dcs.vn

https://dcs.vn· First analyzed 03 May 2026· Updated 03 May 2026

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dcs.vn

Mobile

Sponsored

Hosting Provider

VIETTEL

IP Address

116.103.204.245

Site Location

🇻🇳 Vietnamvia tld

Server Location

🇻🇳 Hanoi, Vietnam

ASN

AS7552

Organization

VIETTEL

Server

Cloudrity

Nameservers

dns2.cpt.gov.vn.dns1.cpt.gov.vn.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

291 ms10%

Speed Index

378 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

15 KB

40 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

VIETTEL

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Icon Libraries

Customer Support

SEO Analysis

D47/100

Meta Tags5/15

Content5/12

Headings1/8

Technical16/25

E-E-A-T3/7

Images1/7

Links2/5

URL5/5

Social3/5

Freshness0/4

Mobile3/4

Indexability3/3

dcs.vndcs.vn

CỔNG CÁC ỨNG DỤNG

Title Length17 chars

Recommended: 50-60 chars (~113px / 580px)

Description Length17 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (15/17) — critical for accessibility and SEO

12 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

9 rules

Local SEO

Local Search Readiness

3/100

Poor

1 14 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

Sponsored

AI & LLM Readiness

F39/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

12/25

AI Bot Access

14/14 accessible

AI Search

OAI-SearchBot

PerplexityBot

Claude-SearchBot

Gemini-Deep-Research

DuckAssistBot

Training

GPTBot

ClaudeBot

Google-Extended

Meta-ExternalAgent

Bytespiderinfo

Amazonbot

Applebot-Extended

CCBotinfo

Fetch

ChatGPT-User

Machine Readability

llms.txtinvalid

llms-full.txt

Semantic HTML

Heading Hierarchy

nav

Text ratio:3%

Words:272

Token eff.:Too Short

Sections/1K:3.7

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary10w

Descriptive Headingsavg 4w

Canonical URL

Open Graph3/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (11)

AI readiness recommendation preview...

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.

66/100

Passed

Critical

Warnings

Images & Alt Text

20/20

Checks if images have descriptive alt text for screen readers and visually impaired users.

Semantic Structure

9/20

Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.

Forms & Inputs

7/15

Verifies form fields have labels, error messages are clear, and inputs are properly associated.

Color & Contrast

15/15

Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.

Keyboard & Focus

11/15

Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).

ARIA & Roles

4/15

Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

4 recommendations

•Accessibility recommendation preview...

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Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.

54/100

A+

2 mg

CO₂e / view

14.7 KB

Page Weight

95%

Cleaner Than

New Visitor

2 mg

Returning (cached)

1 mg

Annual (10K/mo)

216 g

Emission Segments

Data Center

<0.001 g

Network

<0.001 g

Device

1 mg

Resource Breakdown

HTML

14.7 KB

Green Hosting Not Verified

VIETTEL

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

46%Poor

Interactive

HTTPS

No WAF

226d

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

HTTP Protocol

HTTP/2

Valid From

13.11.2025

Valid Until

15.12.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.dcs.vndcs.vn

SHA-256 Fingerprint

E8:98:F5:6A:CA:C9:6F:31:56:37:00:CF:57:BD:40:FC:0E:88:27:C6...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

access-control-allow-credentials

true

access-control-allow-headers

Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modif...

access-control-allow-methods

GET, POST, HEAD

access-control-allow-origin

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

103.221.228.29

Domain Information

dcs.vn

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.

60/100

Mobile Friendly8 breakpoints

Viewport Meta

The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.

Responsive Design

Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.

Touch Icons

Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.

Readable Font Size

Base font size should be at least 16px on mobile to ensure text is readable without zooming.

Relative Units

Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.

No H-Scroll Risk

No elements wider than the viewport that would cause horizontal scrolling on mobile devices.

Tap Targets OK

Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.

No Fixed Widths

No elements with fixed pixel widths that could overflow on smaller screens and break the layout.

Viewport

width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no

3 recommendations

•Mobile compatibility recommendation preview...

Upgrade to view recommendations

Typography & Readability

Inter-Regular + Inter-Medium

WCAG Partial

66/100

Readability

/30

24/30

16px · LH 1.50

Hierarchy

/20

6/20

WCAG

/25

18/25

1.85:1 min contrast

Performance

/25

18/25

2 fonts · 3 req

Heading Font

Inter-Regular

Sans

Body Font

Inter-Medium

Sans16px

Contrast Ratio

1.85:1

2 issues

Reading Comfort

Dual Sans-Serif

left aligned

15px

16px

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

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Partial contrast: 2 elements below WCAG AA threshold (min 1.9:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

✅ Lean font stack: 2 font families keeps load times fast.

✅ Smart font loading: font-display: swap prevents invisible text during load (FOIT).

Buy on MyFonts

Color Palette

9 unique colors

3.26:1 AA Large Light

#ffffff

Background· 75%

#8f8e8f

Other· 2.6%

#b9000e

Primary· 8.7%

#f0eae8

Secondary· 4%

#d1bdbd

Secondary· 3.7%

#da8487

Accent· 2.4%

#e52432

Accent· 2%

#d20119

Accent· 0.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

7 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)local(1)

Website Identity

dcs.vn

Location detected: 🇻🇳 Vietnamvia tld

Sponsored

Last analyzed: 03 May 2026 at 01:58

Historical Analysis & Change Tracking