THE CERTIFICATE BEHIND THE CONNECTION

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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

bart.nmu.edu · 198.110.199.7:443

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: C=US ST=Michigan L=Marquette O=Northern Michigan University OU=Network Operations Center CN=bart.nmu.edu emailAddress=abuse@nmu.edu
Issuer: C=US ST=Michigan L=Marquette O=Northern Michigan University OU=IT - Technical Services CN=Northern Michigan University Certificate Authority 3 emailAddress=certmaster@acs.nmu.edu
Valid from: 2025-08-01T12:25:44+00:00
Expires: 2026-08-31T12:25:44+00:00
Days remaining: -52
Serial (hex): 79F00F87DD86B911C7A2B3187A5FB00B97DC8C89
Signature: RSA-SHA256
Public key: RSA 4096

Subject alternative names (SAN)

DNS:bart.nmu.edu, DNS:download.nmu.edu, DNS:ftp.nmu.edu, IP Address:198.110.199.7

SHA-256 fingerprint

4B:77:93:B2:40:82:4B:B7:79:96:84:35:EE:2B:22:AE:43:1C:AF:8E:03:9F:9F:E0:BF:C0:D0:89:CA:98:F9:0B

Certificate extensions & PEM

basicConstraints: CA:FALSE
keyUsage: Digital Signature, Non Repudiation, Key Encipherment, Key Agreement
extendedKeyUsage: TLS Web Server Authentication, TLS Web Client Authentication
subjectKeyIdentifier: B4:08:9D:39:55:05:68:F8:E8:57:9E:7B:E7:C5:98:B6:07:A9:4E:99
authorityKeyIdentifier: DirName:/C=US/ST=Michigan/L=Marquette/O=Northern Michigan University/OU=IT - Technical Services/CN=Northern Michigan University Certificate Authority 3/emailAddress=certmaster@acs.nmu.edu serial:97:71:5B:B4:79:5F:D1:AF
issuerAltName: <EMPTY>
subjectAltName: DNS:bart.nmu.edu, DNS:download.nmu.edu, DNS:ftp.nmu.edu, IP Address:198.110.199.7

-----BEGIN CERTIFICATE-----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A1UdEwQCMAAwCwYDVR0PBAQDAgPoMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF
BQcDAjAdBgNVHQ4EFgQUtAidOVUFaPjoV55758WYtgepTpkwggECBgNVHSMEgfow
gfehgemkgeYwgeMxCzAJBgNVBAYTAlVTMREwDwYDVQQIDAhNaWNoaWdhbjESMBAG
A1UEBwwJTWFycXVldHRlMSUwIwYDVQQKDBxOb3J0aGVybiBNaWNoaWdhbiBVbml2
ZXJzaXR5MSAwHgYDVQQLDBdJVCAtIFRlY2huaWNhbCBTZXJ2aWNlczE9MDsGA1UE
Aww0Tm9ydGhlcm4gTWljaGlnYW4gVW5pdmVyc2l0eSBDZXJ0aWZpY2F0ZSBBdXRo
b3JpdHkgMzElMCMGCSqGSIb3DQEJARYWY2VydG1hc3RlckBhY3Mubm11LmVkdYIJ
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iV5L/BxMNXFDSJ3euInZnHKHqV7y1kCO2/AAbp4um10einLfsZyHd7MIcxMx1h9y
Jm6sX69OD3tpoyry+RPuzZdNfXGJtHFnfTUu8nZxD1LioR7lr/V3KPEZuvfuQhtW
a6FD9MDN9GbHwm/54LDNhfyovKWZx83F0wagPHaWLe7IlsvPGZbsonXLnrmkwrJs
VaHaohz2lzp2+l0xoiZjpSM32Eyb3K1HlD0kofvQtqf1svEbK8XY1jOArgPZxIBk
0ZjFaesx6VYr7WZGmzjX77TsLhl6hNELFZ4teeB6IFWa6QJQEFcPJbkxcb7d7hjI
UC6bka1gcjHxmpD79hxEirtpcA+FqqoOqtYAD01O3+Bl24VaOdYs1LiNN2NtxvLg
p/wRSTo/DyHuNRK9HwRNC81pWfhBZti1+b3aS5TYMD2m/Ww+l/3a4rv3T9VzMBDj
e3PmcfoT
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-22T06:57:36+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject: C=US ST=Michigan L=Marquette O=Northern Michigan University OU=IT - Technical Services CN=Northern Michigan University Certificate Authority 3 emailAddress=certmaster@acs.nmu.edu
Issuer: C=US ST=Michigan L=Marquette O=Northern Michigan University OU=IT - Technical Services CN=Northern Michigan University Certificate Authority 3 emailAddress=certmaster@acs.nmu.edu
Valid from: 2015-02-25T19:33:29+00:00
Expires: 2046-01-01T19:33:29+00:00
Days remaining: 7011
Serial (hex): 97715BB4795FD1AF
Signature: RSA-SHA256
Public key: RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

B7:01:8B:18:F5:42:03:D6:72:12:4F:3E:1B:DF:3F:12:27:99:6F:3D:33:B6:09:53:4E:E0:74:71:96:6E:BE:EB

Certificate extensions & PEM

-----BEGIN CERTIFICATE-----
MIIFRDCCA6wCCQCXcVu0eV/RrzANBgkqhkiG9w0BAQsFADCB4zELMAkGA1UEBhMC
VVMxETAPBgNVBAgMCE1pY2hpZ2FuMRIwEAYDVQQHDAlNYXJxdWV0dGUxJTAjBgNV
BAoMHE5vcnRoZXJuIE1pY2hpZ2FuIFVuaXZlcnNpdHkxIDAeBgNVBAsMF0lUIC0g
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MTE5MzMyOVowgeMxCzAJBgNVBAYTAlVTMREwDwYDVQQIDAhNaWNoaWdhbjESMBAG
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HC+b2sF9JXfxhtgqOQYWIqZaA0iqa+6iVN6eCTmV++Y6k+UyXuzItJRwWdgd081B
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XI1euxtOheCcBweDII2FFYtEyEiOnczRZiPdAjFkTQzqvSjo/FdRnF4U+u6M3cro
7JDiBsERdnwYKryQ/4fpJ6+u6E9A+9CKHvjBRQlR/rPaOet0tYRj1Vn6ahFnlpCF
AFfXtlhV233RljLxQdSkCqIt1RHzK2ADnJv+t557yHZQ6/7IAPGZOHJO983/Ni7j
+ir6Lk7bguIUSNhPmoNbLe6Ir+acE1M1l2vCnqe9LTGUw2+zXX3S8x+TSjc4cjXi
beed2qsNAUE=
-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

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