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

mweb.com · 13.244.185.4:443

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=fast.co.za
Issuer
C=US O=Let's Encrypt CN=R10
Valid from
2025-07-18T10:58:01+00:00
Expires
2025-10-16T10:58:00+00:00
Days remaining
-342
Serial (hex)
06BBF40163B4AF56D81CFFA855143FB549A5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:alwayson.co.za, DNS:bigblackbox.co.za, DNS:callsaver.co.za, DNS:cis.co.za, DNS:corpdial.co.za, DNS:ctnet.co.za, DNS:dsl512two.co.za, DNS:dslmweb.co.za, DNS:fast.co.za, DNS:freetheweb.co.za, DNS:netactive.co.za, DNS:onwe.co.za, DNS:www.alwayson.co.za, DNS:www.bigblackbox.co.za, DNS:www.callsaver.co.za, DNS:www.cis.co.za, DNS:www.corpdial.co.za, DNS:www.ctnet.co.za, DNS:www.dsl512two.co.za, DNS:www.dslmweb.co.za, DNS:www.fast.co.za, DNS:www.freetheweb.co.za, DNS:www.netactive.co.za, DNS:www.onwe.co.za

SHA-256 fingerprint

1E:C3:26:1B:FA:84:86:85:87:59:AA:E6:90:E3:82:D2:6B:BC:8B:91:26:E6:73:E3:60:45:95:79:54:6F:E8:4D
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
1F:01:40:F4:2C:B4:D3:96:DF:7F:B7:05:55:60:E8:6C:8B:B8:03:D5
authorityKeyIdentifier
BB:BC:C3:47:A5:E4:BC:A9:C6:C3:A4:72:0C:10:8D:A2:35:E1:C8:E8
authorityInfoAccess
CA Issuers - URI:http://r10.i.lencr.org/
subjectAltName
DNS:alwayson.co.za, DNS:bigblackbox.co.za, DNS:callsaver.co.za, DNS:cis.co.za, DNS:corpdial.co.za, DNS:ctnet.co.za, DNS:dsl512two.co.za, DNS:dslmweb.co.za, DNS:fast.co.za, DNS:freetheweb.co.za, DNS:netactive.co.za, DNS:onwe.co.za, DNS:www.alwayson.co.za, DNS:www.bigblackbox.co.za, DNS:www.callsaver.co.za, DNS:www.cis.co.za, DNS:www.corpdial.co.za, DNS:www.ctnet.co.za, DNS:www.dsl512two.co.za, DNS:www.dslmweb.co.za, DNS:www.fast.co.za, DNS:www.freetheweb.co.za, DNS:www.netactive.co.za, DNS:www.onwe.co.za
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://r10.c.lencr.org/38.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A4:42:C5:06:49:60:61:54:8F:0F:D4:EA:9C:FB:7A:2D: 26:45:4D:87:A9:7F:2F:DF:45:59:F6:27:4F:3A:84:54 Timestamp : Jul 18 11:56:31.729 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:CE:BC:9A:E9:AE:B3:B2:54:26:7A:A1: 94:0C:12:C9:66:30:18:1B:CB:8C:6D:7E:5D:58:5B:59: 9A:5F:42:4E:3F:02:20:18:FB:D7:74:AF:EC:4B:89:FA: E7:C5:F8:C0:AF:7B:1A:8B:C4:8E:26:C4:12:F2:34:9B: D8:16:27:C7:06:4F:1F Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:04:FF:49:D0:54:1D:40:AF:F6:A0:C3:BF:F1:D8:C4: 67:2F:4E:EC:EE:23:40:68:98:6B:17:40:2E:DC:89:7D Timestamp : Jul 18 11:56:31.811 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:4A:71:C1:F4:24:33:FE:87:43:A7:8C:97: 90:34:E9:91:38:6F:7E:6E:F9:4D:7A:33:06:B2:28:CA: CA:F8:C5:26:02:20:6B:17:B2:A5:14:F6:24:C2:57:2A: 5B:7D:1B:59:9D:1D:7D:60:37:92:53:FC:0D:A9:9F:6E: B5:15:95:42:3A:B2
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-22T20:03:21+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R10
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
171
Serial (hex)
4BA85293F79A2FA273064BA8048D75D0
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

9D:7C:3F:1A:A6:AD:2B:2E:C0:D5:CF:1E:24:6F:8D:9A:E6:CB:C9:FD:07:55:AD:37:BB:97:4B:1F:2F:B6:03:F3
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
BB:BC:C3:47:A5:E4:BC:A9:C6:C3:A4:72:0C:10:8D:A2:35:E1:C8:E8
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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