81
is
▲ UP
100.0% confident
Last check: 1 month ago
·
Jul 18, 2026 22:29 UTC
MTI Verification Status
Live status from our automated multi-method verification engine.
| Overall Status | UP |
|---|---|
| Last Checked | Tue, Jun 16, 2026 5:04 PM |
| Confidence | 100.0% |
| Checks Passed | 2 |
| Checks Failed | 0 |
| Methods Run | 2 |
Check Results
2
Checks Passed
0
Checks Failed
2
Methods Run
Latest Method Results
HTTP Check
PASSED
HTTP 200 in 2534ms
2534ms
TCP Connection
PASSED
TCP 81.cn:443 OK in 314ms
IP: 222.94.225.121
314ms
SSL/TLS Handshake
PASSED
SSL OK (B) in 1141ms
B · 284d
IP: 222.94.225.121
1141ms
Historical Checks
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MTI Verification Details
| Method | Status | Details |
|---|---|---|
curl_http |
PASSED | HTTP 200 in 2534ms |
tcp_connect |
PASSED | TCP 81.cn:443 OK in 314ms |
Company Details
| Company | 81 |
|---|---|
| Domain | 81.cn |
| Type | Unknown |
| Monitored | Not Monitored |
Recent Uptime Checks
| Check Time | Status | Response | Method | Output |
|---|---|---|---|---|
| Jun 08 07:20:20 | DOWN | 1272ms | curl_http | Connection failed: cURL error 7: Couldn't connect... |
| Jun 08 07:20:20 | UP | 298ms | tcp_connect | TCP 81.cn:443 OK in 298ms |
| Jun 08 07:20:21 | UP | 1141ms | ssl_handshake | SSL OK (B) in 1141ms |
| Jun 08 07:20:21 | UP | N/A | verification_summary | N/A |
| Jun 15 03:08:21 | UP 200 | 3948ms | curl_http | HTTP 200 in 3948ms |
| Jun 15 03:08:22 | UP | 224ms | tcp_connect | TCP 81.cn:443 OK in 224ms |
| Jun 15 03:08:22 | UP | N/A | verification_summary | N/A |
| Jun 16 17:04:37 | UP 200 | 2534ms | curl_http | HTTP 200 in 2534ms |
| Jun 16 17:04:38 | UP | 314ms | tcp_connect | TCP 81.cn:443 OK in 314ms |
| Jun 16 17:04:38 | 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.