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

sms.mabnatelecom.com · 31.7.65.53:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed
The certificate has expired.

Certificate verification failed

Subject
CN=sms.mabnatelecom.com
Issuer
C=US O=Let's Encrypt CN=R12
Valid from
2025-12-29T18:48:26+00:00
Expires
2026-03-29T18:48:25+00:00
Days remaining
-196
Serial (hex)
06ADE01478C940F089D4576DCC0B4C77D3F4
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:sms.mabnatelecom.com

SHA-256 fingerprint

B2:B5:BA:23:28:BD:99:8C:08:A8:0C:49:09:74:C1:C7:FC:1F:E5:BA:B3:E8:FD:B2:A2:80:5C:32:34:DD:33:C8
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
49:88:FE:AC:F0:C5:7D:B5:6E:60:B9:20:BF:CA:B8:F2:20:F9:35:B4
authorityKeyIdentifier
00:B5:29:F2:2D:8E:6F:31:E8:9B:4C:AD:78:3E:FA:DC:E9:0C:D1:D2
authorityInfoAccess
CA Issuers - URI:http://r12.i.lencr.org/
subjectAltName
DNS:sms.mabnatelecom.com
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://r12.c.lencr.org/117.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 71:7E:95:F3:C2:38:8A:6D:B1:E3:84:49:3D:31:E1:5A: A9:62:08:76:2D:42:00:E0:05:0C:D0:67:B5:A6:61:E2 Timestamp : Dec 29 19:46:57.108 2025 GMT Extensions: 00:00:05:00:05:81:E5:77 Signature : ecdsa-with-SHA256 30:45:02:21:00:C1:79:BC:2A:3D:AE:CA:D6:EF:4E:85: 29:B7:66:34:F2:8D:4E:D9:F8:BE:70:E0:49:F9:FF:B3: 2A:74:EC:B3:34:02:20:22:F6:CA:5B:31:A7:11:0C:B9: 56:AF:9B:04:DA:13:A4:43:91:4C:B1:12:82:2D:31:AB: 5C:CA:FE:13:D5:B7:0C Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 0E:57:94:BC:F3:AE:A9:3E:33:1B:2C:99:07:B3:F7:90: DF:9B:C2:3D:71:32:25:DD:21:A9:25:AC:61:C5:4E:21 Timestamp : Dec 29 19:46:57.092 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:CB:55:1C:EE:B9:1D:3B:01:99:AC:7D: 47:9C:56:FE:B0:E1:C5:F2:DE:97:B3:04:EE:D4:36:31: 01:FE:12:1A:D5:02:21:00:F9:03:25:4F:49:2A:6B:14: 67:BC:B6:1A:9D:9A:58:9F:02:EB:E4:B1:B9:15:C3:B0: 9A:98:FF:97:CF:14:75:D5
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-11T04:18:06+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R12
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2024-03-13T00:00:00+00:00
Expires
2027-03-12T23:59:59+00:00
Days remaining
152
Serial (hex)
C212324B70A9B49171DC40F7E285263C
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:1F:CE:77:84:01:68:99:A5:A0:02:03:A9:EF:C8:0F:18:EB:BD:75:58:07:17:ED:C1:55:35:80:93:08:36:EC
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
00:B5:29:F2:2D:8E:6F:31:E8:9B:4C:AD:78:3E:FA:DC:E9:0C:D1:D2
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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