securityheaders.tools

Get an email when its DNS, website or certificate changes.

securityheaders.tools serves a website of its own over HTTPS. It answers on both IPv4 and IPv6, with a valid TLS certificate.

3,416 other domains share an IP address with it.

The most recent crawl returned the page title “Security Headers Checker: Grade and Fix in Minutes” and 7,441 bytes of HTML.

Domain properties

Property	Value	Explanation
Top-level domain	.tools	Statistics for all domains we know under this TLD.
Has website	yes	A website is hosted under the domain, which does not redirect to an external domain.
Has MX-record	no	The domain has an MX record.
External redirect	no	The domain redirects to another domain.
Redirect to https	yes	The domain redirects to https.
Redirect to www.	no	The domain redirects to www.domain.
Only with www.	no	The domain can only be reached with the subdomain "www".
Only DNS, no website	no	There are no A or AAAA records in DNS.
IP-Address	Both	Shows whether the domain only has IPv4 or IPv6 or both.
SSL-Certificate	valid	Shows whether the domain has a valid SSL certificate.
Redirects	0	Number of domains that redirect to this domain.
Reverse IP	3,416	Number of domains with the same IP(s).

This data through the API

The data on this page is also available as JSON: /lookup for the key facts, /reverseip, /redirect and /similar for the lists, and /dnshistory with Basic and Premium. A free account comes with an API key and 100 calls a day.

curl -X POST https://api.webxtrend.com/v1.0/lookup \
  -H 'Content-Type: application/json' \
  -d '{"token": "YOUR_TOKEN", "query": "securityheaders.tools"}'

Create a free account Read the API docs

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Websites whose start page offers something similar, found by comparing the text of their start pages, across languages. Near-identical copies, parking pages and error pages are left out. The full list of up to 100 comes through the API: similar websites.

Last SSL certificate

Issuer	Let's Encrypt
Valid from	9/9/2026
Valid to	12/8/2026
Time until expiry	46 days

Last successful crawl

Title	Security Headers Checker: Grade and Fix in Minutes
Description	Free security headers checker, HSTS checker and CSP checker: enter a URL, get a grade from A+ to F and the exact header line to send for each finding.
Content-Length	7,441 bytes

Title and description as published by the page itself in its own <title> and <meta name="description"> tags.

DNS history

IPv4 address	Last updated
104.21.71.66	9/17/2026
172.67.143.184	9/17/2026

IPv6 address	Last updated
2606:4700:3031:0:0:0:ac43:8fb8	9/17/2026
2606:4700:3035:0:0:0:6815:4742	9/17/2026

Name server	Last updated
beau.ns.cloudflare.com	9/17/2026
sandy.ns.cloudflare.com	9/17/2026

The five most recent states of each record type. The full history comes through the API: DNS history.

Most recent redirect domains

No domains found.

Reverse IP neighbours

2606:4700:3031::ac43:8fb8 854 domains · here since 9/23/2026

Domain	On this IP since
zzi.net.cn	10/15/2026
zytrium.info	9/15/2026
zolotoyarbuzbet-azf.top	9/19/2026
zmpvhjey.shop	9/22/2026
zlmtny.cn	9/20/2026
zirvebet-guncel2026.icu	9/23/2026
zinkra-casino-win.com	9/19/2026
zhongwenrijufree.baby	10/21/2026
zenites.com.br	9/18/2026
zeniscale.app	9/20/2026
zelayaran.com	9/16/2026
z6store.com	9/22/2026
and 841 more

2606:4700:3035::6815:4742 854 domains · here since 9/23/2026

Domain	On this IP since
zzi.net.cn	10/15/2026
zytrium.info	9/15/2026
zolotoyarbuzbet-azf.top	9/19/2026
zmpvhjey.shop	9/22/2026
zlmtny.cn	9/20/2026
zirvebet-guncel2026.icu	9/23/2026
zinkra-casino-win.com	9/19/2026
zhongwenrijufree.baby	10/21/2026
zenites.com.br	9/18/2026
zeniscale.app	9/20/2026
zelayaran.com	9/16/2026
z6store.com	9/22/2026
and 841 more

104.21.71.66 854 domains · here since 9/23/2026

Domain	On this IP since
zzi.net.cn	10/15/2026
zytrium.info	9/15/2026
zolotoyarbuzbet-azf.top	9/19/2026
zmpvhjey.shop	9/22/2026
zlmtny.cn	9/20/2026
zirvebet-guncel2026.icu	9/23/2026
zinkra-casino-win.com	9/19/2026
zhongwenrijufree.baby	10/21/2026
zenites.com.br	9/18/2026
zeniscale.app	9/20/2026
zelayaran.com	9/16/2026
z6store.com	9/22/2026
and 841 more

172.67.143.184 854 domains · here since 9/23/2026

Domain	On this IP since
zzi.net.cn	10/15/2026
zytrium.info	9/15/2026
zolotoyarbuzbet-azf.top	9/19/2026
zmpvhjey.shop	9/22/2026
zlmtny.cn	9/20/2026
zirvebet-guncel2026.icu	9/23/2026
zinkra-casino-win.com	9/19/2026
zhongwenrijufree.baby	10/21/2026
zenites.com.br	9/18/2026
zeniscale.app	9/20/2026
zelayaran.com	9/16/2026
z6store.com	9/22/2026
and 841 more

Sharing an address does not always mean sharing a server: on a CDN or a large hosting platform, millions of unrelated domains answer on the same few addresses. We measured how far that goes in Half the web sits on 276 IP addresses. The complete list of neighbours, also for an IP address, comes through the API: reverse IP lookup.

Dive into our data, search now!