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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

ufrj.br · 200.156.137.16:443

Verified

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

Subject
CN=ufrj.br
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-22T20:40:28+00:00
Expires
2027-01-20T20:40:27+00:00
Days remaining
76
Serial (hex)
059E30D7D4920EC846129011A9622FDCA179
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:ufrj.br, DNS:www.ufrj.br

SHA-256 fingerprint

6E:5E:3E:33:B0:02:44:7B:B2:3E:8F:13:F8:E5:44:70:88:09:96:9C:F3:92:E8:56:8C:46:2B:90:3B:0B:EA:A3
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
FF:B8:B8:F7:E3:FA:68:D0:3A:EE:69:9B:CA:93:61:FB:35:50:5B:F8
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:ufrj.br, DNS:www.ufrj.br
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/122.crl
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 : Oct 22 21:38:58.303 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:15:3A:5F:25:76:07:CD:4E:E2:2F:A4:69: 31:FF:58:FF:E3:9E:42:0D:D2:DE:57:0B:B1:46:F4:B5: AF:3C:47:71:02:21:00:D5:A4:BD:D3:F0:81:CA:BE:35: 5A:B8:2B:47:2F:BF:B7:A3:33:7D:96:E7:8B:4E:65:FF: B6:36:77:6E:2B:42:B1 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A2:81:00:18:73:4E:17:6E:1D:47:E0:95:40:F3:81:BA: 54:66:97:CD:63:A8:43:50:71:6E:B8:09:4E:DA:F1:0D Timestamp : Oct 22 21:38:59.087 2026 GMT Extensions: 00:00:05:00:2B:60:61:9A Signature : ecdsa-with-SHA256 30:45:02:20:03:3C:61:1E:A0:D7:32:43:16:EA:E4:8D: D3:19:60:EC:45:D5:74:CF:98:D8:1E:D3:2F:2A:8B:75: 09:11:D5:1A:02:21:00:C4:59:B8:21:B1:9B:D7:6A:05: 84:13:19:10:0F:0F:09:37:AD:84:22:26:88:40:6E:F3: 7A:04:08:A3:3E:05:35
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-05T06:47:59+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
667
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2128
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/ 
-----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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