8591
is
▲ UP
100.0% confident
Last check: 1 month ago
·
Jul 18, 2026 20:20 UTC
MTI Verification Status
Live status from our automated multi-method verification engine.
| Overall Status | UP |
|---|---|
| Last Checked | Tue, Jun 16, 2026 5:05 PM |
| Confidence | 100.0% |
| Checks Passed | 2 |
| Checks Failed | 1 |
| Methods Run | 3 |
| SSL Grade | B |
| SSL Expires | 120 days |
Check Results
2
Checks Passed
1
Checks Failed
3
Methods Run
Latest Method Results
HTTP Check
FAILED
HTTP 403 in 2296ms
2296ms
TCP Connection
PASSED
TCP 8591.com.tw:443 OK in 324ms
IP: 203.69.66.10
324ms
SSL/TLS Handshake
PASSED
SSL OK (B) in 735ms
B · 120d
IP: 203.69.66.10
735ms
Historical Checks
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MTI Verification Details
| Method | Status | Details |
|---|---|---|
curl_http |
FAILED | HTTP 403 in 2296ms |
tcp_connect |
PASSED | TCP 8591.com.tw:443 OK in 324ms |
ssl_handshake |
PASSED | SSL OK (B) in 735ms |
Company Details
| Company | 8591 |
|---|---|
| Domain | 8591.com.tw |
| Type | Unknown |
| Monitored | Not Monitored |
Recent Uptime Checks
| Check Time | Status | Response | Method | Output |
|---|---|---|---|---|
| Jun 08 05:07:27 | DOWN 403 | 1984ms | curl_http | HTTP 403 in 1984ms |
| Jun 08 05:07:28 | UP | 296ms | tcp_connect | TCP 8591.com.tw:443 OK in 296ms |
| Jun 08 05:07:29 | UP | 747ms | ssl_handshake | SSL OK (B) in 747ms |
| Jun 08 05:07:29 | UP | N/A | verification_summary | N/A |
| Jun 15 03:08:58 | DOWN 403 | 2121ms | curl_http | HTTP 403 in 2121ms |
| Jun 15 03:08:59 | UP | 281ms | tcp_connect | TCP 8591.com.tw:443 OK in 281ms |
| Jun 15 03:09:00 | UP | 756ms | ssl_handshake | SSL OK (B) in 756ms |
| Jun 15 03:09:03 | UP | N/A | verification_summary | N/A |
| Jun 16 17:05:05 | DOWN 403 | 2296ms | curl_http | HTTP 403 in 2296ms |
| Jun 16 17:05:05 | UP | 324ms | tcp_connect | TCP 8591.com.tw:443 OK in 324ms |
| Jun 16 17:05:06 | UP | 735ms | ssl_handshake | SSL OK (B) in 735ms |
| Jun 16 17:05:06 | 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.