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

mx01.dialtelecom.cz · 212.24.129.194:443

Verified

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

Subject
CN=dialtelecom.cz
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-11T18:59:42+00:00
Expires
2027-01-09T18:59:41+00:00
Days remaining
60
Serial (hex)
05E48FCA1AE4390368A0B79C2857182A15DD
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.dialtelecom.cz, DNS:ca.inway.cz, DNS:dialtelecom.cz, DNS:mbox.inway.cz

SHA-256 fingerprint

2F:49:97:01:C9:47:CF:8B:4F:B9:D5:60:5C:4B:1E:36:50:30:0B:DB:4F:C0:07:A5:FE:10:E0:0B:14:84:69:C0
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
E2:87:58:5A:5C:31:CE:9C:54:0B:0E:9E:9D:EB:F1:22:08:AA:09:82
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:*.dialtelecom.cz, DNS:ca.inway.cz, DNS:dialtelecom.cz, DNS:mbox.inway.cz
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/94.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Oct 11 19:58:12.396 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:17:08:53:5C:9D:A1:F5:4C:6B:E5:BC:54: D3:57:33:1F:FC:72:83:7C:A2:37:7F:5D:59:1D:1C:8B: ED:7B:A9:42:02:20:7D:E2:4D:AF:D8:3A:B1:56:1A:DD: 5B:AE:75:9B:35:B3:C4:F9:43:42:A2:EA:1B:21:45:B4: DA:29:EF:2E:24:89 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Oct 11 19:58:12.724 2026 GMT Extensions: 00:00:05:00:21:3C:8A:2D Signature : ecdsa-with-SHA256 30:46:02:21:00:DA:0B:A3:6B:58:D8:C7:EC:D7:E9:FD: CC:CD:EE:03:8A:CF:98:31:56:AA:CC:1C:C8:40:C3:E5: 4B:F2:CD:5C:6B:02:21:00:A4:5B:69:68:2B:A9:D5:A1: A5:C0:12:B4:7B:2D:5A:C9:5D:91:91:32:BC:A9:1C:C3: 16:D1:F2:2B:F4:EB:35:73
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-11-09T21:01:20+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
663
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
2124
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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