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Gridlode
Rank #5,308Updated November 10, 2026

libretexts.org

Home | LibreTexts

libretexts.org is registered with Squarespace Domains II LLC since July 23, 2016 (10.3 years). The registration expires on July 23, 2027. The site runs on Drupal, WordPress, Cloudflare and 11 other technologies. Its email security grade is C. Its SSL certificate is issued by Google Trust Services and is valid for 71 more days.

Domain age
10.3 yrs
Technologies
14
Email security
C
SSL days left
71

Registration

RegistrarSquarespace Domains II LLC
IANA ID895
RegisteredJuly 23, 2016
ExpiresJuly 23, 2027
UpdatedAugust 12, 2026
Statusclient delete prohibited, client transfer prohibited
Name serversceline.ns.cloudflare.com, ridge.ns.cloudflare.com
DNSSECSigned

DNS records

TypeValueTTL
A104.20.33.226300
A172.66.163.119300
MXaspmx.l.google.com 1300
MXalt1.aspmx.l.google.com 5300
MXalt2.aspmx.l.google.com 5300
MXalt3.aspmx.l.google.com 10300
MXalt4.aspmx.l.google.com 10300
NSridge.ns.cloudflare.com86400
NSceline.ns.cloudflare.com86400
CAAiodef 0 mailto:[email protected]300
CAAissue 0 amazon.com300
CAAissue 0 comodoca.com300
CAAissue 0 digicert.com; cansignhttpexchanges=yes300
CAAissue 0 letsencrypt.org300
CAAissue 0 pki.goog; cansignhttpexchanges=yes300
CAAissue 0 sectigo.com300
CAAissue 0 ssl.com300
CAAissuewild 0 amazon.com300
CAAissuewild 0 amazonaws.com300
CAAissuewild 0 amazontrust.com300
CAAissuewild 0 awstrust.com300
TXTMS=24EEDA32A1B64093067F80942348F46B7C53AB15300
TXT1password-site-verification=YDXLXEOPD5A4RIQ4DGBXTTLXAU300
TXTgoogle-site-verification=ej-DagC8sD_MaouJikcyiz-sulM4oKdtg95K_XZJLjc300
TXTgoogle-site-verification=zIAad45IZShT-a7Q2GnGn7XjbofS1NobaXCuldPdF58300
TXTv=spf1 include:_spf.google.com include:mailgun.org include:spf.mailjet.com ~all300
TXTatlassian-domain-verification=K5DMrg/KPVIJcji/XYQ5GaWR5qtDtay27IEufDV87yqJmqX4uKhjhgZxNMajMm2w300
AAAA2606:4700:10::6814:21e2300
AAAA2606:4700:10::ac42:a377300

Technology stack

CDN
Cloudflare
CMS
DrupalWordPress
Fonts
Font AwesomeGoogle Fonts
JavaScript library
FancyboxjQueryOwl CarouselPopperSwiper
Page builder
Elementor
Programming language
PHP
UI framework
Bootstrap
Widgets
AddToAny

SSL certificate

ValidValid
IssuerUS, WE1, Google Trust Services
ExpiresJanuary 20, 2027
Days remaining71
ProtocolTLSv1.3
Nameslibretexts.org, davis.libretexts.org

Email security

CScore 77/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
  • warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
  • warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
  • warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
  • goodSPF record found.
  • goodSPF ends with ~all: servers you have not listed are marked as suspicious (soft fail).
  • goodDMARC policy is quarantine: failing mail goes to spam. Move to p=reject for full protection.
  • goodDMARC aggregate reports are sent to mailto:[email protected].
  • goodDKIM keys found (selector: google).
  • good5 MX record(s) found. Mail is handled by Google Workspace.

Homepage metadata

TitleHome | LibreTexts
Languageen
Canonicalhttps://libretexts.org/
IndexableYes
Word count2162

About libretexts.org

Who is the registrar of libretexts.org?

libretexts.org is registered with Squarespace Domains II LLC (IANA ID 895).

When does libretexts.org expire?

The current registration of libretexts.org expires on July 23, 2027. It was first registered on July 23, 2016.

What technology does libretexts.org use?

We detected 14 technologies on libretexts.org, including Cloudflare, Drupal, WordPress, Font Awesome, Google Fonts, Fancybox.

Does libretexts.org protect its email with SPF and DMARC?

libretexts.org scores 77/100 (grade C) for email security. No MTA-STS: mail sent to you can be downgraded to an unencrypted connection. No TLS-RPT record, so you won't hear about failed encrypted deliveries.

What are the name servers of libretexts.org?

libretexts.org uses ridge.ns.cloudflare.com, celine.ns.cloudflare.com.