postmasterplus.com

postmasterplus.com serves a website of its own over HTTPS. It answers on IPv4 only, with a valid TLS certificate.

1,228,290 other domains share an IP address with it.

The most recent crawl returned the page title “Postmaster+ | Email Verification & Deliverability Monitoring” and 52,484 bytes of HTML.

Domain properties

Property	Value	Explanation
Top-level domain	.com	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	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	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	1,228,290	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": "postmasterplus.com"}'

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	8/27/2026
Valid to	11/25/2026
Time until expiry	40 days

Last successful crawl

Title	Postmaster+ \| Email Verification & Deliverability Monitoring
Description	Protect your sender reputation with real-time email verification, unified deliverability monitoring, and the industry's deepest blocklist detection. Start free today.
Content-Length	52,484 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
185.158.133.1	1/6/2026
3.81.182.53	12/24/2025
54.80.62.205	12/24/2025
3.81.182.53	12/17/2025
34.201.193.83	12/17/2025

Name server	Last updated
ns20.digicertdns.com	12/10/2023
ns21.digicertdns.com	12/10/2023
ns22.digicertdns.com	12/10/2023
ns23.digicertdns.net	12/10/2023
ns24.digicertdns.net	12/10/2023

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

185.158.133.1 1,228,290 domains · here since 9/21/2026

Domain	On this IP since
zzztime.com	9/14/2026
zzzfesta.co.kr	9/14/2026
zzzcycle.dev	9/16/2026
zzzcommerce.nl	9/13/2026
zzzcommerce.com	9/16/2026
zzz.chat	9/22/2026
zzyzx.cx	9/21/2026
zzuma.online	9/13/2026
zzthing.com	9/14/2026
zzthat.com	9/15/2026
zzshare.dev	10/6/2026
zzpwebsitenodig.nl	9/12/2026
and 1,228,277 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!