Verifying against the live site and live WHOIS/DNS…
Common questions
Is siam.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 siam.org?
Nobody has completed AboutUs's owner verification for siam.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.
Lifeline · siam.org over time
Checked in the last 30 daysOlder, dated recordFrom registration records
On AboutUs since 2006 · 1 registrar change since Feb 16, 2017 · no registrant change on record since 2017 · last checked Nov 6, 2026.
Registration
No registration date on file yet. AboutUs reads it from RDAP when the site is checked.
AboutUs record
AboutUs wiki pageAboutUs wiki pageJun 21, 2006 – Nov 6, 2013An AboutUs wiki page described siam.org from Jun 21, 2006 to Nov 6, 2013 (5 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006Jul 1, 2006“SIAM exists to ensure the strongest interactions between mathematics and other scientific and technological communities through membership activities, publication of journals and books, and conferences.”Source: AboutUs wiki archive, 2006
Registrar
TUCOWS, INC.TUCOWS, INC.Feb 16, 2017 – Jun 26, 2026Registrar TUCOWS, INC. (IANA 69) in the WHOIS and RDAP records held for siam.org, from Feb 16, 2017 to Jun 26, 2026.Source: WHOIS / RDAP archive (who.is)
Registrant
Registrant recordsFeb 16, 2017 – Jun 26, 2026Registration records for siam.org are held from Feb 16, 2017 to Jun 26, 2026 (114 records). None shows a change of registrant. 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
No registrant changes recorded, 2017–2026
Zone file
Nameservers: dnspark.netFeb 16, 2017 – Aug 4, 2017Registration records listed dnspark.net nameservers (ns1.dnspark.net, ns3.dnspark.net, ns5.dnspark.net) for siam.org from Feb 16, 2017 to Aug 4, 2017.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
DigiCert IncDigiCert IncAug 6, 2025 – Nov 7, 2026DigiCert Inc issued 9 certificates for siam.org from Aug 6, 2025, the latest valid until Feb 20, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)AmazonFeb 3, 2026 – Nov 7, 2026
2010201520202025Apr ’26← last 12 months, drawn wider
Every dated fact on this lifeline (19)
Jun 21, 2006 – Nov 6, 2013AboutUs record: An AboutUs wiki page described siam.org from Jun 21, 2006 to Nov 6, 2013 (5 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “SIAM exists to ensure the strongest interactions between mathematics and other scientific and technological communities through membership activities, publication of journals and books, and conferences.”Source: AboutUs wiki archive, 2006
Jul 1, 2012AboutUs record: “Applied mathematics, in partnership with computational science, is essential in solving many real-world problems. Our mission is to build cooperation between mathematics and the worlds of science and technology through …”Source: AboutUs wiki archive, 2012
Feb 16, 2017 – Jun 26, 2026Registrar: Registrar TUCOWS, INC. (IANA 69) in the WHOIS and RDAP records held for siam.org, from Feb 16, 2017 to Jun 26, 2026.Source: WHOIS / RDAP archive (who.is)
Feb 16, 2017 – Jun 26, 2026Registrant: Registration records for siam.org are held from Feb 16, 2017 to Jun 26, 2026 (114 records). None shows a change of registrant. 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
Said about itself in 2012Jul 1, 2012“Applied mathematics, in partnership with computational science, is essential in solving many real-world problems. Our mission is to build cooperation between mathematics and the worlds of science and technology through …”Source: AboutUs wiki archive, 2012
Current AboutUs recordJun 26, 2026 – Aug 21, 2026 (latest)Authority and Safety last refreshed Aug 21, 2026.Source: AboutUs checks
Tucows Domains Inc.
Aug 17, 2026 – Nov 5, 2026 (latest)
Registrar Tucows Domains Inc. in the registration data recorded, first on Aug 17, 2026 and most recently on Nov 5, 2026.
Source: RDAP, fetched Jun 26, 2026
Nameservers: dnspark.com, dnspark.net
Dec 16, 2017
Registration records listed dnspark.com, dnspark.net nameservers (ns1.dnspark.com, ns2.dnspark.net) for siam.org from Dec 16, 2017 to Dec 16, 2017.
Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to dnspark.com, dnspark.netDec 16, 2017siam.org's nameservers moved from dnspark.net to dnspark.com, dnspark.net at some point between Aug 4, 2017 and Dec 16, 2017. Last seen at dnspark.net: Aug 4, 2017 (registration record). First seen at dnspark.com, dnspark.net: Dec 16, 2017 (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 (registration record → registration record)
Nameservers: DNS Made EasyAug 10, 2018 – Apr 13, 2019Registration records listed DNS Made Easy nameservers (ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com…) for siam.org from Aug 10, 2018 to Apr 13, 2019.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to DNS Made EasyAug 10, 2018siam.org's nameservers moved from dnspark.com, dnspark.net to DNS Made Easy at some point between Dec 16, 2017 and Aug 10, 2018. Last seen at dnspark.com, dnspark.net: Dec 16, 2017 (registration record). First seen at DNS Made Easy: Aug 10, 2018 (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: CloudflareNameservers: CloudflareMay 16, 2019 – Jun 26, 2026Registration records listed Cloudflare nameservers (alice.ns.cloudflare.com, karl.ns.cloudflare.com) for siam.org from May 16, 2019 to Jun 26, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to CloudflareMay 16, 2019siam.org's nameservers moved from DNS Made Easy to Cloudflare between Apr 13, 2019 and May 16, 2019. Last seen at DNS Made Easy: Apr 13, 2019 (registration record). First seen at Cloudflare: May 16, 2019 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Amazon issued 2 certificates for siam.org from Feb 3, 2026, the latest valid until Mar 4, 2027.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Let's EncryptApr 5, 2026 – Nov 7, 2026Let's Encrypt issued 65 certificates for siam.org from Apr 5, 2026, the latest valid until Feb 2, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Google Trust ServicesApr 6, 2026 – Nov 7, 2026 (latest)Google Trust Services issued 63 certificates for siam.org from Apr 6, 2026, the latest valid until Jan 25, 2027. Seen in use on Nov 6, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Nov 6, 2026
Sectigo LimitedJun 6, 2026 – Sep 6, 2026Sectigo Limited issued 2 certificates for siam.org from Jun 6, 2026, the latest valid until Sep 6, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Feb 16, 2017 – Aug 4, 2017Zone file: Registration records listed dnspark.net nameservers (ns1.dnspark.net, ns3.dnspark.net, ns5.dnspark.net) for siam.org from Feb 16, 2017 to Aug 4, 2017.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 16, 2017Zone file: Registration records listed dnspark.com, dnspark.net nameservers (ns1.dnspark.com, ns2.dnspark.net) for siam.org from Dec 16, 2017 to Dec 16, 2017.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 16, 2017Zone file: siam.org's nameservers moved from dnspark.net to dnspark.com, dnspark.net at some point between Aug 4, 2017 and Dec 16, 2017. Last seen at dnspark.net: Aug 4, 2017 (registration record). First seen at dnspark.com, dnspark.net: Dec 16, 2017 (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 (registration record → registration record)
Aug 10, 2018 – Apr 13, 2019Zone file: Registration records listed DNS Made Easy nameservers (ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com…) for siam.org from Aug 10, 2018 to Apr 13, 2019.Source: From registration records (WHOIS / RDAP archive, who.is)
Aug 10, 2018Zone file: siam.org's nameservers moved from dnspark.com, dnspark.net to DNS Made Easy at some point between Dec 16, 2017 and Aug 10, 2018. Last seen at dnspark.com, dnspark.net: Dec 16, 2017 (registration record). First seen at DNS Made Easy: Aug 10, 2018 (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)
May 16, 2019 – Jun 26, 2026Zone file: Registration records listed Cloudflare nameservers (alice.ns.cloudflare.com, karl.ns.cloudflare.com) for siam.org from May 16, 2019 to Jun 26, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
May 16, 2019Zone file: siam.org's nameservers moved from DNS Made Easy to Cloudflare between Apr 13, 2019 and May 16, 2019. Last seen at DNS Made Easy: Apr 13, 2019 (registration record). First seen at Cloudflare: May 16, 2019 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Aug 6, 2025 – Nov 7, 2026Certificate: DigiCert Inc issued 9 certificates for siam.org from Aug 6, 2025, the latest valid until Feb 20, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Feb 3, 2026 – Nov 7, 2026Certificate: Amazon issued 2 certificates for siam.org from Feb 3, 2026, the latest valid until Mar 4, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Apr 5, 2026 – Nov 7, 2026Certificate: Let's Encrypt issued 65 certificates for siam.org from Apr 5, 2026, the latest valid until Feb 2, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Apr 6, 2026 – Nov 7, 2026Certificate: Google Trust Services issued 63 certificates for siam.org from Apr 6, 2026, the latest valid until Jan 25, 2027. Seen in use on Nov 6, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Nov 6, 2026
Jun 6, 2026 – Sep 6, 2026Certificate: Sectigo Limited issued 2 certificates for siam.org from Jun 6, 2026, the latest valid until Sep 6, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jun 26, 2026 – Aug 21, 2026AboutUs record: Authority and Safety last refreshed Aug 21, 2026.Source: AboutUs checks
Aug 17, 2026 – Nov 5, 2026Registrar: Registrar Tucows Domains Inc. in the registration data recorded, first on Aug 17, 2026 and most recently on Nov 5, 2026.Source: RDAP, fetched Jun 26, 2026
The site's bot protection blocked AboutUs's HTTPS check; all 1 of the other checks passed (Nov 7, 2026).
Registered 1991 · AboutUs's live check was blocked by the site's bot protection
SiAM.org is The Society for Industrial and Applied Mathematics website
About SIAM Applied mathematics, in partnership with computational science, is essential in solving many real-world problems.
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 Aug 27, 1991 — 35 years old.
latest result
Registrar on record: Tucows Domains Inc. — unchanged since AboutUs began tracking (Aug 17, 2026).
Authority 65/100— ahead of 65% of the August 2026 scored sampleClear
Why this authority score
65 is a percentile: higher than 65% of sites we score.
How it's calculated
Prominence (Tranco rank #23,927)+7
Verified continuity: 35.2 years (RDAP registration)+11
Security & email hygiene+2
Calibration adjustment (published map)+13
Model score: 33/99 — what these reason lines add up to.
Published Authority (percentile): 65/100 — 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 78 days ago); 3/3 transport and email checks available (oldest recorded about 78 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 siam.org said about itself, 2006–2012
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
SIAM exists to ensure the strongest interactions between mathematics and other scientific and technological communities through membership activities, publication of journals and books, and conferences.
2012
Applied mathematics, in partnership with computational science, is essential in solving many real-world problems. Our mission is to build cooperation between mathematics and the worlds of science and technology through our publications, research, and community.rewritten
Site history
Dated record — historical facts always carry their date; self-description below is the 2013 record.
1991
Domain registered (Aug 27, 1991).
2006
First tracked by AboutUs (Jun 21, 2006); profile edited 5 times through 2013.
2013
Self-description at the time:
“SiAM.org is The Society for Industrial and Applied Mathematics website”
2026
Checked today — The site's bot protection blocked AboutUs's HTTPS check; all 1 of the other checks passed (Nov 7, 2026).
✓ domain continuity 35 years registered– live check blocked the site's bot protection turned the check away Nov 7, 2026