zlib.net

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zlib.net is ranked #4,228 in the Tranco list of the world's most popular websites (list of Oct 13, 2026), up 13 places in four weeks. The domain was registered on Mar 16, 2002, 24 years, 6 months ago, through GoDaddy.com, LLC, and is paid up until Mar 16, 2029. It is served by Apache.

Global rank

#4,228

– this week

Domain age

24 years

since Mar 16, 2002

Technologies

detected on the homepage

SEO score

63/100

homepage checks

Popularity rank

#4,228 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: #4,095.

Weekly Tranco rank (lower is more popular).

See where zlib.net sits in the top 10,000

Domain registration

Registered: Mar 16, 2002 (24 years, 6 months ago)
Expires: Mar 16, 2029
Registrar: GoDaddy.com, LLC
Name servers: ns1.a2hosting.com, ns2.a2hosting.com, ns3.a2hosting.com, ns4.a2hosting.com
DNSSEC: Not signed

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

Technology stack

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.

63/100

https://zlib.net/

zlib Home Site

(no meta description)

9 passed · 11 warnings · 3 failed

Content

!Title14 characters — aim for 15–65
✕Meta descriptionMissing
✓H1 headingExactly one H1
!SubheadingsNo H2 headings in the served HTML
✓Image alt textAll 73 images have alt text
✓Content lengthAbout 1,680 words

Indexing

✓IndexableNo noindex directive
!Canonical URLMissing
✓robots.txtFound
!XML sitemapNot found
!Language attributeMissing
!Structured dataNo JSON-LD or microdata

Social sharing

✕Open GraphMissing
!Twitter / X cardMissing

Technical

✓HTTPSServed over HTTPS
✕Mobile viewportMissing
!FaviconMissing
!Character encodingISO-8859-1

Security headers

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

Server response

Final URL: https://zlib.net/
HTTP status: 200
Server: Apache
Response time: 7.00 s (first byte 7.00 s, from our scanner in a US data centre)
HTML size: 31 KB
Compression: gzip

Sites ranked near zlib.net

Rank	Website	Registered	Built with
#4,223	squid-cache.org	1998	Apache
#4,224	permutive.com	2014	WordPress, WP Engine, cdnjs
#4,225	mobilityware.com	2003	Nginx
#4,226	optable.co	—	Webflow, Cloudflare, jsDelivr
#4,227	awsapprunner.com	2021	—
#4,229	nanit.com	2006	Shopify, Cloudflare, Google Tag Manager
#4,230	stickyadstv.com	2009	—
#4,231	arcticwolf.net	1998	—
#4,232	r7ops.com	2014	—
#4,233	ebaycdn.net	2019	—

Questions about zlib.net

How popular is zlib.net?

zlib.net is #4,228 worldwide in the Tranco list published Oct 13, 2026.

How old is zlib.net?

zlib.net was registered on Mar 16, 2002, which makes the domain 24 years, 6 months old.

What is zlib.net built with?

We detected Apache on its homepage.

Who is the registrar of zlib.net?

GoDaddy.com, LLC, according to the registry's RDAP record.