crossref.org
crossref.org is ranked #5,818 in the Tranco list of the world's most popular websites (list of Oct 13, 2026), up 483 places in four weeks. The domain was registered on Dec 1, 1999, 26 years, 10 months ago, through Register.com - Network Solutions, LLC, and is paid up until Dec 1, 2028. Its homepage uses jQuery, Hugo, Bootstrap, Font Awesome and Matomo. It is served through Amazon CloudFront, cdnjs and jsDelivr.
Popularity rank
#5,818 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: #5,818.
Domain registration
- Registered
- Dec 1, 1999 (26 years, 10 months ago)
- Expires
- Dec 1, 2028
- Registrar
- Register.com - Network Solutions, LLC
- Name servers
ns-1052.awsdns-03.org,ns-1629.awsdns-11.co.uk,ns-473.awsdns-59.com,ns-659.awsdns-18.net- DNSSEC
- Not signed
From the registry's public RDAP record, checked Oct 1, 2026.
Technology stack
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.
13 passed · 8 warnings · 2 failed
Content
- !Title8 characters — aim for 15–65
- ✓Meta description126 characters
- ✕H1 headingMissing in the served HTML
- ✓Subheadings4 H2 headings
- ✕Image alt text2 of 9 images have no alt text
- ✓Content lengthAbout 624 words
Indexing
- ✓IndexableNo noindex directive
- ✓Canonical URLhttps://www.crossref.org/
- ✓robots.txtFound
- ✓XML sitemapFound
- ✓Language attributeen-us
- !Structured dataNo JSON-LD or microdata
Social sharing
- ✓Open GraphTitle, description and image set
- !Twitter / X cardMissing
Technical
- ✓HTTPSServed over HTTPS
- ✓Mobile viewportFound
- ✓FaviconFound
- ✓Character encodingutf-8
Security headers
- !Strict-Transport-SecurityNot set
- !Content-Security-PolicyNot set
- !Clickjacking protectionNot set
- !X-Content-Type-OptionsNot set
- !Referrer-PolicyNot set
Server response
- Final URL
https://www.crossref.org/- HTTP status
- 200
- Server
AmazonS3- Response time
- 64 ms (first byte 64 ms, from our scanner in a US data centre)
- HTML size
- 34 KB
- Compression
- br
Sites with a similar tech stack
| Rank | Website |
|---|---|
| #210 | doi.org |
| #8,255 | moe.gov.my |
| #3,281 | isc.org |
| #4,431 | syncthing.net |
| #5,792 | garanteprivacy.it |
Sites ranked near crossref.org
| Rank | Website | Registered |
|---|---|---|
| #5,813 | uni-koeln.de | — |
| #5,814 | orange.com | 1993 |
| #5,815 | atol.ru | — |
| #5,816 | eonline.com | 1995 |
| #5,817 | uno-geo-dns.com | 2026 |
| #5,819 | thermofisher.com | 2006 |
| #5,820 | elcomercio.pe | — |
| #5,821 | aptoide.com | 2009 |
| #5,822 | hani.co.kr | 1995 |
| #5,823 | r2.dev | 2022 |
Questions about crossref.org
How popular is crossref.org?
crossref.org is #5,818 worldwide in the Tranco list published Oct 13, 2026.
How old is crossref.org?
crossref.org was registered on Dec 1, 1999, which makes the domain 26 years, 10 months old.
What is crossref.org built with?
We detected jQuery, Hugo, Bootstrap, Font Awesome, Matomo, Amazon CloudFront, cdnjs and jsDelivr on its homepage.
Who is the registrar of crossref.org?
Register.com - Network Solutions, LLC, according to the registry's RDAP record.