12cu.com

Issued by R3

About this certificate

This digital certificate with serial number 03:f8:49:89:ff:2a:be:28:04:c5:58:6e:91:14:dd:b0:12:ef was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.


We have idenified some issues with this certificate:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=12cu.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:f8:49:89:ff:2a:be:28:04:c5:58:6e:91:14:dd:b0:12:ef
Serial Number (int): 345824634955436279297099434881817634673391
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f1:94:f4:b9:d5:88:12:d6:69:42:fd:d8:97:cd:fe:82:99:0d:be:23
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): bb:ff:55:b9:40:67:0a:3a:d6:59:7a:49:bd:04:1e:b0:9c:18:52:2a
Fingerprint (sha256): 1a:87:a8:14:59:a2:e6:74:12:f9:3e:15:59:8e:93:df:9c:90:2e:09:22:76:09:fc:84:19:09:dd:0a:b1:f7:13

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate 12cu.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 12cu.com

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

12cu.com
www.12cu.com

Other certificates including the domain name 12cu.com

(limited to 100 certificates)
12cu.com
analytics.fontys.12cu.com
office-analyzer.fontys.12cu.com
12cu.com
12cu.com
support-canon-test.gekko.fr
12cu.com
12cu.com
12cu.com
support-canon-test.gekko.fr
portal.12cu.com
kpn.dev.12cu.com
12cu.com
support.dwsford.it
support.senapsis.com
support-canon-test.gekko.fr
12cu.com
support.tecamb.it
support.tecamb.it
12cu.com
kpn.dev.12cu.com
12cu.com
kibana.data.12cu.com
12cu.com
12cu.com
analytics.fontys.12cu.com
12cu.com
12cu.com
support-canon-test.gekko.fr
12cu.com

Certificate

The complete raw certificate details for 12cu.com in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6wp6KU5kM5+w/kqczL8m
SEHhr6iuh1kGvFzoy9WlQ78gXtmZreXzRldt5yF1gxLmammIMpWpMot1i7o65geq
BIhZ7EAibSdZNA0MMJss+ZdgKk6qCnTyIFPtviJbr7fYyQfaMhUY2qT58S50vVFA
zuP24U/Ay8XzD9KDBHXk6//ip3hCEQoHYaDaRpsGR6NP0ZwHPp8YNKiFgOYAVCZh
BnUJ4Y6ENvIQhjefTM/YV0z9IG38vEr9OFvrujGi50KLCPFAsF/113+4cwd9nMwh
6kpg8cNULyEgCnnR2a95wZq3USxAc4HAQ/1nDVI18uPMzpRXuw+b3/ShI8+9XEVJ
HQIDAQAB
-----END PUBLIC KEY-----

ASN.1 decoded

 [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2
 . . . . . . . . [c:0|t:2|false] INTEGER 345824634955436279297099434881817634673391
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-17 09:45:25 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-15 09:45:24 +0000 UTC
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString '12cu.com'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption)
 . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 29671168163342951361929425516294187486138704336757296571146513611475873186113068094392630828551062903094874607137036256679241080562636545496800248211621262216762942410229287397233587246677901669916289062716504204342822120939955512977871618067391377742541700117994997602126604513141424357007905000576685313742250127310146297874867784326161188507727304219787112610721871885067351886217065709919367531621108434487920036289700183999726024602108782884666365849663127756373724245198782047340409118133332102597966866440834293032542019252262667133130125390787524337701208378569622110681016380508536315551531778886465667549469
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537

 . . . . . . . . [c:2|t:3|true] ORAddress 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits)
							05a0
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							f194f4b9d58812d66942fdd897cdfe82990dbe23
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (73 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.o.lencr.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '12cu.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.12cu.com'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (12 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f200770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018bdce2b032000004030048304602210093ad12e2a580b85c2a5c6781a90f66cea557f343d071edc66f718a2c61329eb80221008c4c62cdf243b8a14e5fd2884265cd7f4162b336c6d4c8bff272ccab8d9ba70e00770076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018bdce2b06f0000040300483046022100a3fffe0208a9ec5ab12eb1aca56e9ab422c3d6b80de0d7945391f7a3af177242022100d1e8f96d349cc99d23b3c6f2ff061384c17ba594d6448c7529b1f0a537642251
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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