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

smtp.advaix.net · 185.38.210.23:443

Verified

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

Subject
CN=*.advaix.net
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-08-06T09:29:03+00:00
Expires
2027-02-21T09:29:02+00:00
Days remaining
140
Serial (hex)
3771AB08FB328F0AF3E2EA51A1D09425
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.advaix.net, DNS:advaix.net

SHA-256 fingerprint

22:39:FF:B2:12:F4:98:47:89:D2:6A:31:0D:E3:D0:EE:33:59:32:66:BB:82:12:37:49:36:45:F3:8C:64:AA:0B
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://certumdvtlsg2r39ca.crl.certum.pl/certumdvtlsg2r39ca.crl
authorityInfoAccess
OCSP - URI:http://certumdvtlsg2r39ca.ocsp-certum.com CA Issuers - URI:http://certumdvtlsg2r39ca.repository.certum.pl/certumdvtlsg2r39ca.cer
authorityKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.2.616.1.113527.2.101.1
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.advaix.net, DNS:advaix.net
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Aug 6 09:29:04.397 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:93:7B:23:7B:C3:E1:3D:7D:2F:8B:E5: FC:84:6F:CF:FD:14:EC:F9:10:40:25:CA:F3:0B:65:73: 9F:FC:14:A2:0E:02:20:43:C3:36:98:21:B2:C1:C7:1B: 61:F1:3C:3C:B0:85:E8:64:F5:49:D0:21:35:F7:62:AD: AC:64:98:4B:5B:4A:A2 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 : Aug 6 09:29:04.254 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:AB:8C:B8:DB:12:E2:51:CE:78:EB:44: DF:21:75:F6:2D:23:6B:D8:BA:20:AD:9B:B8:0E:0B:99: 98:3A:32:56:37:02:21:00:AC:01:4B:84:EB:2F:56:BD: C9:68:08:B3:98:BC:E8:DB:8C:D0:3B:7F:A4:99:ED:54: 49:4D:81:C2:17:97:61:E2 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Aug 6 09:29:04.218 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:60:65:75:B5:01:A9:59:CE:A9:89:9E:CF: FF:F9:FD:E5:B4:EB:80:DB:0C:01:4E:AB:3B:26:26:97: F9:6A:4A:7F:02:20:60:B5:5F:0E:5E:F0:D7:7B:08:60: FF:F7:B3:24:CD:3E:17:88:36:15:04:9C:11:71:47:35: E8:D9:5B:8D:17:E4
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-03T13:20:08+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Valid from
2024-06-18T07:41:22+00:00
Expires
2039-06-05T07:41:22+00:00
Days remaining
4627
Serial (hex)
A82DD9E5DCAFDF13205E70043E6B95A8
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

83:C0:A5:A7:68:44:C8:40:DF:AF:82:0F:FD:02:AD:F6:57:3A:26:82:3E:F6:AF:75:8A:33:84:A0:AC:04:40:83
Certificate extensions & PEM
authorityInfoAccess
CA Issuers - URI:http://subca.repository.certum.pl/ctrca.cer OCSP - URI:http://subca.ocsp-certum.com
authorityKeyIdentifier
8C:FB:1C:75:BC:02:D3:9F:4E:2E:48:D9:F9:60:54:AA:C4:B3:4F:FA
basicConstraints
CA:TRUE, pathlen:0
crlDistributionPoints
Full Name: URI:http://subca.crl.certum.pl/ctrca.crl
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
keyUsage
Certificate Sign, CRL Sign
certificatePolicies
Policy: X509v3 Any Policy
subjectKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Valid from
2018-03-16T12:10:13+00:00
Expires
2043-03-16T12:10:13+00:00
Days remaining
6007
Serial (hex)
1EBF5950B8C980374C06F7EB554FB5ED
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

FE:76:96:57:38:55:77:3E:37:A9:5E:7A:D4:D9:CC:96:C3:01:57:C1:5D:31:76:5B:A9:B1:57:04:E1:AE:78:FD
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
8C:FB:1C:75:BC:02:D3:9F:4E:2E:48:D9:F9:60:54:AA:C4:B3:4F:FA
keyUsage
Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----
MIIFwDCCA6igAwIBAgIQHr9ZULjJgDdMBvfrVU+17TANBgkqhkiG9w0BAQ0FADB6
MQswCQYDVQQGEwJQTDEhMB8GA1UEChMYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
MScwJQYDVQQLEx5DZXJ0dW0gQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkxHzAdBgNV
BAMTFkNlcnR1bSBUcnVzdGVkIFJvb3QgQ0EwHhcNMTgwMzE2MTIxMDEzWhcNNDMw
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p1x4EaTByIVcJdPTsuclzxFUl6s1wB52HO8AU5853BSlLCIls3Jy/I2z5T4IHhQq
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5ePBAFmo+eggvIksDkc0C+pXwlM2/KfUrzHN/gLldfq5Jwn58/U7yn2fqSLLiMmq
0Uc9NneoWWRrJ8/vJ8HjJLWG965+Mk2weWjROeiQWMODvA8s1pfrzgzhIMfatz7D
P78v3DSk+yshzWePS/Tj6tQ/50+6uaWTRRxmHyH6ZF5v4HaUMst19W7l9o/HuKTM
qJZ9ZPskWkoDbGs4xugDQ5r3V7mzKWmTOPQD8rv7gmsHINFSH5pkAnuYZttcTVoP
0ISVoDwUQwbKytu4QTbaakRnh6+v40URFWkIsr4WOZckbxJF0WddCajJFdr60qZf
E2Efv4WstK2tBZQIgx51F9NxO5NQI1mg7TyRVJ12AMXDuDjb
-----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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