nsf.gov

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nsf.gov is ranked #4,589 in the Tranco list of the world's most popular websites (list of Oct 13, 2026), up 23 places in four weeks. The domain was registered on Oct 2, 1997, 29 years ago, through get.gov, and is paid up until Sep 15, 2027. Its homepage uses Drupal. It is served through Amazon CloudFront and jsDelivr by Apache.

Global rank

#4,589

▲ 19 this week

Domain age

29 years

since Oct 2, 1997

Technologies

detected on the homepage

SEO score

93/100

homepage checks

Popularity rank

#4,589 of the top 1 million sites in the Tranco research ranking, which averages several traffic and DNS sources over 30 days. Best rank in the period shown: #4,454.

Weekly Tranco rank (lower is more popular).

See where nsf.gov sits in the top 10,000

Domain registration

Registered: Oct 2, 1997 (29 years ago)
Expires: Sep 15, 2027
Registrar: get.gov
Name servers: ns1.nsf.gov, ns2.nsf.gov, ns3.nsf.gov
DNSSEC: Signed

From the registry's public RDAP record, checked Oct 1, 2026.

Technology stack

CMS & site builders

Drupal 10

CDN

Amazon CloudFront jsDelivr

Web servers

Apache

Detected from the homepage HTML and response headers on Oct 14, 2026. Tools loaded only after scripts run (or after consent banners) may be missing.

Homepage SEO check

Checked from the HTML our scanner received on Oct 14, 2026. Content added later by JavaScript isn't counted.

93/100

https://www.nsf.gov/

NSF - U.S. National Science Foundation

NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.

20 passed · 3 warnings · 0 failed

Content

✓Title38 characters
✓Meta description113 characters
✓H1 headingExactly one H1
✓Subheadings10 H2 headings
✓Image alt textAll 29 images have alt text
✓Content lengthAbout 634 words

Indexing

✓IndexableNo noindex directive
✓Canonical URLhttps://www.nsf.gov/
✓robots.txtFound
✓XML sitemapFound
✓Language attributeen
!Structured dataNo JSON-LD or microdata

Social sharing

✓Open GraphTitle, description and image set
✓Twitter / X cardsummary_large_image

Technical

✓HTTPSServed over HTTPS
✓Mobile viewportFound
✓FaviconFound
✓Character encodingutf-8

Security headers

✓Strict-Transport-SecuritySet
!Content-Security-PolicyNot set
✓Clickjacking protectionSet
✓X-Content-Type-OptionsSet
!Referrer-PolicyNot set

Server response

Final URL: https://www.nsf.gov/
HTTP status: 200
Server: Apache
Response time: 47 ms (first byte 45 ms, from our scanner in a US data centre)
HTML size: 79 KB
Compression: gzip

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#5,028	cbp.gov	Drupal, jsDelivr, Apache
#6,305	cigna.com	Drupal, Amazon CloudFront, jsDelivr
#3,065	uspto.gov	Drupal, Amazon CloudFront, Apache
#3,148	cvent.com	Drupal, Amazon CloudFront, jsDelivr
#4,481	bnf.fr	Drupal, jsDelivr, Apache
#8,348	skylark.co.jp	Amazon CloudFront, jsDelivr, Apache

Sites ranked near nsf.gov

Rank	Website	Registered	Built with
#4,584	manualslib.com	2012	Cloudflare
#4,585	pcre.org	2000	Nginx
#4,586	oppo.com	1998	Nginx, jQuery, Google Tag Manager
#4,587	d-53.jp	—	—
#4,588	google.com.na	—	—
#4,590	speedtestcustom.com	2016	—
#4,591	adsurge.com	2000	Amazon CloudFront
#4,592	allawntech.com	2020	Nginx
#4,593	statsig.com	1998	Amplitude, Google Analytics, Google Tag Manager
#4,594	yr.no	1999	—

Questions about nsf.gov

How popular is nsf.gov?

nsf.gov is #4,589 worldwide in the Tranco list published Oct 13, 2026.

How old is nsf.gov?

nsf.gov was registered on Oct 2, 1997, which makes the domain 29 years old.

What is nsf.gov built with?

We detected Drupal, Amazon CloudFront, jsDelivr and Apache on its homepage.

Who is the registrar of nsf.gov?

get.gov, according to the registry's RDAP record.