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

optical.no · 91.90.47.251:443

Verified

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

Subject
CN=reminder.no
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-08-26T14:52:58+00:00
Expires
2026-11-24T14:52:57+00:00
Days remaining
62
Serial (hex)
068916EDFF55CB63DF7AE5A3A0DCED5401E5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:blix.com, DNS:blix.eu, DNS:blixhost.no, DNS:blixsolution.no, DNS:blixsolutions.no, DNS:citycom.no, DNS:grayfiber.no, DNS:greyfiber.no, DNS:optical.no, DNS:reminder.no, DNS:www.blix.com, DNS:www.blix.eu, DNS:www.blixhost.no, DNS:www.blixsolution.no, DNS:www.blixsolutions.no, DNS:www.optical.no, DNS:www.reminder.no

SHA-256 fingerprint

BB:09:94:D9:D4:9F:CD:05:CD:F6:8F:58:14:AA:E3:3C:00:D9:AC:A6:B9:DB:0E:5F:96:B1:C0:68:FD:71:16:5E
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
3A:75:52:B1:18:B1:91:65:CF:66:E4:79:94:09:81:5D:86:D1:30:C2
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:blix.com, DNS:blix.eu, DNS:blixhost.no, DNS:blixsolution.no, DNS:blixsolutions.no, DNS:citycom.no, DNS:grayfiber.no, DNS:greyfiber.no, DNS:optical.no, DNS:reminder.no, DNS:www.blix.com, DNS:www.blix.eu, DNS:www.blixhost.no, DNS:www.blixsolution.no, DNS:www.blixsolutions.no, DNS:www.optical.no, DNS:www.reminder.no
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/102.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:AF:86:3D:3B:3E:E5:9F:A5:77:DE:A8:24:5D:36:B0: D9:ED:22:A2:23:F4:61:77:41:22:94:52:EE:95:50:5F Timestamp : Aug 26 15:51:28.752 2026 GMT Extensions: 00:00:05:00:1D:F6:73:91 Signature : ecdsa-with-SHA256 30:45:02:20:35:82:23:81:92:B1:8C:71:7C:87:A5:15: B5:E8:A9:34:95:02:9E:C9:AC:98:16:C4:11:E8:E8:44: 03:9A:0F:4A:02:21:00:B6:40:A6:B2:7A:0D:E6:00:C9: F2:9F:24:A9:DA:71:61:51:BB:E2:5C:A5:1B:06:C9:76: 5F:25:A0:63:A5:6D:7C Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Aug 26 15:51:28.639 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:27:A1:DE:D2:51:73:76:5C:30:DC:BA:1E: D8:DE:F7:9F:90:A2:FD:2F:39:66:52:A1:8F:75:2B:AD: 96:05:9C:2F:02:21:00:FB:A5:F0:18:61:81:A6:51:EF: 76:96:55:1C:1E:6B:4C:1E:DB:13:DD:62:E0:72:50:7F: 91:28:0B:89:79:68:CE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-22T21:24:35+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
711
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
2172
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

Registration / WHOIS →DNS records →