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

yellowpages.com

https://yellowpages.com· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

yellowpages.com

Mobile

Sponsored

Hosting Provider

Thryv

IP Address

151.138.15.18

Server Location

🇺🇸 Phoenix, United States

ASN

AS6482

Organization

Thryv

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.thryvinc-ns.com.ns2.thryvinc-ns.com.ns3.thryvinc-ns.com.

Performance

Page Speed

62 KB

45 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Thryv

CDN

Cloudflare

Technology Stack

6 Technologies Detected

Analytics

Libraries

CSS Frameworks

CDN

Frameworks

SEO Analysis

B76/100

yellowpages.comyellowpages.com

The Real Yellow Pages®

The original source to find and connect with local plumbers, handymen, mechanics, attorneys, dentists, and more.

Title Length22 chars

Recommended: 50-60 chars

Description Length112 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

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Security Score

51%Poor

Interactive

HTTPS

WAF

53d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

07.01.2026

Valid Until

07.04.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.yellowpages.com

SHA-256 Fingerprint

23:FB:00:31:F5:CE:E8:3F:39:3C:74:47:D4:2E:67:ED:07:A4:CF:8E...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

date

Fri, 13 Feb 2026 12:57:50 GMT

content-type

text/html; charset=utf-8

content-encoding

📦 Gzip(gzip)

strict-transport-security

max-age=31536000; includeSubDomains; preload

x-powered-by

Express

p3p

CP="This site does not have a p3p policy."

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

yellowpages-com.mail.protection.outlook.com

Domain Information

yellowpages.com

Domain Age

29y 10m

Created

05.04.1996

Expires

01.08.2026

Last Updated

28.07.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

helvetica

66/100

Readability

/30

25/40

16px · LH 1.13

Hierarchy

/20

25/25

3x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

helvetica

Sans48px

Body Font

helvetica

Sans16px

Contrast Ratio

Reading Comfort

~112 CPL

Needs attention

48px

42px

16px

14px

16px

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

⚠️ Tight line spacing (1.12). Consider 1.4-1.6 for better readability.

✅ Strong hierarchy: Headlines are 3.0x larger than body text.

✅ 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.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

14 Resources

Scripts

Styles

Async

Defer

Top Script Sources

i1.ypcdn.com(6)cdn.cookielaw.org(3)googletagmanager.com(1)i2.ypcdn.com(1)

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Last analyzed: 13 Feb 2026 at 12:58

Historical Analysis & Change Tracking