cobaltseating.co.za

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:94:d6:4e:2d:a6:24:82:aa:50:65:ea:2a:30:4f:6a:e1:68 was issued on by Let's Encrypt.

With 10 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=cobaltseating.co.za

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:94:d6:4e:2d:a6:24:82:aa:50:65:ea:2a:30:4f:6a:e1:68
Serial Number (int): 311983508815704176812496133281800572821864
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: af:dc:52:74:6f:52:d6:1b:05:b1:a1:fc:68:1a:7e:de:30:a9:9e:1f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 37:4a:a3:9e:a8:ab:10:0b:ba:2a:bd:ef:f5:3f:89:65:71:eb:c5:6d
Fingerprint (sha256): 3f:ae:4e:7b:1d:f1:94:21:ac:e4:63:c8:eb:56:6c:be:86:a8:ba:bb:a0:e9:c9:86:90:35:f2:7d:8e:a4:4c:94

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate cobaltseating.co.za

10

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for cobaltseating.co.za

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

cobaltseating.co.za
iwritecolours.com
procareradiology.co.za
rapp.co.za
signup.shiur.cloud
www.cobaltseating.co.za
www.iwritecolours.com
www.procareradiology.co.za
www.rapp.co.za
www.signup.shiur.cloud

Other certificates including the domain name cobaltseating.co.za

(limited to 100 certificates)

Certificate

The complete raw certificate details for cobaltseating.co.za in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn5I+PqmqizW5IPwuo0/x
HSJMHjLzXJuuaFpOO20OC/PMfAzl6QEUJqd7P9T/LUy2QNUhqab/nTtBAWIKo03o
QRywu5pXPrvhmsNXIFf6BJJbeVz8cSncrh+/uElqWCNuyXzwLdL7ElSqXh7r9yM0
itf+RnSV5bgQ1L+NrG7N3/ImXivKvyLVOUcQ+ZxuMCpK/iQi0i5tq1/1anVD8ET9
2EoMjCVltQ7+cyJ98kMhODQHBRh7JoPSAd1fN1YN1Vf2yNQoImaNRLSH8HGhSEyV
hJd6ruA1HhWHY4mm/1H3L71Vr9PmjmuRV2qiqqwi4e1QifkKTFp8L/czioeus9oH
uQIDAQAB
-----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 311983508815704176812496133281800572821864
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-04 12:59:27 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-04 12:59:27 +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 'cobaltseating.co.za'
 . . . . . . . . [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 20144005671510626913985740881618615304460103674061446981107976711889500419622681303496440732556635893983950368442720072153168908579893776024977720965479446555967219754456088157814375463441236038172484559100981950390189085835539538113378364719389056092535507929382776618928414590035452913229904490057425372028773026750822236642647452327703897533916957473420013819284692011247178405418208830443686011632436282135114651238139072561908341985049912013593426540709027059738961294828017412583117783801132505621112730549860843057070090800993750389788337140245897124385510111286190893121687935096444795180027781577086691051449
 . . . . . . . . . . . . . . . . . . . . [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)
							afdc52746f52d61b05b1a1fc681a7ede30a99e1f
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (215 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cobaltseating.co.za'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'iwritecolours.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'procareradiology.co.za'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'rapp.co.za'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'signup.shiur.cloud'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cobaltseating.co.za'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.iwritecolours.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.procareradiology.co.za'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.rapp.co.za'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.signup.shiur.cloud'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0075005ea773f9df56c0e7b536487dd049e0327a919a0c84a11212841875968171455800000170107faadc000004030046304402202d3c79e82a49fd7d46475197fcd750e3451ccdddc813ce3b136dd9078900faba0220728a4489835dab8725728c35faadc41f03a404e5220936debfe0cd652672541b00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000170107fab030000040300473045022024be84683ed7af82362e185d33ab5a10ddf9a73292a6fa26011b6da83809d192022100b0c72e3e276674ecc0b45ed3cb33ffb98f42b5c3982b0f4dc0b4d4b3247d828d
 . . . . [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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