What powers postoffice.net?
Last seen Sep 2026 · 17 technologies across 12 categories
CDN
Font scripts
JavaScript frameworks
JavaScript libraries
Operating systems
Windows Server
since Aug 2018
PaaS
Amazon Web Services
since Aug 2022
Programming languages
Security
HSTS
since Sep 2022
Web frameworks
Web server extensions
Web servers
Apache HTTP Server
since Aug 2018
Webmail
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Oct 2026 robots.txt appeared
- Oct 2026 * added to robots.txt
- Sep 2026 * removed from robots.txt
- Sep 2026 robots.txt removed
AI Crawlers
No AI crawlers blocked
Audience
- 88% desktop
- 12% phone
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.84 / 10 · ranked #262,247 of all domains
98 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.7 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 2300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- Weight: 1.0 MB · 12 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Registered Nov 1997 (28 years) via Network Solutions, LLC, renews Nov 2027
- DNS: usa.net
- Email: no MX record returned
- SSL: DigiCert, RSA 4096, expires Apr 2027
- Common Crawl link graph: rank 1,199,905, 17 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| clicktime.cloud.postoffice.net | 9 |
| cloud.postoffice.net | 8 |
| exchange.postoffice.net | 4 |
| owa.postoffice.net | 4 |
| webmail.postoffice.net | 2 |