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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

nazwa.pl · 77.55.124.100:443

Verified

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

Subject
businessCategory=Private Organization jurisdictionC=PL jurisdictionST=małopolskie jurisdictionL=Kraków serialNumber=0000594747 C=PL ST=małopolskie L=Kraków postalCode=30-727 street=Pana Tadeusza 2 O=nazwa.pl sp. z o.o. CN=nazwa.pl
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum EV TLS G2 E39 CA
Valid from
2026-03-04T10:39:32+00:00
Expires
2027-03-04T10:39:31+00:00
Days remaining
118
Serial (hex)
0CAEB0E89DFA790F2D66A0282D11386A
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

DNS:nazwa.pl, DNS:www.nazwa.pl

SHA-256 fingerprint

04:75:75:B4:7C:74:8D:D8:F7:7A:F1:83:5A:2A:EE:79:F4:B9:77:4C:D6:81:F5:26:CC:C7:D1:60:D2:17:22:D7
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://certumevtlsg2e39ca.crl.certum.pl/certumevtlsg2e39ca.crl
authorityInfoAccess
OCSP - URI:http://certumevtlsg2e39ca.ocsp-certum.com CA Issuers - URI:http://certumevtlsg2e39ca.repository.certum.pl/certumevtlsg2e39ca.cer
authorityKeyIdentifier
3F:B6:01:75:5A:20:F8:D1:B0:26:94:78:DC:A9:8C:D1:69:0C:D7:B3
certificatePolicies
Policy: 2.23.140.1.1 Policy: 1.2.616.1.113527.2.101.3
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature
subjectAltName
DNS:nazwa.pl, DNS:www.nazwa.pl
ct_precert_scts
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 : Mar 4 10:39:33.296 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:04:3E:A9:8B:85:BC:F2:1A:DE:30:CA:15: 6A:0D:EA:20:05:BB:CC:C6:43:96:A5:2F:6C:A0:75:FF: A7:51:8C:51:02:20:2B:A4:C9:BA:13:40:C4:85:50:F4: A8:31:17:45:7F:BA:B5:2B:D1:DB:6E:C7:42:61:F9:44: FF:20:0A:05:9D:85 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 : Mar 4 10:39:33.594 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:C3:18:85:54:50:11:35:03:6C:51:75: 18:DE:8D:C7:9E:67:43:D3:92:CF:3C:50:63:75:C3:86: 43:CD:97:85:0B:02:20:5D:F7:C0:DE:24:88:48:FD:B6: 70:2C:9B:4A:FF:14:B6:8E:7E:0B:98:2B:69:1E:17:E8: D6:D8:B1:3A:AE:86:15 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 : Mar 4 10:39:33.604 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:74:87:AC:EE:FD:47:80:78:91:AF:79:AA: 44:A8:70:C2:91:A6:19:DF:8E:11:71:AC:E6:80:A0:2E: 22:0F:0D:DE:02:20:6C:FA:A7:8D:BA:49:58:BA:6B:F8: 21:DF:9B:DD:18:87:84:1B:FB:FE:2A:A8:49:C4:EB:7C: B1:60:83:75:D8:BF
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-06T02:41:12+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=PL O=Asseco Data Systems S.A. CN=Certum EV TLS G2 E39 CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum EC-384 CA
Valid from
2024-06-18T07:51:55+00:00
Expires
2039-06-05T07:51:55+00:00
Days remaining
4594
Serial (hex)
29B6454D5DA249033BB37AA53717B743
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

3B:28:12:1D:89:85:E2:DA:DF:20:29:C5:3F:23:20:07:F0:C1:9E:C7:88:65:4B:2C:2B:AA:EB:E5:04:19:B0:D5
Certificate extensions & PEM
authorityInfoAccess
CA Issuers - URI:http://subca.repository.certum.pl/cec384ca.cer OCSP - URI:http://subca.ocsp-certum.com
authorityKeyIdentifier
8D:06:66:74:24:76:3A:F3:89:F7:BC:D6:BD:47:7D:2F:BC:10:5F:4B
basicConstraints
CA:TRUE, pathlen:0
crlDistributionPoints
Full Name: URI:http://subca.crl.certum.pl/cec384ca.crl
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
keyUsage
Certificate Sign, CRL Sign
certificatePolicies
Policy: X509v3 Any Policy
subjectKeyIdentifier
3F:B6:01:75:5A:20:F8:D1:B0:26:94:78:DC:A9:8C:D1:69:0C:D7:B3
-----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 EC-384 CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum EC-384 CA
Valid from
2018-03-26T07:24:54+00:00
Expires
2043-03-26T07:24:54+00:00
Days remaining
5984
Serial (hex)
788F275C81125220A504D02DDDBA73F4
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

6B:32:80:85:62:53:18:AA:50:D1:73:C9:8D:8B:DA:09:D5:7E:27:41:3D:11:4C:F7:87:A0:F5:D0:6C:03:0C:F6
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
8D:06:66:74:24:76:3A:F3:89:F7:BC:D6:BD:47:7D:2F:BC:10:5F:4B
keyUsage
Certificate Sign, CRL Sign
-----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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