Berkshire Hathaway
S&P 500 constituent (BRK.B)
Web presence
Primary domain: berkshirehathaway.com.
0 subdomains observed via Certificate Transparency and direct crawl.
/robots.txt before it fetches anything, and treats an
unreadable one as a refusal rather than as permission. This site's CDN answers that request
with an error, so we cannot read what it does and does not allow — and we do not guess.
The infrastructure facts on this page come from DNS, Certificate Transparency and public
registries, none of which involve fetching the site itself.
How our crawler works.
| Hostname | Source | First seen |
|---|---|---|
| No subdomains observed yet. | ||
Infrastructure
No hosting provider identified yet.
Mail: berkshirehathaway-com.mail.protection.outlook.com. SPF present. DMARC policy: reject. Nameservers: ns10.worldnic.com, ns9.worldnic.com.
Registered via Network Solutions, LLC. Registered 1996-09-06. Expires 2031-09-05.
Digital sovereignty
0/5 — categories confirmed not tied to a US-controlled company, out of DNS, registrar, TLS certificate, host and mail. Ultimate ownership, not the jurisdiction of the specific entity observed: a subsidiary like Google Ireland still counts as American. See the full cross-index comparison.
US DNS · US Registrar · – TLS certificate · – Primary host · US Inbound mail
DNS: Network Solutions. Registrar: Network Solutions. Inbound mail: Microsoft 365.
Vendor footprint
Third-party vendors identified from this company's own published DNS —
apex TXT domain-verification tokens and SPF include: mechanisms. See the
full vendor footprint comparison.
Microsoft 365
Corporate record
No Companies House match on record — likely incorporated outside the UK.
Public engineering footprint
No public GitHub organisation identified.