What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

Back to Search

rsna.org

https://rsna.org· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

rsna.org

Mobile

Sponsored

Hosting Provider

Radiological Society of North America

IP Address

192.190.47.159

Server Location

🇺🇸 Oak Brook, United States

ASN

AS23352

Organization

Radiological Society of North America

Server

Microsoft IIS

Nameservers

ns-1593.awsdns-07.co.uk.ns-258.awsdns-32.com.ns-975.awsdns-57.net.ns-1259.awsdns-29.org.

Performance

Page Speed

5.1 MB

78 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Framework

jQuery

Styling

Bootstrap

CMS

Sitecore

Infrastructure

Hosting

Radiological Society of North America

Technology Stack

9 Technologies Detected

Other

GSAPv2.0.1 ScrollMagic

CSS Frameworks

Libraries

Icon Libraries

Analytics

Tag Managers

Web Servers

SEO Analysis

B70/100

rsna.orgrsna.org

Radiological Society of North America | RSNA

The Radiological Society of North America (RSNA) supports your career in radiology. Explore membership benefits and find a variety of high-quality education ...

Description truncated.

Title Length44 chars

Recommended: 50-60 chars

Description Length167 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

3 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

31d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GoDaddy.com, Inc.

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

13.02.2025

Valid Until

17.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.rsna.orgrsna.org

SHA-256 Fingerprint

18:92:C9:A4:EF:EA:42:6A:14:F0:63:2A:1D:99:B1:C4:79:0F:8F:5C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

accept-ch

Sec-CH-UA-Full-Version-List,Sec-CH-UA-Platform-Version,Sec-C...

access-control-allow-origin

cache-control

🟣 Private(private)

content-encoding

📦 Gzip(gzip)

content-length

25112

content-type

text/html; charset=utf-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

rsna-org.mail.protection.outlook.com

Domain Information

rsna.org

Domain Age

31y 10m

Created

15.04.1994

Expires

16.04.2026

Last Updated

17.03.2025

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Usercentrics

Cookie Consent Banner

Usercentrics

GDPR Indicators

Cookie consent banner detected

CMP: Usercentrics

Typography & Readability

Arial + -apple-system

85/100

Readability

/30

40/40

27px · LH 1.50

Hierarchy

/20

20/25

1.76x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Arial

Sans48px

Body Font

-apple-system

Sans27px

Contrast Ratio

Reading Comfort

~42 CPL

Needs attention

48px

32px

60px

18px

27px

✅ Excellent readability: 27px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Good hierarchy: Clear distinction between headlines and body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 38 elements lack adequate spacing.

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

28 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdnjs.cloudflare.com(5)web.cmp.usercentrics.eu(4)local(3)cdn.jsdelivr.net(2)rsna.org(2)

Website Identity

Facebook X (Twitter)Instagram LinkedIn Threads Bluesky

Sponsored

Last analyzed: 14 Feb 2026 at 11:15

Historical Analysis & Change Tracking