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THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.2

mail.cstroy.ru · 188.75.3.43:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=*.cstroy.ru
Issuer
C=BE O=GlobalSign nv-sa CN=GlobalSign GCC R6 AlphaSSL CA 2025
Valid from
2026-07-24T05:59:10+00:00
Expires
2027-02-08T05:59:10+00:00
Days remaining
118
Serial (hex)
455E029BE6FB3ABD477B28F2
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.cstroy.ru, DNS:cstroy.ru

SHA-256 fingerprint

54:68:E7:29:D4:15:04:F4:55:C5:16:A0:8E:FC:55:70:7B:6B:BC:11:3A:3F:0B:2A:19:63:A2:50:B7:43:ED:3C
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
authorityInfoAccess
CA Issuers - URI:http://secure.globalsign.com/cacert/gsgccr6alphasslca2025.crt OCSP - URI:http://ocsp.globalsign.com/gsgccr6alphasslca2025
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.4146.10.1.3 CPS: https://www.globalsign.com/repository/
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/gsgccr6alphasslca2025.crl
subjectAltName
DNS:*.cstroy.ru, DNS:cstroy.ru
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
authorityKeyIdentifier
C5:B4:93:8F:6F:2B:DC:1E:48:BF:B7:10:30:85:CE:D1:B2:BB:48:2D
subjectKeyIdentifier
2A:2E:CE:35:6A:1C:9F:15:03:F0:B7:36:07:81:0E:8A:EB:B9:4A:95
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Jul 24 05:59:14.609 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:2B:8E:1F:01:42:29:69:82:18:8A:05:AD: 40:50:E9:7A:E5:51:81:8C:59:33:FD:38:19:08:13:15: DA:93:14:7D:02:21:00:E8:29:6F:E3:1D:E2:AB:E6:E4: 1D:0B:CC:C3:67:BE:19:F2:B9:01:3C:80:33:08:7B:0A: 49:38:08:68:22:90:CD Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Jul 24 05:59:14.432 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:8B:63:F3:87:06:06:C6:54:31:A1:16: 6A:FD:3E:C1:E5:67:EC:0B:74:09:18:E5:DC:28:0C:3D: 05:1F:47:F7:FB:02:21:00:AE:2D:8F:22:F4:FD:43:CD: 92:A2:8E:33:14:12:2B:AB:96:08:C7:85:77:42:10:D2: 22:88:23:9A:C5:B9:BD:17 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Jul 24 05:59:14.433 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:9B:2C:2D:5A:83:39:15:FE:FE:46:7D: 4C:E8:F9:11:08:9B:64:60:6F:C5:1F:86:42:94:A2:69: D3:F4:D8:58:4F:02:21:00:DB:4D:EC:DF:51:69:93:A6: 9E:74:07:24:04:CF:72:3E:D9:10:FB:89:41:71:4A:98: 7C:53:96:BC:71:A2:DB:A0
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-13T01:06:29+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=BE O=GlobalSign nv-sa CN=GlobalSign GCC R6 AlphaSSL CA 2025
Issuer
OU=GlobalSign Root CA - R6 O=GlobalSign CN=GlobalSign
Valid from
2025-05-21T02:36:52+00:00
Expires
2027-05-21T00:00:00+00:00
Days remaining
219
Serial (hex)
837D4EB89E912FE72CAD3BC7692DDC20
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

A8:83:55:92:31:F8:38:8D:AF:35:CE:41:C8:10:10:40:AE:8F:D9:B6:56:43:42:47:B9:47:5A:F5:92:CC:08:CA
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
C5:B4:93:8F:6F:2B:DC:1E:48:BF:B7:10:30:85:CE:D1:B2:BB:48:2D
authorityKeyIdentifier
AE:6C:05:A3:93:13:E2:A2:E7:E2:D7:1C:D6:C7:F0:7F:C8:67:53:A0
authorityInfoAccess
OCSP - URI:http://ocsp2.globalsign.com/rootr6 CA Issuers - URI:http://secure.globalsign.com/cacert/root-r6.crt
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/root-r6.crl
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.4146.10.1.3
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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