443/tcp
TLS
first 2026-09-23 · last 2026-09-23
- TLS
- TLSv1.2
- Certificate for
- *.dingtalk.com, dingtalk.com
- Issued by
- GlobalSign GCC R46 OV TLS CA 2025
- Valid
- 2026-09-07 → 2027-03-25
Raw response
HTTP/1.1 400 Bad Request Server: DingTalk/1.0.0 Date: Wed, 23 Sep 2026 14:23:41 GMT Content-Type: text/html Content-Length: 332 Connection: close <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html> <head><title>400 The plain HTTP request was sent to HTTPS port</title></head> <body> <center><h1>400 Bad Request</h1></center> <center>The plain HTTP request was sent to HTTPS port</center> <hr/>Powered by DingTalk/1.0.0<hr><center>tengine</center> </body> </html>