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

ns1.sprintdatacenter.pl · 46.29.17.41:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `ns1.sprintdatacenter.pl'

Certificate verification failed

Subject
CN=panel01.sprintdatacenter.pl
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-14T04:41:52+00:00
Expires
2027-01-12T04:41:51+00:00
Days remaining
66
Serial (hex)
05E5BE88AB1FACD186BA16FA615B938D5499
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:mail01.sprintdatacenter.pl, DNS:panel01.sprintdatacenter.pl

SHA-256 fingerprint

AD:03:D4:5C:93:D3:A7:DD:82:65:85:FD:C9:75:74:59:D5:60:8E:2F:C1:A0:9D:12:1C:19:9B:C4:27:31:D3:2A
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
1C:98:36:44:BC:68:65:0D:64:BC:72:84:F1:5C:4E:55:29:B3:AA:AF
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:mail01.sprintdatacenter.pl, DNS:panel01.sprintdatacenter.pl
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/26.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 14 05:40:22.967 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:93:B7:93:F2:0F:94:E4:A0:1A:29:28: E0:ED:FF:C3:46:8D:5C:6D:23:5E:37:3C:48:C6:6E:C9: FF:DA:55:13:16:02:20:64:ED:FB:33:05:2B:69:0C:F7: 7C:B9:5A:CF:63:5B:12:B6:C1:3F:AC:EE:1F:A7:D4:56: 5C:7A:51:51:FD:DD:95 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 14 05:40:20.022 2026 GMT Extensions: 00:00:05:00:0A:26:B0:4B Signature : ecdsa-with-SHA256 30:44:02:20:11:C9:F6:8A:CE:84:AF:4B:AF:42:B2:E3: 6A:9C:8E:85:F6:4B:22:13:B5:35:6F:DF:3C:37:26:25: DF:97:3F:4B:02:20:3A:22:4F:43:02:32:4A:29:93:CF: CF:10:F2:2E:A1:3A:45:C5:21:65:3A:1B:E4:CA:F1:71: F2:88:1C:F3:1F:EE
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-11-06T18:12:49+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
666
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
2127
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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