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384.5 M

Domains known to webXtrend

9.4 M

New domains in the last 30 days

62.8 M

Social media profiles detected

runcastle.dev

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

runcastle.dev 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.

3,860 other domains share an IP address with it.

The most recent crawl returned the page title “runcastle - stop babysitting your coding agents” and 78,865 bytes of HTML.

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 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 3,860 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": "runcastle.dev"}'

Create a free account Read the API docs

Detected social media networks

No social networks found on this website.

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Last SSL certificate

Issuer Google Trust Services
Valid from 9/22/2026
Valid to 12/21/2026
Time until expiry 62 days

Last successful crawl

Title runcastle - stop babysitting your coding agents
Description Talk an idea through once and get back a branch to test drive. runcastle takes a feature through spec, tickets, build and review with Claude Code or Codex, unattended, on your own machine and your own repo.
Content-Length 78,865 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
104.21.78.53 7/13/2026
172.67.216.243 7/13/2026
IPv6 address Last updated
2606:4700:3030:0:0:0:6815:4e35 7/13/2026
2606:4700:3031:0:0:0:ac43:d8f3 7/13/2026
Mail server Priority Last updated
route1.mx.cloudflare.net 12 7/13/2026
route2.mx.cloudflare.net 52 7/13/2026
route3.mx.cloudflare.net 54 7/13/2026
Name server Last updated
anirban.ns.cloudflare.com 7/13/2026
grannbo.ns.cloudflare.com 7/13/2026

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

104.21.78.53 972 domains · here since 9/20/2026
Domain On this IP since
zimipiri.net 9/16/2026
zeytinburnuescortdesire.site 9/28/2026
zenvira.site 10/10/2026
zentorviq.org 9/17/2026
zenthconsumerspoint.xyz 9/22/2026
zazoonag.site 9/18/2026
ysfylrpx.xyz 10/12/2026
youxuanpos.com 9/18/2026
youtube-mp3.cloud 9/22/2026
yourtopics.com 9/19/2026
yojyy.icu 9/19/2026
yobet08.com 10/6/2026
and 959 more
172.67.216.243 972 domains · here since 9/20/2026
Domain On this IP since
zimipiri.net 9/16/2026
zeytinburnuescortdesire.site 9/28/2026
zenvira.site 10/10/2026
zentorviq.org 9/17/2026
zenthconsumerspoint.xyz 9/22/2026
zazoonag.site 9/18/2026
ysfylrpx.xyz 10/12/2026
youxuanpos.com 9/18/2026
youtube-mp3.cloud 9/22/2026
yourtopics.com 9/19/2026
yojyy.icu 9/19/2026
yobet08.com 10/6/2026
and 959 more
2606:4700:3030::6815:4e35 958 domains · here since 9/20/2026
Domain On this IP since
zimipiri.net 9/16/2026
zeytinburnuescortdesire.site 9/28/2026
zenvira.site 10/10/2026
zentorviq.org 9/17/2026
zenthconsumerspoint.xyz 9/22/2026
zazoonag.site 9/18/2026
ysfylrpx.xyz 10/12/2026
youxuanpos.com 9/18/2026
youtube-mp3.cloud 9/22/2026
yourtopics.com 9/19/2026
yojyy.icu 9/19/2026
yobet08.com 10/6/2026
and 945 more
2606:4700:3031::ac43:d8f3 958 domains · here since 9/20/2026
Domain On this IP since
zimipiri.net 9/16/2026
zeytinburnuescortdesire.site 9/28/2026
zenvira.site 10/10/2026
zentorviq.org 9/17/2026
zenthconsumerspoint.xyz 9/22/2026
zazoonag.site 9/18/2026
ysfylrpx.xyz 10/12/2026
youxuanpos.com 9/18/2026
youtube-mp3.cloud 9/22/2026
yourtopics.com 9/19/2026
yojyy.icu 9/19/2026
yobet08.com 10/6/2026
and 945 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.