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.serv-tech.ru · 185.64.76.8:443

Verified

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

Subject
CN=mail-ru.serv-tech.ru
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-08-20T06:33:50+00:00
Expires
2026-11-18T06:33:49+00:00
Days remaining
38
Serial (hex)
06F774858A34EA0D762FB5FADECFA2492172
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.serv-tech.ru, DNS:autoconfig.vpsok.ru, DNS:autodiscover.serv-tech.ru, DNS:autodiscover.vpsok.ru, DNS:mail-ru.serv-tech.ru, DNS:mail.serv-tech.ru

SHA-256 fingerprint

51:C9:18:65:BC:0A:C2:62:2E:27:90:F2:84:7D:49:5B:1F:32:2A:EA:D6:F5:CF:97:38:5D:BF:67:FC:89:8D:34
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
43:73:54:0D:61:6C:57:2A:DF:83:3F:E3:45:C3:62:E2:0A:37:34:A7
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.serv-tech.ru, DNS:autoconfig.vpsok.ru, DNS:autodiscover.serv-tech.ru, DNS:autodiscover.vpsok.ru, DNS:mail-ru.serv-tech.ru, DNS:mail.serv-tech.ru
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/115.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Aug 20 07:32:20.556 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:AB:27:F0:35:65:82:7F:35:B4:7B:9D: 20:5F:6D:44:B9:AB:06:A2:22:62:B6:D2:44:1F:5D:1F: F1:03:20:FC:D2:02:21:00:89:2E:3B:91:E0:4C:57:52: EA:4A:E1:0A:F2:57:22:60:F9:B7:D3:53:B7:90:02:6D: 4F:63:FE:06:01:B1:6E:CA Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 6C:FE:50:19:43:A8:5E:A9:16:BC:52:D1:33:E4:DC:C9: 1E:F1:41:1C:7D:25:84:20:D1:73:80:9E:18:18:EB:3A Timestamp : Aug 20 07:32:20.992 2026 GMT Extensions: 00:00:05:00:20:7F:BE:0A Signature : ecdsa-with-SHA256 30:44:02:20:7C:5D:4D:98:AB:F8:CC:71:B7:D5:26:8B: 26:EA:1C:9E:89:EB:8E:AF:40:1B:5D:83:5A:62:F5:A2: AA:6F:0E:E6:02:20:29:AE:6D:A4:A3:4D:97:F3:69:F4: A6:C9:1D:25:9E:81:44:CE:66:98:B0:B9:A3:18:F8:A4: 21:11:36:06:DB:ED
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-10T07:18:26+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
693
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
2154
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

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