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

mail.psk-net.ru · 89.208.120.6:443

Verified

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

Subject
CN=mail.psk-net.ru
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-21T13:51:34+00:00
Expires
2027-01-19T13:51:33+00:00
Days remaining
80
Serial (hex)
06B7D9AC156B14F9A1D6C04EA737145DA086
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.health-status.ru, DNS:autoconfig.psk-net.ru, DNS:autodiscover.health-status.ru, DNS:autodiscover.psk-net.ru, DNS:mail.health-status.ru, DNS:mail.psk-net.ru, DNS:smtp.health-status.ru, DNS:webmail.health-status.ru

SHA-256 fingerprint

D4:83:E8:EB:BD:C7:AB:85:25:4E:58:8A:06:63:2E:D0:B2:75:C7:CE:8C:39:BA:DC:E6:3D:4F:D1:EA:F1:51:3B
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
05:DA:EF:63:03:A0:FD:CB:8D:F6:60:D9:DE:2A:EF:C1:66:6F:FD:4A
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:autoconfig.health-status.ru, DNS:autoconfig.psk-net.ru, DNS:autodiscover.health-status.ru, DNS:autodiscover.psk-net.ru, DNS:mail.health-status.ru, DNS:mail.psk-net.ru, DNS:smtp.health-status.ru, DNS:webmail.health-status.ru
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/7.crl
ct_precert_scts
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 : Oct 21 14:50:04.962 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:05:CA:53:71:6E:AA:7F:B5:4C:31:2F:C9: AE:44:E2:52:DC:3B:E5:C6:A5:E6:0E:50:3B:F8:BD:22: 82:7B:34:57:02:21:00:C6:D7:C8:D1:A4:FE:94:80:66: 91:16:7F:46:DB:5A:FC:19:24:32:DD:99:68:3A:CE:C3: ED:25:38:9F:4E:6A:12 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:E8:22:FC:2B:AB:0E:92:EE:D0:E9:FA:D6:96:64:60: 27:76:D0:17:60:E0:89:05:09:C9:23:A1:B0:3F:C3:7F Timestamp : Oct 21 14:50:01.831 2026 GMT Extensions: 00:00:05:00:0D:BC:A3:24 Signature : ecdsa-with-SHA256 30:44:02:20:08:30:AB:00:61:19:DB:D5:D1:91:91:2A: 45:54:6C:21:EC:46:8A:49:6A:E9:F5:AC:D6:CB:1A:F8: 37:05:1F:FE:02:20:7A:1B:74:9B:D6:10:E9:A8:63:15: 1F:1C:77:1E:E9:A5:3C:87:E5:32:07:A7:39:76:9B:93: E3:C1:54:75:1D:54
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-31T09:24:53+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
672
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2133
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/ 
-----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

Registration / WHOIS →DNS records →