smart-teach.cn
Protected
Cloudflare feishu.cn
DNS, hosting, email and name analysis are live. Registration data, the home-page probe, the archive lookup and the other-TLD check are being fetched in the background; this page refreshes itself in a few seconds.
Registration
Fetching the registry record…
DNS
| Type | Value |
|---|---|
| NS | jakub.ns.cloudflare.com · meera.ns.cloudflare.com |
| A | 104.21.15.57 |
| A | 172.67.161.187 |
| AAAA | 2606:4700:3032::ac43:a1bb |
| AAAA | 2606:4700:3034::6815:f39 |
| MX | 1 mx1.feishu.cn |
| MX | 5 mx2.feishu.cn |
| MX | 10 mx3.feishu.cn |
| TXT | verification-code-site-App_feishu=q0LlDlzifRrgcs8CQlcT |
| TXT | v=spf1 +include:_netblocks.m.feishu.cn -all |
| SOA | jakub.ns.cloudflare.com dns.pysio.online serial 2417324970 |
Certificates
- First certificate seen
- 2026-10-13 21:58 UTC since dot.bi started watching
- Last certificate seen
- 2026-10-13 21:58 UTC
- Certificates observed
- 2
- Issuers
- Google Trust Services
Hosting
- IP
- 104.21.15.57
- Network
- AS13335 · CLOUDFLARENET - Cloudflare, Inc., US
- Provider
- Cloudflare
- Country
- US (network registration, not server location)
- CDN
- none detected
- IPv6
- yes
Web
Probing the home page…
Protected Mail is authenticated and spoofed mail is quarantined.
- Provider
- feishu.cn
- SPF
- present all: fail
- DMARC
- p=quarantine no reports
- DKIM
- not found common selectors only
Age
- First capture
- looking up…
- Years archived
- —
- Registry created
- —
- In dot.bi since
- 2026-10-13 · Certificate Transparency
Name analysis
Same name, other TLDs
Checking the same name on other TLDs…
History observed by dot.bi
First observed by dot.bi · source: ct