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

copernica.com · 185.131.27.2:443

Verified

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

Subject
CN=copernica.com
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-08-20T02:20:21+00:00
Expires
2026-11-18T02:20:20+00:00
Days remaining
49
Serial (hex)
05F160FFB6A3B5C181B5ECD8790DAE3AC68E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:copernica.asia, DNS:copernica.at, DNS:copernica.be, DNS:copernica.biz, DNS:copernica.com, DNS:copernica.cz, DNS:copernica.es, DNS:copernica.fr, DNS:copernica.gr, DNS:copernica.in, DNS:copernica.info, DNS:copernica.it, DNS:copernica.jp, DNS:copernica.nl, DNS:copernica.org, DNS:copernica.ph, DNS:copernica.pl, DNS:copernica.ru, DNS:copernica.se

SHA-256 fingerprint

B1:7A:F2:11:89:B3:95:16:3B:0E:F8:6C:1F:1A:B4:D7:00:DB:49:6F:F8:61:BB:41:4C:D8:58:F2:1E:98:57:E0
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
C9:2D:2A:73:12:96:89:48:EC:21:9C:56:A1:69:44:80:F6:A3:48:49
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:copernica.asia, DNS:copernica.at, DNS:copernica.be, DNS:copernica.biz, DNS:copernica.com, DNS:copernica.cz, DNS:copernica.es, DNS:copernica.fr, DNS:copernica.gr, DNS:copernica.in, DNS:copernica.info, DNS:copernica.it, DNS:copernica.jp, DNS:copernica.nl, DNS:copernica.org, DNS:copernica.ph, DNS:copernica.pl, DNS:copernica.ru, DNS:copernica.se
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/15.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C8:A3:C4:7F:C7:B3:AD:B9:35:6B:01:3F:6A:7A:12:6D: E3:3A:4E:43:A5:C6:46:F9:97:AD:39:75:99:1D:CF:9A Timestamp : Aug 20 03:18:52.090 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:98:DC:84:21:63:14:43:5D:31:C3:6E: 0B:45:4A:75:32:84:E9:5B:36:30:0D:96:CA:DC:CD:81: 54:44:D7:76:40:02:20:47:7F:33:39:F7:12:65:00:89: CB:2D:A7:88:67:59:DC:40:85:CE:8E:49:4D:38:E1:E8: 72:3E:78:D8:09:D8:B7 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A8:26:CB:E3:0A:C6:35:12:46:53:3F:E0:65:F1:4F:19: D9:6E:19:08:13:C4:1D:D9:6D:79:00:B3:12:3C:55:27 Timestamp : Aug 20 03:18:52.692 2026 GMT Extensions: 00:00:05:00:1E:D2:D9:98 Signature : ecdsa-with-SHA256 30:45:02:20:45:73:05:45:6E:CA:23:CD:8D:14:56:AE: CB:B4:53:BB:C6:5D:81:7D:01:2E:F9:17:77:91:54:D8: AE:DC:B0:1C:02:21:00:E3:41:2A:E7:31:AE:64:1C:E5: 65:39:84:56:99:FB:AD:DA:2E:76:DA:14:0F:6E:49:24: 7A:2C:05:58:0B:05:ED
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-29T13:33:12+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
704
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
2165
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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