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biz-cen.ru

https://biz-cen.ru· First analyzed 04 Jun 2026· Updated 04 Jun 2026
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biz-cen.ru
Desktop screenshot of biz-cen.ru
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Mobile

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Hosting Provider

Selectel

IP Address

84.38.187.222

Site Location

🇷🇺 Russiavia phone

Server Location

🇷🇺 St Petersburg, Russia

ASN

AS49505

Organization

Selectel

Server

Apache

Nameservers

dns.fastdns24.com.dns2.fastdns24.org.dns3.fastdns24.eu.dns4.fastdns24.link.

Performance

96

Core Web Vitals

Weight

First Contentful Paint
1.0 s10%
Speed Index
1.4 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
2.3 MB
154 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Selectel

Technology Stack

12 Technologies Detected

Analytics

4
Google Analytics
Google Analytics 4
Facebook PixelSegment

Libraries

2
jQueryv1.9.1
jQuery UI

Other

1
Modernizr

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Advertising

1
Google Ads

Web Servers

1
Apachev2.4.25

Customer Support

1
Zendesk

SEO Analysis

D50/100
13
10
3
Meta Tags9/15
Content6/12
Headings8/8
Technical12/25
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile1/4
Indexability3/3
B
biz-cen.rubiz-cen.ru

Аренда офисов и офисных помещений в бизнес центрах Санкт-Петербурга...

Арендовать, снять офисную недвижимость без посредников и комиссий. Аренда офиса в Москве по лучшим ценам. Коммерческая недвижимость во всех БЦ.

Title truncated.
Title Length123 chars

Recommended: 50-60 chars (~756px / 580px)

Description Length143 chars

Recommended: 120-160 chars

Issues (3)

  • • Title is too long (123 chars, ~756px). Will be truncated in search results.
  • • Most images missing alt text (70/90) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

2,731 URLs

robots.txt

453 rules

Sitemap reference found

Local SEO

Local Search Readiness

19/100
Poor
5 11 1

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

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AI & LLM Readiness

F32/100
Bot Access
20/25
Machine Read.
7/25
Schema Data
1/25
Citation
4/25

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:2%
Words:2,442
Token eff.:Optimal

Structured Data

Microdata
Organization×1.1(min)microdata

Citation Readiness

Opening Summary423w
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
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.
D
52/100
6
Passed
4
Critical
2
Warnings
Images & Alt Text
20/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
5/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
2/15
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.
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.
15/100
E
296 mg
CO₂e / view
2.3 MB
Page Weight
30%
Cleaner Than
New Visitor
338 mg
vs
Returning (cached)
169 mg
Annual (10K/mo)
35.5 kg
Emission Segments
Data Center
66 mg
Network
71 mg
Device
159 mg
Resource Breakdown
JavaScript
1.4 MB
Images
837.2 KB
CSS
8.4 KB
HTML
80.1 KB
Other
12.4 KB
Green Hosting Not Verified
Selectel
8 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

69d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

14.05.2026

Valid Until

12.08.2026

Subject Alternative Names (10)

assets1.biz-cen.ruassets2.biz-cen.rubiz-cen.ruimg.biz-cen.rum.biz-cen.rumsk.biz-cen.ruoffice-rent-msk.biz-cen.ruoffice-rent.biz-cen.ru+2 more

SHA-256 Fingerprint

E1:ED:99:74:F0:FF:AD:CE:10:3F:8D:A0:71:25:DC:78:74:88:DE:8B...

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...)
connection
Keep-Alive
content-encoding
📦 Gzip(gzip)
content-type
text/html; charset=UTF-8
date
Thu, 04 Jun 2026 11:27:48 GMT
expires
Thu, 19 Nov 1981 08:52:00 GMT
Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

70

SPF
DKIM
DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

mail.biz-cen.ru

Domain Information

biz-cen.ru

Domain Age
15y 10m

Created

29.07.2010

Expires

29.07.2026

Registrar

NETHOUSE-RU

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Data Protection Officer mentioned

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.
D
45/100
Not Mobile Friendly2 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.
3 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Helvetica

WCAG Partial
63/100
Readability
/30
19/30

13px · LH 1.38

Hierarchy
/20
17/20

1.85x ratio · ✓ H1→H6

WCAG
/25
14/25

1:1 min contrast

Performance
/25
13/25

1 font · 1 req

Heading Font

Helvetica

Sans24px

Body Font

Helvetica

Sans13px

Contrast Ratio

1:1

6 issues

Reading Comfort

~74 CPL

Optimal (45–75)
24px
h1
24px
h2
13px
p
Minor Second
Scale

❌ Critical: 13px body text is too small. Minimum 14px, recommend 16px+.

⚠️ Tight line spacing (1.38). Increase to 1.4–1.6 for better readability.

✅ Optimal line length: ~74 chars/line (ideal 45–75 CPL).

✅ Easy to read: Flesch score 100/100 — accessible to general audiences.

⚠️ Partial contrast: 6 elements below WCAG AA threshold (min 1.0:1).

✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

Buy on MyFontsFlesch 100

Color Palette

8 unique colors
12.59:1 AAA Light
#ffffff
Background· 30.499999999999996%
#323339
Other· 11%
#d7cbc6
Primary· 7.4%
#b37388
Secondary· 6.2%

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

3
Google Tag ManagerFree
Google AnalyticsFree
KissmetricsMid-Market

User behavior and product analytics

Advertising

1
Facebook PixelMid-Market

Ad platforms and retargeting pixels

2

Categories

4

Total Tools

0

Enterprise

2

Mid-Market

Assessment: Well-developed marketing technology stack

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Scripts & Styles

26 Resources

20
Scripts
6
Styles
12
Async
0
Defer

Top Script Sources

assets2.biz-cen.ru(6)google-analytics.com(2)connect.facebook.net(2)googletagmanager.com(2)code.jivosite.com(1)

Website Identity

biz-cen.ru

+7 (812) 642-98-46
15 years old
Location detected: 🇷🇺 Russiavia phone
NETHOUSE-RU

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Last analyzed: 04 Jun 2026 at 11:28

Historical Analysis & Change Tracking