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edx.org

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

Security headers: B 83/100 (rank #111 of 461) · TLS: TLSv1.3 · Cert expires in 173 days (rank #426 of 459 soonest) · Response: 122.2 ms (rank #161 of 446)
Certificate valid for 173 more days (until Apr 23 23:59:59 2027 GMT).

TLS certificate

FieldValue
IssuerAmazon
Subject CNedx.org
Valid untilApr 23 23:59:59 2027 GMT
Days left173
TLS versionTLSv1.3
SAN entries1

Security headers (83/100, grade B)

HeaderStatus
strict-transport-securitymax-age=31536000
content-security-policyframe-ancestors 'none'
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
referrer-policystrict-origin-when-cross-origin
permissions-policymissing

Availability & performance

FieldValue
Availability100% (3/3 probes)
Avg response122.2 ms
Fastest / slowest98.2 / 143.9 ms
HTTP status200 (https)
Servercloudflare

DNS & robots.txt

FieldValue
A records13.32.230.109, 13.32.230.41, 13.32.230.58, 13.32.230.79
Nameserversns-1472.awsdns-56.org, ns-1753.awsdns-27.co.uk, ns-73.awsdns-09.com, ns-828.awsdns-39.net
MX records5
robots.txtpresent (1 sitemap refs, 23 disallow rules)

How edx.org compares

SiteHeadersScoreCert days leftms
stanford.eduA1005162.5
ox.ac.ukA10064567.1
cam.ac.ukA10053103.1
berkeley.eduB836935.5
udemy.comB837124.7
udacity.comB8393147.3
w3schools.comB831191050.3
freecodecamp.orgB8372430.0

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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.