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

dns2.mserwis.pl · 185.221.108.41:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `dns2.mserwis.pl'

Certificate verification failed

Subject
CN=autoconfig.cpanel5.mserwis.pl
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-20T06:29:27+00:00
Expires
2027-01-18T06:29:26+00:00
Days remaining
89
Serial (hex)
0665AEB3D024E4D5CA494863FF783CA2EDE1
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:autoconfig.cpanel5.mserwis.pl, DNS:cpanel.cpanel5.mserwis.pl, DNS:cpanel5.mserwis.pl, DNS:cpcalendars.cpanel5.mserwis.pl, DNS:mail.cpanel5.mserwis.pl, DNS:webdisk.cpanel5.mserwis.pl, DNS:webmail.cpanel5.mserwis.pl, DNS:whm.cpanel5.mserwis.pl, DNS:www.cpanel5.mserwis.pl

SHA-256 fingerprint

BC:30:96:5B:33:AD:71:5F:AD:DF:B9:ED:C3:7D:33:87:53:3F:DA:39:25:46:F2:EF:1D:C4:56:5B:36:F5:D1:B9
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
6E:D2:1E:1D:28:19:F9:13:41:81:05:AF:A5:BF:2A:4E:D0:43:C0:9F
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.cpanel5.mserwis.pl, DNS:cpanel.cpanel5.mserwis.pl, DNS:cpanel5.mserwis.pl, DNS:cpcalendars.cpanel5.mserwis.pl, DNS:mail.cpanel5.mserwis.pl, DNS:webdisk.cpanel5.mserwis.pl, DNS:webmail.cpanel5.mserwis.pl, DNS:whm.cpanel5.mserwis.pl, DNS:www.cpanel5.mserwis.pl
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/98.crl
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 : Oct 20 07:27:58.171 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:FE:78:20:FD:A7:D1:10:96:EE:E5:F0: A4:A9:D0:3E:B7:06:BE:3B:AF:5B:A8:E1:1D:12:A4:F0: 14:97:1C:5C:D3:02:21:00:D3:BF:B7:26:15:8F:9D:55: 66:C0:AE:27:79:85:3A:B6:C9:1E:C7:2C:A2:45:00:BD: D5:67:A7:68:09:1D:61:DC Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A2:81:00:18:73:4E:17:6E:1D:47:E0:95:40:F3:81:BA: 54:66:97:CD:63:A8:43:50:71:6E:B8:09:4E:DA:F1:0D Timestamp : Oct 20 07:27:59.074 2026 GMT Extensions: 00:00:05:00:28:E8:B5:B8 Signature : ecdsa-with-SHA256 30:45:02:20:5C:C3:DA:48:B2:48:18:E3:E9:21:C6:06: 05:B6:9E:DE:9A:D6:55:60:12:A3:31:9D:A4:86:09:04: 6F:11:02:73:02:21:00:8B:00:10:41:07:20:59:8C:A3: 81:13:2E:D2:4E:EB:DD:16:96:25:E4:7B:87:3E:C2:7B: 9A:46:E0:7C:95:F6:54
-----BEGIN CERTIFICATE-----
MIIF6DCCBNCgAwIBAgISBmWus9Ak5NXKSUhj/3g8ou3hMA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNZUjIwHhcNMjYxMDIwMDYyOTI3WhcNMjcwMTE4MDYyOTI2WjAoMSYwJAYDVQQD
Ex1hdXRvY29uZmlnLmNwYW5lbDUubXNlcndpcy5wbDCCASIwDQYJKoZIhvcNAQEB
BQADggEPADCCAQoCggEBALOGeto12wvH50G1fxLp94DEWkki796xnDGUkYAZKp6p
i+JcP/UIg/yBQSorLyFw1jd54njZ4dc0z0xD7mdS1cKpgoRj0H22DHhRfed3MZ9j
84CNuXodxYbM/bYPuiJ9bLlvo998iuBVOqq46fZKIS+8y5EoFH7Y4aJICekUgkIS
X1nHoqVcpqYqTG2NVTbpEYsH8jlKV2KC4t2HNB3bVHMk5yxehsbJ/Obc3poWNaGW
McZ1CQIqddS7vzKIP7NWm3k/aShimQvF8VkGWWPoKdgYBGEK+x+mx2UiTYMjsN4C
UEPmC0DMdjP65n+4rM+uAAcJI+hfHqdL03hqQL4h4AUCAwEAAaOCAv8wggL7MA4G
A1UdDwEB/wQEAwIFoDATBgNVHSUEDDAKBggrBgEFBQcDATAMBgNVHRMBAf8EAjAA
MB0GA1UdDgQWBBRu0h4dKBn5E0GBBa+lvypO0EPAnzAfBgNVHSMEGDAWgBRAFS0m
ee0yIJ7fmnId1jIfgQyBDDAzBggrBgEFBQcBAQQnMCUwIwYIKwYBBQUHMAKGF2h0
dHA6Ly95cjIuaS5sZW5jci5vcmcvMIH6BgNVHREEgfIwge+CHWF1dG9jb25maWcu
Y3BhbmVsNS5tc2Vyd2lzLnBsghljcGFuZWwuY3BhbmVsNS5tc2Vyd2lzLnBsghJj
cGFuZWw1Lm1zZXJ3aXMucGyCHmNwY2FsZW5kYXJzLmNwYW5lbDUubXNlcndpcy5w
bIIXbWFpbC5jcGFuZWw1Lm1zZXJ3aXMucGyCGndlYmRpc2suY3BhbmVsNS5tc2Vy
d2lzLnBsghp3ZWJtYWlsLmNwYW5lbDUubXNlcndpcy5wbIIWd2htLmNwYW5lbDUu
bXNlcndpcy5wbIIWd3d3LmNwYW5lbDUubXNlcndpcy5wbDATBgNVHSAEDDAKMAgG
BmeBDAECATAuBgNVHR8EJzAlMCOgIaAfhh1odHRwOi8veXIyLmMubGVuY3Iub3Jn
Lzk4LmNybDCCAQ0GCisGAQQB1nkCBAIEgf4EgfsA+QB3AByfaCzp+vBFaVD4G5aK
h93bMhDYTObIsuOCUkrEz1mfAAABoVg1uNsAAAQDAEgwRgIhAP54IP2n0RCW7uXw
pKnQPrcGvjuvW6jhHRKk8BSXHFzTAiEA07+3JhWPnVVmwK4neYU6tskexyyiRQC9
1WenaAkdYdwAfgCigQAYc04Xbh1H4JVA84G6VGaXzWOoQ1BxbrgJTtrxDQAAAaFY
NbxiAAgAAAUAKOi1uAQDAEcwRQIgXMPaSLJIGOPpIcYGBbae3prWVWASozGdpIYJ
BG8RAnMCIQCLABBBByBZjKOBEy7STuvdFpYl5HuHPsJ7mkbgfJX2VDANBgkqhkiG
9w0BAQsFAAOCAQEAgQv7Pylwpm0+xx1Pat1kwL5XHa6HoRAvpZPvKNrlbQCHS6HQ
LqsPjrV6mffAu/YRuCUTaOvAD+1EaQWrnKeCVsIgr8CXn33tC/6m4QvLQr22hShT
AtJefs6EfCIBxawccn/ZHqlEy+tP4MVnkN8KYx60F8IBMxKVpb3QV3icW9a7yhW6
dtGh+992dVNWUXtwB+ZzKFPxcC1j6b5vt5nHbM0Lotgenj27vaUPcur39lipao2F
/xwPtmTv8BxM1yWbO4hzmo5bVVv4Axt4LFyHV2Xr0OQ+ETvg9Ut0viU2ijwgt4PV
ERNGewyVvVsmow+kz+7iQJDys8+I1XeIqEQJ6w==
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-20T11:14:12+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
683
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
2144
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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