Registered
- openapi.
casa - Nov 8, 2026 — 2 days old
- openai.
com - Jan 19, 2007 — 19 years old
Compare two sites
Paste the link you were sent and the brand it claims to be.
AboutUs puts the two domains side by side — registration, DNS, HTTPS, email authentication, and Authority/Safety — so you can see what's actually different before you click through.
What's different
- Registered 2 days old vs 19 years old.
- Different registrar — openapi.casa: NameCheap, Inc.; openai.com: MarkMonitor Inc..
- Different nameservers — openapi.casa uses Namecheap; openai.com uses an unidentified provider.
Side-by-side facts for openapi.casa and openai.com
Registrar
- openapi.
casa - NameCheap, Inc.
- openai.
com - MarkMonitor Inc.
Nameservers / DNS provider
- openapi.
casa - dns1.registrar-servers.com, dns2.registrar-servers.com (Namecheap)
- openai.
com - ns2-02.azure-dns.net, ns3-02.azure-dns.org
HTTPS / certificate
- openapi.
casa - The website responded over HTTPS. Certificate issued by Let's Encrypt (expires Feb 6, 2027).
- openai.
com - The site's own edge security (Cloudflare) intercepted this automated check with a bot-protection challenge before it reached the site itself. This is not evidence about the site's HTTPS setup — AboutUs could not complete this check. Certificate issued by Let's Encrypt (expires Feb 4, 2027).
Email authentication
- openapi.
casa - SPF: record valid · DMARC: not found in saved lookup.
- openai.
com - SPF: record valid · DMARC: reject requested (p=reject).
Authority / Safety
- openapi.
casa - Authority: not enough signals yet. Safety: Not enough signals yet.
- openai.
com - Authority 93/100. Safety 90/100 (Clear).
Verified-owner status
- openapi.
casa - Claimable
- openai.
com - Claimable
AboutUs on record since
- openapi.
casa - Not retrieved yet
- openai.
com - Since 2007
| Fact | openapi. | openai. |
|---|---|---|
| Registered | Nov 8, 2026 — 2 days old | Jan 19, 2007 — 19 years old |
| Registrar | NameCheap, Inc. | MarkMonitor Inc. |
| Nameservers / DNS provider | dns1.registrar-servers.com, dns2.registrar-servers.com (Namecheap) | ns2-02.azure-dns.net, ns3-02.azure-dns.org |
| HTTPS / certificate | The website responded over HTTPS. Certificate issued by Let's Encrypt (expires Feb 6, 2027). | The site's own edge security (Cloudflare) intercepted this automated check with a bot-protection challenge before it reached the site itself. This is not evidence about the site's HTTPS setup — AboutUs could not complete this check. Certificate issued by Let's Encrypt (expires Feb 4, 2027). |
| Email authentication | SPF: record valid · DMARC: not found in saved lookup. | SPF: record valid · DMARC: reject requested (p=reject). |
| Authority / Safety | Authority: not enough signals yet. Safety: Not enough signals yet. | Authority 93/100. Safety 90/100 (Clear). |
| Verified-owner status | Claimable | Claimable |
| AboutUs on record since | Not retrieved yet | Since 2007 |
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