Opencourser.com OpenCourser - Find free online courses and MOOCs

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Opencourser.com Overview

Opencourser.com ranking shows that the page is at position 556,881 over the world.

In terms of rank-to-traffic ratio, opencourser.com has 942 unique users per day, viewing 1,318 pages. The rank based value of opencourser.com is 12,627 USD. Every user makes 1.50 pageviews on average.

Opencourser.com boasts a link base consisting of 243 referring domains and 284 external backlinks, as revealed by the data obtained from web network scanning.

Opencourser.com top-level domain belongs to .COM domain zone. Check other webpages in .COM zone.

According the last verification test in October 06, 2024, opencourser.com has an expired SSL certificate issued by Google Trust Services (expired on November 19, 2024). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by Google Trust Services.

Based on data from Google Safe Browsing, Google Safe Search and Symantec opencourser.com is a fairly safe domain.

According the Mobile-Friendly test by Google opencourser.com is nice optimized for mobile devices and tablets, however the webpage speed could be improved.

Opencourser.com Rank Summary

Global Rank

556,881

Average Load Time

2.19sec

Links In Count

Website Value

$11,692

Audience Geography. Where are opencourser.com visitors located?

Country	Visitors

Country	Pageviews

Country	Rank

Where do visitors go on opencourser.com?

Subdomain	Pageviews
opencourser.com	100%

Subdomain	Pageviews per User
opencourser.com	1

Subdomain	Reach
opencourser.com	100%

How popular is opencourser.com?

Period	Global Rank	Global Rank Delta
past 3 months	556881	-40289
past month	692712	147292
past week	533583	-375611

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	810531	4863	4	6%	1.4	-13.38%
30	943697	147444	3	-19.73%	1	5%
7	652652	-482310	5	200%	2	40%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	482984	-59914	1	20%
30	608293	137334	81	-23.62%
7	506876	-285039	1	90%

Opencourser.com Website Safety

Overview

Last Updated: 07/24/2026

Overall result - opencourser.com is safe.

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: 03/19/2026

opencourser.com is safe.

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

Google Safe Search

Last Updated: 06/03/2017

opencourser.com is safe.

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

opencourser.com is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

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: 02/18/2021

opencourser.com is safe.

McAfee assesses opencourser.com 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 opencourser.com for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 07/24/2026

opencourser.com child safety is unknown.

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

SSL Information

SSL Checker Tool

Domain	opencourser.com
Issuer Organization	Google Trust Services
Issuer	WE1
Algorithm	ecdsa-with-SHA256
Valid form	08/21/2024
Expiration	11/19/2024
Signed	Certificate is not self signed
Additional Domains	opencourser.com *.opencourser.com

Opencourser.com Rank History

Alexa Rank shows how popular opencourser.com is in comparison with other sites. The most popular site has Alexa Rank equals 1. If opencourser.com 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 opencourser.com and pageviews on opencourser.com over the past 3 months.

Opencourser.com Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 13335

ASN Title: CLOUDFLARENET - Cloudflare, Inc., US

Last Update: 05/17/2026

#
# 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.
#

Opencourser.com Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: OPENCOURSER.COM
Registry Domain ID: 2077508444_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.namecheap.com
Registrar URL: http://www.namecheap.com
Updated Date: 2022-07-05T00:21:30Z
Creation Date: 2016-11-28T17:01:44Z
Registry Expiry Date: 2031-11-28T17:01:44Z
Registrar: NameCheap, Inc.
Registrar IANA ID: 1068
Registrar Abuse Contact Email: abuse@namecheap.com
Registrar Abuse Contact Phone: +1.6613102107
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: LADY.NS.CLOUDFLARE.COM
Name Server: MARK.NS.CLOUDFLARE.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2023-09-02T17:07:11Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Opencourser.com HTML Check

HTML Validation Tool

Errors

Attribute “name” not allowed on element “meta” at this point.

Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.

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

No “p” element in scope but a “p” end tag seen.

Duplicate ID “oc-search-input”.

Duplicate ID “oc-search-button”.

Duplicate ID “i-search”.

Duplicate ID “page-value”.

Duplicate ID “i-chevron-bottom”.

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

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

Warnings

The first occurrence of ID “oc-search-input” was here.

The first occurrence of ID “oc-search-button” was here.

The first occurrence of ID “i-search” was here.

The first occurrence of ID “page-value” was here.

The first occurrence of ID “i-chevron-bottom” was here.

Opencourser.com Desktop Performance

Last tested: 03/06/2019

Desktop Speed

47%

Optimize images

Leverage browser caching

Reduce server response time

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

Minify HTML

Desktop Resource Breakdown

Total Resources	40
Number of Hosts	10
Static Resources	34
JavaScript Resources	6
CSS Resources	2

Opencourser.com Mobile Insights

Last tested: 03/06/2019

Mobile Usability

98%

Size tap targets appropriately

Mobile Speed

46%

Optimize images

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

Leverage browser caching

Reduce server response time

Minify HTML

Mobile Resource Breakdown

Total Resources	40
Number of Hosts	10
Static Resources	34
JavaScript Resources	6
CSS Resources	2

Opencourser.com Common Typos

www.opencourser.com
www.opencourser.net
www.opencourser.org
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www.opencourser.con

Opencourser.com OpenCourser - Find free online courses and MOOCs

Search 20,000+ courses from the best schools and universities. Take online courses and MOOCs today. Learn your future with OpenCourser.

Opencourser.com Overview

Opencourser.com Rank Summary

Opencourser.com Website Safety

Opencourser.com Rank History

Opencourser.com Hosting Information

Opencourser.com Domain Registration and Settings

Opencourser.com HTML Check

Opencourser.com Desktop Performance

Opencourser.com Mobile Insights

Opencourser.com Similar Audits

Opencourser.com Common Typos