isbn.org.ar

https://isbn.org.ar· First analyzed 29 May 2026· Updated 29 May 2026

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isbn.org.ar

Mobile

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Hosting Provider

Telmex Argentina S.A

IP Address

200.69.146.13

Site Location

🇦🇷 Argentinavia tld

Server Location

🇦🇷 Rawson, Argentina

ASN

AS11664

Organization

Telmex Argentina S.A

Server

lighttpd/1.4.35

Nameservers

ns11.dnsmadeeasy.com.ns15.dnsmadeeasy.com.ns10.dnsmadeeasy.com.ns12.dnsmadeeasy.com.+2 more

Performance

Core Web Vitals

Weight

First Contentful Paint

2.0 s10%

Speed Index

2.6 s10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

923 KB

31 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

Infrastructure

Hosting

Telmex Argentina S.A

Technology Stack

6 Technologies Detected

CSS Frameworks

Analytics

Libraries

Languages

SEO Analysis

D46/100

Meta Tags4/15

Content7/12

Headings3/8

Technical11/21

E-E-A-T3/7

Images1/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile4/4

Indexability3/3

isbn.org.arisbn.org.ar

ISBN AR

No description available for this page.

Title Length7 chars

Recommended: 50-60 chars (~41px / 580px)

Description Length0 chars

Recommended: 120-160 chars

Issues (3)

• Missing meta description — important for click-through rates in SERPs
• Missing H1 tag — every page should have exactly one H1
• Most images missing alt text (8/9) — critical for accessibility and SEO

12 issues found

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Local SEO

Local Search Readiness

8/100

Poor

3 12 2

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

D40/100

Bot Access

20/25

Machine Read.

11/25

Schema Data

0/25

Citation

9/25

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

nav

Text ratio:14%

Words:320

Token eff.:Optimal

Sections/1K:3.1

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary50w

Descriptive Headingsavg 7w

Canonical URL

Open Graph0/3

Twitter Card0/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (8)

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.

53/100

Passed

Critical

Warnings

Images & Alt Text

5/20

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

Semantic Structure

9/20

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

Forms & Inputs

12/15

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

3/15

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.

35/100

114 mg

CO₂e / view

923.3 KB

Page Weight

80%

Cleaner Than

New Visitor

131 mg

Returning (cached)

65 mg

Annual (10K/mo)

13.7 kg

Emission Segments

Data Center

26 mg

Network

27 mg

Device

61 mg

Resource Breakdown

JavaScript

322.2 KB

Images

157.4 KB

CSS

433.8 KB

HTML

9.9 KB

Green Hosting Not Verified

Telmex Argentina S.A

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

No SSL

No WAF

N/A

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HTTP Headers

Developer Console

content-type

text/html

date

Fri, 29 May 2026 21:15:20 GMT

server

lighttpd/1.4.35

transfer-encoding

chunked

x-powered-by

PHP/5.3.9

set-cookie

TRACKID

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.isbn.org.ar

Domain Information

isbn.org.ar

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.

58/100

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.

Viewport

width=device-width, initial-scale=1.0

2 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Open Sans

WCAG Partial

43/100

Readability

/30

11/30

13px · LH 2.30

Hierarchy

/20

7/20

WCAG

/25

14/25

3.18:1 min contrast

Performance

/25

11/25

1 font · 4 req

Heading Font

Open Sans

Sans

Body Font

Open Sans

Sans13px

Contrast Ratio

3.18:1

41 issues

Reading Comfort

~39 CPL

Narrow lines

25px

13px

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

⚠️ Wide line spacing (2.30). 1.4–1.6 is optimal for body text.

❌ Very complex text: Flesch score 0/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 41 elements below WCAG AA threshold (min 3.2:1).

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

✅ Lean font stack: 1 font families keeps load times fast.

Buy on MyFontsFlesch 0

Color Palette

12 unique colors

Light

#ffffff

Background· 67.8%

#0779bf

Primary· 7.2%

#b61b21

Accent· 4.6%

#d8b363

Accent· 3.5%

#541e5d

Accent· 3.5%

#05568c

Accent· 3%

#258b7d

Accent· 3%

#eeede6

Secondary· 2.8%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(4)google-analytics.com(1)niko-ngx-schema.com(1)

Website Identity

isbn.org.ar

registrolibros@editores.org.ar

Location detected: 🇦🇷 Argentinavia tld

Social Profiles

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Last analyzed: 29 May 2026 at 21:15

Historical Analysis & Change Tracking