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

arcor.de

https://arcor.de· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

arcor.de

Mobile

Sponsored

Hosting Provider

Incapsula Inc

IP Address

45.60.74.50

Server Location

🇺🇸 Miami, United States

ASN

AS19551

Organization

Incapsula Inc

CDN

Nameservers

ns3.arcor-ip.de.ns1.arcor-ip.de.ns2.arcor-ip.de.

Performance

Page Speed

936 KB

250 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

JAMstack

⚙️ SSR

Decoupled

Frontend

Framework

Nuxt.js

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Incapsula Inc

CDN

Progressive Web App

PWA ReadyWeb ManifestService WorkerApple Touch IconTheme Color

Detected API Sources

https://img.live.vodafone.de/a...

Technology Stack

12 Technologies Detected

Meta Frameworks

Nuxt.js Remix Astro

Analytics

Google Analytics

Facebook Pixel Matomo

Frameworks

Advertising

CSS Frameworks

Tag Managers

SEO Analysis

B74/100

arcor.dearcor.de

Vodafone live | Nachrichten, E-Mail, Games, Musik und mehr

Genieße die Unterhaltungswelt von Vodafone live

Title Length58 chars

Recommended: 50-60 chars

Description Length47 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (147/147)

3 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

5 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

86%Very Good

Interactive

HTTPS

WAF

33d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

21.03.2025

Valid Until

20.03.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

live.vodafone.de

SHA-256 Fingerprint

C4:EE:84:D7:6A:FA:1A:F1:53:98:B5:8F:72:B7:8F:44:D6:06:3A:28...

Upgrade to view header details

HTTP Headers

Developer Console

cache-control

🟡 300s(max-age=300)

content-encoding

📦 Gzip(gzip)

content-security-policy

object-src 'none'; style-src 'unsafe-inline' 'self' *; font-...

content-type

text/html;charset=utf-8

date

Sun, 15 Feb 2026 06:04:13 GMT

expires

Sun, 15 Feb 2026 06:09:13 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

mx3.vodafonemail.de

mx5.vodafonemail.de

Domain Information

arcor.de

Last Updated

17.06.2025

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Legitimate interest basis mentioned

Typography & Readability

VodafoneRg

83/100

Readability

/30

40/40

24px · LH 1.50

Hierarchy

/20

20/25

1.51x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

VodafoneRg

Sans36px

Body Font

VodafoneRg

Sans24px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

36px

27px

47px

24px

Major Third

Scale

✅ Excellent readability: 24px 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.

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

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

9 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)cdn.privacy-mgmt.com(1)

Website Identity

arcor.de

Sponsored

Last analyzed: 15 Feb 2026 at 06:04

Historical Analysis & Change Tracking