21cn
is
▲ UP
100.0% confident
Last check: 2 weeks ago
·
Jul 21, 2026 17:33 UTC
MTI Verification Status
Live status from our automated multi-method verification engine.
| Overall Status | UP |
|---|---|
| Last Checked | Sat, Jul 4, 2026 4:08 AM |
| Confidence | 100.0% |
| Checks Passed | 2 |
| Checks Failed | 1 |
| Methods Run | 3 |
| SSL Grade | B |
| SSL Expires | 146 days |
Check Results
2
Checks Passed
1
Checks Failed
3
Methods Run
Latest Method Results
HTTP Check
FAILED
HTTP 412 in 3240ms
3240ms
SSL/TLS Handshake
PASSED
SSL OK (B) in 425ms
B · 146d
IP: 114.217.37.13
425ms
TCP Connection
PASSED
TCP 21cn.com:443 OK in 211ms
IP: 114.217.37.13
211ms
Historical Checks
What is 21cn Organization?
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MTI Verification Details
| Method | Status | Details |
|---|---|---|
curl_http |
FAILED | HTTP 412 in 3240ms |
tcp_connect |
PASSED | TCP 21cn.com:443 OK in 211ms |
ssl_handshake |
PASSED | SSL OK (B) in 425ms |
Company Details
| Company | 21cn |
|---|---|
| Domain | 21cn.com |
| Type | Unknown |
| Monitored | Not Monitored |
Recent Uptime Checks
| Check Time | Status | Response | Method | Output |
|---|---|---|---|---|
| Jun 08 06:40:39 | DOWN 412 | 3504ms | curl_http | HTTP 412 in 3504ms |
| Jun 08 06:40:40 | UP | 478ms | ssl_handshake | SSL OK (B) in 478ms |
| Jun 08 06:40:40 | UP | 225ms | tcp_connect | TCP 21cn.com:443 OK in 225ms |
| Jun 08 06:40:41 | UP | N/A | verification_summary | N/A |
| Jun 23 21:53:53 | DOWN 412 | 3662ms | curl_http | HTTP 412 in 3662ms |
| Jun 23 21:53:54 | UP | 223ms | tcp_connect | TCP 21cn.com:443 OK in 223ms |
| Jun 23 21:53:55 | UP | 472ms | ssl_handshake | SSL OK (B) in 472ms |
| Jun 23 21:53:56 | UP | N/A | verification_summary | N/A |
| Jul 04 04:08:06 | DOWN 412 | 3240ms | curl_http | HTTP 412 in 3240ms |
| Jul 04 04:08:06 | UP | 211ms | tcp_connect | TCP 21cn.com:443 OK in 211ms |
| Jul 04 04:08:07 | UP | 425ms | ssl_handshake | SSL OK (B) in 425ms |
| Jul 04 04:08:08 | UP | N/A | verification_summary | N/A |
Verticals Health
| Signal | Status | UP | DOWN | UNC | UNK | Total | |
|---|---|---|---|---|---|---|---|
| NTP ntp_servers | NONE | 0 | 0 | 0 | 0 | 0 | |
| DNS dns_servers | NONE | 0 | 0 | 0 | 0 | 0 | |
| VPN vpn_servers | NONE | 0 | 0 | 0 | 0 | 0 | |
| SMTP smtp_servers | NONE | 0 | 0 | 0 | 0 | 0 | |
| HTTP http_servers | NONE | 0 | 0 | 0 | 0 | 0 | |
| SSH ssh_servers | NONE | 0 | 0 | 0 | 0 | 0 | |
| WHOIS whois_lookups | NONE | 0 | 0 | 0 | 0 | 0 | |
| CT ct_certificates | NONE | 0 | 0 | 0 | 0 | 0 | |
| Tor tor_relays | N/A | 0 | 0 | 0 | 0 | 0 | |
| Overall | NO DATA | 0 | 0 | 0 | 0 | 0 | |
NTP
ntp_servers
NONE
0UP
0DN
0UN
0UK
0Σ
View NTP
DNS
dns_servers
NONE
0UP
0DN
0UN
0UK
0Σ
View DNS
VPN
vpn_servers
NONE
0UP
0DN
0UN
0UK
0Σ
View VPN
SMTP
smtp_servers
NONE
0UP
0DN
0UN
0UK
0Σ
View SMTP
HTTP
http_servers
NONE
0UP
0DN
0UN
0UK
0Σ
View HTTP
SSH
ssh_servers
NONE
0UP
0DN
0UN
0UK
0Σ
View SSH
WHOIS
whois_lookups
NONE
0UP
0DN
0UN
0UK
0Σ
View WHOIS
CT
ct_certificates
NONE
0UP
0DN
0UN
0UK
0Σ
View CT
Tor
tor_relays
N/A
0UP
0DN
0UN
0UK
0Σ
View Tor
Overall
all 9 verticals
NO DATA
0UP
0DN
0UN
0UK
0Σ
UNCERTAIN = data source temporarily unavailable. DOWN = target unreachable.