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

ns2.g00net.org · 194.12.235.18:443

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=gas.heros-bg.net
Issuer
C=AT O=ZeroSSL CN=ZeroSSL RSA Domain Secure Site CA
Valid from
2022-05-30T00:00:00+00:00
Expires
2022-08-28T23:59:59+00:00
Days remaining
-1528
Serial (hex)
93753DA3C432843F4B105E3E226E087F
Signature
RSA-SHA384
Public key
RSA 2048

Subject alternative names (SAN)

DNS:gas.heros-bg.net

SHA-256 fingerprint

1D:2C:11:CA:27:7A:45:32:4C:21:B3:AA:29:2C:16:89:B2:A1:84:F0:AE:24:58:34:20:DB:C9:B0:61:C0:3E:90
Certificate extensions & PEM
authorityKeyIdentifier
C8:D9:78:68:A2:D9:19:68:D5:3D:72:DE:5F:0A:3E:DC:B5:86:86:A6
subjectKeyIdentifier
D7:1D:B3:CD:49:B4:EE:8A:4B:02:EE:42:CC:2A:9F:F1:2C:2D:03:80
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.2.78 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://zerossl.crt.sectigo.com/ZeroSSLRSADomainSecureSiteCA.crt OCSP - URI:http://zerossl.ocsp.sectigo.com
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 : May 30 15:30:17.194 2022 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:15:DC:90:12:EF:D4:8A:B4:43:C8:B9:18: 32:2D:A0:7A:67:29:DD:0D:27:60:09:41:84:66:1D:B5: 53:33:BF:31:02:20:6C:1F:4A:4D:86:76:49:69:B8:0A: 6F:EA:E2:9B:AD:A8:DC:99:EC:3C:15:7A:2F:5C:82:64: B5:34:7F:24:99:82 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 : May 30 15:30:17.238 2022 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:5B:17:E1:57:CE:70:C3:E7:A3:78:2F:E8: 0A:88:1E:54:B4:5F:9F:BF:DA:4A:0C:82:F0:E8:EC:19: 55:CC:FD:7F:02:21:00:95:EC:6D:5C:DE:EF:EF:BC:80: 02:76:8F:6A:DD:97:96:A6:FD:49:81:CD:2A:97:FA:B7: 9A:E1:E8:68:12:9E:C9
subjectAltName
DNS:gas.heros-bg.net
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-03T03:45:49+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=AT O=ZeroSSL CN=ZeroSSL RSA Domain Secure Site CA
Issuer
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust RSA Certification Authority
Valid from
2020-01-30T00:00:00+00:00
Expires
2030-01-29T23:59:59+00:00
Days remaining
1183
Serial (hex)
6C55ABDBD00792C79D070CD8119ED6BF
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

21:AC:C1:DB:D6:94:4F:9A:C1:8C:78:2C:B5:C3:28:D6:C2:82:1C:6B:63:73:1F:A3:B8:98:7F:56:25:DE:8A:0D
Certificate extensions & PEM
authorityKeyIdentifier
53:79:BF:5A:AA:2B:4A:CF:54:80:E1:D8:9B:C0:9D:F2:B2:03:66:CB
subjectKeyIdentifier
C8:D9:78:68:A2:D9:19:68:D5:3D:72:DE:5F:0A:3E:DC:B5:86:86:A6
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.2.78 Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://crl.usertrust.com/USERTrustRSACertificationAuthority.crl
authorityInfoAccess
CA Issuers - URI:http://crt.usertrust.com/USERTrustRSAAddTrustCA.crt OCSP - URI:http://ocsp.usertrust.com
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust RSA Certification Authority
Issuer
C=GB ST=Greater Manchester L=Salford O=Comodo CA Limited CN=AAA Certificate Services
Valid from
2019-03-12T00:00:00+00:00
Expires
2028-12-31T23:59:59+00:00
Days remaining
789
Serial (hex)
3972443AF922B751D7D36C10DD313595
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

68:B9:C7:61:21:9A:5B:1F:01:31:78:44:74:66:5D:B6:1B:BD:B1:09:E0:0F:05:CA:9F:74:24:4E:E5:F5:F5:2B
Certificate extensions & PEM
authorityKeyIdentifier
A0:11:0A:23:3E:96:F1:07:EC:E2:AF:29:EF:82:A5:7F:D0:30:A4:B4
subjectKeyIdentifier
53:79:BF:5A:AA:2B:4A:CF:54:80:E1:D8:9B:C0:9D:F2:B2:03:66:CB
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
certificatePolicies
Policy: X509v3 Any Policy
crlDistributionPoints
Full Name: URI:http://crl.comodoca.com/AAACertificateServices.crl
authorityInfoAccess
OCSP - URI:http://ocsp.comodoca.com
-----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 →