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udacity.com

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

Security headers: B 83/100 (rank #113 of 461) · TLS: TLSv1.3 · Cert expires in 93 days (rank #309 of 459 soonest) · Response: 147.3 ms (rank #184 of 446)
Certificate valid for 93 more days (until Feb 2 23:59:59 2027 GMT).

TLS certificate

FieldValue
IssuerAmazon
Subject CN*.udacity.com
Valid untilFeb 2 23:59:59 2027 GMT
Days left93
TLS versionTLSv1.3
SAN entries2

Security headers (83/100, grade B)

HeaderStatus
strict-transport-securitymax-age=31536000; includeSubDomains
content-security-policyframe-ancestors 'self' *.udacity.com;
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
referrer-policystrict-origin-when-cross-origin
permissions-policymissing

Availability & performance

FieldValue
Availability100% (3/3 probes)
Avg response147.3 ms
Fastest / slowest93.2 / 237.0 ms
HTTP status200 (https)
Servercloudflare

DNS & robots.txt

FieldValue
A records52.84.20.87, 52.84.20.49, 52.84.20.105, 52.84.20.45
Nameserversns-1014.awsdns-62.net, ns-1109.awsdns-10.org, ns-13.awsdns-01.com, ns-1549.awsdns-01.co.uk
MX records2
robots.txtpresent (2 sitemap refs, 34 disallow rules)

How udacity.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
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.