Skip to content

cubdomaincubdomain

Analyse a domain

↑↓moveEnteropenEscclose

Tools Domains by date Extension Contact

Domain intelligence and free developer tools — WHOIS, DNS, SSL, SEO and newly registered domains, updated daily.

Popular toolsWHOIS Lookup DNS Lookup SSL Checker SEO Checker What is my IP All tools →

CubDomainAbout Contact Domains by date Blog Domain prices Registrars API for developers Our crawler Status (opens in a new tab)

ExtensionChrome (opens in a new tab)Firefox (opens in a new tab)Edge (opens in a new tab)Opera (opens in a new tab)Brave (opens in a new tab)

LegalPrivacy Policy Terms & Conditions Cookies Policy Disclaimer

© 2026 CubDomain.com · ABN 53 661 545 083. All rights reserved.

X (opens in a new tab)LinkedIn (opens in a new tab)YouTube (opens in a new tab)Reddit (opens in a new tab)Facebook (opens in a new tab)Pinterest (opens in a new tab)

Tools Domains by date Extension Contact

Log in Sign up free

kosu.app SSL Certificate – Expired, expires 8 Jul 2025 | CubDomain

Home
/
Domain reports
/
kosu.app
/
SSL certificate

K

kosu.appSSL certificate & chain

Status: Expired
Expires in: Expired
Issuer: Google Trust Services
Chain: 4 certificates

Chain1 · Site certificatekosu.app 2 · IntermediateWE1 3 · IntermediateGTS Root R4 4 · RootGlobalSign Root CA

Advertisement

Certificate chain

1 · Site certificateExpiredkosu.appIssued by WE1Expires 8 Jul 2025
2 · IntermediateValidWE1

Issued by GTS Root R4

Expires 20 Feb 2029

→3 · IntermediateValidGTS Root R4Issued by GlobalSign Root CAExpires 27 Jan 2028

→4 · RootValidGlobalSign Root CASelf-signed rootExpires 28 Jan 2028

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

1

Site certificate

kosu.app

Expired

Issued to

Common name (CN): kosu.app

Issued by

Common name (CN): WE1
Organisation (O): Google Trust Services
Country (C): US

Validity

Valid from: 9 Apr 2025, 09:07 UTC
Valid until: 8 Jul 2025, 10:06 UTC
Days remaining: Expired 485 days ago

Technical details

Serial number: 4C:65:EB:1A:51:4B:61:1F:13:1D:79:74:71:C9:A7:95
Signature algorithm: —

2

Intermediate

WE1

Valid

Issued to

Common name (CN): WE1
Organisation (O): Google Trust Services
Country (C): US

Issued by

Common name (CN): GTS Root R4
Organisation (O): Google Trust Services LLC
Country (C): US

Validity

Valid from: 13 Dec 2023, 01:00 UTC
Valid until: 20 Feb 2029, 06:00 UTC
Days remaining: 837

Technical details

Serial number: 7F:F3:19:77:97:2C:22:4A:76:15:5D:13:B6:D6:85:E3
Signature algorithm: —

3

Intermediate

GTS Root R4

Valid

Issued to

Common name (CN): GTS Root R4
Organisation (O): Google Trust Services LLC
Country (C): US

Issued by

Common name (CN): GlobalSign Root CA
Organisation (O): GlobalSign nv-sa
Unit (OU): Root CA
Country (C): BE

Validity

Valid from: 14 Nov 2023, 19:43 UTC
Valid until: 27 Jan 2028, 16:00 UTC
Days remaining: 447

Technical details

Serial number: 7F:E5:30:BF:33:13:43:BE:DD:82:16:10:49:3D:8A:1B
Signature algorithm: —

4

Root

GlobalSign Root CA

Valid

Issued to

Common name (CN): GlobalSign Root CA
Organisation (O): GlobalSign nv-sa
Unit (OU): Root CA
Country (C): BE

Issued by

Common name (CN): Self-signed
Organisation (O): GlobalSign nv-sa
Unit (OU): Root CA
Country (C): BE

Validity

Valid from: 1 Sept 1998, 05:00 UTC
Valid until: 28 Jan 2028, 04:00 UTC
Days remaining: 448

Technical details

Serial number: 04:00:00:00:00:01:15:4B:5A:C3:94
Signature algorithm: —

Report Similar sites SSL certificate Same IP19 History Blocklists Subdomains Look-alikes Other extensions Reviews Blog