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SGSiteGraph

nsf.gov

NSF - U.S. National Science Foundation

Last scanned Jul 21, 2026, 11:40 AM · 2 views

90

Overall score

Excellent

Top issues to fix

3 issues found · 1 high priority

  • Missing Content-Security-Policy header

    Security

    Add a CSP to control which sources can run scripts — the strongest single defense against XSS.

  • 1 cookie without Secure/HttpOnly flags

    Security

    Set Secure and HttpOnly on session cookies so they can't leak over HTTP or be read by injected scripts.

  • No structured data (JSON-LD) found

    SEO

    Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.

Summary

NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. This website uses Apache hosted on AWS behind CloudFront CDN. SEO is excellent (90/100) and accessibility is excellent (100/100). Security scores excellent (90/100) and performance good (80/100). Top issue: No structured data (JSON-LD) found.

90

SEO

1 issue(s) found

80

Performance

2.61 s

90

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

FacebookX (Twitter)InstagramYouTubeLinkedIn

Contact

Email, phone, and address published on this site's own pages.

Meta tags

Title
NSF - U.S. National Science Foundation
Description
NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.
Canonical
https://www.nsf.gov/
Language
en
Charset
utf-8
Viewport
width=device-width, initial-scale=1.0
Robots meta
Manifest

OpenGraph & Twitter Card

OpenGraph

og:title
NSF - U.S. National Science Foundation
og:description
NSF's mission is to advance the progress of science, a mission accomplished by funding proposals for research and education made by scientists, engineers, and educators from across the country.
og:type
website
og:url
https://www.nsf.gov/

Twitter Card

twitter:card
summary_large_image
twitter:title
NSF - U.S. National Science Foundation
twitter:description
—

Technologies

Detected frameworks, languages, and tools.

DrupalApache

Hosting & CDN

Hosting provider
AWS
CDN provider
CloudFront
IP address
3.174.255.18
ASN
AS16509 (AMAZON-02 - Amazon.com, Inc., US)

DNS records

TypeValue
A
  • 3.174.255.18
  • 3.174.255.112
  • 3.174.255.82
  • 3.174.255.48
AAAA
  • 2600:9000:2912:ec00:9:20c4:b200:93a1
  • 2600:9000:2912:fe00:9:20c4:b200:93a1
  • 2600:9000:2912:8400:9:20c4:b200:93a1
  • 2600:9000:2912:2600:9:20c4:b200:93a1
  • 2600:9000:2912:2000:9:20c4:b200:93a1
  • 2600:9000:2912:5200:9:20c4:b200:93a1
  • 2600:9000:2912:2400:9:20c4:b200:93a1
  • 2600:9000:2912:3e00:9:20c4:b200:93a1
MX—
TXT—
NS
  • ns-1410.awsdns-48.org
  • ns-587.awsdns-09.net
  • ns-126.awsdns-15.com
  • ns-1568.awsdns-04.co.uk
CAA—
CNAME
  • d3qhdjjfn74kaw.cloudfront.net
IPv6 supportYes

TLS / SSL certificate

Version
TLS 1.3
Issuer
Amazon
Subject
*.nsf.gov
Valid from
May 29, 2026
Valid to
Dec 12, 2026
Days until expiry
144
SAN domains
*.nsf.gov

Security headers

  • Strict-Transport-SecurityEnabled
  • Content-Security-PolicyMissing
  • X-Frame-OptionsEnabled
  • X-Content-Type-OptionsEnabled
  • Referrer-PolicyMissing
  • Permissions-PolicyMissing

Compression: gzip · 1 cookie(s) observed

Content & assets

Headings

H1 1 · H2 10 · H3 7

Links

83 internal · 12 external · 0 broken

Images

29 total · 0 missing alt

Scripts / Styles

16 scripts · 2 stylesheets

JS / CSS size

298 KB · 1.1 MB

Page size

78.5 KB

Robots.txt & Sitemap

robots.txt
Found
Disallow rules
53
sitemap.xml
Found
URLs in sitemap
-1

SEO issues

  • No structured data (JSON-LD) found

Accessibility issues

No accessibility issues detected.

Scan details

Requested URL
https://nsf.gov
Final URL
https://www.nsf.gov/
HTTP status
200
HTTP version
HTTP/2
Response time
2.61 s
HTML size
78.5 KB
Redirect chain
https://nsf.gov → https://www.nsf.gov/

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Frequently asked questions

What technology does nsf.gov use?
nsf.gov is built with Drupal, Apache.
Is nsf.gov secure (HTTPS)?
Yes. nsf.gov uses TLS 1.3 with a certificate issued by Amazon, valid until Dec 12, 2026.
Who hosts nsf.gov?
nsf.gov is hosted on AWS, behind CloudFront CDN.
What is nsf.gov's SEO score?
nsf.gov scored 90/100 for SEO in the latest analysis (excellent).
What is nsf.gov's overall website score?
nsf.gov has an overall SiteGraph score of 90/100, combining SEO, performance, security, and accessibility.