ext0.dev

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

ext0.dev serves a website of its own. It answers on both IPv4 and IPv6, with a valid TLS certificate.

4,228 other domains share an IP address with it.

The most recent crawl returned the page title “ext0 — All-in-One Developer Tools for Your Browser” and 138,318 bytes of HTML. The site links to X.

Domain properties

Property	Value	Explanation
Top-level domain	.dev	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	no	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	4,228	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": "ext0.dev"}'

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	Google Trust Services
Valid from	9/24/2026
Valid to	12/23/2026
Time until expiry	63 days

Last successful crawl

Title	ext0 — All-in-One Developer Tools for Your Browser
Description	Open-source Chrome extension. CSS Inspector, Color Picker, Page Ruler, Responsive Viewer, JSON Formatter, and Export Element — all without leaving your browser.
Content-Length	138,318 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
104.21.5.83	2/4/2026
172.67.133.53	2/4/2026
84.32.84.32	1/28/2026

IPv6 address	Last updated
2606:4700:3034:0:0:0:6815:553	7/25/2026
2606:4700:3036:0:0:0:ac43:8535	7/25/2026
2606:4700:3030:0:0:0:ac43:8535	2/4/2026
2606:4700:3033:0:0:0:6815:553	2/4/2026

Name server	Last updated
melina.ns.cloudflare.com	2/4/2026
rodrigo.ns.cloudflare.com	2/4/2026
ns1.dns-parking.com	1/28/2026
ns2.dns-parking.com	1/28/2026

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

104.21.5.83 1,066 domains · here since 9/19/2026

Domain	On this IP since
zy14nqn.cn	9/13/2026
zulorentivoxa.sbs	9/14/2026
zorbatech.com	9/22/2026
zonumif.my	10/10/2026
zombietapes.com	9/13/2026
zogh.cn	9/22/2026
zhaopum.me	9/12/2026
zetifield.com	9/23/2026
zeiken.cl	9/15/2026
ywyuanbao.com	9/16/2026
ywtkmv.com	10/11/2026
yunshenchu.top	10/7/2026
and 1,053 more

172.67.133.53 1,066 domains · here since 9/19/2026

Domain	On this IP since
zy14nqn.cn	9/13/2026
zulorentivoxa.sbs	9/14/2026
zorbatech.com	9/22/2026
zonumif.my	10/10/2026
zombietapes.com	9/13/2026
zogh.cn	9/22/2026
zhaopum.me	9/12/2026
zetifield.com	9/23/2026
zeiken.cl	9/15/2026
ywyuanbao.com	9/16/2026
ywtkmv.com	10/11/2026
yunshenchu.top	10/7/2026
and 1,053 more

2606:4700:3034::6815:553 1,048 domains · here since 9/19/2026

Domain	On this IP since
zy14nqn.cn	9/13/2026
zulorentivoxa.sbs	9/14/2026
zorbatech.com	9/22/2026
zonumif.my	10/10/2026
zombietapes.com	9/13/2026
zogh.cn	9/22/2026
zetifield.com	9/23/2026
zeiken.cl	9/15/2026
ywyuanbao.com	9/16/2026
ywtkmv.com	10/11/2026
yunshenchu.top	10/7/2026
yue7777.com	9/30/2026
and 1,035 more

2606:4700:3036::ac43:8535 1,048 domains · here since 9/19/2026

Domain	On this IP since
zy14nqn.cn	9/13/2026
zulorentivoxa.sbs	9/14/2026
zorbatech.com	9/22/2026
zonumif.my	10/10/2026
zombietapes.com	9/13/2026
zogh.cn	9/22/2026
zetifield.com	9/23/2026
zeiken.cl	9/15/2026
ywyuanbao.com	9/16/2026
ywtkmv.com	10/11/2026
yunshenchu.top	10/7/2026
yue7777.com	9/30/2026
and 1,035 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!