undo.tech

undo.tech serves a website of its own over HTTPS and under www. It answers on IPv4 only, with a valid TLS certificate and MX records for mail.

1,985,017 other domains share an IP address with it.

The most recent crawl returned the page title “undo — local-first AI for your own computer” and 52,497 bytes of HTML.

Domain properties

Property	Value	Explanation
Top-level domain	.tech	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	yes	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.	yes	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	only IPv4	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	1,985,017	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": "undo.tech"}'

Create a free account Read the API docs

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Last SSL certificate

Issuer	Let's Encrypt
Valid from	8/17/2026
Valid to	11/15/2026
Time until expiry	27 days

Last successful crawl

Title	undo — local-first AI for your own computer
Description	Take a step back. undo is a home for controlled, private AI that runs on your own machine — no cloud required, no data leaving your device.
Content-Length	52,497 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
216.198.79.1	6/24/2026
91.195.240.94	12/7/2023

Mail server	Priority	Last updated
mx.zoho.eu	10	8/8/2026
mx2.zoho.eu	20	8/8/2026
mx3.zoho.eu	30	8/8/2026
mail.pickelhost.com	1	2/3/2026

Name server	Last updated
ns1djs.name.com	6/24/2026
ns2bls.name.com	6/24/2026
ns3npv.name.com	6/24/2026
ns4sxy.name.com	6/24/2026
ns1jlp.name.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

216.198.79.1 1,985,017 domains · here since 9/22/2026

Domain	On this IP since
zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz.uk	10/9/2026
zzzzzly.online	9/22/2026
zzzzrakesh.me	9/19/2026
zzzznayu.ru	9/19/2026
zzzzdevelopment.com	10/13/2026
zzzzas.app	10/12/2026
zzzz.yt	9/19/2026
zzzz.lt	9/15/2026
zzzxc.com	10/9/2026
zzztools.com	9/20/2026
zzzsunny.space	9/13/2026
zzzril.art	9/22/2026
and 1,985,004 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!