indexo.dev

21vianet.com

.com crawl dns

First seen 2026-05-10 · Last seen 2026-05-16 · pending crawled 2026-05-16

CN · 124.251.110.133 · AS4835 China Telecom Group

Reputation 67/100 wrong cert no dmarc policy

ssl error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: Hostname mismatch, certificate is not valid for '21vianet.com'. (_ssl.c:1000)

Registration

Registrar
Alibaba Cloud Computing (Beijing) Co., Ltd.
Created
2000-04-13
Expires
2028-04-13 694 days left
Updated
2025-04-16
Name servers
  • vip3.alidns.com
  • vip4.alidns.com

DNS records live

NS
  • vip3.alidns.com
  • vip4.alidns.com
MX
  • 20 bmg03.21vianet.com
  • 5 bmg01.21vianet.com
TXT
  • MS=DE141DF5AF5E2413AEB4F4E5C914E49E1F37079F
  • MS=ms91280327

Email authentication weak

SPF
v=spf1 include:spf.protection.partner.outlook.cn include:spf.21vianet.com include:smtp.core.chinacloudapi.cn include:sparkpostmail.com include:_spf-ssg-a.microsoft.com -all
strict (-all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current) wrong cert

R13
from 2026-01-26 to 2026-04-26
Expired 24 days ago

Full certificate history on crt.sh ↗

Linked from (2)