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

ns1.fribourgip.com · 45.45.217.28:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `ns1.fribourgip.com'

Certificate verification failed

Subject
CN=fribourgip.com
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-11-06T07:46:00+00:00
Expires
2027-02-04T07:45:59+00:00
Days remaining
86
Serial (hex)
055F14AA33812590FF50F610605A5754AFD7
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:fribourgip.com, DNS:mail.fribourgip.com, DNS:webmail.fribourgip.com, DNS:www.fribourgip.com

SHA-256 fingerprint

D7:EB:5E:B5:D8:3B:F8:51:EC:B6:41:52:58:96:BA:59:8E:15:3E:EE:8C:88:60:EF:01:5A:99:82:51:1D:C8:F8
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
8B:BE:2D:27:4E:E9:6E:93:16:B1:9F:26:B5:60:28:11:45:19:A5:55
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:fribourgip.com, DNS:mail.fribourgip.com, DNS:webmail.fribourgip.com, DNS:www.fribourgip.com
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/88.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Nov 6 08:44:31.152 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:38:80:08:BA:D7:70:AB:9E:69:EC:88:66: 89:80:D2:64:9B:85:A1:45:76:21:5D:A6:DF:9E:1A:4B: 91:00:A4:94:02:21:00:8F:21:6F:C1:47:16:F1:A1:47: 67:AB:0C:7B:1C:04:FC:7A:F2:E8:DE:C3:F4:BB:69:FB: 7C:C8:E1:6F:09:31:04 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:E8:22:FC:2B:AB:0E:92:EE:D0:E9:FA:D6:96:64:60: 27:76:D0:17:60:E0:89:05:09:C9:23:A1:B0:3F:C3:7F Timestamp : Nov 6 08:44:27.720 2026 GMT Extensions: 00:00:05:00:16:EE:40:26 Signature : ecdsa-with-SHA256 30:45:02:20:51:10:5B:39:79:59:70:58:1E:5C:9D:86: 28:90:26:25:C5:69:19:69:DE:D6:ED:3F:8A:16:5C:45: DB:02:C5:2D:02:21:00:A6:D5:03:A8:03:A0:78:DA:4D: 1C:C2:91:06:92:FC:27:8C:BA:F4:79:6E:2F:09:BC:32: BD:C0:31:0A:AF:36:5C
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-09T20:12:26+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
663
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
2124
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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