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 subjectAltName did not match expected name `fbsd.at'

Certificate verification failed

Subject
CN=mail.fbsd.at
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-11-06T02:05:23+00:00
Expires
2027-02-04T02:05:22+00:00
Days remaining
84
Serial (hex)
05379833105FC8834F1359CAC681BCAEFFA6
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

6D:12:60:83:02:02:52:B8:23:9C:EA:EA:6C:06:2F:95:71:D6:4C:AD:4B:3B:7B:F9:3E:01:13:3C:7E:BC:17:F9
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
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.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://yr2.c.lencr.org/39.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 00:1A:5D:1A:1C:2D:93:75:B6:48:55:78:F8:2F:71:A1: AE:6E:EF:39:7D:29:7C:8A:E3:15:7B:CA:DE:E1:A0:1E Timestamp : Nov 6 03:03:54.131 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:24:4F:B6:04:66:0D:A3:7F:94:42:4B:D3: AB:E5:93:3F:23:D9:95:14:05:DC:FF:30:55:8E:F0:A6: 4E:DE:DA:92:02:21:00:A9:B4:B4:03:D5:0F:B2:1D:9E: CB:7E:9D:F8:1F:71:14:6F:0D:82:2F:77:86:11:EF:75: 52:FF:D2:73:A6:52:1F Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Nov 6 03:03:54.244 2026 GMT Extensions: 00:00:05:00:1D:83:D2:B8 Signature : ecdsa-with-SHA256 30:45:02:21:00:D3:7D:CD:B1:D1:4B:D7:09:0E:74:F4: 2D:DA:30:FA:F1:69:5B:5C:C0:5F:45:02:B4:28:48:D6: 43:30:F7:52:7F:02:20:36:08:06:9A:7E:43:DF:16:1E: 30:A1:E3:57:DB:73:52:69:70:73:E2:D2:64:36:22:9D: 42:57:10:B4:EE:FE:A5
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-11T20:40:37+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
661
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-----
MIIE2jCCAsKgAwIBAgIQTr0klH4k05SALYSlL9WzGTANBgkqhkiG9w0BAQsFADAu
MQswCQYDVQQGEwJVUzENMAsGA1UEChMESVNSRzEQMA4GA1UEAxMHUm9vdCBZUjAe
Fw0yNTA5MDMwMDAwMDBaFw0yODA5MDIyMzU5NTlaMDMxCzAJBgNVBAYTAlVTMRYw
FAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQDEwNZUjIwggEiMA0GCSqGSIb3
DQEBAQUAA4IBDwAwggEKAoIBAQDZ0LxwBppqh84luqMerV/eeL/fXQ7mLQQv1Lnp
WKZbyvGpx6wh6AfnslAnF6ewTkcHA+gSOoBvm3Dfm06AuGiF+KRut4fAcowqnAQQ
CW98+QPP/eOv/wug7Iyk4NkOxf2I6g2f55T6nJoOTLFcukeRq80JGQEYan+dPFr9
OGUgQK2hGKgNkW87pappsOAuUJcroYhRt5uUis4qaZireiseu32gzDJNBAiKtsvd
6HX4v25bpkRNcS/B/Gtc9kVbUpD+2PLPxdei3Tim55k4tfAEXwD2qyiPTxrTNq6l
N+AMr5g2c1dNqkOTwjxeV6L5lpP1rGiYvLnRaPlOqyZRPW+5AgMBAAGjge4wgesw
DgYDVR0PAQH/BAQDAgGGMBMGA1UdJQQMMAoGCCsGAQUFBwMBMBIGA1UdEwEB/wQI
MAYBAf8CAQAwHQYDVR0OBBYEFEAVLSZ57TIgnt+ach3WMh+BDIEMMB8GA1UdIwQY
MBaAFN7nW2DQIm1AKH0/DQH+pLVStFGUMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEF
BQcwAoYWaHR0cDovL3lyLmkubGVuY3Iub3JnLzATBgNVHSAEDDAKMAgGBmeBDAEC
ATAnBgNVHR8EIDAeMBygGqAYhhZodHRwOi8veXIuYy5sZW5jci5vcmcvMA0GCSqG
SIb3DQEBCwUAA4ICAQB0ZUQWZ9/Yn9COEpo+JfecMnB0h0vwDm/M66IqXqw3LoaL
mx9lZvRTeDIS67PUeI3yCA2W6PKRD0/FE/G57lOmS+Xy5AaaL00ICGOqjNcCaMWW
8o8nevHOd4i4lqgtznE/28QwlcdJyF8yBiWHpnyjhEpmNWJURgOCOg2xpwRMBCsj
MScqYPtOhBeuYQvSwAEeTML2Ukh6uGuX4E14q65Ja8cdjF5bAldnP1eE4FBaAwsZ
G2fOqqrKV03Y85Nw2btedP1AtliQuJZs/Jo/gXxXdc7LrH3McgnpnbTiAncX7yES
hP6kzQejllqMCIt52HOjxDGWafS7Xw+DKwqmH+Eqy8dcbOuag/1AYlQoKNVK3F5q
Hh6tEDiMqQcLIibGKteE6iHo4A/bIScbzrhXUYuism42ZYzmc48FMVIH3qy4L84E
TdAH2gtxw0PAhvRVXp8HP7wfngpzsN/8xOTpeRSbM4+Qbc56G6+Bifmv6sk1ieQb
NA3wJdl4DDUuQSV8hBgx6zoI1ZSGORprDFux7c6rhc77QZMSRrEgomBeklervEve
86ylWmZ3WWHV6RLMi8xNvjd71r4EPIGgY7BZU/VPBkq+uA7Gb6mbJnFgV43uh3xy
LRFgxIAphIukwTGSMZZR+AI+Qnp0BYTWovHXozOf3H8r6hozEoT02JHn0AeTfA==
-----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
2122
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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