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codecademy.com

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

Security headers: F 17/100 (rank #399 of 461) · TLS: TLSv1.3 · Cert expires in 84 days (rank #267 of 459 soonest) · Response: 341.5 ms (rank #306 of 446)
Certificate valid for 84 more days (until Jan 24 14:11:26 2027 GMT).

TLS certificate

FieldValue
IssuerLet's Encrypt
Subject CNcodecademy.com
Valid untilJan 24 14:11:26 2027 GMT
Days left84
TLS versionTLSv1.3
SAN entries5

Security headers (17/100, grade F)

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

Availability & performance

FieldValue
Availability100% (3/3 probes)
Avg response341.5 ms
Fastest / slowest281.3 / 390.1 ms
HTTP status200 (https)
Servercloudflare

DNS & robots.txt

FieldValue
A records104.17.183.120, 104.17.184.120
Nameserversarnold.ns.cloudflare.com, serena.ns.cloudflare.com
MX records1
robots.txtpresent (1 sitemap refs, 6 disallow rules)

How codecademy.com 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.