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

ip138.com

https://ip138.com· First analyzed 17 Feb 2026· Updated 17 Feb 2026

Export

ip138.com

Mobile

Sponsored

Hosting Provider

Meteverse Limited

IP Address

138.113.136.83

Server Location

🇺🇦 Kyiv, Ukraine

ASN

AS54994

Server

Microsoft IIS

Performance

Page Speed

1 KB

10 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Meteverse Limited

Technology Stack

3 Technologies Detected

CSS Frameworks

Tailwind CSS

Web Servers

Microsoft IISv6.0

Frameworks

ASP.NET

SEO Analysis

C68/100

ip138.comip138.com

iP地址查询--手机号码查询归属地 | 邮政编码查询 | iP地址归属地查询 | 身份证号码验证在线查询网

公网ip地址归属地查询

Title Length53 chars

Recommended: 50-60 chars

Description Length11 chars

Recommended: 120-160 chars

Issues (0)

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

2 rules

Allows all crawlers

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

88d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

Valid From

15.04.2025

Valid Until

17.05.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.ip138.comip138.com

SHA-256 Fingerprint

88:66:71:57:59:60:76:D9:DD:C6:E3:FD:E6:0B:25:67:BB:3D:DA:5E...

Top Recommendations

Security recommendation preview

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Upgrade to view header details

HTTP Headers

Developer Console

date

Tue, 17 Feb 2026 12:06:03 GMT

content-type

text/html

content-length

19371

connection

keep-alive

content-location

http://ip138.com/index.htm

last-modified

Tue, 03 Feb 2026 13:54:01 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (2)

mxbiz1.qq.com

mxbiz2.qq.com

Domain Information

ip138.com

Domain Age

21y 10m

Created

19.04.2004

Expires

19.04.2027

Last Updated

12.11.2025

Registrar

eName Technology Co., Ltd.

DNSSEC

Not Enabled

Typography & Readability

Arial

53/100

Readability

/30

17/40

14px · LH 2.57

Hierarchy

/20

13/25

1.71x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Arial

Sans24px

Body Font

Arial

Sans14px

Contrast Ratio

Reading Comfort

~98 CPL

Needs attention

24px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

⚠️ Wide line spacing (2.57). Consider 1.4-1.8 for better flow.

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

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

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

⚠️ Wide lines: ~98 chars/line. Consider max-width for better reading flow.

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Scripts & Styles

5 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cache.ip138.com(2)hm.baidu.com(1)

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Last analyzed: 17 Feb 2026 at 12:06

Historical Analysis & Change Tracking