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

mx2.comtegra.pl · 45.65.124.2:443

Verified

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

Subject
C=PL ST=Województwo mazowieckie L=WARSZAWA O="COMTEGRA" SA CN=*.comtegra.pl
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=GeoTrust TLS RSA CA G1
Valid from
2025-12-23T00:00:00+00:00
Expires
2027-01-15T23:59:59+00:00
Days remaining
100
Serial (hex)
059E958EC7EFB6B33ED84F06B20A207A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.comtegra.pl, DNS:comtegra.pl

SHA-256 fingerprint

E8:8B:AE:A2:D4:55:59:F8:87:6C:C5:56:DF:95:E1:68:24:1E:88:25:97:3A:5C:F9:26:1C:08:D5:B8:E1:60:0B
Certificate extensions & PEM
authorityKeyIdentifier
94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
subjectKeyIdentifier
7A:6E:94:9C:DE:BF:57:2C:82:87:26:19:DD:38:EA:0C:57:48:AC:F0
subjectAltName
DNS:*.comtegra.pl, DNS:comtegra.pl
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
crlDistributionPoints
Full Name: URI:http://cdp.geotrust.com/GeoTrustTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.geotrust.com CA Issuers - URI:http://cacerts.geotrust.com/GeoTrustTLSRSACAG1.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Dec 23 11:57:40.013 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:D5:20:42:CF:D2:96:01:00:C6:08:D8: 59:65:4A:8F:99:52:95:EE:CC:9F:28:A2:A1:C4:FE:E4: 4F:02:55:40:23:02:20:7D:DB:B7:B5:E1:A3:60:BC:0A: FF:F1:70:0B:E0:2D:A7:3C:D1:DF:8F:5C:BF:29:93:79: B2:0F:C4:33:AA:E2:0B 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 : Dec 23 11:57:39.952 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:40:C8:1F:67:C7:4B:9C:53:36:BF:34:62: A8:F3:E6:3A:5A:68:5F:11:21:70:14:17:BC:40:68:6E: 1B:69:38:80:02:20:7F:4D:E7:96:57:0B:2C:65:AD:E0: 87:C6:A7:E6:38:20:EF:29:CF:CF:3F:76:F1:F8:87:C6: 6F:5B:7D:FB:96:28 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Dec 23 11:57:40.196 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:3E:A2:7C:3A:81:C3:89:A2:04:8B:D7:3C: B6:B4:15:12:D8:FE:9F:58:F1:E8:01:B3:52:C3:95:F7: E5:9E:38:6F:02:21:00:CB:05:79:59:69:5C:6E:95:CB: DB:50:3A:35:54:C6:21:E9:4D:56:AE:B8:95:92:60:97: 07:A1:5D:F5:E3:CE:E0
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-07T04:01:28+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=GeoTrust TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:23:37+00:00
Expires
2027-11-02T12:23:37+00:00
Days remaining
391
Serial (hex)
0D07782A133FC6F9A57296E131FFD179
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

C0:6E:30:7F:7C:FC:1D:32:FA:72:A4:C0:33:C8:7B:90:01:9A:F2:16:F0:77:5D:64:97:8A:2E:CA:6C:8A:23:0E
Certificate extensions & PEM
subjectKeyIdentifier
94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.digicert.com/CPS
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2013-08-01T12:00:00+00:00
Expires
2038-01-15T12:00:00+00:00
Days remaining
4118
Serial (hex)
033AF1E6A711A9A0BB2864B11D09FAE5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CB:3C:CB:B7:60:31:E5:E0:13:8F:8D:D3:9A:23:F9:DE:47:FF:C3:5E:43:C1:14:4C:EA:27:D4:6A:5A:B1:CB:5F
Certificate extensions & PEM
basicConstraints
CA:TRUE
keyUsage
Digital Signature, Certificate Sign, CRL Sign
subjectKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
-----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

Registration / WHOIS →DNS records →