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385.2 M

Domains known to webXtrend

9.8 M

New domains in the last 30 days

62.8 M

Social media profiles detected

rustmail.app

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

rustmail.app serves a website of its own over HTTPS. It answers on both IPv4 and IPv6, with a valid TLS certificate and MX records for mail.

4,418 other domains share an IP address with it.

The most recent crawl returned the page title “RustMail · SMTP Mail Catcher” and 19,648 bytes of HTML.

Domain properties

Property Value Explanation
Top-level domain .app 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. 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 4,418 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": "rustmail.app"}'

Create a free account Read the API docs

Detected social media networks

No social networks found on this website.

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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 9/15/2026
Valid to 12/14/2026
Time until expiry 52 days

Last successful crawl

Title RustMail · SMTP Mail Catcher
Description Catch and inspect outbound email from dev and CI. Single binary, nothing to install. Self-hosted, open source.
Content-Length 19,648 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
104.21.56.51 3/30/2026
172.67.177.253 3/30/2026
IPv6 address Last updated
2606:4700:3030:0:0:0:6815:3833 6/28/2026
2606:4700:3032:0:0:0:ac43:b1fd 6/28/2026
2606:4700:3031:0:0:0:6815:3833 3/30/2026
2606:4700:3033:0:0:0:ac43:b1fd 3/30/2026
Mail server Priority Last updated
in1-smtp.messagingengine.com 10 3/30/2026
in2-smtp.messagingengine.com 20 3/30/2026
Name server Last updated
aryanna.ns.cloudflare.com 3/30/2026
bruce.ns.cloudflare.com 3/30/2026

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

104.21.56.51 1,105 domains · here since 9/13/2026
Domain On this IP since
zwinnapanda.pl 9/17/2026
zt888gname.asia 9/17/2026
zs59276.com 9/17/2026
zruvgeduyw.shop 9/13/2026
zqgayq.asia 10/13/2026
zorototobonus20k.shop 9/21/2026
zolfara.ir 9/19/2026
zoe-veritas.com 9/14/2026
zielonyganek.pl 9/16/2026
zhuoyuketang.com 9/18/2026
zhuangabc.com 9/23/2026
zhoudongmin.cn 10/21/2026
and 1,092 more
172.67.177.253 1,105 domains · here since 9/13/2026
Domain On this IP since
zwinnapanda.pl 9/17/2026
zt888gname.asia 9/17/2026
zs59276.com 9/17/2026
zruvgeduyw.shop 9/13/2026
zqgayq.asia 10/13/2026
zorototobonus20k.shop 9/21/2026
zolfara.ir 9/19/2026
zoe-veritas.com 9/14/2026
zielonyganek.pl 9/16/2026
zhuoyuketang.com 9/18/2026
zhuangabc.com 9/23/2026
zhoudongmin.cn 10/21/2026
and 1,092 more
2606:4700:3030::6815:3833 1,104 domains · here since 9/13/2026
Domain On this IP since
zwinnapanda.pl 9/17/2026
zt888gname.asia 9/17/2026
zs59276.com 9/17/2026
zruvgeduyw.shop 9/13/2026
zqgayq.asia 10/13/2026
zorototobonus20k.shop 9/21/2026
zolfara.ir 9/19/2026
zoe-veritas.com 9/14/2026
zielonyganek.pl 9/16/2026
zhuoyuketang.com 9/18/2026
zhuangabc.com 9/23/2026
zhoudongmin.cn 10/21/2026
and 1,091 more
2606:4700:3032::ac43:b1fd 1,104 domains · here since 9/13/2026
Domain On this IP since
zwinnapanda.pl 9/17/2026
zt888gname.asia 9/17/2026
zs59276.com 9/17/2026
zruvgeduyw.shop 9/13/2026
zqgayq.asia 10/13/2026
zorototobonus20k.shop 9/21/2026
zolfara.ir 9/19/2026
zoe-veritas.com 9/14/2026
zielonyganek.pl 9/16/2026
zhuoyuketang.com 9/18/2026
zhuangabc.com 9/23/2026
zhoudongmin.cn 10/21/2026
and 1,091 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.