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

mail.internal.onelayer.eu · 146.255.59.108:443

Verified

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

Subject
CN=mail.internal.onelayer.eu
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-09-03T09:23:14+00:00
Expires
2026-12-02T09:23:13+00:00
Days remaining
45
Serial (hex)
0557D4D83846ABF33296BD71D6B54EF2D0D5
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.cavaliere-von-der-kleeblattwiese.at, DNS:autoconfig.linqix.net, DNS:autoconfig.lp-holding.at, DNS:autoconfig.onelayer.at, DNS:autodiscover.cavaliere-von-der-kleeblattwiese.at, DNS:autodiscover.linqix.net, DNS:autodiscover.lp-holding.at, DNS:autodiscover.onelayer.at, DNS:mail.internal.onelayer.eu

SHA-256 fingerprint

92:A5:59:96:DF:BC:F3:CE:DF:36:A6:BB:2C:15:93:5C:9C:20:C4:94:07:64:F6:2B:9F:D9:2C:64:A9:26:7A:C6
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
AC:CF:94:3C:8B:4D:1F:31:AF:6B:57:A0:4A:FC:54:24:E7:FA:3D:9F
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:autoconfig.cavaliere-von-der-kleeblattwiese.at, DNS:autoconfig.linqix.net, DNS:autoconfig.lp-holding.at, DNS:autoconfig.onelayer.at, DNS:autodiscover.cavaliere-von-der-kleeblattwiese.at, DNS:autodiscover.linqix.net, DNS:autodiscover.lp-holding.at, DNS:autodiscover.onelayer.at, DNS:mail.internal.onelayer.eu
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/86.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E: F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7 Timestamp : Sep 3 10:21:44.966 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:AC:D2:0F:18:74:8B:77:2D:2E:5D:BA: 6A:59:BF:B9:FC:CC:77:06:F9:9F:7F:BC:C0:94:92:C9: CA:9B:50:1D:B6:02:20:2A:89:3A:C7:35:26:C5:25:79: 2F:E0:4F:E5:F9:4D:AA:70:63:87:11:DF:01:F2:99:90: 5F:CC:19:3D:AC:E3:D6 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86: D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF Timestamp : Sep 3 10:21:45.363 2026 GMT Extensions: 00:00:05:00:3B:ED:D6:0F Signature : ecdsa-with-SHA256 30:45:02:20:49:FC:FF:B0:06:21:4E:80:2E:8F:1E:6D: 16:CB:82:7B:C5:79:0F:CE:78:34:8B:1B:54:73:AC:81: 22:0C:6C:13:02:21:00:AA:DC:61:F3:0E:40:83:F2:AD: E1:60:E8:94:4D:A9:78:B9:A2:90:FB:F0:88:4F:AF:CB: 67:C3:9B:2B:16:66:21
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-17T18:14:52+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
686
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
2147
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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