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

nrao.edu

https://nrao.edu· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

nrao.edu

Sponsored

Hosting Provider

National Radio Astronomy Observatory

IP Address

192.33.115.129

Server Location

🇺🇸 Charlottesville, United States

ASN

AS225

Organization

National Radio Astronomy Observatory

Server

Apache

Nameservers

zia.aoc.nrao.edu.sadira.gb.nrao.edu.cv3.cv.nrao.edu.

Performance

Page Speed

4.8 MB

100 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPressv6.9.1

cms

nraoCustom

Technology Stack

21 Technologies Detected

Plugins

Contact Form 7

WooCommerce

Wp User Avatar The Events Calendar Simple Share Buttons Adder

Mailchimp For Woocommerce

Libraries

Analytics

Meta Frameworks

UI Components

CSS Frameworks

Fonts

Tag Managers

Email Marketing

Social

Web Servers

Languages

Security

SEO Analysis

C64/100

nrao.edunrao.edu

National Radio Astronomy Observatory – Revealing the Hidden Universe

No description available for this page.

Title Length68 chars

Recommended: 50-60 chars

Description Length0 chars

Recommended: 120-160 chars

Issues (2)

• Missing meta description - important for click-through rates
• Missing H1 tag - every page should have one H1

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2,176 URLs

robots.txt

14 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

80d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

09.04.2025

Valid Until

10.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.nrao.edunrao.edu

SHA-256 Fingerprint

05:47:EF:7F:54:60:EE:F7:33:F5:7C:2B:DA:AF:32:F5:A3:E2:4C:85...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 3s(max-age=3, must-revalidate)

content-type

text/html; charset=UTF-8

date

Thu, 19 Feb 2026 11:48:02 GMT

server

Apache/2.4.37 (Red Hat Enterprise Linux) OpenSSL/1.1.1k

vary

Accept-Encoding,Cookie

x-powered-by

PHP/8.2.30

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (3)

cv3.cv.nrao.edu

revere-vml.aoc.nrao.edu

io.gb.nrao.edu

Domain Information

nrao.edu

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Data Protection Officer mentioned

Typography & Readability

Source Sans Pro

63/100

Readability

/30

32/40

16px · LH 1.30

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Source Sans Pro

Sans

Body Font

Source Sans Pro

Sans16px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

28px

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 16 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

GGoogle Fonts Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

Marketing Automation

MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Social Media

Twitter/X WidgetsFree

ShareThisFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

public.nrao.edu(10)googletagmanager.com(2)gstatic.com(1)chimpstatic.com(1)acdn.adnxs.com(1)

Website Identity

Facebook X (Twitter)Instagram

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Last analyzed: 19 Feb 2026 at 11:48

Historical Analysis & Change Tracking