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40542.blog SSL Certificate – Expired, expires 2 Feb 2026 | CubDomain

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SSL certificate

4

40542.blogSSL certificate & chain

Status: Expired
Expires in: Expired
Issuer: Let's Encrypt
Chain: 3 certificates

Chain1 · Site certificate21497.app 2 · IntermediateR12 3 · RootISRG Root X1

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Certificate chain

1 · Site certificateExpired21497.appIssued by R12Expires 2 Feb 2026
2 · IntermediateValidR12Issued by ISRG Root X1Expires 12 Mar 2027

3 · RootValidISRG Root X1Self-signed rootExpires 4 Jun 2035

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

1

Site certificate

21497.app

Expired

Issued to

Common name (CN): 21497.app

Issued by

Common name (CN): R12
Organisation (O): Let's Encrypt
Country (C): US

Validity

Valid from: 4 Nov 2025, 08:33 UTC
Valid until: 2 Feb 2026, 08:33 UTC
Days remaining: Expired 256 days ago

Technical details

Serial number: 05:52:A4:86:7C:5F:AC:B8:7F:4A:07:CC:B1:82:E4:F6:63:12
Signature algorithm: —

2

Intermediate

R12

Valid

Issued to

Common name (CN): R12
Organisation (O): Let's Encrypt
Country (C): US

Issued by

Common name (CN): ISRG Root X1
Organisation (O): Internet Security Research Group
Country (C): US

Validity

Valid from: 12 Mar 2024, 17:00 UTC
Valid until: 12 Mar 2027, 15:59 UTC
Days remaining: 146

Technical details

Serial number: 00:C2:12:32:4B:70:A9:B4:91:71:DC:40:F7:E2:85:26:3C
Signature algorithm: —

3

Root

ISRG Root X1

Valid

Issued to

Common name (CN): ISRG Root X1
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 Jun 2015, 04:04 UTC
Valid until: 4 Jun 2035, 04:04 UTC
Days remaining: 3152

Technical details

Serial number: 00:82:10:CF:B0:D2:40:E3:59:44:63:E0:BB:63:82:8B:00
Signature algorithm: —

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