oc3.ru

https://oc3.ru· First analyzed 01 May 2026· Updated 01 May 2026

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oc3.ru

Mobile

Sponsored

Hosting Provider

DataLine Ltd.

IP Address

95.131.31.147

Site Location

🇷🇺 Russiavia tld

Server Location

🇷🇺 Moscow, Russia

ASN

AS49063

Organization

DataLine Ltd.

Server

Nginx

Nameservers

dns2.yandex.net.dns1.yandex.net.

Performance

Core Web Vitals

Weight

First Contentful Paint

927 ms10%

Speed Index

1.2 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

700 KB

51 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

DataLine Ltd.

Progressive Web App

Web Manifest

Technology Stack

8 Technologies Detected

UI Components

Slick Carousel Fancybox

CSS Frameworks

Libraries

Icon Libraries

Web Servers

Languages

SEO Analysis

D57/100

Meta Tags9/15

Content8/12

Headings3/8

Technical13/25

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social3/5

Freshness0/4

Mobile4/4

Indexability3/3

oc3.ruoc3.ru

Компания ОС3

Компания ОС3 - российская IT компания (основана в 2007 году) - разработчик программных инструментов, мультимедиа и веб-решений в сфере образования и бизнеса.

Title Length12 chars

Recommended: 50-60 chars (~74px / 580px)

Description Length157 chars

Recommended: 120-160 chars

Issues (3)

• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (10/12) — critical for accessibility and SEO
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

10 issues found

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Crawlability

Sitemap

Type: index

13 URLs

13 sub-sitemaps

robots.txt

36 rules

Sitemap reference found

Local SEO

Local Search Readiness

9/100

Poor

3 13 2

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

Sponsored

AI & LLM Readiness

F36/100

Bot Access

20/25

Machine Read.

2/25

Schema Data

0/25

Citation

14/25

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.txt

llms-full.txt

Semantic HTML

Heading Hierarchy

Text ratio:12%

Words:296

Token eff.:Too Short

Sections/1K:3.4

Structured Data

No Schema

Citation Readiness

Opening Summary26w

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 (10)

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.

52/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

7/20

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

Forms & Inputs

15/15

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

9/15

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

ARIA & Roles

1/15

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

3 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.

42/100

87 mg

CO₂e / view

700.0 KB

Page Weight

80%

Cleaner Than

New Visitor

99 mg

Returning (cached)

50 mg

Annual (10K/mo)

10.4 kg

Emission Segments

Data Center

19 mg

Network

21 mg

Device

47 mg

Resource Breakdown

JavaScript

135.3 KB

Images

214.2 KB

CSS

344.8 KB

HTML

5.7 KB

Green Hosting Not Verified

DataLine Ltd.

4 recommendations

•Carbon footprint recommendation preview...

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Security Score

31%Critical

Interactive

HTTPS

No WAF

143d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

21.08.2025

Valid Until

22.09.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.oc3.ruoc3.ru

SHA-256 Fingerprint

DC:2D:51:9A:97:29:5A:84:38:94:6E:8E:B8:83:B3:B3:4C:DF:BC:FC...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)

content-encoding

📦 Gzip(gzip)

content-length

5577

content-type

text/html; charset=UTF-8

date

Fri, 01 May 2026 18:07:43 GMT

expires

Thu, 19 Nov 1981 08:52:00 GMT

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

e1.oc3.ru

Domain Information

oc3.ru

Domain Age

19y 5m

Created

23.11.2006

Expires

23.11.2026

Registrar

RU-CENTER-RU

DNSSEC

Not Enabled

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.

37/100

Not Mobile Friendly1 breakpoint

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.

4 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

PTSerifBold + PT Sans

WCAG Partial

67/100

Readability

/30

28/30

18px · LH 1.43

Hierarchy

/20

7/20

WCAG

/25

14/25

1:1 min contrast

Performance

/25

18/25

2 fonts · 1 req

Heading Font

PTSerifBold

Serif

Body Font

PT Sans

Sans18px

Contrast Ratio

1:1

12 issues

Reading Comfort

~67 CPL

Optimal (45–75)

48px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Optimal line spacing: 1.43 ratio (ideal range 1.4–1.6).

✅ Optimal line length: ~67 chars/line (ideal 45–75 CPL).

⚠️ Partial contrast: 12 elements below WCAG AA threshold (min 1.0:1).

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

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

Buy on MyFonts

Color Palette

11 unique colors

3.82:1 AA Large Light

#ffffff

Background· 61%

#748686

Other· 5.1%

#0e4160

Accent· 6.5%

#efac64

Primary· 4.7%

#9c9487

Secondary· 3.7%

#536466

Secondary· 3.4%

#e2955e

Accent· 2.9%

#e6cba6

Accent· 0.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(8)bitrix.info(1)smartcaptcha.cloud.yandex.ru(1)auth.oc3.ru(1)mc.yandex.ru(1)

Website Identity

oc3.ru

oc3@oc3.ru

19 years old

Location detected: 🇷🇺 Russiavia tld

RU-CENTER-RUen

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Last analyzed: 01 May 2026 at 18:08

Historical Analysis & Change Tracking