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

tcsg.edu · 208.109.191.55:443

Verified

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

Subject
C=US ST=Georgia O=Technical College System of Georgia CN=*.tcsg.edu
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA OV R36
Valid from
2026-01-21T00:00:00+00:00
Expires
2027-02-21T23:59:59+00:00
Days remaining
145
Serial (hex)
3ECE6E5354350C0DCE1E2DBCE2499E35
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.tcsg.edu, DNS:tcsg.edu

SHA-256 fingerprint

24:44:0B:E8:A9:18:0A:24:62:5D:28:CE:6C:1B:7F:E2:7A:DA:9C:F7:F7:E3:8C:8A:21:FC:4F:65:95:61:D3:67
Certificate extensions & PEM
authorityKeyIdentifier
E3:66:74:BB:70:68:8D:2C:5D:4E:0E:A6:4A:8F:9B:37:22:9C:82:92
subjectKeyIdentifier
D9:CD:8C:47:26:B3:08:1F:88:3B:89:48:7A:C9:18:2A:19:2D:D2:CE
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.1.3.4 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationCAOVR36.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationCAOVR36.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:*.tcsg.edu, DNS:tcsg.edu
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Jan 21 21:53:39.861 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:9D:30:DE:D6:1D:CA:B0:36:36:D7:B0: 79:A8:DE:B5:83:89:92:F3:79:E8:3B:89:66:E2:ED:AF: 2A:CF:81:1F:BB:02:21:00:8A:C8:8C:7C:74:4F:4F:3D: 9F:80:05:B1:5F:7C:B1:5A:15:C0:D5:6C:F9:09:A6:94: 89:20:26:50:CA:74:51:FF Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Jan 21 21:53:40.186 2026 GMT Extensions: 00:00:05:00:01:B1:48:FA Signature : ecdsa-with-SHA256 30:45:02:20:23:0D:51:AF:6F:67:D6:66:5E:26:DC:18: A3:F6:17:4A:18:87:E6:52:27:F3:50:7A:B1:C5:E3:D3: 1A:92:FB:96:02:21:00:B0:2B:1E:6C:71:0B:5C:C6:0F: 4B:EA:E6:18:DB:57:AB:F6:8B:4D:F9:7C:C0:D8:F8:99: 84:5D:F4:20:10:B7:FB 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 : Jan 21 21:53:40.634 2026 GMT Extensions: 00:00:05:00:00:13:0E:7E Signature : ecdsa-with-SHA256 30:44:02:20:30:28:B7:AC:E1:F9:60:11:83:F0:DB:4B: 08:AD:A4:77:B8:B1:51:4A:EC:45:86:63:38:C2:50:2E: 0F:F4:51:F7:02:20:01:17:C1:6C:29:43:D4:14:73:F9: D7:F0:51:61:FA:CD:E0:E3:44:85:F7:55:50:3C:E8:CF: 3B:6C:44:2F:84:6E
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-29T15:21:59+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA OV R36
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Valid from
2021-03-22T00:00:00+00:00
Expires
2036-03-21T23:59:59+00:00
Days remaining
3461
Serial (hex)
2C1A3C76E943DDDDFF191B31890AED71
Signature
RSA-SHA384
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

65:42:D1:76:BE:D5:0F:19:3C:0C:E2:97:AE:44:EC:D8:A0:A8:6B:EC:2E:DE:68:27:69:34:40:59:B4:E7:85:30
Certificate extensions & PEM
authorityKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
subjectKeyIdentifier
E3:66:74:BB:70:68:8D:2C:5D:4E:0E:A6:4A:8F:9B:37:22:9C:82:92
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationRootR46.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationRootR46.p7c OCSP - URI:http://ocsp.sectigo.com
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Issuer
C=GB ST=Greater Manchester L=Salford O=Comodo CA Limited CN=AAA Certificate Services
Valid from
2021-03-22T00:00:00+00:00
Expires
2028-12-31T23:59:59+00:00
Days remaining
824
Serial (hex)
E37CA2E9701E339C2F3FB0ED360FF90A
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CE:75:58:0B:C6:79:6D:3B:3E:A2:C3:E7:42:59:D0:D4:03:07:24:08:E9:60:C7:71:39:C2:FB:5A:3D:94:19:E4
Certificate extensions & PEM
authorityKeyIdentifier
A0:11:0A:23:3E:96:F1:07:EC:E2:AF:29:EF:82:A5:7F:D0:30:A4:B4
subjectKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy
crlDistributionPoints
Full Name: URI:http://crl.comodoca.com/AAACertificateServices.crl
authorityInfoAccess
OCSP - URI:http://ocsp.comodoca.com
-----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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