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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

TLSv1.2

proximus.lu · 212.66.67.53:443

Verified

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

Subject
C=LU ST=Luxembourg L=Bertrange O=Proximus Luxembourg S.A. CN=*.proximus.lu
Issuer
C=BE O=GlobalSign nv-sa CN=GlobalSign RSA OV SSL CA 2018
Valid from
2026-05-06T14:24:15+00:00
Expires
2026-11-21T14:24:15+00:00
Days remaining
47
Serial (hex)
4C5040B2CF524C99572F5118
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.proximus.lu, DNS:proximus.lu

SHA-256 fingerprint

E8:6E:8C:5C:5B:9F:CE:15:10:EB:21:5A:FB:EA:16:3F:53:FB:A5:53:56:1D:BB:67:C0:CD:76:2D:B1:4B:5E:D7
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
authorityInfoAccess
CA Issuers - URI:http://secure.globalsign.com/cacert/gsrsaovsslca2018.crt OCSP - URI:http://ocsp.globalsign.com/gsrsaovsslca2018
certificatePolicies
Policy: 1.3.6.1.4.1.4146.1.20 CPS: https://www.globalsign.com/repository/ Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/gsrsaovsslca2018.crl
subjectAltName
DNS:*.proximus.lu, DNS:proximus.lu
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
authorityKeyIdentifier
F8:EF:7F:F2:CD:78:67:A8:DE:6F:8F:24:8D:88:F1:87:03:02:B3:EB
subjectKeyIdentifier
3E:68:83:55:0B:35:08:8C:AF:2F:68:3C:D6:F8:8D:03:60:E5:AC:45
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E: F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7 Timestamp : May 6 14:24:18.009 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:C7:1F:69:13:C9:DB:64:78:2A:82:0D: B2:12:04:98:15:A6:BD:97:9C:73:A5:DE:ED:6F:11:8F: 40:74:54:FB:6C:02:21:00:92:C4:24:F3:7C:3A:DD:27: A2:C1:2F:3B:60:37:59:AC:32:78:4B:A3:67:D7:6A:3F: BD:B2:30:EF:24:94:F1:B9 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : May 6 14:24:17.884 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:85:C9:9C:6A:0A:BB:A5:BD:16:35:CB: 44:BE:9A:0B:DB:AC:D0:5C:D1:52:41:52:52:7A:F5:B3: E2:61:61:9B:D4:02:21:00:C5:5A:AD:E4:6E:44:D1:98: CB:7C:6C:FF:08:83:9F:AD:41:E7:B6:BA:F3:22:F2:C1: 11:C0:26:56:71:5E:C8:AC Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : May 6 14:24:17.964 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:FD:45:E2:3E:D4:88:3F:69:91:46:E9: 31:E0:C2:91:5A:A2:ED:9A:5C:F7:57:6D:69:8B:87:EE: CA:3B:59:B8:B8:02:21:00:E6:73:FC:45:58:31:28:E9: A7:88:FF:67:74:30:C6:BB:6B:0B:5B:B4:25:DA:5D:B9: 04:9C:03:40:A3:08:0E:BD
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-05T07:00:59+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=BE O=GlobalSign nv-sa CN=GlobalSign RSA OV SSL CA 2018
Issuer
OU=GlobalSign Root CA - R3 O=GlobalSign CN=GlobalSign
Valid from
2018-11-21T00:00:00+00:00
Expires
2028-11-21T00:00:00+00:00
Days remaining
777
Serial (hex)
01EE5F221DFC623BD4333A8557
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

B6:76:FF:A3:17:9E:88:12:09:3A:1B:5E:AF:EE:87:6A:E7:A6:AA:F2:31:07:8D:AD:1B:FB:21:CD:28:93:76:4A
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
F8:EF:7F:F2:CD:78:67:A8:DE:6F:8F:24:8D:88:F1:87:03:02:B3:EB
authorityKeyIdentifier
8F:F0:4B:7F:A8:2E:45:24:AE:4D:50:FA:63:9A:8B:DE:E2:DD:1B:BC
authorityInfoAccess
OCSP - URI:http://ocsp2.globalsign.com/rootr3
crlDistributionPoints
Full Name: URI:http://crl.globalsign.com/root-r3.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.globalsign.com/repository/
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
OU=GlobalSign Root CA - R3 O=GlobalSign CN=GlobalSign
Issuer
OU=GlobalSign Root CA - R3 O=GlobalSign CN=GlobalSign
Valid from
2009-03-18T10:00:00+00:00
Expires
2029-03-18T10:00:00+00:00
Days remaining
895
Serial (hex)
04000000000121585308A2
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CB:B5:22:D7:B7:F1:27:AD:6A:01:13:86:5B:DF:1C:D4:10:2E:7D:07:59:AF:63:5A:7C:F4:72:0D:C9:63:C5:3B
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
subjectKeyIdentifier
8F:F0:4B:7F:A8:2E:45:24:AE:4D:50:FA:63:9A:8B:DE:E2:DD:1B:BC
-----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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