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

red.es · 45.223.161.253:443

Verified

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

Subject
CN=red.es
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Valid from
2026-09-16T16:11:20+00:00
Expires
2027-04-03T16:11:19+00:00
Days remaining
193
Serial (hex)
2E7CF6A67F9CE77920320ECE280EF24F
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:red.es, DNS:www.red.es

SHA-256 fingerprint

93:6C:42:0E:7E:14:FD:1B:9A:5C:DC:FD:0C:48:6E:D7:5B:5E:66:8D:CD:63:A1:2E:B5:B2:5D:7D:3F:75:34:8A
Certificate extensions & PEM
authorityKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-GEANT-TLS-R1.cer
subjectAltName
DNS:red.es, DNS:www.red.es
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 0.4.0.2042.1.6 Policy: 1.3.6.1.4.1.26513.1.1.1.1
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-GEANT-TLS-R1.crl
subjectKeyIdentifier
71:19:5B:92:EE:AA:33:F1:02:14:98:86:66:E2:BD:2B:97:C9:55:7E
keyUsage
Digital Signature, Key Encipherment
ct_precert_scts
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 : Sep 16 16:21:22.185 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:4A:16:AC:AD:E3:32:8E:B0:F8:06:B7:EB: F3:E4:2D:6B:C9:9F:05:56:B8:DC:0D:AF:C5:B2:14:C7: D4:AB:71:75:02:20:35:AC:50:2F:10:09:69:97:1B:0F: AA:C2:26:23:ED:09:B0:7F:E7:F7:85:76:F7:15:71:79: 65:61:E6:CB:1A:31 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 : Sep 16 16:21:22.157 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:7E:1D:7A:5C:E6:3C:44:63:EA:FA:58:40: C2:DE:4E:0D:F6:AD:3E:2D:A2:66:63:26:2D:A1:C1:42: 04:39:D2:63:02:21:00:AB:35:00:75:B1:88:7A:59:EA: 0C:A5:DE:50:1F:FA:78:B1:BB:42:0E:E4:44:0C:5A:EE: AB:68:79:9F:93:59:9E 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 : Sep 16 16:21:22.111 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:15:60:BD:61:36:4D:82:59:C2:BD:9B:14: 94:2A:AC:BD:D4:3A:74:0B:A0:E6:E0:4F:C7:92:34:6D: A1:39:6B:43:02:20:61:21:93:12:D5:BD:89:25:17:0F: FC:F3:71:BC:D6:20:C2:9F:18:CC:24:68:80:3A:7B:18: 2C:DB:24:29:6F:5C
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-22T14:48:05+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS RSA Root CA 2021
Valid from
2025-01-03T11:15:00+00:00
Expires
2039-12-31T11:14:59+00:00
Days remaining
4847
Serial (hex)
14D57BF3692228219A5567FA91651B22
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

5B:67:8D:C4:40:95:A5:28:95:B6:3B:31:F2:72:27:F4:B3:6C:3E:34:74:91:BF:2B:FA:69:18:37:A5:FB:8C:79
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
authorityKeyIdentifier
0A:48:23:A6:60:A4:92:0A:33:EA:93:5B:C5:57:EA:25:4D:BD:12:EE
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-TLS-Root-2021-RSA.cer
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-TLS-Root-2021-RSA.crl
subjectKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS RSA Root CA 2021
Issuer
C=GR L=Athens O=Hellenic Academic and Research Institutions Cert. Authority CN=Hellenic Academic and Research Institutions RootCA 2015
Valid from
2021-09-02T07:41:55+00:00
Expires
2029-08-31T07:41:54+00:00
Days remaining
1073
Serial (hex)
2A6086D4D4DE45C95E4B98FBBF2FBF26
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

4A:CD:8D:C6:02:0A:54:5A:85:89:43:A5:53:B5:E0:F3:FC:5B:85:9A:EA:17:46:65:0D:69:CF:12:10:F9:56:D8
Certificate extensions & PEM
basicConstraints
CA:TRUE
authorityKeyIdentifier
71:15:67:C8:C8:C9:BD:75:5D:72:D0:38:18:6A:9D:F3:71:24:54:0B
authorityInfoAccess
CA Issuers - URI:http://repo.harica.gr/certs/HaricaRootCA2015.crt
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HaricaRootCA2015.crl
subjectKeyIdentifier
0A:48:23:A6:60:A4:92:0A:33:EA:93:5B:C5:57:EA:25:4D:BD:12:EE
keyUsage
Digital Signature, 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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