12cu.com

Issued by R3

About this certificate

This digital certificate with serial number 03:3e:c4:95:78:ff:9b:03:9a:d9:55:28:b9:d3:07:2a:5a:e2 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=12cu.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:3e:c4:95:78:ff:9b:03:9a:d9:55:28:b9:d3:07:2a:5a:e2
Serial Number (int): 282695669337924998288897863870427981044450
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 5c:d6:09:fc:84:f9:19:4d:da:e7:fa:61:d9:23:8c:f9:5c:25:a6:fc
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): e3:1e:49:bc:70:52:05:22:a1:17:36:2d:23:6f:33:a1:cc:d3:f2:b3
Fingerprint (sha256): b2:b2:6c:5d:77:8b:fd:8f:e7:0a:38:24:86:54:a7:fd:18:2b:28:73:70:5f:70:57:f4:db:17:d6:b7:6c:b4:1b

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwkPe8pcwpHEaMAIiBidl
LptjLBJe/EQVf4GYJb3GxSYf+GioGxmUKp0lpEZKc6GmV4GpkSkW4ETNV2dKK25j
mqkCLsjpTS53PNBz2+qj24HAGa+hE26xvyO7GlYhdwe7fO8nY7In/y+4x2lJD6ls
zpDZ9zbzzNZH7A/LNlZbkAR7Hk6btoF5DAO3QH4zJ03PKA5FzETuF9jMT+nYcGWn
n9DKGTo5OoVZ9HZ1MUeGxqZU83h5KSwubG+UCI/SXeMV9PIlKjiVgIynNVH4+AHD
uy3mzexSb+lUNk/9q1r/ETXNw8Mx8xbyAnnwx9dIMUSNDvr4S1iASc014669uwDk
OQIDAQAB
-----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 282695669337924998288897863870427981044450
 . . . . . . . . [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 2023-07-20 09:45:21 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-18 09:45:20 +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 24523699546233316498232687433413362767321655496850107981027018047465180483014782233860591981131294670044015383249045920696848932010296375355315798203889987930180155431860149311801319186289630909286492287592044115960829256725903322944519580482388825094594347925917599307258460721075606342710217868570222154912018661929285378740144686970020622531774755212730160163372758064516741825711683344030941332334666981323582380512335176788407910362420795380533376643099147699360929559569075056475786757943614685843614795808206972463719410416560742040969607051622965576598358031621298882924497800814290510059717141753894698804281
 . . . . . . . . . . . . . . . . . . . . [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)
							5cd609fc84f9194ddae7fa61d9238cf95c25a6fc
 . . . . . . . . . . . . . . . . [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)
							00f2007700b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018972e780320000040300483046022100ef27f53bb4b7fb03ce451ab8707a0774565efd481b825b054d1aa19ab639614d022100952af46f3ce30a8be4f33f855dc2e3996b18355b8f3a00f3ee121326f61c71f4007700e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e0000018972e7802c0000040300483046022100f041253d2d8faf4f7a38cbd40429e290ad07797b10db6f4806c20a8ca2fb5ce1022100dbfa0da4baa307f14e4b74896c30eaf4fd0dfc958198c588535d4bb1923e8a69
 . . . . [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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