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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

mx10.continum.net · 80.72.131.30:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `mx10.continum.net'

Certificate verification failed

Subject
CN=mail-gw01.l2.continum.net
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-20T01:40:11+00:00
Expires
2027-01-18T01:40:10+00:00
Days remaining
88
Serial (hex)
050DEA3E6960AAC814118EFFF02A64A8E94B
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:mail-gw01.l2.continum.net

SHA-256 fingerprint

12:42:0B:AE:63:49:8E:DB:AF:E8:95:BC:8F:8D:02:B9:1A:5E:1B:4D:39:1C:01:3C:94:62:DD:93:6D:C4:8C:2F
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
FD:45:D9:CC:82:57:E5:A1:AF:9B:D4:86:F6:39:03:C3:B7:5A:85:41
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:mail-gw01.l2.continum.net
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/76.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:A2:39:67:C6:0D:B6:46:87:C6:6F:3D:F9:99:94:76: 93:A6:A6:11:20:84:57:D5:55:E7:E3:D0:A1:D9:B6:46 Timestamp : Oct 20 02:38:41.891 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:26:7E:EE:BB:B6:A2:FF:20:33:31:93:9D: 5E:F6:35:2D:DF:AA:D4:3F:06:70:73:0D:C2:BF:E6:6B: B9:F5:96:79:02:21:00:B2:6C:DC:DC:4C:30:4A:BC:E1: CC:54:B0:0F:28:53:07:DA:D0:99:FC:96:A7:17:97:73: 46:3D:B0:30:78:16:7A 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 20 02:38:38.808 2026 GMT Extensions: 00:00:05:00:0D:04:B4:C1 Signature : ecdsa-with-SHA256 30:45:02:21:00:EC:9D:54:18:49:31:BD:19:2B:D3:31: 22:26:0C:28:30:8D:50:6A:A9:95:30:A0:E1:CF:A9:00: 0B:19:1D:F2:09:02:20:58:C8:49:2F:9B:43:27:9D:22: C9:9F:FA:9B:B2:CA:F6:F0:42:FD:9D:C1:11:01:F8:F8: 74:3F:00:10:19:A2:41
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-21T07:32:40+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
682
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
2143
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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