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Lifeline · sigmobile.org over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 27 years ago · on AboutUs since 2006 · one registrar since Apr 6, 2018 · 2 registrant changes since 2018 · last checked Sep 5, 2026.
Registration
RegisteredFeb 18, 1999sigmobile.org was registered on Feb 18, 1999.Source: RDAP, fetched Sep 5, 2026
AboutUs record
AboutUs wiki pageAboutUs wiki pageJun 21, 2006 – Nov 5, 2013An AboutUs wiki page described sigmobile.org from Jun 21, 2006 to Nov 5, 2013 (3 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006
Registrar
Network Solutions, LLCNetwork Solutions, LLCApr 6, 2018 – Oct 16, 2026 (latest)Registrar Network Solutions, LLC (IANA 2) in the registration data recorded, first on Apr 6, 2018 and most recently on Oct 16, 2026.Source: RDAP, fetched Sep 5, 2026
Registrant
Registrant recordsApr 6, 2018 – Jun 13, 2026Registration records for sigmobile.org are held from Apr 6, 2018 to Jun 13, 2026 (62 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: DNS Made EasyNameservers: DNS Made EasyApr 6, 2018 – Jun 13, 2026Registration records listed DNS Made Easy nameservers (ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com…) for sigmobile.org from Apr 6, 2018 to Jun 13, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
Let's EncryptApr 29, 2026 – Nov 15, 2026Let's Encrypt issued 15 certificates for sigmobile.org from Apr 29, 2026, the latest valid until Feb 9, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (10)
Feb 18, 1999Registration: sigmobile.org was registered on Feb 18, 1999.Source: RDAP, fetched Sep 5, 2026
Jun 21, 2006 – Nov 5, 2013AboutUs record: An AboutUs wiki page described sigmobile.org from Jun 21, 2006 to Nov 5, 2013 (3 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “SIGMOBILE was formed in 1997 as a transitional ACM special interest group. In 2000, it became a fully accredited international ACM community of researchers and practitioners who:”Source: AboutUs wiki archive, 2006
Apr 6, 2018 – Oct 16, 2026Registrar: Registrar Network Solutions, LLC (IANA 2) in the registration data recorded, first on Apr 6, 2018 and most recently on Oct 16, 2026.Source: RDAP, fetched Sep 5, 2026
Apr 6, 2018 – Jun 13, 2026Registrant: Registration records for sigmobile.org are held from Apr 6, 2018 to Jun 13, 2026 (62 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
Apr 6, 2018 – Jun 13, 2026
Jul 1, 2006
“SIGMOBILE was formed in 1997 as a transitional ACM special interest group. In 2000, it became a fully accredited international ACM community of researchers and practitioners who:”
Source: AboutUs wiki archive, 2006
Current AboutUs recordJul 18, 2026 – Aug 27, 2026 (latest)Authority and Safety last refreshed Aug 27, 2026.Source: AboutUs checks
Registrant changeJun 24, 2020The registrant name or organization in the registration record changed; first recorded Jun 24, 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 changeAug 5, 2022The registrant name or organization in the registration record changed; first recorded Aug 5, 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, 2018–2026
Zone file: Registration records listed DNS Made Easy nameservers (ns10.dnsmadeeasy.com, ns11.dnsmadeeasy.com, ns12.dnsmadeeasy.com…) for sigmobile.org from Apr 6, 2018 to Jun 13, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Jun 24, 2020Registrant: The registrant name or organization in the registration record changed; first recorded Jun 24, 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
Aug 5, 2022Registrant: The registrant name or organization in the registration record changed; first recorded Aug 5, 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
Apr 29, 2026 – Nov 15, 2026Certificate: Let's Encrypt issued 15 certificates for sigmobile.org from Apr 29, 2026, the latest valid until Feb 9, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 18, 2026 – Aug 27, 2026AboutUs record: Authority and Safety last refreshed Aug 27, 2026.Source: AboutUs checks
Registered 1999 · site is live · HTTPS valid
sigmobile.org has an AboutUs profile for public website intelligence, ownership context, trust signals, monitoring, and owner verification.
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 80 days ago); 3/3 transport and email checks available (oldest recorded about 80 days ago). This is evidence coverage, not a probability that a website is safe.
Missing DMARC (mild)
What sigmobile.org 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
SIGMOBILE was formed in 1997 as a transitional ACM special interest group. In 2000, it became a fully accredited international ACM community of researchers and practitioners who:
Site history
Dated record — historical facts always carry their date.