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

TLSv1.2

mail.jettel.ru · 176.115.192.132:443

Verified

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

Subject
CN=mail.jettel.ru
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-13T22:28:09+00:00
Expires
2027-01-11T22:28:08+00:00
Days remaining
66
Serial (hex)
06C418140EA50B6CAF5AB76F9BB031A3225B
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

DNS:autodiscover.jettel.ru, DNS:autodiscover.start.moscow, DNS:autodiscover.startit.ru, DNS:autodiscover.unittel.ru, DNS:autodiscover.vasenkov.ru, DNS:autodiscover.vasenkova.ru, DNS:jet-ex03.jettel.ru, DNS:mail.jettel.ru, DNS:mail.start.moscow, DNS:mail.startit.ru, DNS:mail.unittel.ru, DNS:mail.vasenkov.ru, DNS:mail.vasenkova.ru, DNS:owa.jettel.ru, DNS:owa.startit.ru, DNS:owa.unittel.ru, DNS:owa.vasenkov.ru, DNS:owa.vasenkova.ru

SHA-256 fingerprint

0D:4A:60:70:9A:33:67:58:B2:1E:4A:46:E9:1E:E2:31:F2:D7:21:3E:5A:10:BC:67:3B:E9:84:FA:2E:58:40:0A
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
06:B9:09:5B:99:2C:6A:6E:0C:8A:A0:CD:91:10:A0:4A:10:8B:45:DA
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:autodiscover.jettel.ru, DNS:autodiscover.start.moscow, DNS:autodiscover.startit.ru, DNS:autodiscover.unittel.ru, DNS:autodiscover.vasenkov.ru, DNS:autodiscover.vasenkova.ru, DNS:jet-ex03.jettel.ru, DNS:mail.jettel.ru, DNS:mail.start.moscow, DNS:mail.startit.ru, DNS:mail.unittel.ru, DNS:mail.vasenkov.ru, DNS:mail.vasenkova.ru, DNS:owa.jettel.ru, DNS:owa.startit.ru, DNS:owa.unittel.ru, DNS:owa.vasenkov.ru, DNS:owa.vasenkova.ru
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/92.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 13 23:26:39.254 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:E5:7A:5C:A1:8C:AD:00:6D:A5:CD:8E: 02:D5:F9:79:57:3E:CA:47:B1:CB:CD:64:B9:CF:2A:89: 0F:C9:EA:77:62:02:20:57:7A:B8:4E:75:7E:5D:E4:68: 73:76:74:B1:4B:2E:3E:D3:4F:F9:1E:DA:D4:4B:6E:B5: 27:6F:61:7A:08:05:18 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Oct 13 23:26:39.353 2026 GMT Extensions: 00:00:05:00:0C:B8:E0:97 Signature : ecdsa-with-SHA256 30:44:02:20:05:14:40:34:69:B6:BD:98:BE:0B:79:59: 28:6E:71:66:3E:D7:3E:97:44:8F:97:9F:75:10:FA:BC: C0:BA:95:35:02:20:4E:31:D4:30:75:0C:DF:D0:AF:72: 19:FA:34:3F:47:E8:0E:13:AC:9D:A0:42:EE:C5:40:AF: 0E:E6:55:79:56:D4
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-11-05T23:01:31+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
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
667
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
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
2128
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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