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

fbsd.at · 213.208.144.22:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`mail.fbsd.at' did not match expected CN=`fbsd.at'

Certificate verification failed

Subject
CN=mail.fbsd.at
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-09-07T01:04:26+00:00
Expires
2026-12-06T01:04:25+00:00
Days remaining
71
Serial (hex)
0600A4C84378E30260CB946AFBF37024A5DD
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.brainless.at, DNS:autoconfig.fbsd.host, DNS:autoconfig.gogler.at, DNS:autoconfig.gogler.org, DNS:autoconfig.hated.at, DNS:autodiscover.brainless.at, DNS:autodiscover.fbsd.host, DNS:autodiscover.gogler.org, DNS:autodiscover.hated.at, DNS:autodiscover.kose.at, DNS:mail.fbsd.at

SHA-256 fingerprint

96:15:77:65:8E:55:3E:6C:B6:FE:20:62:F2:A0:17:BD:BB:6A:BF:9F:C4:B9:96:4A:6B:86:CB:47:58:B2:7D:1D
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
14:E3:72:8F:02:6B:D5:26:CC:37:C7:41:13:8B:9A:24:BD:1B:79:26
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:autoconfig.brainless.at, DNS:autoconfig.fbsd.host, DNS:autoconfig.gogler.at, DNS:autoconfig.gogler.org, DNS:autoconfig.hated.at, DNS:autodiscover.brainless.at, DNS:autodiscover.fbsd.host, DNS:autodiscover.gogler.org, DNS:autodiscover.hated.at, DNS:autodiscover.kose.at, DNS:mail.fbsd.at
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/94.crl
ct_precert_scts
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 7 02:02:56.373 2026 GMT Extensions: 00:00:05:00:3D:5F:1A:0D Signature : ecdsa-with-SHA256 30:46:02:21:00:EF:B7:8D:75:3A:B2:32:2F:0F:5A:1C: E9:D1:1A:BB:30:DA:43:64:A0:E7:F4:DE:E7:B3:BF:4B: B1:ED:56:2B:A2:02:21:00:A4:1E:63:95:88:EC:3F:D9: 66:AB:DF:CD:98:26:13:AF:96:26:23:6C:65:DE:9F:66: 77:D5:AF:CD:E2:EC:1E:FC Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Sep 7 02:03:00.265 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:C6:24:96:6F:AE:74:63:BD:D9:FC:C7: 7B:5C:27:9A:94:72:D3:71:D3:44:AD:5E:D9:B9:0B:C7: 1C:07:4F:C8:3C:02:21:00:F4:17:1E:28:81:0C:1A:99: 4E:68:41:3C:BC:65:62:24:50:7A:D1:99:60:8D:2E:27: 2C:28:A0:37:22:42:5C:CA
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-25T08:58:31+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
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
708
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
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
2169
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-----
MIIF9DCCA9ygAwIBAgIRAPJLbRf52a18scn+p4eCaZ8wDQYJKoZIhvcNAQELBQAw
TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMjYwNTEzMDAwMDAw
WhcNMzIwOTAyMjM1OTU5WjAuMQswCQYDVQQGEwJVUzENMAsGA1UEChMESVNSRzEQ
MA4GA1UEAxMHUm9vdCBZUjCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIB
ANvGJnN78CTJdWL3+eGfsLN5TrNBJs+VH9hRXqRbwxu9sGNiB0BD1fcOxbSUQCJI
M1xE13Db+5Cw1w0s0EBYsvuIP/6joF0w8cuImbgR1OGgYbSQ4OpzI+DG8SGuTlcE
873OCS+kh3srlo6vl43M5OJg4Aeo1sfHp6kTJDoIiFBNJAY+OKfX/FUvYKuhjT+n
o49lmqmupSBI5PkBQiqrEGtWU5uxU/cQWHGu8jSjFBznZqvbNPLMXMLFxCb3WTfr
JBXXjqvWG+v4bjzxjjeAtOlU7qarRDvNOyAuQYLln904M+faKx8hnLCpJ15ZqaEg
cNlY+9MMWcC5yvL2A2j3l9+2buggZX+dOE91zYmIdawTvSZuVvlbRrAlLxIB6pwM
BjneXCjYQ8+3BCCjssbSNpZU3hTcBDdhfAlEDlYr6pEatnMdmDT5BqnKC92bd0Eh
M1fbLHioLccLCuievT8ZkPhZrq7Mii7gNXAcUEAR8+lzYal+9zTg7C5DALyVOeG/
CqfRAMn1KSHCR0NSA6P8tn/mGRlnCct5rtVCLnVySVpU6H1qGg3DgTOuskf8eahT
MiYbI5ezPJmO5ertalskQ1utp74+eDy92PI4ftHKTbq9IWhH4YZKh3WnJEIt+oQv
lYZbY8tpEroKrFB6PFGzrJIDRyts4HqvuH52RFj2zv/BAgMBAAGjgeswgegwDgYD
VR0PAQH/BAQDAgEGMBMGA1UdJQQMMAoGCCsGAQUFBwMBMA8GA1UdEwEB/wQFMAMB
Af8wHQYDVR0OBBYEFN7nW2DQIm1AKH0/DQH+pLVStFGUMB8GA1UdIwQYMBaAFHm0
WeZ7tuXkAXOACIjIGlj26ZtuMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcwAoYW
aHR0cDovL3gxLmkubGVuY3Iub3JnLzATBgNVHSAEDDAKMAgGBmeBDAECATAnBgNV
HR8EIDAeMBygGqAYhhZodHRwOi8veDEuYy5sZW5jci5vcmcvMA0GCSqGSIb3DQEB
CwUAA4ICAQA8spSI95KKfn2W6GMmDpHBJSPaLbsS3W93cijJCRCYAc1fsJgL1FIL
7C0C9ecPOdcwB2fi0Dk2p94j9iTJCxmt5CFSKLRWwnXT2MMSXexVxqoVB79BdWPx
VXETkVme/qYSAuKVHh5Ps+5BixgmwS1JkjSAc+MfrUbNssVEEnH0aEiAh+rotXAV
JSP/Ye7LJPEwD9DWG72vVWbhAcuOf5OLjz57Ctk7MgQHynZ7+PlHJtajroCaIbtC
r6tcZZaAwUQm+jQyeWdV+2hv9deOYFmKeQyjjcSrN5Nadrw+L9DZJLbA1HqeNvLh
BgqpP0fvJq2N6EtD574N6eMI7uMsJTnji2UDz9el5XLSv9fqJMuDQtYVb2oTNoKp
oUqhxPVC0aq4eG5MESaIdn8b5ZGSSeAJLMHXljEdlNza+ncfkviXk1POLnnFdvx8
/gk6M374WbLWFXw8N141B/Rl/tINGfl1TxOIiqtiMYkL02RSGb1kq34BL9NPP27z
RGMuHGnzS3hFIrRTfKxrzUZ9RzQWzEG3K6fJ3r2nqSltkeytis9DIBoFY9VmVyjL
M71DMi+y1+TRSJVClEMwvA4yL++7q9XZx5r5wBRWB4kQTKH5qyoZnDw7iiuh1lID
yDFx8r7i9vIJU5HS3moZLkYWAOilMaV9N56A9Bgb6dNcHkvg3NoaYA==
-----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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