Verifying against the live site and live WHOIS/DNS…
Common questions
Is oreilly.com legit or a scam?
oreilly.com was registered May 27, 1997 (29 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 oreilly.com?
Nobody has completed AboutUs's owner verification for oreilly.com. That's true of most sites here — it isn't itself a warning sign.
When was oreilly.com registered?
oreilly.com's registration dates to May 27, 1997 (29 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 1997 · site is live · HTTPS valid
O'Reilly Media publishes books, online services, magazines, and conferences focused on technology and software development. The company serves technologists, developers, and early adopters seeking information on emerging technology trends. O'Reilly is known for its animal-branded technical books and for organizing conferences that convene technology leaders and innovators.
Authority 97/100— ahead of 97% of the August 2026 scored sampleClear
Why this authority score
97 is a percentile: higher than 97% of sites we score.
How it's calculated
Prominence (Tranco rank #1,966)+11
Verified continuity: 29.4 years (RDAP registration)+11
Identity corroboration (capped)+4
Security & email hygiene+5
Calibration adjustment (published map)+20
Model score: 51/99 — what these reason lines add up to.
Published Authority (percentile): 97/100 — this site's rank against the August 2026 scored sample. Public Authority is capped at 99.
What oreilly.com 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
O'Reilly Media spreads the knowledge of innovators through its books, online services, magazine, and conferences. Since 1978, O'Reilly has been a chronicler and catalyst of leading-edge development, homing in on the technology trends that really matter and spurring their adoption by amplifying "faint signals" from the alpha geeks who are creating the future.
2007
O'Reilly Media spreads the knowledge of innovators through its books, online services, magazine, and conferences.Since 1978, O'Reilly has been a chronicler and catalyst of leading-edge development, homing in on the technology trends that really matter and spurring their adoption by amplifying "faint signals" from the alpha geeks who are creating the future.
Now
O'Reilly Media publishes books, online services, magazines, and conferences focused on technology and software development. The company serves technologists, developers, and early adopters seeking information on emerging technology trends. O'Reilly is known for its animal-branded technical books and for organizing conferences that convene technology leaders and innovators.
Site history
Dated record — historical facts always carry their date.
1997
Domain registered (May 27, 1997).
2006
First tracked by AboutUs (Jun 21, 2006); profile edited 18 times through 2011.
✓ domain continuity 29 years registered✓ live verified Oct 26, 2026
Safety evidence
No unexpired threat-feed result; name-similarity check available (recorded about 1 days ago); 3/3 transport and email checks available (oldest recorded about 1 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
AboutUs summary of the current website, Sep 30, 2026.
Lifeline · oreilly.com over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 29 years ago · on AboutUs since 2006 · one registrar since Jul 17, 2011 · no ownership change on record since 2007 · last checked Oct 25, 2026.
Registration
RegisteredMay 27, 1997oreilly.com was registered on May 27, 1997.Source: RDAP, fetched Oct 25, 2026
AboutUs record
AboutUs wiki pageJun 21, 2006 – Jan 31, 2011An AboutUs wiki page described oreilly.com from Jun 21, 2006 to Jan 31, 2011 (18 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006Jul 1, 2006
Registrar
GoDaddy.com, LLCGoDaddy.com, LLCJul 17, 2011 – Oct 17, 2026 (latest)Registrar GoDaddy.com, LLC (IANA 146) in the registration data recorded, first on Jul 17, 2011 and most recently on Oct 17, 2026.Source: RDAP, fetched Oct 25, 2026
Ownership
Ownership recordsMay 11, 2007 – Jun 22, 2026Registration records for oreilly.com are held from May 11, 2007 to Jun 22, 2026 (601 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, 2007–2026
Zone file
Nameservers: oreilly.comJul 17, 2011 – Oct 17, 2013Registration records listed oreilly.com nameservers (nsautha.oreilly.com, nsauthb.oreilly.com) for oreilly.com from Jul 17, 2011 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)
Certificate
Let's EncryptJul 23, 2026 – Oct 26, 2026 (latest)Let's Encrypt issued 93 certificates for oreilly.com from Jul 23, 2026, the latest valid until Jan 22, 2027. Seen in use on Oct 8, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 8, 2026
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (19)
May 27, 1997Registration: oreilly.com was registered on May 27, 1997.Source: RDAP, fetched Oct 25, 2026
Jun 21, 2006 – Jan 31, 2011AboutUs record: An AboutUs wiki page described oreilly.com from Jun 21, 2006 to Jan 31, 2011 (18 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “O'Reilly Media spreads the knowledge of innovators through its books, online services, magazine, and conferences. Since 1978, O'Reilly has been a chronicler and catalyst of leading-edge development, homing in on the tec…”Source: AboutUs wiki archive, 2006
May 11, 2007 – Jun 22, 2026Ownership: Registration records for oreilly.com are held from May 11, 2007 to Jun 22, 2026 (601 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
Jul 1, 2007AboutUs record: “O'Reilly Media spreads the knowledge of innovators through its books, online services, magazine, and conferences.”Source: AboutUs wiki archive, 2007
Jul 17, 2011 – Oct 17, 2026Registrar GoDaddy.com, LLC (IANA 146) in the registration data recorded, first on Jul 17, 2011 and most recently on Oct 17, 2026.
“O'Reilly Media spreads the knowledge of innovators through its books, online services, magazine, and conferences. Since 1978, O'Reilly has been a chronicler and catalyst of leading-edge development, homing in on the tec…”
Source: AboutUs wiki archive, 2006
Said about itself in 2007Jul 1, 2007“O'Reilly Media spreads the knowledge of innovators through its books, online services, magazine, and conferences.”Source: AboutUs wiki archive, 2007
Current AboutUs recordJun 19, 2026 – Oct 25, 2026 (latest)Authority and Safety last refreshed Oct 25, 2026.Source: AboutUs checks
Nameservers: oreilly.com
Oct 18, 2013 – Mar 27, 2015
oreilly.com (nsautha.oreilly.com, nsauthb.oreilly.com) were the nameservers listed for oreilly.com at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Mar 27, 2015 (snapshots exist for only part of 2013–2018).
Nameservers: oreilly.comMar 28, 2015 – Jun 7, 2015Registration records listed oreilly.com nameservers (nsautha.oreilly.com, nsauthb.oreilly.com) for oreilly.com from Mar 28, 2015 to Jun 7, 2015. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Nameservers: AkamaiSep 23, 2015 – Apr 3, 2018Akamai (a1-225.akam.net, a13-64.akam.net, a16-65.akam.net…) were the nameservers listed for oreilly.com at every ICANN zone-file snapshot AboutUs holds from Sep 23, 2015 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
DNS moved to AkamaiSep 23, 2015oreilly.com's nameservers moved from oreilly.com to Akamai at some point between Jun 7, 2015 and Sep 23, 2015. Last seen at oreilly.com: Jun 7, 2015 (registration record). First seen at Akamai: Sep 23, 2015 (ICANN zone-file snapshot). 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 → ICANN zone-file snapshot)
Nameservers: AkamaiNameservers: AkamaiApr 4, 2018 – Jun 22, 2026Registration records listed Akamai nameservers (a1-225.akam.net, a13-64.akam.net, a16-65.akam.net…) for oreilly.com from Apr 4, 2018 to Jun 22, 2026. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Seen in the .com zone fileSep 8, 2026 – Sep 24, 2026 (latest)First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Sep 24, 2026. Nameservers on Sep 24, 2026: a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a20-66.akam.net….Source: ICANN CZDS zone file, snapshot Sep 24, 2026
Amazon
Jul 26, 2026 – Oct 26, 2026
Amazon issued 7 certificates for oreilly.com from Jul 26, 2026, the latest valid until May 4, 2027.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Google Trust ServicesJul 31, 2026 – Oct 26, 2026Google Trust Services issued 35 certificates for oreilly.com from Jul 31, 2026, the latest valid until Jan 24, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
GoDaddy.comAug 13, 2026 – Oct 26, 2026GoDaddy.com issued 7 certificates for oreilly.com from Aug 13, 2026, the latest valid until Apr 9, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
DigiCert IncAug 27, 2026 – Oct 26, 2026DigiCert Inc issued 8 certificates for oreilly.com from Aug 27, 2026, the latest valid until Apr 28, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Registrar:
Source: RDAP, fetched Oct 25, 2026
Jul 17, 2011 – Oct 17, 2013Zone file: Registration records listed oreilly.com nameservers (nsautha.oreilly.com, nsauthb.oreilly.com) for oreilly.com from Jul 17, 2011 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)
Oct 18, 2013 – Mar 27, 2015Zone file: oreilly.com (nsautha.oreilly.com, nsauthb.oreilly.com) were the nameservers listed for oreilly.com at every ICANN zone-file snapshot AboutUs holds from Oct 18, 2013 to Mar 27, 2015 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Mar 28, 2015 – Jun 7, 2015Zone file: Registration records listed oreilly.com nameservers (nsautha.oreilly.com, nsauthb.oreilly.com) for oreilly.com from Mar 28, 2015 to Jun 7, 2015. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Sep 23, 2015 – Apr 3, 2018Zone file: Akamai (a1-225.akam.net, a13-64.akam.net, a16-65.akam.net…) were the nameservers listed for oreilly.com at every ICANN zone-file snapshot AboutUs holds from Sep 23, 2015 to Apr 3, 2018 (snapshots exist for only part of 2013–2018).Source: ICANN zone-file snapshots, 2013–2018 (legacy archive)
Sep 23, 2015Zone file: oreilly.com's nameservers moved from oreilly.com to Akamai at some point between Jun 7, 2015 and Sep 23, 2015. Last seen at oreilly.com: Jun 7, 2015 (registration record). First seen at Akamai: Sep 23, 2015 (ICANN zone-file snapshot). 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 → ICANN zone-file snapshot)
Apr 4, 2018 – Jun 22, 2026Zone file: Registration records listed Akamai nameservers (a1-225.akam.net, a13-64.akam.net, a16-65.akam.net…) for oreilly.com from Apr 4, 2018 to Jun 22, 2026. Days a zone file covers are shown from the zone file instead.Source: From registration records (WHOIS / RDAP archive, who.is)
Jun 19, 2026 – Oct 25, 2026AboutUs record: Authority and Safety last refreshed Oct 25, 2026.Source: AboutUs checks
Jul 23, 2026 – Oct 26, 2026Certificate: Let's Encrypt issued 93 certificates for oreilly.com from Jul 23, 2026, the latest valid until Jan 22, 2027. Seen in use on Oct 8, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 8, 2026
Jul 26, 2026 – Oct 26, 2026Certificate: Amazon issued 7 certificates for oreilly.com from Jul 26, 2026, the latest valid until May 4, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 31, 2026 – Oct 26, 2026Certificate: Google Trust Services issued 35 certificates for oreilly.com from Jul 31, 2026, the latest valid until Jan 24, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Aug 13, 2026 – Oct 26, 2026Certificate: GoDaddy.com issued 7 certificates for oreilly.com from Aug 13, 2026, the latest valid until Apr 9, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Aug 27, 2026 – Oct 26, 2026Certificate: DigiCert Inc issued 8 certificates for oreilly.com from Aug 27, 2026, the latest valid until Apr 28, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Sep 8, 2026 – Sep 24, 2026Zone file: First seen in the .com zone file records AboutUs holds on Sep 8, 2026; latest sighting Sep 24, 2026. Nameservers on Sep 24, 2026: a1-225.akam.net, a13-64.akam.net, a16-65.akam.net, a20-66.akam.net….Source: ICANN CZDS zone file, snapshot Sep 24, 2026