Profile: Coursera coursera.org

View Coursera outages and uptime

Coursera is an online educational platform that offers massive open online courses.


  Uptime last 24 hours

  Response Time last 24 hours

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Current Status

Up

For 3 years, 2 months

(Jul 29, 2015 3:51 p.m. GMT)

Uptime

100%

Latest Downtime

None recorded

  Web Speed Test Results

Loading timeRequestsTotal SizePerformace GradeMobile Usability
8135 ms 111 2.1 MB 53/100 96/100
Location: Tokyo, Japan
Date: 2018-07-20 14:32
TypeURLSize
0.0 s
1.0 s
2.0 s
3.0 s
4.0 s
5.0 s
Other /
coursera.org
681 B
Document /
www.coursera.org
349.5 KB
Stylesheet /webapps/builds/front-page/app.2...
d3njjcbhbojbot.cloudfront.net
84.1 KB
Script /webapps/builds/dll/preloader.a0...
d3njjcbhbojbot.cloudfront.net
28.6 KB
Script /webapps/builds/dll/loader.34866...
d3njjcbhbojbot.cloudfront.net
189.2 KB
Script /webapps/builds/front-page/prelo...
d3njjcbhbojbot.cloudfront.net
1.1 KB
Script /webapps/builds/front-page/loade...
d3njjcbhbojbot.cloudfront.net
1.2 KB
Script /webapps/builds/front-page/en.ap...
d3njjcbhbojbot.cloudfront.net
1.0 MB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
2.0 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
3.5 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
5.6 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
5.2 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
4.6 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
4.6 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
2.7 KB
Image /web/images/icons/download_on_th...
d3njjcbhbojbot.cloudfront.net
5.1 KB
Image /web/images/icons/en_generic_rgb...
d3njjcbhbojbot.cloudfront.net
13.9 KB
Font /web/type/opensans/OpenSans-Bold...
d3njjcbhbojbot.cloudfront.net
10.6 KB
Font /web/bundles/styleguide/icons/fo...
d3njjcbhbojbot.cloudfront.net
22.4 KB
Font /web/type/opensans/OpenSans-Regu...
d3njjcbhbojbot.cloudfront.net
10.7 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
18.6 KB
Font /web/type/merriweather/Merriweat...
d3njjcbhbojbot.cloudfront.net
18.0 KB
Font /web/type/opensans/OpenSans-Semi...
d3njjcbhbojbot.cloudfront.net
10.6 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
15.8 KB
Font /web/type/opensans/OpenSans-Ligh...
d3njjcbhbojbot.cloudfront.net
10.5 KB
Image /api/utilities/v1/imageproxy/htt...
d3njjcbhbojbot.cloudfront.net
26.7 KB
Script /eventing/info.v2
www.coursera.org
549 B
Script /webapps/builds/dll/0.348662d477...
d3njjcbhbojbot.cloudfront.net
5.9 KB
Script /gtm.js
www.googletagmanager.com
33.3 KB
Script /webapps/builds/front-page/6.4c7...
d3njjcbhbojbot.cloudfront.net
13.4 KB
XHR /eventing/infoBatch.v2
www.coursera.org
642 B
Script /analytics.js
www.google-analytics.com
14.3 KB
Script /pagead/conversion_async.js
www.googleadservices.com
7.1 KB
Script /en_US/fbevents.js
connect.facebook.net
13.8 KB
Script /bat.js
bat.bing.com
6.9 KB
Script /113717.ct.js
intljs.rmtag.com
19.3 KB
Script /airpr.js
px.airpr.com
2.4 KB
Script /eventing/info.v2
www.coursera.org
548 B
Script /webapps/builds/front-page/en.2....
d3njjcbhbojbot.cloudfront.net
11.8 KB
Script /webapps/builds/front-page/0.53f...
d3njjcbhbojbot.cloudfront.net
4.7 KB
Script /signals/config/946401778754875
connect.facebook.net
14.2 KB
Script /pagead/viewthroughconversion/92...
googleads.g.doubleclick.net
1.5 KB
Document /xbbe/pixel
bid.g.doubleclick.net
424 B
Image /tr/
www.facebook.com
257 B
Image /action/0
bat.bing.com
148 B
Script /js/6577/
tags.rd.linksynergy.com
3.6 KB
Image /consent/v1/p
consent.linksynergy.com
238 B
Image /consent/v1/p
consent.nxtck.com
232 B
Image /consent/v1/p
consent.mediaforge.com
236 B
Image /consent/v1/p
consent.jrs5.com
232 B
Image /consent/v1/p
consent.dc-storm.com
235 B
XHR /eventing/infoBatch.v2
www.coursera.org
572 B
Document /tr/
www.facebook.com
63 B
Image /dcv4/lqs.aspx
ct1.ra.linksynergy.com
238 B
Image /dcv4/lqs.aspx
nyt2.dc-storm.com
186 B
Document /pix/6577
tags.rd.linksynergy.com
22.2 KB
Other /bounce
secure.adnxs.com
883 B
Script /act.php
act-us.rd.linksynergy.com
2.0 KB
Script /en_US/fbevents.js
connect.facebook.net
0 B
Script /signals/config/375767869524666
connect.facebook.net
14.6 KB
Image /tr/
www.facebook.com
200 B
Image /anpx
dpx.airpr.com
171 B
Other /track/evnt/
insight.adsrvr.org
523 B
Image /tap.php
pixel.rubiconproject.com
371 B
Other /ups/55953/sync
pixel.advertising.com
306 B
Other /ups/55953/sync
pixel.advertising.com
308 B
Other /track/evnt/
insight.adsrvr.org
560 B
Other /track/cmf/generic
match.adsrvr.org
460 B
Image /tap.php
pixel.rubiconproject.com
371 B
Image /collect
www.google-analytics.com
197 B
Image /collect
www.google-analytics.com
93 B
Image /cs
tags.rd.linksynergy.com
613 B
Image /ads/user-lists/927621030/
www.google.com
281 B
Image /ads/user-lists/927621030/
www.google.co.jp
281 B
Other /track/cmf/google
match.adsrvr.org
613 B
XHR /eventing/infoBatch.v2
www.coursera.org
569 B
Other /cms/v1
ads.yahoo.com
1.7 KB
Other /rum
dsum-sec.casalemedia.com
673 B
Image /redir/
rtb-csync.smartadserver.com
609 B
Other /458359.gif
idsync.rlcdn.com
752 B
Image /tap.php
pixel.rubiconproject.com
371 B
Image /cs
tags.rd.linksynergy.com
613 B
Image /rum
dsum-sec.casalemedia.com
1.0 KB
Other /ups/55982/sync
pixel.advertising.com
291 B
Other /w/1.0/sd
eu-u.openx.net
359 B
Other /pixel
cm.g.doubleclick.net
170 B
Other /seg
secure.adnxs.com
1.0 KB
Image /rtb/um
mapping.nxtck.com
710 B
Image /w/1.0/sd
eu-u.openx.net
255 B
Image /tap.php
pixel.rubiconproject.com
371 B
Image /AdServer/Pug
image2.pubmatic.com
855 B
Other /match
ad.360yield.com
611 B
Image /setuid
secure.adnxs.com
589 B
Image /ups/55953/sync
pixel.advertising.com
299 B
Image /ups/55953/sync
pixel.advertising.com
298 B
Image /ups/55982/sync
pixel.advertising.com
298 B
Other /cms/v1
ads.yahoo.com
1.7 KB
Other /
x.skimresources.com
605 B
Image /ul_cb/match
ad.360yield.com
761 B
Other /site/5386
tags.bluekai.com
499 B
Image /tr/
www.facebook.com
144 B
Image /track/cmf/rightmedia
match.adsrvr.org
583 B
Image /track/cmf/generic
match.adsrvr.org
584 B
Image /
p.skimresources.com
247 B
Image /track/cmf/rightmedia
match.adsrvr.org
583 B
Other /rtb/um
mapping.nxtck.com
84 B
Image /pixel
ads.yahoo.com
1.3 KB
Other /ads/ga-audiences
www.google.com
336 B
Other /ads/ga-audiences
www.google.com
183 B
Image /ads/ga-audiences
www.google.co.jp
241 B
Image /ads/ga-audiences
www.google.co.jp
109 B
Total requests: 111 2.1 MB Load end time: 8.13s
DateLoad speedRequestsPage size
July 20, 2018, 2:32 p.m. (current result)8.13s1112.1 MB
April 19, 2018, 3:06 p.m.8.08s1472.3 MB

  Domain Health Check Results

DNS
4 Errors
0 Warnings
1 Passed
Web Server
0 Errors
0 Warnings
7 Passed
Mail Server
13 Errors
0 Warnings
1 Passed
Blacklist/Malware
0 Errors
0 Warnings
2 Passed

DNS

Type Test Result
DNS Get DNS Records Click "More Info" to review your DNS records.
SOA  
  Primary Nameserver: ns-1590.awsdns-06.co.uk.
  Responsible Person: awsdns-hostmaster.amazon.com.
  Refresh Every: 7200 secs
  Minimum TTL: 86400 secs

A    52.85.138.100
A    52.85.138.121
A    52.85.138.187
A    52.85.138.95
MX   20 alt1.aspmx.l.google.com.
MX   20 alt2.aspmx.l.google.com.
MX   10 aspmx.l.google.com.
MX   30 aspmx2.googlemail.com.
MX   30 aspmx3.googlemail.com.
MX   30 aspmx4.googlemail.com.
MX   30 aspmx5.googlemail.com.
NS   ns-1481.awsdns-57.org.
NS   ns-1590.awsdns-06.co.uk.
NS   ns-258.awsdns-32.com.
NS   ns-688.awsdns-22.net.
WHOIS Get WHOIS Records Click "More Info" to review your WHOIS records.
Nameservers: ns-1481.awsdns-57.org,ns-1590.awsdns-06.co.uk,ns-258.awsdns-32.com,ns-688.awsdns-22.net
Expires: 2023-01-12
Registrar: godaddy.com, llc
Nameserver DNS on ns-1481.awsdns-57.org DNS record mismatch.
DNS CRITICAL - expected '10 aspmx.l.google.com.,20 alt1.aspmx.l.google.com.,20 alt2.aspmx.l.google.com.,30 aspmx2.googlemail.com.,30 aspmx3.googlemail.com.,30 aspmx4.googlemail.com.,30 aspmx5.googlemail.com.,52.85.138.100,52.85.138.121,52.85.138.187,52.85.138.95,ns-1481.awsdns-57.org.,ns-1590.awsdns-06.co.uk,ns-1590.awsdns-06.co.uk.,ns-258.awsdns-32.com.,ns-688.awsdns-22.net.' but got '"376174617-10056694","MS=ms91657421","atlassian-domain-verification=pwnyCbGEmC6E08lYJGO/SYkQvbjFS+OXy03eVMG75U52Edj0vbZGBjdaorxh+PUE","google-site-verification=61uiBFuqY-MYJHWt_8qbU00Rsn7Nq_njU5eMUG0NlrY","google-site-verification=874wxzrE4FAJO81XTCXyH6WYnWZAMdlbMRXI3lfI0bw","google-site-verification=l-IugqqOHDGlHpUHfv3e6z8J1koLgfGSem04lqBA_B8","google-site-verification=tbpsWy5oBEvo-Kod36Lqsb3qRK0h_divcCGAeUdVZlk","spf2.0/pra include:amazonses.com include:sendgrid.net include:_spf.google.com include:spf.mtasv.net -all","v=spf1 include:sendgrid.net ip4:24.6.102.21 ip4:54.83.204.127 ip4:50.16.53.44 include:_spf.google.com include:amazonses.com include:spf.mtasv.net -all",10 aspmx.l.google.com.,20 alt1.aspmx.l.google.com.,20 alt2.aspmx.l.google.com.,30 aspmx2.googlemail.com.,30 aspmx3.googlemail.com.,30 aspmx4.googlemail.com.,30 aspmx5.googlemail.com.,52.85.117.100,52.85.117.211,52.85.117.22,52.85.117.33,ns-1481.awsdns-57.org.,ns-1590.awsdns-06.co.uk,ns-1590.awsdns-06.co.uk.,ns-258.awsdns-32.com.,ns-688.awsdns-22.net.'
Nameserver DNS on ns-1590.awsdns-06.co.uk DNS record mismatch.
DNS CRITICAL - expected '10 aspmx.l.google.com.,20 alt1.aspmx.l.google.com.,20 alt2.aspmx.l.google.com.,30 aspmx2.googlemail.com.,30 aspmx3.googlemail.com.,30 aspmx4.googlemail.com.,30 aspmx5.googlemail.com.,52.85.138.100,52.85.138.121,52.85.138.187,52.85.138.95,ns-1481.awsdns-57.org.,ns-1590.awsdns-06.co.uk,ns-1590.awsdns-06.co.uk.,ns-258.awsdns-32.com.,ns-688.awsdns-22.net.' but got '"376174617-10056694","MS=ms91657421","atlassian-domain-verification=pwnyCbGEmC6E08lYJGO/SYkQvbjFS+OXy03eVMG75U52Edj0vbZGBjdaorxh+PUE","google-site-verification=61uiBFuqY-MYJHWt_8qbU00Rsn7Nq_njU5eMUG0NlrY","google-site-verification=874wxzrE4FAJO81XTCXyH6WYnWZAMdlbMRXI3lfI0bw","google-site-verification=l-IugqqOHDGlHpUHfv3e6z8J1koLgfGSem04lqBA_B8","google-site-verification=tbpsWy5oBEvo-Kod36Lqsb3qRK0h_divcCGAeUdVZlk","spf2.0/pra include:amazonses.com include:sendgrid.net include:_spf.google.com include:spf.mtasv.net -all","v=spf1 include:sendgrid.net ip4:24.6.102.21 ip4:54.83.204.127 ip4:50.16.53.44 include:_spf.google.com include:amazonses.com include:spf.mtasv.net -all",10 aspmx.l.google.com.,20 alt1.aspmx.l.google.com.,20 alt2.aspmx.l.google.com.,30 aspmx2.googlemail.com.,30 aspmx3.googlemail.com.,30 aspmx4.googlemail.com.,30 aspmx5.googlemail.com.,52.85.117.100,52.85.117.211,52.85.117.22,52.85.117.33,ns-1481.awsdns-57.org.,ns-1590.awsdns-06.co.uk,ns-1590.awsdns-06.co.uk.,ns-258.awsdns-32.com.,ns-688.awsdns-22.net.'
Nameserver DNS on ns-258.awsdns-32.com DNS record mismatch.
DNS CRITICAL - expected '10 aspmx.l.google.com.,20 alt1.aspmx.l.google.com.,20 alt2.aspmx.l.google.com.,30 aspmx2.googlemail.com.,30 aspmx3.googlemail.com.,30 aspmx4.googlemail.com.,30 aspmx5.googlemail.com.,52.85.138.100,52.85.138.121,52.85.138.187,52.85.138.95,ns-1481.awsdns-57.org.,ns-1590.awsdns-06.co.uk,ns-1590.awsdns-06.co.uk.,ns-258.awsdns-32.com.,ns-688.awsdns-22.net.' but got '"376174617-10056694","MS=ms91657421","atlassian-domain-verification=pwnyCbGEmC6E08lYJGO/SYkQvbjFS+OXy03eVMG75U52Edj0vbZGBjdaorxh+PUE","google-site-verification=61uiBFuqY-MYJHWt_8qbU00Rsn7Nq_njU5eMUG0NlrY","google-site-verification=874wxzrE4FAJO81XTCXyH6WYnWZAMdlbMRXI3lfI0bw","google-site-verification=l-IugqqOHDGlHpUHfv3e6z8J1koLgfGSem04lqBA_B8","google-site-verification=tbpsWy5oBEvo-Kod36Lqsb3qRK0h_divcCGAeUdVZlk","spf2.0/pra include:amazonses.com include:sendgrid.net include:_spf.google.com include:spf.mtasv.net -all","v=spf1 include:sendgrid.net ip4:24.6.102.21 ip4:54.83.204.127 ip4:50.16.53.44 include:_spf.google.com include:amazonses.com include:spf.mtasv.net -all",10 aspmx.l.google.com.,20 alt1.aspmx.l.google.com.,20 alt2.aspmx.l.google.com.,30 aspmx2.googlemail.com.,30 aspmx3.googlemail.com.,30 aspmx4.googlemail.com.,30 aspmx5.googlemail.com.,52.85.117.100,52.85.117.211,52.85.117.22,52.85.117.33,ns-1481.awsdns-57.org.,ns-1590.awsdns-06.co.uk,ns-1590.awsdns-06.co.uk.,ns-258.awsdns-32.com.,ns-688.awsdns-22.net.'
Nameserver DNS on ns-688.awsdns-22.net DNS record mismatch.
DNS CRITICAL - expected '10 aspmx.l.google.com.,20 alt1.aspmx.l.google.com.,20 alt2.aspmx.l.google.com.,30 aspmx2.googlemail.com.,30 aspmx3.googlemail.com.,30 aspmx4.googlemail.com.,30 aspmx5.googlemail.com.,52.85.138.100,52.85.138.121,52.85.138.187,52.85.138.95,ns-1481.awsdns-57.org.,ns-1590.awsdns-06.co.uk,ns-1590.awsdns-06.co.uk.,ns-258.awsdns-32.com.,ns-688.awsdns-22.net.' but got '"376174617-10056694","MS=ms91657421","atlassian-domain-verification=pwnyCbGEmC6E08lYJGO/SYkQvbjFS+OXy03eVMG75U52Edj0vbZGBjdaorxh+PUE","google-site-verification=61uiBFuqY-MYJHWt_8qbU00Rsn7Nq_njU5eMUG0NlrY","google-site-verification=874wxzrE4FAJO81XTCXyH6WYnWZAMdlbMRXI3lfI0bw","google-site-verification=l-IugqqOHDGlHpUHfv3e6z8J1koLgfGSem04lqBA_B8","google-site-verification=tbpsWy5oBEvo-Kod36Lqsb3qRK0h_divcCGAeUdVZlk","spf2.0/pra include:amazonses.com include:sendgrid.net include:_spf.google.com include:spf.mtasv.net -all","v=spf1 include:sendgrid.net ip4:24.6.102.21 ip4:54.83.204.127 ip4:50.16.53.44 include:_spf.google.com include:amazonses.com include:spf.mtasv.net -all",10 aspmx.l.google.com.,20 alt1.aspmx.l.google.com.,20 alt2.aspmx.l.google.com.,30 aspmx2.googlemail.com.,30 aspmx3.googlemail.com.,30 aspmx4.googlemail.com.,30 aspmx5.googlemail.com.,52.85.117.100,52.85.117.211,52.85.117.22,52.85.117.33,ns-1481.awsdns-57.org.,ns-1590.awsdns-06.co.uk,ns-1590.awsdns-06.co.uk.,ns-258.awsdns-32.com.,ns-688.awsdns-22.net.'
WHOIS Domain Expiry WHOIS OK - 1559 days left for domain, expires '2023-01-12'.
WHOIS OK - 1559 days left for domain, expires '2023-01-12'.
Back to Top

Web Server

Type Test Result
HTTP Web Server HTTP HTTP OK: HTTP/1.1 301 Moved Permanently - 549 bytes in 0.079 second response time
HTTP OK: HTTP/1.1 301 Moved Permanently - 549 bytes in 0.079 second response time
HTTPS Web Server HTTPS HTTP OK: HTTP/1.1 301 Moved Permanently - 919 bytes in 0.264 second response time
HTTP OK: HTTP/1.1 301 Moved Permanently - 919 bytes in 0.264 second response time
SSL Certificate SSL Certificate Expiry SSL_CERT OK - x509 certificate 'coursera.org' from 'Amazon' valid until Oct 21 12:00:00 2019 GMT (expires in 380 days)
SSL_CERT OK - x509 certificate 'coursera.org' from 'Amazon' valid until Oct 21 12:00:00 2019 GMT (expires in 380 days)
Ping (ICMP) Ping (ICMP) - 52.85.138.100 PING OK - Packet loss = 0%, RTA = 21.56 ms
PING OK - Packet loss = 0%, RTA = 21.56 ms
Ping (ICMP) Ping (ICMP) - 52.85.138.121 PING OK - Packet loss = 0%, RTA = 21.62 ms
PING OK - Packet loss = 0%, RTA = 21.62 ms
Ping (ICMP) Ping (ICMP) - 52.85.138.95 PING OK - Packet loss = 0%, RTA = 21.55 ms
PING OK - Packet loss = 0%, RTA = 21.55 ms
Ping (ICMP) Ping (ICMP) - 52.85.138.187 PING OK - Packet loss = 0%, RTA = 21.52 ms
PING OK - Packet loss = 0%, RTA = 21.52 ms
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Mail Server

Type Test Result
SMTP SMTP on alt1.aspmx.l.google.com SMTP OK - 0.096 sec. response time
SMTP OK - 0.096 sec. response time
SMTP SMTP on aspmx.l.google.com CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on alt1.aspmx.l.google.com - SSL/TLS CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on alt2.aspmx.l.google.com - SSL/TLS CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx.l.google.com - SSL/TLS CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on alt2.aspmx.l.google.com CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx2.googlemail.com CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx2.googlemail.com - SSL/TLS CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx3.googlemail.com CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx3.googlemail.com - SSL/TLS CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx5.googlemail.com - SSL/TLS CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx4.googlemail.com - SSL/TLS CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx5.googlemail.com CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
SMTP SMTP on aspmx4.googlemail.com CRITICAL - Socket timeout after 10 seconds
CRITICAL - Socket timeout after 10 seconds
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Blacklist/Malware

Type Test Result
Virus & Malware Virus & Malware MALWARE OK
MALWARE OK
Blacklist Spam Blacklists OK: 205.251.207.69 not on known spam blacklists (91 blacklists checked.)
OK: 205.251.207.69 not on known spam blacklists
 (91 blacklists checked.)
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not loading properly 8 hours ago
coursera login works but when clicked on video - it doesn't load ; just little blue circle revolving. I tried with firefox, chrome and IE - same results 2 days, 3 hours ago