caltech.edu

Last analyzed: Refreshing...

Looks Normal

Standard signals observed

This reflects observed technical signals, not a judgment of the website's intent or safety. Wondering if Caltech is legit? Below you'll find technical signals for caltech.edu including domain age, HTTPS security, DNS records, and redirect behavior to help you decide if this website is trustworthy.

Observed signals
Registration data not publicly available
Valid HTTPS certificate
DNS hosted via Cloudflare (based on nameservers)
2 redirects observed
Favicon detected
AI Summary Plain-language explanation of the signals

The domain caltech.edu hosts an active website with DNS records appearing to be managed via Cloudflare (inferred from nameservers). The site uses HTTPS enforced through two HTTP-to-HTTPS redirects, ensuring secure connections. It presents a valid multi-domain SSL certificate issued by InCommon RSA Server CA 2, expiring on December 10, 2026, which covers this domain. These signals describe technical characteristics only and do not indicate intent or safety.

HTTP Response
HTTPS 2 redirects

Final URL:

https://www.caltech.edu/
Redirect chain
301 http://caltech.edu/ → http://www.caltech.edu/
301 http://www.caltech.edu/ → https://www.caltech.edu/
200 https://www.caltech.edu/
TLS Certificate
Valid
Yes
Covers Domain
Yes
Type
Multi-domain

Expires in 281 days

Certificate details

Subject: /C=US/ST=California/O=California Institute of Technology/CN=caltech.edu

Issuer: /C=US/O=Internet2/CN=InCommon RSA Server CA 2

Chain: 4 certificates

Subject Alt Names (43)
caltech.edu matches
admissions.caltech.edu
alumni.caltech.edu
aphms.caltech.edu
bbe.caltech.edu
biology.caltech.edu
bond.caltech.edu
brinsonhub.caltech.edu

+ 35 more

DNS Records
Cloudflare (inferred)

Based on nameserver patterns, DNS appears to be hosted via Cloudflare, a widely-used DNS and CDN provider.

A Records
1
AAAA
0
NS
2
IP addresses & nameservers

A: 52.26.125.194

NS: ns0090.secondary.cloudflare.com, ns0239.secondary.cloudflare.com

MX records (2)
mx1.caltech.iphmx.com
mx2.caltech.iphmx.com
TXT records (10)
MS=ms43712753
iContact1389932
ZOOM_verify_a-Gb5-aqQgygEiKsnho63w
apple-domain-verification=KD7b3wNXe76BHRAV
1password-site-verification=VRLN67QMNNEPXIIREL6TDZABF4

+ 5 more

Domain Registration

Could not retrieve domain registration information.

Robots.txt (Crawl directives)
Status
200 OK (1 redirect)
Crawl Access
Allowed (with restrictions)

Final URL: https://www.caltech.edu/robots.txt

These directives apply to crawlers requesting this host.

Agents
3
Rules
7
Sitemaps
1
Directive breakdown
Disallow 5
Allow 1
Crawl-delay 10.0s
Sitemaps 1
Sitemap URLs
https://www.caltech.edu/sitemap.xml
Raw content
13 lines View full file 
User-agent: SemrushBot
Disallow: /

User-agent: BLP_bbot
Disallow: /

User-agent: *
Disallow: /campus-life-events/calendar/minicalendar/*
Disallow: /map/landmark_ajax/*
Disallow: /map/milestone/*
Crawl-delay: 10
Allow: *
Sitemap: https://www.caltech.edu/sitemap.xml

Robots.txt directives are advisory instructions for crawlers and do not enforce access control.

Tech Stack
Platform
Not detected
JS Framework
jQuery
Server
Hidden (CDN)
CDN
Cloudflare
Analytics
2
Security Headers
5 / 6
Cloudflare jQuery Google Analytics Google Tag Manager
CSP X-Frame-Options X-Content-Type-Options Referrer-Policy Permissions-Policy
Detection evidence
CSP:
content-security-policy header present
jQuery:
jQuery library referenced in page
Cloudflare:
cf-ray header present (IAD)
Referrer-Policy:
referrer-policy header present
X-Frame-Options:
x-frame-options header present
Google Analytics:
Google Analytics script loaded
Google Tag Manager:
Google Tag Manager container found
Permissions-Policy:
permissions-policy header present
X-Content-Type-Options:
x-content-type-options header present

Technologies detected from HTTP headers and HTML patterns. Detection is passive and may not capture all technologies.

Check Another Domain