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385.6 M

Domains known to webXtrend

9.9 M

New domains in the last 30 days

62.8 M

Social media profiles detected

professorlinux.com

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

It answers on both IPv4 and IPv6, with MX records for mail.

Its busiest IP address is shared with 924 other domains.

The most recent crawl returned the page title “professorlinux.com | 525: SSL handshake failed” and 7,078 bytes of HTML.

Domain properties

Property Value Explanation
Top-level domain .com Statistics for all domains we know under this TLD.
Has website no 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 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 no certificate Shows whether the domain has a valid SSL certificate.
Redirects 0 Number of domains that redirect to this domain.
Reverse IP 3,695 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": "professorlinux.com"}'

Create a free account Read the API docs

Detected social media networks

No social networks found on this website.

Similar websites

We found no website on this domain, so there is nothing to compare.

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 7/19/2026
Valid to 10/17/2026
Time until expiry expired 7 days ago

Last successful crawl

Title professorlinux.com | 525: SSL handshake failed
Description (not set)
Content-Length 7,078 bytes

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

DNS history

IPv4 address First seen
104.21.35.4 3/24/2026
172.67.210.113 3/24/2026
185.230.63.107 12/11/2023
185.230.63.171 12/11/2023
185.230.63.186 12/11/2023
IPv6 address First seen
2606:4700:3032:0:0:0:6815:2304 7/23/2026
2606:4700:3032:0:0:0:ac43:d271 7/23/2026
2606:4700:3032:0:0:0:ac43:d271 3/24/2026
2606:4700:3035:0:0:0:6815:2304 3/24/2026
Mail server Priority First seen
aspmx.l.google.com 10 1/1/2024
alt1.aspmx.l.google.com 20 1/1/2024
alt2.aspmx.l.google.com 30 1/1/2024
alt3.aspmx.l.google.com 40 1/1/2024
alt4.aspmx.l.google.com 50 1/1/2024
Name server First seen
blakely.ns.cloudflare.com 3/24/2026
kobe.ns.cloudflare.com 3/24/2026
ns4.wixdns.net 12/11/2023
ns5.wixdns.net 12/11/2023

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

2606:4700:3032::ac43:d271 923 domains · here since 10/20/2026
Domain On this IP since
zvot.top 9/13/2026
zvezdatech.com 9/21/2026
zlpe.cn 9/17/2026
zk9li.com 9/17/2026
zillchallenge.com 9/20/2026
zigaib2b.co 10/19/2026
zifa.org 9/20/2026
zerkalo-leonbets-c0lad.top 9/15/2026
zeneiq.info 9/27/2026
zdt.pw 9/20/2026
zaplanujwesele.app 9/23/2026
yzf600r.com 10/21/2026
and 910 more
2606:4700:3032::6815:2304 922 domains · here since 10/20/2026
Domain On this IP since
zvot.top 9/13/2026
zvezdatech.com 9/21/2026
zlpe.cn 9/17/2026
zk9li.com 9/17/2026
zillchallenge.com 9/20/2026
zigaib2b.co 10/19/2026
zifa.org 9/20/2026
zerkalo-leonbets-c0lad.top 9/15/2026
zeneiq.info 9/27/2026
zdt.pw 9/20/2026
zaplanujwesele.app 9/23/2026
yzf600r.com 10/21/2026
and 909 more
104.21.35.4 925 domains · here since 9/14/2026
Domain On this IP since
zvot.top 9/13/2026
zvezdatech.com 9/21/2026
zlpe.cn 9/17/2026
zk9li.com 9/17/2026
zillchallenge.com 9/20/2026
zigaib2b.co 10/19/2026
zifa.org 9/20/2026
zerkalo-leonbets-c0lad.top 9/15/2026
zeneiq.info 9/27/2026
zdt.pw 9/20/2026
zaplanujwesele.app 9/23/2026
yzf600r.com 10/21/2026
and 912 more
172.67.210.113 925 domains · here since 9/14/2026
Domain On this IP since
zvot.top 9/13/2026
zvezdatech.com 9/21/2026
zlpe.cn 9/17/2026
zk9li.com 9/17/2026
zillchallenge.com 9/20/2026
zigaib2b.co 10/19/2026
zifa.org 9/20/2026
zerkalo-leonbets-c0lad.top 9/15/2026
zeneiq.info 9/27/2026
zdt.pw 9/20/2026
zaplanujwesele.app 9/23/2026
yzf600r.com 10/21/2026
and 912 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.