Verifying against the live site and live WHOIS/DNS…
Common questions
Is sourceforge.net legit or a scam?
sourceforge.net was registered Aug 8, 1999 (27 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 sourceforge.net?
Nobody has completed AboutUs's owner verification for sourceforge.net. That's true of most sites here — it isn't itself a warning sign.
When was sourceforge.net registered?
sourceforge.net's registration dates to Aug 8, 1999 (27 years old), per public registration records. GoDaddy.com, LLC is the registrar on record today.
Correct a description, link or other detail. Submissions are reviewed before publication.
Registered 1999 · site is live · HTTPS valid
Compare B2B Software, Download, & Develop Open Source & Business Software - SourceForge
SourceForge is a software discovery and hosting platform where developers create, share, and distribute open-source projects, and where buyers compare and review business software. The site hosts over 2.1 million registered users and serves more than 2.6 million software downloads daily, with a directory reaching over 20 million visitors.
Authority 93/100— ahead of 93% of the August 2026 scored sampleClear
Why this authority score
93 is a percentile: higher than 93% of sites we score.
How it's calculated
Prominence (Tranco rank #242)+11
Verified continuity: 27.3 years (RDAP registration)+11
Security & email hygiene+5
Calibration adjustment (published map)+20
Model score: 47/99 — what these reason lines add up to.
Published Authority (percentile): 93/100 — 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 6 days ago); 3/3 transport and email checks available (oldest recorded about 6 days ago). This is evidence coverage, not a probability that a website is safe.
What sourceforge.net said about itself, 2006–2007
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
SourceForge.net is the world's largest Open Source software development web site, hosting more than 100,000 projects and over 1,000,000 registered users with a centralized resource for managing projects, issues, communications, and code.
2007
SourceForge or SF.net is marketed by VA software. SourceForge offers it's customers a complete variety of software development facilities and merges with numerous open source and free software applications like CVS and PostgreSQL. SourceForge can be called a shared software development and supervision system. It is considered as another name of Open source projects.rewritten
Now
SourceForge is a software discovery and hosting platform where developers create, share, and distribute open-source projects, and where buyers compare and review business software. The site hosts over 2.1 million registered users and serves more than 2.6 million software downloads daily, with a directory reaching over 20 million visitors.
Site history
Dated record — historical facts always carry their date; self-description below is the 2013 record.
1999
Domain registered (Aug 8, 1999).
2006
First tracked by AboutUs (Jun 21, 2006); profile edited 23 times through 2013.
2013
Self-description at the time:
“SourceForge.net Offers Opensource free software to download & develope”
✓ domain continuity 27 years registered✓ live verified Nov 7, 2026
No caution flags in the available scoring observations; this is not a complete safety assessment
AboutUs summary of the current website, Sep 30, 2026.
Lifeline · sourceforge.net over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 27 years ago · on AboutUs since 2006 · 1 registrar change since Jun 25, 2007 · 7 registrant changes since 2007 · last checked Nov 1, 2026.
Registration
RegisteredAug 8, 1999sourceforge.net was registered on Aug 8, 1999.Source: RDAP, fetched Oct 25, 2026
AboutUs record
AboutUs wiki pageAboutUs wiki pageJun 21, 2006 – Nov 8, 2013An AboutUs wiki page described sourceforge.net from Jun 21, 2006 to Nov 8, 2013 (23 edits).Source: AboutUs wiki archive, 2006–2023
Registrar
TUCOWS, INC.TUCOWS, INC.Jun 25, 2007 – Sep 3, 2020Registrar TUCOWS, INC. (IANA 69) in the WHOIS and RDAP records held for sourceforge.net, from Jun 25, 2007 to Sep 3, 2020.Source: WHOIS / RDAP archive (who.is)GoDaddy.com, LLC
Registrant
Registrant recordsJun 25, 2007 – Jun 19, 2026Registration records for sourceforge.net are held from Jun 25, 2007 to Jun 19, 2026 (1,595 records). 7 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: ostg.com, vasoftware.comJun 25, 2007 – Oct 3, 2007Registration records listed ostg.com, vasoftware.com nameservers (ns1.ostg.com, ns1.vasoftware.com, ns2.ostg.com…) for sourceforge.net from Jun 25, 2007 to Oct 3, 2007.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
Let's EncryptSep 9, 2026 – Nov 7, 2026 (latest)Let's Encrypt issued 168 certificates for sourceforge.net from Sep 9, 2026, the latest valid until Feb 5, 2027. Seen in use on Oct 30, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 30, 2026
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (32)
Aug 8, 1999Registration: sourceforge.net was registered on Aug 8, 1999.Source: RDAP, fetched Oct 25, 2026
Jun 21, 2006 – Nov 8, 2013AboutUs record: An AboutUs wiki page described sourceforge.net from Jun 21, 2006 to Nov 8, 2013 (23 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “SourceForge.net is the world's largest Open Source software development web site, hosting more than 100,000 projects and over 1,000,000 registered users with a centralized resource for managing projects, issues, communi…”Source: AboutUs wiki archive, 2006
Jun 25, 2007 – Sep 3, 2020Registrar: Registrar TUCOWS, INC. (IANA 69) in the WHOIS and RDAP records held for sourceforge.net, from Jun 25, 2007 to Sep 3, 2020.Source: WHOIS / RDAP archive (who.is)
Jun 25, 2007 – Jun 19, 2026Registrant: Registration records for sourceforge.net are held from Jun 25, 2007 to Jun 19, 2026 (1,595 records). 7 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
Said about itself in 2006
Jul 1, 2006
“SourceForge.net is the world's largest Open Source software development web site, hosting more than 100,000 projects and over 1,000,000 registered users with a centralized resource for managing projects, issues, communi…”
Source: AboutUs wiki archive, 2006
Said about itself in 2007Jul 1, 2007“SourceForge or SF.net is marketed by VA software. SourceForge offers it's customers a complete variety of software development facilities and merges with numerous open source and free software applications like CVS and …”Source: AboutUs wiki archive, 2007
Current AboutUs recordJun 16, 2026 – Nov 1, 2026 (latest)Authority and Safety last refreshed Nov 1, 2026.Source: AboutUs checks
GoDaddy.com, LLC
Sep 22, 2020 – Nov 6, 2026 (latest)
Registrar GoDaddy.com, LLC (IANA 146) in the registration data recorded, first on Sep 22, 2020 and most recently on Nov 6, 2026.
Source: RDAP, fetched Oct 25, 2026
Registrant changeNov 2, 2007The registrant name or organization in the registration record changed; first recorded Nov 2, 2007. 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 changeDec 31, 2009The registrant name or organization in the registration record changed; first recorded Dec 31, 2009. 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 changeFeb 17, 2013The registrant name or organization in the registration record changed; first recorded Feb 17, 2013. 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 changeApr 5, 2013The registrant name or organization in the registration record changed; first recorded Apr 5, 2013. 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 changeJun 18, 2016The registrant name or organization in the registration record changed; first recorded Jun 18, 2016. 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 changeSep 22, 2020The registrant name or organization in the registration record changed; first recorded Sep 22, 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 changeOct 16, 2020The registrant name or organization in the registration record changed; first recorded Oct 16, 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
7 registrant changes, 2007–2026
Nameservers: ostg.com
Nov 2, 2007 – Oct 5, 2008
Registration records listed ostg.com nameservers (ns1.ostg.com, ns2.ostg.com, ns3.ostg.com) for sourceforge.net from Nov 2, 2007 to Oct 5, 2008.
Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to ostg.comNov 2, 2007sourceforge.net's nameservers moved from ostg.com, vasoftware.com to ostg.com between Oct 3, 2007 and Nov 2, 2007. Last seen at ostg.com, vasoftware.com: Oct 3, 2007 (registration record). First seen at ostg.com: Nov 2, 2007 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: sourceforge.comOct 7, 2008 – Apr 23, 2012Registration records listed sourceforge.com nameservers (ns-1.ch3.sourceforge.com, ns-2.ch3.sourceforge.com, ns-3.corp.sourceforge.com) for sourceforge.net from Oct 7, 2008 to Apr 23, 2012.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to sourceforge.comOct 7, 2008sourceforge.net's nameservers moved from ostg.com to sourceforge.com between Oct 5, 2008 and Oct 7, 2008. Last seen at ostg.com: Oct 5, 2008 (registration record). First seen at sourceforge.com: Oct 7, 2008 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: Oracle DynApr 26, 2012 – Oct 17, 2013Registration records listed Oracle Dyn nameservers (ns1.p03.dynect.net, ns2.p03.dynect.net, ns3.p03.dynect.net…) for sourceforge.net from Apr 26, 2012 to Oct 17, 2013. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to Oracle DynApr 26, 2012sourceforge.net's nameservers moved from sourceforge.com to Oracle Dyn between Apr 23, 2012 and Apr 26, 2012. Last seen at sourceforge.com: Apr 23, 2012 (registration record). First seen at Oracle Dyn: Apr 26, 2012 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: Oracle DynOct 18, 2013 – Apr 1, 2016Oracle Dyn (ns1.p03.dynect.net, ns2.p03.dynect.net, ns3.p03.dynect.net…) were the nameservers listed for sourceforge.net at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Apr 1, 2016 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Nameservers: DNS Made EasyJun 18, 2016 – Sep 2, 2016Registration records listed DNS Made Easy nameservers (ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com…) for sourceforge.net from Jun 18, 2016 to Sep 2, 2016. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to DNS Made EasyJun 18, 2016sourceforge.net's nameservers moved from Oracle Dyn to DNS Made Easy at some point between Apr 1, 2016 and Jun 18, 2016. Last seen at Oracle Dyn: Apr 1, 2016 (ICANN zone-file snapshot). First seen at DNS Made Easy: Jun 18, 2016 (registration record). AboutUs holds no nameserver records for the 3 months in between, so the date of the move is not known more closely.Source: Derived from the nameserver records on this lifeline (ICANN zone-file snapshot → registration record)
Nameservers: DNS Made EasySep 3, 2016 – Apr 3, 2018DNS Made Easy (ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com…) were the nameservers listed for sourceforge.net at every ICANN zone-file snapshot AboutUs holds from Sep 3, 2016 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Nameservers: DNS Made EasyNameservers: DNS Made EasyApr 4, 2018 – Nov 2, 2022Registration records listed DNS Made Easy nameservers (ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com…) for sourceforge.net from Apr 4, 2018 to Nov 2, 2022. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: constellix.com, constellix.netNameservers: constellix.com, constellix.netNov 17, 2022 – Jun 19, 2026Registration records listed constellix.com, constellix.net nameservers (ns11.constellix.com, ns21.constellix.com, ns31.constellix.com…) for sourceforge.net from Nov 17, 2022 to Jun 19, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to constellix.com, constellix.netNov 17, 2022sourceforge.net's nameservers moved from DNS Made Easy to constellix.com, constellix.net between Nov 2, 2022 and Nov 17, 2022. Last seen at DNS Made Easy: Nov 2, 2022 (registration record). First seen at constellix.com, constellix.net: Nov 17, 2022 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
ZeroSSL GmbH
Sep 12, 2026 – Nov 7, 2026
ZeroSSL GmbH issued 9 certificates for sourceforge.net from Sep 12, 2026, the latest valid until Feb 5, 2027.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
AmazonSep 14, 2026 – Nov 7, 2026Amazon issued 1 certificate for sourceforge.net from Sep 14, 2026, the latest valid until Mar 30, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jun 25, 2007 – Oct 3, 2007
Zone file: Registration records listed ostg.com, vasoftware.com nameservers (ns1.ostg.com, ns1.vasoftware.com, ns2.ostg.com…) for sourceforge.net from Jun 25, 2007 to Oct 3, 2007.Source: From registration records (WHOIS / RDAP archive, who.is)
Jul 1, 2007AboutUs record: “SourceForge or SF.net is marketed by VA software. SourceForge offers it's customers a complete variety of software development facilities and merges with numerous open source and free software applications like CVS and …”Source: AboutUs wiki archive, 2007
Nov 2, 2007Registrant: The registrant name or organization in the registration record changed; first recorded Nov 2, 2007. 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
Nov 2, 2007 – Oct 5, 2008Zone file: Registration records listed ostg.com nameservers (ns1.ostg.com, ns2.ostg.com, ns3.ostg.com) for sourceforge.net from Nov 2, 2007 to Oct 5, 2008.Source: From registration records (WHOIS / RDAP archive, who.is)
Nov 2, 2007Zone file: sourceforge.net's nameservers moved from ostg.com, vasoftware.com to ostg.com between Oct 3, 2007 and Nov 2, 2007. Last seen at ostg.com, vasoftware.com: Oct 3, 2007 (registration record). First seen at ostg.com: Nov 2, 2007 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Oct 7, 2008 – Apr 23, 2012Zone file: Registration records listed sourceforge.com nameservers (ns-1.ch3.sourceforge.com, ns-2.ch3.sourceforge.com, ns-3.corp.sourceforge.com) for sourceforge.net from Oct 7, 2008 to Apr 23, 2012.Source: From registration records (WHOIS / RDAP archive, who.is)
Oct 7, 2008Zone file: sourceforge.net's nameservers moved from ostg.com to sourceforge.com between Oct 5, 2008 and Oct 7, 2008. Last seen at ostg.com: Oct 5, 2008 (registration record). First seen at sourceforge.com: Oct 7, 2008 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Dec 31, 2009Registrant: The registrant name or organization in the registration record changed; first recorded Dec 31, 2009. 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 26, 2012 – Oct 17, 2013Zone file: Registration records listed Oracle Dyn nameservers (ns1.p03.dynect.net, ns2.p03.dynect.net, ns3.p03.dynect.net…) for sourceforge.net from Apr 26, 2012 to Oct 17, 2013. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Apr 26, 2012Zone file: sourceforge.net's nameservers moved from sourceforge.com to Oracle Dyn between Apr 23, 2012 and Apr 26, 2012. Last seen at sourceforge.com: Apr 23, 2012 (registration record). First seen at Oracle Dyn: Apr 26, 2012 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Feb 17, 2013Registrant: The registrant name or organization in the registration record changed; first recorded Feb 17, 2013. 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 5, 2013Registrant: The registrant name or organization in the registration record changed; first recorded Apr 5, 2013. 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
Oct 18, 2013 – Apr 1, 2016Zone file: Oracle Dyn (ns1.p03.dynect.net, ns2.p03.dynect.net, ns3.p03.dynect.net…) were the nameservers listed for sourceforge.net at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Apr 1, 2016 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Jun 18, 2016Registrant: The registrant name or organization in the registration record changed; first recorded Jun 18, 2016. 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
Jun 18, 2016 – Sep 2, 2016Zone file: Registration records listed DNS Made Easy nameservers (ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com…) for sourceforge.net from Jun 18, 2016 to Sep 2, 2016. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Jun 18, 2016Zone file: sourceforge.net's nameservers moved from Oracle Dyn to DNS Made Easy at some point between Apr 1, 2016 and Jun 18, 2016. Last seen at Oracle Dyn: Apr 1, 2016 (ICANN zone-file snapshot). First seen at DNS Made Easy: Jun 18, 2016 (registration record). AboutUs holds no nameserver records for the 3 months in between, so the date of the move is not known more closely.Source: Derived from the nameserver records on this lifeline (ICANN zone-file snapshot → registration record)
Sep 3, 2016 – Apr 3, 2018Zone file: DNS Made Easy (ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com…) were the nameservers listed for sourceforge.net at every ICANN zone-file snapshot AboutUs holds from Sep 3, 2016 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Apr 4, 2018 – Nov 2, 2022Zone file: Registration records listed DNS Made Easy nameservers (ns1.dnsmadeeasy.com, ns2.dnsmadeeasy.com, ns3.dnsmadeeasy.com…) for sourceforge.net from Apr 4, 2018 to Nov 2, 2022. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Sep 22, 2020 – Nov 6, 2026Registrar: Registrar GoDaddy.com, LLC (IANA 146) in the registration data recorded, first on Sep 22, 2020 and most recently on Nov 6, 2026.Source: RDAP, fetched Oct 25, 2026
Sep 22, 2020Registrant: The registrant name or organization in the registration record changed; first recorded Sep 22, 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
Oct 16, 2020Registrant: The registrant name or organization in the registration record changed; first recorded Oct 16, 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
Nov 17, 2022 – Jun 19, 2026Zone file: Registration records listed constellix.com, constellix.net nameservers (ns11.constellix.com, ns21.constellix.com, ns31.constellix.com…) for sourceforge.net from Nov 17, 2022 to Jun 19, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Nov 17, 2022Zone file: sourceforge.net's nameservers moved from DNS Made Easy to constellix.com, constellix.net between Nov 2, 2022 and Nov 17, 2022. Last seen at DNS Made Easy: Nov 2, 2022 (registration record). First seen at constellix.com, constellix.net: Nov 17, 2022 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Jun 16, 2026 – Nov 1, 2026AboutUs record: Authority and Safety last refreshed Nov 1, 2026.Source: AboutUs checks
Sep 9, 2026 – Nov 7, 2026Certificate: Let's Encrypt issued 168 certificates for sourceforge.net from Sep 9, 2026, the latest valid until Feb 5, 2027. Seen in use on Oct 30, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 30, 2026
Sep 12, 2026 – Nov 7, 2026Certificate: ZeroSSL GmbH issued 9 certificates for sourceforge.net from Sep 12, 2026, the latest valid until Feb 5, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Sep 14, 2026 – Nov 7, 2026Certificate: Amazon issued 1 certificate for sourceforge.net from Sep 14, 2026, the latest valid until Mar 30, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)