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.primorye.ru · 212.107.220.10:443

Verified
The certificate expires within 30 days.

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

Subject
CN=mail.primorye.ru
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-07-26T13:05:56+00:00
Expires
2026-10-24T13:05:55+00:00
Days remaining
25
Serial (hex)
051415DDB63C8A400530E39EAA60CD16D095
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:imap.kht.ru, DNS:imap.sakhalin.ru, DNS:mail.ab.ru, DNS:mail.kemtel.ru, DNS:mail.kuzbass.net, DNS:mail.primorye.ru, DNS:mail.sakhalin.ru, DNS:pop.kht.ru, DNS:pop3.ab.ru, DNS:pop3.kht.ru, DNS:pop3.sakhalin.ru, DNS:relay.ab.ru, DNS:smtp.kht.ru, DNS:smtp.sakhalin.ru

SHA-256 fingerprint

04:D1:B0:49:6D:B1:B3:03:F4:6A:53:AF:8D:93:1F:79:3E:F6:DB:A1:B3:1C:0D:87:72:06:4E:9D:6A:1D:11:DB
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
08:38:FE:7B:E2:CA:0D:1B:7E:16:87:EA:08:EC:2D:31:08:B5:5C:E5
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:imap.kht.ru, DNS:imap.sakhalin.ru, DNS:mail.ab.ru, DNS:mail.kemtel.ru, DNS:mail.kuzbass.net, DNS:mail.primorye.ru, DNS:mail.sakhalin.ru, DNS:pop.kht.ru, DNS:pop3.ab.ru, DNS:pop3.kht.ru, DNS:pop3.sakhalin.ru, DNS:relay.ab.ru, DNS:smtp.kht.ru, DNS:smtp.sakhalin.ru
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/22.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Jul 26 14:04:26.629 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:07:1A:1E:54:9C:AF:87:9B:75:21:10:0E: 62:C3:C5:B6:83:6D:1D:C9:4F:F6:1B:21:ED:B3:65:1C: 6B:6C:E8:B4:02:21:00:EE:91:BB:3F:3A:67:32:5D:8D: C8:6E:DA:21:7A:DF:4D:D3:98:2D:B2:28:54:D1:B9:98: E1:01:98:F1:BC:AD:F6 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 26:E3:64:6E:58:69:21:23:BC:34:3F:47:24:35:9B:37: 92:CD:24:5A:88:D8:15:D3:93:33:FD:99:18:AB:47:23 Timestamp : Jul 26 14:04:25.711 2026 GMT Extensions: 00:00:05:00:2D:9A:13:B7 Signature : ecdsa-with-SHA256 30:44:02:20:7E:3D:B2:DF:34:FC:E2:44:34:F9:07:BA: B4:EB:88:2F:FD:05:EA:98:98:F3:0F:29:FC:AB:88:F4: D9:DF:01:6F:02:20:46:21:27:22:6B:B0:D9:31:69:14: 0E:C3:DB:35:59:B2:FF:A9:4C:77:72:D3:24:02:8C:8F: 42:93:8F:8D:C5:13
-----BEGIN CERTIFICATE-----
MIIGvjCCBaagAwIBAgISBRQV3bY8ikAFMOOeqmDNFtCVMA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNZUjEwHhcNMjYwNzI2MTMwNTU2WhcNMjYxMDI0MTMwNTU1WjAbMRkwFwYDVQQD
ExBtYWlsLnByaW1vcnllLnJ1MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKC
AgEAtfY6vTQ0EvJOnpI/h3mcyjnBdUH+iqBcrXbNqz3qnQ09oBf3Zik9IVbK9gza
wCAIwkWYf4/j1hzwPplJuq0J3TS4fZjWsmGMvcXkNCC8xW1lv/e4bHdfU8dR9djg
cR2v82tSEohtWSVRtMvmnidIAifkejIBXC09BNnDLttb02BDjeVj7ALy/L4Ti9AW
R0Yd7x1snS1OT1w2vhzh1ndvRXWD/jbYWXIIVTNtFEhiDe54+RNRxxq8dupDzLvU
TGPfIxqF1RxFYeMfMMFcXpxSL69JfZxyxBlpnkzJJpXa3K9hURlEKm/ZXU9pYoG2
RHoH44mTt8EzDzEWdp8m3BDyWXald7OIClszsgUCk9SAEihNhXE5rTpGf8pArNBt
o53xxFTfT/CYTUZmVZr421ySCx+3TdyKE6CxGqfIStxf04Yv1zvcb2jtIewtYps3
VwZciBPH3r9PMgUYWR0Si/fqJgSJRc2WHnUaM5hXRpYtYr4JHw4WFk25Lw2AiRIC
FNCqVO5ukKv80BVynJR8dotHG4LJJthHiVKBBAJkjMdf64ZObEgull0f+Tb3/N3N
X74EeJFa94TbCT1CW855PqhCkbULXGcHUr+e0wGF8HAYeojW199NAYmExMWbtajl
nu8nrmQT9LVH+Ghmhnxe0SOWJn3LpadCAo7K2OXYcNh0l0kCAwEAAaOCAuIwggLe
MA4GA1UdDwEB/wQEAwIFoDATBgNVHSUEDDAKBggrBgEFBQcDATAMBgNVHRMBAf8E
AjAAMB0GA1UdDgQWBBQIOP574soNG34Wh+oI7C0xCLVc5TAfBgNVHSMEGDAWgBQf
LzW+RhSCzUCxrnksVXj699Ro+zAzBggrBgEFBQcBAQQnMCUwIwYIKwYBBQUHMAKG
F2h0dHA6Ly95cjEuaS5sZW5jci5vcmcvMIHfBgNVHREEgdcwgdSCC2ltYXAua2h0
LnJ1ghBpbWFwLnNha2hhbGluLnJ1ggptYWlsLmFiLnJ1gg5tYWlsLmtlbXRlbC5y
dYIQbWFpbC5rdXpiYXNzLm5ldIIQbWFpbC5wcmltb3J5ZS5ydYIQbWFpbC5zYWto
YWxpbi5ydYIKcG9wLmtodC5ydYIKcG9wMy5hYi5ydYILcG9wMy5raHQucnWCEHBv
cDMuc2FraGFsaW4ucnWCC3JlbGF5LmFiLnJ1ggtzbXRwLmtodC5ydYIQc210cC5z
YWtoYWxpbi5ydTATBgNVHSAEDDAKMAgGBmeBDAECATAuBgNVHR8EJzAlMCOgIaAf
hh1odHRwOi8veXIxLmMubGVuY3Iub3JnLzIyLmNybDCCAQsGCisGAQQB1nkCBAIE
gfwEgfkA9wB2AMIxfldFGaNF7n843rKQQevHwiFaIr9/1bWtdprZDlLNAAABn569
zIUAAAQDAEcwRQIgBxoeVJyvh5t1IRAOYsPFtoNtHclP9hsh7bNlHGts6LQCIQDu
kbs/OmcyXY3Ibtohet9N05gtsihU0bmY4QGY8byt9gB9ACbjZG5YaSEjvDQ/RyQ1
mzeSzSRaiNgV05Mz/ZkYq0cjAAABn569yO8ACAAABQAtmhO3BAMARjBEAiB+PbLf
NPziRDT5B7q064gv/QXqmJjzDyn8q4j02d8BbwIgRiEnImuw2TFpFA7D2zVZsv+p
THdy0yQCjI9Ck4+NxRMwDQYJKoZIhvcNAQELBQADggEBAG6JrOkAzqiXkURkqiXR
iwoDwJwfbQJD3TILHX6l7MOpkKyPxvVCyERXp91HIMkgrIFSHWZeVCc7D62NUM3X
53Df385p2YiOErlFoAgjMbGiltE5s5hD4bFDcBjuV4/oWKSQeAolPS8mm3YUdvcC
HxQFbr1NadHGApZD8ana5IpWe5YTQigDnW+nRZlvqEa1dWxnfWmUgue6WVpmLtbt
Fuxf+NMdcOirDZXidBzY9RldcdjU2WKKfGA8eWJuisjwOLt5UPkpOYQDYMQgbLU0
ROv3KCPp7pRzl14+FWDUmklaOZnU2cGXdoB/1vufxEsFa3SEDk96rP/ZaTi9EiHJ
QP0=
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-28T23:44:54+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
705
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
2166
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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