libretexts.org - LibreTexts - Free The Textbook

Quick Summary

Online Status

Offline

Server IP address resolved: No
Http response code: None
Last Checked: 02/14/2023

Libretexts.org receives about 426,340 unique visitors and 3,410,720 pageviews per day. The estimated value of libretexts.org is 3,683,880 USD. Each unique visitor makes about 8 pageviews on average.

Libretexts.org is registered under .ORG top-level domain. Check other websites in .ORG zone.

At the time of the last check (November 28, 2019) libretexts.org has an expired SSL certificate issued by Let's Encrypt (expired on January 01, 2020). Check other websites using SSL certificates issued by Let's Encrypt.

According to Google Safe Browsing and Symantec libretexts.org is quite a safe domain.

Mobile-Friendly test indicates that libretexts.org is well optimized for mobile and tablet devices.

Libretexts.org General Information

Not tested yet

Libretexts.org Alexa Rank History

Alexa Rank shows how popular libretexts.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If libretexts.org has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to libretexts.org and pageviews on libretexts.org over the past 3 months.

Libretexts.org Safety Information

Overview

Last Updated: 04/19/2024

Unknown status.
We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 03/21/2024

libretexts.org is safe.

Norton ConnectSafe evaluates libretexts.org for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 04/19/2024

Unknown status.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

Malware not found at "libretexts.org".
"libretexts.org" is not a phishing page.
"libretexts.org" does not install unwanted software.
"libretexts.org" does not contain harmfull applications.
Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 11/07/2021

libretexts.org is safe.

McAfee assesses libretexts.org for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze libretexts.org for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 04/19/2024

libretexts.org child safety isunknown.

The WOT calculates reputation of the libretexts.org. This reputation system receives ratings from users and information from third-party sources, assesses the libretexts.org for safety features and confirms, whether libretexts.org is suitable for children.

SSL Information

SSL Checker Tool

Domain	libretexts.org
Issuer Organization	Let's Encrypt
Issuer	Let's Encrypt Authority X3
Algorithm	RSA-SHA256
Valid form	10/03/2019
Expiration	01/01/2020
Signed	Certificate is not self signed
Additional Domains	libretexts.org

Libretexts.org Server Information

Server Location

Geolocation Tool

Not Found

ASN Information

ASN Lookup Tool

ASN ID: 13335
ASN Title: CLOUDFLARENET - Cloudflare, Inc., US

Last Update: 03/10/2024

ASN Whois

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

ASNumber: 13335
ASName: CLOUDFLARENET
ASHandle: AS13335
RegDate: 2010-07-14
Updated: 2017-02-17
Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref: https://rdap.arin.net/registry/autnum/13335

OrgName: Cloudflare, Inc.
OrgId: CLOUD14
Address: 101 Townsend Street
City: San Francisco
StateProv: CA
PostalCode: 94107
Country: US
RegDate: 2010-07-09
Updated: 2017-02-17
Comment: All Cloudflare abuse reporting can be done via https://www.cloudflare.com/abuse
Ref: https://rdap.arin.net/registry/entity/CLOUD14

OrgTechHandle: ADMIN2521-ARIN
OrgTechName: Admin
OrgTechPhone: +1-650-319-8930
OrgTechEmail: rir@cloudflare.com
OrgTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

OrgAbuseHandle: ABUSE2916-ARIN
OrgAbuseName: Abuse
OrgAbusePhone: +1-650-319-8930
OrgAbuseEmail: abuse@cloudflare.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

OrgNOCHandle: NOC11962-ARIN
OrgNOCName: NOC
OrgNOCPhone: +1-650-319-8930
OrgNOCEmail: noc@cloudflare.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN

RNOCHandle: NOC11962-ARIN
RNOCName: NOC
RNOCPhone: +1-650-319-8930
RNOCEmail: noc@cloudflare.com
RNOCRef: https://rdap.arin.net/registry/entity/NOC11962-ARIN

RTechHandle: ADMIN2521-ARIN
RTechName: Admin
RTechPhone: +1-650-319-8930
RTechEmail: rir@cloudflare.com
RTechRef: https://rdap.arin.net/registry/entity/ADMIN2521-ARIN

RAbuseHandle: ABUSE2916-ARIN
RAbuseName: Abuse
RAbusePhone: +1-650-319-8930
RAbuseEmail: abuse@cloudflare.com
RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE2916-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

Libretexts.org Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

Domain Name: libretexts.org
Registry Domain ID: c2b3ddc634124809bd69ca9ba8623db2-LROR
Registrar WHOIS Server: http://whois.google.com
Registrar URL: https://domains.google.com
Updated Date: 2022-09-05T22:17:16Z
Creation Date: 2016-07-22T22:17:14Z
Registry Expiry Date: 2023-07-22T22:17:14Z
Registrar: Google LLC
Registrar IANA ID: 895
Registrar Abuse Contact Email: registrar-abuse@google.com
Registrar Abuse Contact Phone: +1.8772376466
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Contact Privacy Inc. Customer 7151571251
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: ON
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: CA
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns1.digitalocean.com
Name Server: ns2.digitalocean.com
Name Server: ns3.digitalocean.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2022-10-11T06:13:20Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Libretexts.org HTML Validation

HTML Validation Tool

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

The “navigation” role is unnecessary for element “nav”.

A table row was 5 columns wide and exceeded the column count established by the first row (2).

A table row was 1 columns wide, which is less than the column count established by the first row (2).

The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.

The “contentinfo” role is unnecessary for element “footer”.

Errors

Bad value “45px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Attribute “width” not allowed on element “div” at this point.

The “width” attribute on the “table” element is obsolete. Use CSS instead.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

The “height” attribute on the “td” element is obsolete. Use CSS instead.

The “center” element is obsolete. Use CSS instead.

Attribute “height” not allowed on element “tr” at this point.

The “valign” attribute on the “tr” element is obsolete. Use CSS instead.

The “width” attribute on the “td” element is obsolete. Use CSS instead.

The “align” attribute on the “h1” element is obsolete. Use CSS instead.

The “bgcolor” attribute on the “td” element is obsolete. Use CSS instead.

The “font” element is obsolete. Use CSS instead.

Element “p” not allowed as child of element “font” in this context. (Suppressing further errors from this subtree.)

The “align” attribute on the “h3” element is obsolete. Use CSS instead.

Element “center” not allowed as child of element “font” in this context. (Suppressing further errors from this subtree.)

Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).

Stray end tag “div”.

Libretexts.org Desktop Insights

Desktop Page Insights Tool

Last tested: 03/08/2018

Desktop

Desktop Speed

77%

Leverage browser caching

Optimize images

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Minify JavaScript

Minify CSS

Minify HTML

Desktop Resource Breakdown

Total Resources	29
Number of Hosts	3
Static Resources	26
JavaScript Resources	9
CSS Resources	5

Libretexts.org Mobile Insights

Mobile Page Insights Tool

Last tested: 03/08/2018

Mobile

Mobile Usability

96%

Size content to viewport

Mobile Speed

66%

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Leverage browser caching

Optimize images

Minify JavaScript

Minify CSS

Minify HTML

Mobile Resource Breakdown

Total Resources	29
Number of Hosts	3
Static Resources	26
JavaScript Resources	9
CSS Resources	5

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Libretexts.org LibreTexts - Free The Textbook

LibreTexts is developing the next generation of open-access texts. Open. Free. Accessible to all.

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