crfs.com

https://crfs.com· First analyzed 02 Jun 2026· Updated 02 Jun 2026

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crfs.com

Mobile

Sponsored

Hosting Provider

HubSpot CMS

hubspot.com

IP Address

199.60.103.179

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Cambridge, United States

ASN

AS209242

Organization

HubSpot, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

maria.ns.cloudflare.com.amir.ns.cloudflare.com.

Performance

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%

1.5 MB

82 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Frontend

Styling

Bootstrap

CMS

HubSpot CMS

Infrastructure

Hosting

HubSpot CMS

CDN

Cloudflare

Technology Stack

13 Technologies Detected

Analytics

CSS Frameworks

Libraries

UI Components

Icon Libraries

Tag Managers

Marketing

CDN

Customer Support

SEO Analysis

B70/100

Meta Tags13/15

Content3/12

Headings8/8

Technical18/25

E-E-A-T0/7

Images7/7

Links5/5

URL5/5

Social4/5

Freshness0/4

Mobile4/4

Indexability3/3

crfs.comcrfs.com

Home - CRFS - Spectrum Monitoring and Geolocation

CRFS creates deployable systems to detect, identify, and geolocate RF signals in complex spectrum environments.

Title Length49 chars

Recommended: 50-60 chars (~306px / 580px)

Description Length113 chars

Recommended: 120-160 chars

Issues (1)

• Very thin content (8 words). Search engines need substantial content for ranking.

3 issues found

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Crawlability

Sitemap

Type: standard

520 URLs

robots.txt

8 rules

Local SEO

Local Search Readiness

7/100

Poor

3 15 2

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

Sponsored

AI & LLM Readiness

F34/100

Bot Access

20/25

Machine Read.

7/25

Schema Data

0/25

Citation

7/25

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:3%

Words:2,541

Token eff.:Optimal

Structured Data

No Schema

Citation Readiness

Opening Summary

Descriptive Headings

Canonical URL

Open Graph2/3

Twitter Card3/3

Language Tag

Publish Date

Author Info

Lists

Tables

TL;DR / Summary

About Page Link

Recommendations (12)

AI readiness recommendation preview...

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Sponsored

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.

71/100

Passed

Critical

Warnings

Images & Alt Text

20/20

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

Semantic Structure

8/20

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

7/15

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

ARIA & Roles

6/15

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

2 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.

39/100

189 mg

CO₂e / view

1.5 MB

Page Weight

60%

Cleaner Than

New Visitor

216 mg

Returning (cached)

108 mg

Annual (10K/mo)

22.7 kg

Emission Segments

Data Center

42 mg

Network

45 mg

Device

102 mg

Resource Breakdown

JavaScript

61.0 KB

Images

655.2 KB

CSS

751.7 KB

HTML

57.1 KB

Other

4.6 KB

Green Hosting Not Verified

HubSpot CMS

5 recommendations

•Carbon footprint recommendation preview...

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Security Score

66%Fair

Interactive

HTTPS

WAF

31d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Google Trust Services

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-256

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

05.04.2026

Valid Until

04.07.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

www.crfs.com

SHA-256 Fingerprint

69:11:72:D7:52:7E:D0:40:0B:E5:71:20:FB:92:4B:A1:9C:F1:4A:29...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=86400

cache-control

🔴 No Cache(no-store, no-cache, must-revalidate, max-age=5)

cf-ray

a057ca367adaa115-BOS

content-encoding

⚡ Brotli(br)

content-security-policy

upgrade-insecure-requests

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

crfs-com.mail.protection.outlook.com

Domain Information

crfs.com

Domain Age

26y 7m

Created

04.11.1999

Expires

04.11.2026

Last Updated

12.06.2024

Registrar

Cloudflare, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

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.

76/100

Mobile Friendly173 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

1 recommendation

•Mobile compatibility recommendation preview...

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Typography & Readability

Fira Sans

WCAG Partial

75/100

Readability

/30

20/30

16px · LH 1.33

Hierarchy

/20

19/20

3.12x ratio · ✓ H1→H6

WCAG

/25

18/25

1:1 min contrast

Performance

/25

18/25

1 font · 4 req

Heading Font

Fira Sans

Sans50px

Body Font

Fira Sans

Sans16px

Contrast Ratio

1:1

6 issues

Reading Comfort

~34 CPL

Narrow lines

50px

14px

32px

24px

16px

Minor Second

Scale

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

⚠️ Tight line spacing (1.33). Increase to 1.4–1.6 for better readability.

❌ Very complex text: Flesch score 1/100. Consider shorter sentences and simpler words.

⚠️ 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.

✅ Strong hierarchy: Headlines are 3.1x larger than body text.

Buy on MyFontsFluid Type (rem)Flesch 1

Color Palette

6 unique colors

Light

#ffffff

Background· 24.1%

#e1e6ec

Secondary· 31.799999999999997%

#000339

Primary· 18%

#4e5b72

Secondary· 10.1%

#20213a

Secondary· 8.6%

#98b5c7

Secondary· 7.3%

Business & Marketing Stack

7 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

Google AnalyticsFree

HotjarMid-Market

Lucky OrangeSMB

Google Tag ManagerFree

User behavior and product analytics

Privacy & Cookies

IubendaSMB

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.iubenda.com(3)local(3)cs.iubenda.com(2)crfs.com(2)js.hs-analytics.net(1)

Website Identity

crfs.com

26 years old

Location detected: 🇺🇸 United Statesvia ip

Cloudflare, Inc.📧 Microsoft 365en

Social Profiles

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Last analyzed: 02 Jun 2026 at 16:21

Historical Analysis & Change Tracking