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

nuim.ie · 74.234.72.20:443

Verified

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

Subject
CN=www.alumni.nuim.ie
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-08-13T16:21:54+00:00
Expires
2026-11-11T16:21:53+00:00
Days remaining
37
Serial (hex)
06D91C6329E55111CC585D24AF3CA05BF833
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:academiccouncil.nuim.ie, DNS:alumni.nuim.ie, DNS:ancientclassics.nuim.ie, DNS:campusservices.nuim.ie, DNS:communications.nuim.ie, DNS:cpanel.nuim.ie, DNS:cpdoffice.nuim.ie, DNS:ctl.nuim.ie, DNS:dataprotection.nuim.ie, DNS:fees.nuim.ie, DNS:history.nuim.ie, DNS:immunology.nuim.ie, DNS:maturestudents.nuim.ie, DNS:nirsa.nuim.ie, DNS:nuim.ie, DNS:oifignagaeilge.nuim.ie, DNS:personnel.nuim.ie, DNS:planning.nuim.ie, DNS:studentactivities.nuim.ie, DNS:teaching.nuim.ie, DNS:whm.nuim.ie, DNS:www.alumni.nuim.ie, DNS:www.immunology.nuim.ie, DNS:www.nuim.ie

SHA-256 fingerprint

78:4C:7D:67:7D:06:50:3D:D9:4F:FC:4A:44:E6:7D:5F:94:FD:19:0E:58:61:D4:3D:D4:16:1E:D6:71:E0:06:1C
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
96:A9:1B:DD:84:60:48:03:40:7B:7A:FD:6C:A8:2A:71:50:97:29:CF
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:academiccouncil.nuim.ie, DNS:alumni.nuim.ie, DNS:ancientclassics.nuim.ie, DNS:campusservices.nuim.ie, DNS:communications.nuim.ie, DNS:cpanel.nuim.ie, DNS:cpdoffice.nuim.ie, DNS:ctl.nuim.ie, DNS:dataprotection.nuim.ie, DNS:fees.nuim.ie, DNS:history.nuim.ie, DNS:immunology.nuim.ie, DNS:maturestudents.nuim.ie, DNS:nirsa.nuim.ie, DNS:nuim.ie, DNS:oifignagaeilge.nuim.ie, DNS:personnel.nuim.ie, DNS:planning.nuim.ie, DNS:studentactivities.nuim.ie, DNS:teaching.nuim.ie, DNS:whm.nuim.ie, DNS:www.alumni.nuim.ie, DNS:www.immunology.nuim.ie, DNS:www.nuim.ie
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/52.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Aug 13 17:20:24.428 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:6B:3C:1C:90:49:13:FE:8E:92:D3:D0:F0: D2:8E:88:4F:4A:62:F9:41:C8:77:FA:AE:46:D8:BE:CD: E2:C2:F6:E3:02:21:00:C9:7B:E1:84:FD:3E:00:53:C5: 5A:C0:F2:4C:91:4E:81:DD:79:A0:38:4C:C0:E3:A1:75: E8:F1:1F:01:12:5B:AA Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 26:E3:64:6E:58:69:21:23:BC:34:3F:47:24:35:9B:37: 92:CD:24:5A:88:D8:15:D3:93:33:FD:99:18:AB:47:23 Timestamp : Aug 13 17:20:23.059 2026 GMT Extensions: 00:00:05:00:34:5D:A8:17 Signature : ecdsa-with-SHA256 30:46:02:21:00:E8:D4:1F:08:8A:3B:5A:22:C4:54:64: 3C:B1:A6:43:4B:30:A1:95:DD:73:5F:F4:0D:89:DC:50: C9:B4:2F:C2:3E:02:21:00:97:AE:B5:38:1C:49:2F:65: 5B:56:30:0C:F6:8F:69:AE:AA:F9:13:27:3A:E0:E0:97: 35:14:E7:FC:A2:DF:9B:EF
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-04T19:28:18+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
699
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
2160
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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