21stcenturysciencetech.com

https://21stcenturysciencetech.com· First analyzed 30 May 2026· Updated 30 May 2026

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Mobile

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Hosting Provider

bigpiph.com

IP Address

108.167.158.45

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Ashburn, United States

ASN

AS31898

Organization

bigpiph.com

Server

Nginx

CDN

Proxy Cache

Nameservers

cns284.hostgator.com.cns283.hostgator.com.

Performance

100

Core Web Vitals

Weight

First Contentful Paint

263 ms10%

Speed Index

342 ms10%

Largest Contentful Paint

—25%

Total Blocking Time

0.0 ms30%

Cumulative Layout Shift

0.00025%

673 KB

47 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

bigpiph.com

CDN

Proxy Cache

Technology Stack

1 Technologies Detected

Web Servers

Nginxv1.27.2

SEO Analysis

D42/100

Meta Tags4/15

Content12/12

Headings1/8

Technical7/25

E-E-A-T0/7

Images4/7

Links5/5

URL5/5

Social0/5

Freshness0/4

Mobile1/4

Indexability3/3

21stcenturysciencetech.com21stcenturysciencetech.com

21st Century Home Page

No description available for this page.

Title Length22 chars

Recommended: 50-60 chars (~137px / 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
• Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

15 issues found

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Crawlability

Sitemap

Type: standard

15 URLs

robots.txt

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.

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AI & LLM Readiness

F33/100

Bot Access

20/25

Machine Read.

9/25

Schema Data

0/25

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

blockquotes

Text ratio:18%

Words:1,612

Token eff.:Optimal

Depth:1/5

Structured Data

No Schema

Citation Readiness

Opening Summary20w

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 (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.

58/100

Passed

Critical

Warnings

Images & Alt Text

15/20

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

Semantic Structure

4/20

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

14/15

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.

34/100

83 mg

CO₂e / view

673.2 KB

Page Weight

80%

Cleaner Than

New Visitor

95 mg

Returning (cached)

48 mg

Annual (10K/mo)

10.0 kg

Emission Segments

Data Center

19 mg

Network

20 mg

Device

45 mg

Resource Breakdown

Images

560.5 KB

CSS

50.4 KB

HTML

62.3 KB

Green Hosting Not Verified

bigpiph.com

6 recommendations

•Carbon footprint recommendation preview...

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Security Score

0%Critical

Static / Informational

No SSL

No WAF

nulld

Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

connection

content-type

text/html

date

Sat, 30 May 2026 15:03:22 GMT

last-modified

Wed, 03 May 2017 19:46:17 GMT

server

nginx/1.27.2

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

MX Records (1)

mail.21stcenturysciencetech.com

Domain Information

21stcenturysciencetech.com

Domain Age

26y 7m

Created

23.10.1999

Expires

23.10.2028

Last Updated

24.08.2023

Registrar

Network Solutions, LLC

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.

27/100

Not Mobile Friendly

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.

5 recommendations

•Mobile compatibility recommendation preview...

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Typography & Readability

Helvetica

WCAG Partial

55/100

Readability

/30

13/30

13px · LH --

Hierarchy

/20

8/20

WCAG

/25

14/25

1:1 min contrast

Performance

/25

20/25

System fonts

Heading Font

Helvetica

Body Font

Helvetica

Sans13px

Contrast Ratio

1:1

6 issues

Reading Comfort

~40 CPL

Narrow lines

14px

13px

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

⚠️ Hard to read: Flesch score 34/100. Simplify sentences for wider reach.

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

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

✅ System fonts: Zero font loading delay — best possible LCP impact.

Flesch 34

Color Palette

9 unique colors

Light

#f0f2f2

Background· 2.1%

#0d0f13

Primary· 53.6%

#fffffe

Accent· 10.3%

#363d54

Secondary· 6.8%

#7591a8

Secondary· 6.6%

#cfb9a5

Secondary· 6.5%

#694a57

Secondary· 5.2%

#010002

Accent· 5%

Business & Marketing Stack

1 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

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Website Identity