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openspec.net SSL Certificate – Valid, expires 7 Jan 2027 | CubDomain

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SSL certificate

O

openspec.netSSL certificate & chain

Status: Valid
Expires in: 67 days
Issuer: Let's Encrypt
Chain: 4 certificates

Report Similar sites SSL certificate Technologies2 Same IP20 History Blocklists Subdomains Look-alikes Other extensions Reviews Blog

Chain1 · Site certificateopenspec.net 2 · IntermediateYE1 3 · IntermediateRoot YE 4 · RootISRG Root X2

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Certificate chain

1 · Site certificateValidopenspec.netIssued by YE1Expires 7 Jan 2027
2 · IntermediateValidYE1Issued by Root YEExpires 2 Sept 2028
3 · IntermediateValidRoot YEIssued by ISRG Root X2Expires 2 Sept 2032
4 · RootValidISRG Root X2Self-signed rootExpires 17 Sept 2040

Each certificate is shown in full below, from the site's own to the root.

1

Site certificate

openspec.net

Valid

Issued to

Common name (CN): openspec.net

Issued by

Common name (CN): YE1
Organisation (O): Let's Encrypt
Country (C): US

Validity

Valid from: 9 Oct 2026, 07:42 UTC
Valid until: 7 Jan 2027, 07:42 UTC
Days remaining: 67

Technical details

Serial number: 05:C4:0F:12:A8:69:89:C6:40:47:11:AD:3B:C9:A6:D9:4B:FE
Signature algorithm: sha384ECDSA
Matches the domain: Yes

Names covered Subject Alternative Names · 1

openspec.net

2

Intermediate

YE1

Valid

Issued to

Common name (CN): YE1
Organisation (O): Let's Encrypt
Country (C): US

Issued by

Common name (CN): Root YE
Organisation (O): ISRG
Country (C): US

Validity

Valid from: 3 Sept 2025, 00:00 UTC
Valid until: 2 Sept 2028, 23:59 UTC
Days remaining: 672

Technical details

Serial number: 5D:DD:70:DD:31:F8:01:C8:5C:18:6A:7A:04:B8:0A:FE
Signature algorithm: sha384ECDSA

3

Intermediate

Root YE

Valid

Issued to

Common name (CN): Root YE
Organisation (O): ISRG
Country (C): US

Issued by

Common name (CN): ISRG Root X2
Organisation (O): Internet Security Research Group
Country (C): US

Validity

Valid from: 13 May 2026, 00:00 UTC
Valid until: 2 Sept 2032, 23:59 UTC
Days remaining: 2133

Technical details

Serial number: 00:87:21:65:FC:34:B6:E5:FB:A8:AD:D5:B3:70:5F:B5:3A
Signature algorithm: sha384ECDSA

4

Root

ISRG Root X2

Valid

Issued to

Common name (CN): ISRG Root X2
Organisation (O): Internet Security Research Group
Country (C): US

Issued by

Common name (CN): Self-signed
Organisation (O): Internet Security Research Group
Country (C): US

Validity

Valid from: 4 Sept 2020, 00:00 UTC
Valid until: 17 Sept 2040, 16:00 UTC
Days remaining: 5070

Technical details

Serial number: 41:D2:9D:D1:72:EA:EE:A7:80:C1:2C:6C:E9:2F:87:52
Signature algorithm: sha384ECDSA