2025 – Oct 26, 2026Amazon issued 8 certificates for optica.org from Dec 31, 2025, the latest valid until Apr 12, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Let's EncryptMar 21, 2026 – Oct 26, 2026Let's Encrypt issued 46 certificates for optica.org from Mar 21, 2026, the latest valid until Jan 15, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Google Trust ServicesOct 20, 2026 – Oct 26, 2026Google Trust Services issued 2 certificates for optica.org from Oct 20, 2026, the latest valid until Jan 18, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Mar 15, 2019 – Mar 14, 2020Certificate: DigiCert Inc issued 2 certificates for optica.org from Mar 15, 2019, the latest valid until Mar 14, 2020.Source: Certificate Transparency logs (crt.sh)
Feb 4, 2020 – Sep 27, 2026Registrar: Registrar GoDaddy.com, LLC (IANA 146) in the registration data recorded, first on Feb 4, 2020 and most recently on Sep 27, 2026.Source: RDAP, fetched Aug 31, 2026
Feb 4, 2020Zone file: Registration records listed sedoparking.com nameservers (ns1.sedoparking.com, ns2.sedoparking.com) for optica.org from Feb 4, 2020 to Feb 4, 2020.Source: From registration records (WHOIS / RDAP archive, who.is)
Feb 4, 2020Zone file: optica.org's nameservers moved from worldnic.com to sedoparking.com at some point between Dec 21, 2016 and Feb 4, 2020. Last seen at worldnic.com: Dec 21, 2016 (registration record). First seen at sedoparking.com: Feb 4, 2020 (registration record). AboutUs holds no nameserver records for the about 3 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 → registration record)
May 15, 2020 – Oct 26, 2026Certificate: DigiCert Inc issued 26 certificates for optica.org from May 15, 2020, the latest valid until May 6, 2027. Seen in use on Sep 27, 2026.Source: Certificate Transparency logs (crt.sh + AboutUs's own certificate-log reader); TLS check, Sep 27, 2026
Apr 19, 2022 – Jun 25, 2026Zone file: Registration records listed osa.org nameservers (ns1.osa.org, ns2.osa.org) for optica.org from Apr 19, 2022 to Jun 25, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Apr 19, 2022Zone file: optica.org's nameservers moved from sedoparking.com to osa.org at some point between Feb 4, 2020 and Apr 19, 2022. Last seen at sedoparking.com: Feb 4, 2020 (registration record). First seen at osa.org: Apr 19, 2022 (registration record). AboutUs holds no nameserver records for the about 2 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 → registration record)
Dec 31, 2025 – Oct 26, 2026Certificate: Amazon issued 8 certificates for optica.org from Dec 31, 2025, the latest valid until Apr 12, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Mar 21, 2026 – Oct 26, 2026Certificate: Let's Encrypt issued 46 certificates for optica.org from Mar 21, 2026, the latest valid until Jan 15, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 18, 2026 – Sep 20, 2026AboutUs record: Authority and Safety last refreshed Sep 20, 2026.Source: AboutUs checks
Oct 20, 2026 – Oct 26, 2026Certificate: Google Trust Services issued 2 certificates for optica.org from Oct 20, 2026, the latest valid until Jan 18, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)