DNS
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

TLSv1.3

smtp.omkc.ru · 217.25.208.5:443

Verified

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

Subject
CN=*.omkc.ru
Issuer
C=BE O=GlobalSign nv-sa CN=GlobalSign GCC R3 DV TLS CA 2020
Valid from
2025-12-05T05:59:44+00:00
Expires
2027-01-06T05:59:43+00:00
Days remaining
83
Serial (hex)
228BBCDF781E80A12E55D485
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.omkc.ru, DNS:omkc.ru

SHA-256 fingerprint

30:18:46:66:52:8C:04:AD:98:05:74:65:1F:78:93:F6:F3:25:B7:A9:3D:D8:8E:96:C3:9B:46:7B:82:88:43:13
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
authorityInfoAccess
CA Issuers - URI:http://secure.globalsign.com/cacert/gsgccr3dvtlsca2020.crt OCSP - URI:http://ocsp.globalsign.com/gsgccr3dvtlsca2020
certificatePolicies
Policy: 1.3.6.1.4.1.4146.1.10 CPS: https://www.globalsign.com/repository/ Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/gsgccr3dvtlsca2020.crl
subjectAltName
DNS:*.omkc.ru, DNS:omkc.ru
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
authorityKeyIdentifier
0D:98:C0:73:7F:AB:BD:BD:D9:47:4B:49:AD:0A:4A:0C:AC:3E:C7:7C
subjectKeyIdentifier
BC:77:64:65:AA:F6:26:4C:6C:C3:55:53:BB:12:BA:4B:9E:5B:AB:66
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 : Dec 5 05:59:47.967 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:A1:F2:3A:DF:36:CF:C8:9F:20:52:F1: 79:F2:65:7A:42:50:E5:67:35:7D:BB:F6:06:8F:47:DE: B1:33:6A:D9:A6:02:20:59:4B:51:2E:64:A7:8D:B0:AA: 0A:5F:78:A6:A3:3C:3D:59:5C:D6:86:D7:47:CC:A0:26: 99:4E:09:F2:39:88:83 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 : Dec 5 05:59:47.297 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:C6:CF:9C:D6:12:A8:CC:E5:84:83:A6: BF:85:F0:20:0B:14:58:C9:6D:6F:4E:17:0B:4D:14:E1: 7E:62:B6:C3:55:02:21:00:C4:A7:22:E3:E4:52:B4:26: 2D:07:5A:B1:FD:28:AE:CA:20:A6:39:2F:DE:2E:5A:BC: A4:88:12:64:40:F8:52:3B 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 : Dec 5 05:59:47.425 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:D9:9B:D1:8B:A2:DF:54:60:87:2A:44: E3:A5:76:A9:18:D8:42:CC:31:B5:43:61:9B:AE:CB:A7: 58:F2:B2:0F:59:02:21:00:98:F0:6D:CA:1B:E0:5A:21: A6:DA:38:4F:26:4E:92:0E:9D:97:30:30:56:53:43:B3: 44:3A:5B:8F:9A:AE:B8:3B
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-14T13:28:29+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=BE O=GlobalSign nv-sa CN=GlobalSign GCC R3 DV TLS CA 2020
Issuer
OU=GlobalSign Root CA - R3 O=GlobalSign CN=GlobalSign
Valid from
2020-07-28T00:00:00+00:00
Expires
2029-03-18T00:00:00+00:00
Days remaining
885
Serial (hex)
77BD0E0742D5D9E9D049D774D02A6F9A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

76:25:38:43:95:09:C4:11:C4:37:D3:C5:67:56:3E:13:78:67:12:81:FC:4A:14:64:AD:D0:31:87:08:43:67:6E
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
0D:98:C0:73:7F:AB:BD:BD:D9:47:4B:49:AD:0A:4A:0C:AC:3E:C7:7C
authorityKeyIdentifier
8F:F0:4B:7F:A8:2E:45:24:AE:4D:50:FA:63:9A:8B:DE:E2:DD:1B:BC
authorityInfoAccess
OCSP - URI:http://ocsp2.globalsign.com/rootr3 CA Issuers - URI:http://secure.globalsign.com/cacert/root-r3.crt
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/root-r3.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.globalsign.com/repository/
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
OU=GlobalSign Root CA - R3 O=GlobalSign CN=GlobalSign
Issuer
OU=GlobalSign Root CA - R3 O=GlobalSign CN=GlobalSign
Valid from
2009-03-18T10:00:00+00:00
Expires
2029-03-18T10:00:00+00:00
Days remaining
885
Serial (hex)
04000000000121585308A2
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CB:B5:22:D7:B7:F1:27:AD:6A:01:13:86:5B:DF:1C:D4:10:2E:7D:07:59:AF:63:5A:7C:F4:72:0D:C9:63:C5:3B
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
subjectKeyIdentifier
8F:F0:4B:7F:A8:2E:45:24:AE:4D:50:FA:63:9A:8B:DE:E2:DD:1B:BC
-----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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