Rank #8,391Updated November 10, 2026
codesandbox.io
CodeSandbox: Instant Cloud Development Environments
The site runs on Next.js, React, Cloudflare Web Analytics and 3 other technologies. Its email security grade is F. Its SSL certificate is issued by Google Trust Services and is valid for 89 more days.
- Domain age
- —
- Technologies
- 6
- Email security
- F
- SSL days left
- 89
DNS records
| Type | Value | TTL |
|---|---|---|
| A | 104.18.43.9 | 6 |
| A | 172.64.144.247 | 6 |
| MX | aspmx.l.google.com 1 | 300 |
| MX | alt3.aspmx.l.google.com 10 | 300 |
| MX | alt4.aspmx.l.google.com 10 | 300 |
| MX | alt1.aspmx.l.google.com 5 | 300 |
| MX | alt2.aspmx.l.google.com 5 | 300 |
| NS | adel.ns.cloudflare.com | 86400 |
| NS | greg.ns.cloudflare.com | 86400 |
| TXT | F324B508E9 | 300 |
| TXT | google-site-verification=HleifaPPjTRtPQdvU3CPX_v-ILWa7hrmpWS8E5vRDIw | 300 |
| TXT | google-site-verification=iRJ8V6RAGqoNfFwiuPPdHkg_t4lLooctR2kaqzr6xIw | 300 |
| TXT | v=spf1 include:mailgun.org include:_spf.google.com ~all | 300 |
| AAAA | 2a06:98c1:3105::ac40:90f7 | 300 |
| AAAA | 2a06:98c1:3106::6812:2b09 | 300 |
Technology stack
Analytics
CDN
Hosting
Programming language
SSL certificate
| Valid | Valid |
|---|---|
| Issuer | US, WE1, Google Trust Services |
| Expires | February 7, 2027 |
| Days remaining | 89 |
| Protocol | TLSv1.3 |
| Names | codesandbox.io, *.codesandbox.io, *.sse.codesandbox.io, sse.codesandbox.io |
Email security
FScore 49/100 across SPF, DMARC, DKIM, MTA-STS and BIMI.
- warnDMARC applies its policy to only 10% of failing mail.
- warnNo DKIM key found at common selectors (google, selector1, selector2, default, k1, k2, s1, s2, ...). DKIM may still use a custom selector we cannot guess.
- warnNo MTA-STS: mail sent to you can be downgraded to an unencrypted connection.
- warnNo TLS-RPT record, so you won't hear about failed encrypted deliveries.
- warnNo BIMI record (optional: shows your logo next to your emails in supporting inboxes).
- goodSPF record found.
- goodSPF ends with ~all: servers you have not listed are marked as suspicious (soft fail).
- goodDMARC policy is quarantine: failing mail goes to spam. Move to p=reject for full protection.
- goodDMARC aggregate reports are sent to mailto:[email protected], mailto:[email protected].
- good5 MX record(s) found. Mail is handled by Google Workspace.
Homepage metadata
| Title | CodeSandbox: Instant Cloud Development Environments |
|---|---|
| Description | CodeSandbox is a cloud development platform that empowers developers to code, collaborate and ship projects of any size from any device in record time. |
| Language | en |
| Indexable | Yes |
| Word count | 528 |
About codesandbox.io
What technology does codesandbox.io use?
We detected 6 technologies on codesandbox.io, including Cloudflare Web Analytics, Cloudflare, Google Cloud, Next.js, React, Node.js.
Does codesandbox.io protect its email with SPF and DMARC?
codesandbox.io scores 49/100 (grade F) for email security. DMARC applies its policy to only 10% of failing mail. No DKIM key found at common selectors (google, selector1, selector2, default, k1, k2, s1, s2, ...). DKIM may still use a custom selector we cannot guess.
What are the name servers of codesandbox.io?
codesandbox.io uses adel.ns.cloudflare.com, greg.ns.cloudflare.com.