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

red.gob.es · 2001:67c:21cc:313::11:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`sede.red.gob.es' did not match expected CN=`red.gob.es'

Certificate verification failed

Subject
CN=sede.red.gob.es
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Valid from
2026-07-22T20:57:31+00:00
Expires
2027-02-06T20:57:30+00:00
Days remaining
136
Serial (hex)
2090F1F6060AB6F742191612D5B6975A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:sede.red.gob.es, DNS:www.sede.red.gob.es

SHA-256 fingerprint

7B:74:FF:A9:60:07:22:DA:1F:1B:F5:35:78:BF:A5:A5:27:26:5E:F4:88:C1:78:0E:85:18:B4:FF:16:80:B4:C9
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:sede.red.gob.es, DNS:www.sede.red.gob.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
08:06:79:FE:02:F6:2F:66:03:64:67:75:1F:F6:9B:9F:38:7C:51:D7
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 : Jul 22 21:07:37.040 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:9F:25:64:6F:42:A3:7A:00:48:6F:21: C3:E0:12:E8:7E:84:EA:6D:8F:65:B7:BC:33:4F:42:09: 21:4A:88:80:F7:02:21:00:9B:03:A7:D5:B6:C1:74:AD: FA:C8:1B:6E:F0:C9:94:3D:6E:B6:EB:22:7E:42:0B:A4: 07:A4:78:4A:27:C0:22:32 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 : Jul 22 21:07:37.070 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:3D:46:BE:D6:3A:0A:53:E9:6E:09:94:80: 4B:7E:EF:8E:B5:EF:11:E3:86:24:53:CD:99:92:EF:35: F8:80:17:A0:02:20:03:6F:39:FA:91:71:32:EC:EC:65: 3A:54:20:31:08:E7:72:EF:CA:99:00:D3:30:70:CD:A8: BC:E6:07:9B:68:ED 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 : Jul 22 21:07:37.018 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:2F:2B:9C:9E:69:2D:D8:15:70:A2:39:47: DC:80:E2:AD:74:4D:E8:AA:73:A3:34:C7:7E:1C:28:93: AE:7B:AE:FA:02:20:3A:C3:30:88:5C:2F:9A:2E:2E:70: 86:D4:89:B9:4E:83:1D:CB:42:8B:A5:66:25:73:72:2F: BF:90:42:37:45:CC
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-09-23T18:33:30+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
4846
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
1072
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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