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

relay2.adamant.net · 212.26.128.2:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed
The certificate has expired.

Certificate verification failed

Subject
CN=adamant.net
Issuer
C=US O=Let's Encrypt CN=R3
Valid from
2022-08-24T12:18:03+00:00
Expires
2022-11-22T12:18:02+00:00
Days remaining
-1445
Serial (hex)
03D598926C12C7A6B894E7C1ADBA71E86CFB
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.adamant.net, DNS:*.local.adamant.net, DNS:adamant.net

SHA-256 fingerprint

01:21:DA:EC:98:3B:0E:5D:52:7D:F8:3B:85:A2:46:08:0F:67:71:D7:92:DB:AB:E8:C2:BD:C8:91:A6:DC:85:81
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
84:A1:63:FD:AD:4B:65:99:17:AC:DE:E8:8E:21:84:60:8C:D1:06:07
authorityKeyIdentifier
14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
authorityInfoAccess
OCSP - URI:http://r3.o.lencr.org CA Issuers - URI:http://r3.i.lencr.org/
subjectAltName
DNS:*.adamant.net, DNS:*.local.adamant.net, DNS:adamant.net
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.44947.1.1.1 CPS: http://cps.letsencrypt.org
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:A5:55:EB:75:FA:91:20:30:B5:A2:89:69:F4:F3:7D: 11:2C:41:74:BE:FD:49:B8:85:AB:F2:FC:70:FE:6D:47 Timestamp : Aug 24 13:18:03.834 2022 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:44:68:23:CA:9F:D4:A1:A0:48:F4:2D:09: 87:C3:CA:29:36:D4:43:A7:E3:61:DD:49:E4:64:50:32: 38:20:CC:E3:02:21:00:CA:20:2F:A6:93:03:61:38:E4: 0B:60:6C:1D:D0:98:E7:95:C4:01:F8:B1:17:6F:3F:CF: 26:88:BA:F8:19:63:61 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 41:C8:CA:B1:DF:22:46:4A:10:C6:A1:3A:09:42:87:5E: 4E:31:8B:1B:03:EB:EB:4B:C7:68:F0:90:62:96:06:F6 Timestamp : Aug 24 13:18:04.302 2022 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:A7:A1:F7:8A:AB:B5:D3:1A:78:D5:E2: 70:12:1F:18:53:1B:CA:AE:A6:E5:6D:C4:23:8B:22:C0: A7:20:E2:C0:F9:02:21:00:F6:75:63:6F:BE:01:29:77: 6C:43:9B:2F:06:CF:B3:20:81:E4:51:10:4F:F6:65:C2: 48:D0:D4:31:A4:63:5F:E6
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-11-06T08:27:18+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R3
Issuer
O=Digital Signature Trust Co. CN=DST Root CA X3
Valid from
2020-10-07T19:21:40+00:00
Expires
2021-09-29T19:21:40+00:00
Days remaining
-1864
Serial (hex)
400175048314A4C8218C84A90C16CDDF
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

73:0C:1B:DC:D8:5F:57:CE:5D:C0:BB:A7:33:E5:F1:BA:5A:92:5B:2A:77:1D:64:0A:26:F7:A4:54:22:4D:AD:3B
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
keyUsage
Digital Signature, Certificate Sign, CRL Sign
authorityInfoAccess
CA Issuers - URI:http://apps.identrust.com/roots/dstrootcax3.p7c
authorityKeyIdentifier
C4:A7:B1:A4:7B:2C:71:FA:DB:E1:4B:90:75:FF:C4:15:60:85:89:10
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.44947.1.1.1 CPS: http://cps.root-x1.letsencrypt.org
crlDistributionPoints
Full Name: URI:http://crl.identrust.com/DSTROOTCAX3CRL.crl
subjectKeyIdentifier
14:2E:B3:17:B7:58:56:CB:AE:50:09:40:E6:1F:AF:9D:8B:14:C2:C6
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
-----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

Registration / WHOIS →DNS records →