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nas.edu

https://nas.edu· First analyzed 26 Apr 2026· Updated 26 Apr 2026
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nas.edu
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Mobile

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Hosting Provider

National Academy of Sciences

IP Address

144.171.1.16

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Washington, United States

ASN

AS7301

Organization

National Academy of Sciences

CDN

Fastly

Nameservers

a6-66.akam.net.a28-67.akam.net.a1-44.akam.net.a11-64.akam.net.+2 more

Performance

93

Core Web Vitals

Weight

First Contentful Paint
1.3 s10%
Speed Index
1.6 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
59 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Tailwind CSS
CMS
HubSpot CMS
Infrastructure
Hosting
National Academy of Sciences
CDN
Fastly

Technology Stack

7 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Microsoft Clarity

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Marketing

1
HubSpot

Advertising

1
LinkedIn Ads

SEO Analysis

B73/100
21
8
0
Meta Tags15/15
Content11/12
Headings6/8
Technical15/25
E-E-A-T3/7
Images4/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
N
nas.edunas.edu

National Academies of Sciences, Engineering, and Medicine

Our work helps shape sound policies, inform public opinion, and advance the pursuit of science, engineering, and medicine.

Title Length57 chars

Recommended: 50-60 chars (~337px / 580px)

Description Length122 chars

Recommended: 120-160 chars

Issues (0)

    8 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    6 URLs

    6 sub-sitemaps

    robots.txt

    3 rules

    Allows all crawlers

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 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

    D42/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    0/25
    Citation
    11/25

    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:4%
    Words:2,217
    Token eff.:Optimal
    Sections/1K:4.5
    Depth:1/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary10w
    Descriptive Headingsavg 4.5w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    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.
    A
    80/100
    14
    Passed
    2
    Critical
    1
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    15/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    5/15
    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
    13/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    12/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •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.
    38/100
    C
    193 mg
    CO₂e / view
    1.5 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    221 mg
    vs
    Returning (cached)
    110 mg
    Annual (10K/mo)
    23.2 kg
    Emission Segments
    Data Center
    43 mg
    Network
    46 mg
    Device
    104 mg
    Resource Breakdown
    JavaScript
    128.6 KB
    Images
    3.8 KB
    CSS
    39.6 KB
    Fonts
    726.6 KB
    HTML
    378.2 KB
    Other
    285.9 KB
    Green Hosting Not Verified
    National Academy of Sciences
    6 recommendations
    • •Carbon footprint recommendation preview...
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    F

    Security Score

    25%Critical
    Critical / Transactional

    HTTPS

    No WAF

    168d

    Certificate Details

    Type

    Extended Validation (EV)

    Certificate Authority

    DigiCert Inc

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.2

    HTTP Protocol

    HTTP/1.1

    Valid From

    27.03.2026

    Valid Until

    11.10.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (7)

    www.nationalacademies.orgnationalacademies.orgnas.eduwww.nas.educyrus.nas.eduwww.national-academies.orgnational-academies.org

    SHA-256 Fingerprint

    0D:D6:4B:C0:8F:81:A3:90:3F:BE:1F:F6:CF:8C:00:64:DA:CF:8D:95...

    Top Recommendations

    Security recommendation preview

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    Upgrade to view header details

    HTTP Headers

    Developer Console

    accept-ranges
    bytes
    age
    108
    connection
    keep-alive
    content-length
    386964
    date
    Sun, 26 Apr 2026 10:38:19 GMT
    strict-transport-security
    max-age=31557600
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    90

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (2)

    nas-edu.mail.protection.outlook.com
    nas-edu.mail.protection.outlook.com

    Domain Information

    nas.edu

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    Privacy policy page linked

    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.
    B
    79/100
    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.
    Viewport
    width=device-width, initial-scale=1
    1 recommendation
    • •Mobile compatibility recommendation preview...
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    Typography & Readability

    Merriweather + Merriweather Sans

    WCAG AAA
    70/100
    Readability
    /30
    18/30

    14px · LH 1.60

    Hierarchy
    /20
    15/20

    3.65x ratio

    WCAG
    /25
    24/25

    7.6:1 min contrast

    Performance
    /25
    13/25

    2 fonts · 5 req

    Heading Font

    Merriweather

    Serif51px

    Body Font

    Merriweather Sans

    Sans14px

    Contrast Ratio

    7.6:1

    WCAG AAA (≥7:1)

    Reading Comfort

    ~39 CPL

    Narrow lines
    51px
    h1
    35px
    h2
    40px
    h3
    14px
    p

    ⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

    ✅ Optimal line spacing: 1.60 ratio (ideal range 1.4–1.6).

    ❌ Very complex text: Flesch score 13/100. Consider shorter sentences and simpler words.

    ✅ WCAG AAA contrast: All text meets 7:1 ratio (min 7.6:1).

    ⚠️ Minor heading issue: 0 level skip(s) detected. Maintain sequential order for screen readers.

    ✅ Strong hierarchy: Headlines are 3.6x larger than body text.

    Buy on MyFontsFluid Type (rem)Flesch 13

    Color Palette

    9 unique colors
    6.65:1 AA Light
    #cfd2cd
    Other· 6.8%
    #40423e
    Other· 6.5%
    #f6f6f8
    Background· 58.30000000000001%
    #151d10
    Primary· 5.7%
    #b9b4a7
    Secondary· 5.7%
    #98a3ab
    Secondary· 4.7%

    Business & Marketing Stack

    7 Tools Detected

    Enterprise

    CRM Systems

    1
    HubSpotMid-Market

    Customer Relationship Management platforms

    Behavior Analytics

    3
    Google Tag ManagerFree
    Google AnalyticsFree
    Microsoft ClarityFree

    User behavior and product analytics

    Advertising

    1
    LinkedIn AdsEnterprise

    Ad platforms and retargeting pixels

    Privacy & Cookies

    2
    OneTrustEnterprise
    CookiebotMid-Market

    Cookie consent and privacy compliance tools

    4

    Categories

    7

    Total Tools

    2

    Enterprise

    2

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    15 Resources

    14
    Scripts
    1
    Styles
    7
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(2)snap.licdn.com(1)js.hs-banner.com(1)js.hscollectedforms.net(1)js.hsadspixel.net(1)

    Website Identity

    nas.edu

    Location detected: 🇺🇸 United Statesvia ip
    📧 Microsoft 365en

    Sponsored

    Last analyzed: 26 Apr 2026 at 10:38

    Historical Analysis & Change Tracking