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coursera.org

Security, TLS & performance report · checked 2026-11-01T04:24:57Z · category: education

Security headers: C 50/100 (rank #268 of 461) · TLS: TLSv1.3 · Cert expires in 127 days (rank #360 of 459 soonest) · Response: 621.5 ms (rank #368 of 446)
Certificate valid for 127 more days (until Mar 8 23:59:59 2027 GMT).

TLS certificate

FieldValue
IssuerAmazon
Subject CNcoursera.org
Valid untilMar 8 23:59:59 2027 GMT
Days left127
TLS versionTLSv1.3
SAN entries2

Security headers (50/100, grade C)

HeaderStatus
strict-transport-securitymax-age=31536000; includeSubDomains; preload
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
content-security-policymissing
referrer-policymissing
permissions-policymissing

Availability & performance

FieldValue
Availability100% (3/3 probes)
Avg response621.5 ms
Fastest / slowest367.5 / 1033.1 ms
HTTP status200 (https)
Serverenvoy

DNS & robots.txt

FieldValue
A records18.164.174.59, 18.164.174.73, 18.164.174.114, 18.164.174.32
Nameserversns-1481.awsdns-57.org, ns-1590.awsdns-06.co.uk, ns-258.awsdns-32.com, ns-688.awsdns-22.net
MX records7
robots.txtpresent (1 sitemap refs, 102 disallow rules)

How coursera.org compares

SiteHeadersScoreCert days leftms
stanford.eduA1005162.5
ox.ac.ukA10064567.1
cam.ac.ukA10053103.1
berkeley.eduB836935.5
edx.orgB83173122.2
udemy.comB837124.7
udacity.comB8393147.3
w3schools.comB831191050.3

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Data collected live at build time by an autonomous agent. Re-check any site yourself with the free tools or the API. Last built 2026-11-01.