pinetreega.ng

Issued by R3

About this certificate

This digital certificate with serial number 03:c3:a8:14:df:2d:73:40:d6:6e:b9:57:cb:67:f2:0a:f6:04 was issued on by Let's Encrypt.

With 15 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=pinetreega.ng

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 03:c3:a8:14:df:2d:73:40:d6:6e:b9:57:cb:67:f2:0a:f6:04
Serial Number (int): 327915338020671054965905391453042935264772
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 1e:f3:7d:cc:2a:e2:fe:32:e3:a2:78:c4:a4:37:43:67:6c:72:20:12
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 73:4b:3e:02:4b:16:dd:91:32:82:c6:3e:dd:b3:5a:ef:5e:e1:c8:88
Fingerprint (sha256): 79:a2:72:61:33:98:53:60:6c:40:df:fc:f7:39:b3:8c:77:23:f5:ff:b7:56:f5:98:68:bd:f9:bf:78:0e:30:b3

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

Revocation information

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

Check the revocation status for certificate pinetreega.ng

15

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for pinetreega.ng

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

1200net.com
anselmacademics.net
cloudbaker.com
ericbishop.net
etfst.com
exploretechnologies.com
forevergreen.com
freezedriedkakaduplums.com
globalsuites.com
insure4vip.com
inventloop.com
ofmaths.com
pinetreega.ng
schleichercounty.com
www.alpacacoats.com

Other certificates including the domain name pinetreega.ng

(limited to 100 certificates)
pinetreega.ng
pinetreega.ng
pinetreega.ng
approps.com.pinetreega.ng
pinetreega.ng
pinetreega.ng
nfwaterworks.ca
sa-rugby.co.za
pinetreega.ng

Certificate

The complete raw certificate details for pinetreega.ng in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA4U6bqLwJNf60gpBu9FKk
ojh4nPDV0HYaw351gk1TZ/WK+D8yWldfV5X5heMMQo3CBWPy9C2tocqLhN51c1/X
E2s4W5pXOCFhB222+NEUCHhv/M+2yzAGMItVULzCyrTrSzg+Nz6Wz3jCdqTxn+vs
MXVrKm+FU29b1zLcQm6K5F8g4PMtQJHkhww+oz4MhG0sE4zR13zVmJ0mqs9JA+04
apoYH7wOkGYTgcFBgruyPQ/QnlitSt+iVccPfIgOVw0ubWbeBV1xx7i7/RHjLBFp
PlFsJ3Cvp9w0bq6zpvClPEi8Ss2OH29Ma4tvEgWgJrQKBLMfN8PAX/tv9vKeqwO/
KwIDAQAB
-----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 327915338020671054965905391453042935264772
 . . . . . . . . [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 2024-04-15 22:51:45 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-14 22:51:44 +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 'pinetreega.ng'
 . . . . . . . . [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 28442381688300121583497483600809413113144394694803146874982380184144509550714505840633739243194118294475209338984501759245767704468126190399747919616844176086311206182007918218863999622913617543983907841431028152587159894162823240788511218616640831128566548996541388628359528360814668163056471396704877702857422236530651239702813929921269891411595577397929824901854618198754129676216365951992115962627002997143135077403463871291289589452039988760503526815596645270848361076090707332773501899291042984568025382668667298150040651251523156296242671534900645430728650496525888536530089895152130895028771802436339862060843
 . . . . . . . . . . . . . . . . . . . . [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)
							1ef37dcc2ae2fe32e3a278c4a43743676c722012
 . . . . . . . . . . . . . . . . [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 (273 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '1200net.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'anselmacademics.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cloudbaker.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ericbishop.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'etfst.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'exploretechnologies.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'forevergreen.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'freezedriedkakaduplums.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'globalsuites.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'insure4vip.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'inventloop.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ofmaths.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'pinetreega.ng'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'schleichercounty.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.alpacacoats.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018ee42c7f6f0000040300473045022100c4d1f14f2b96995c9db1de2979a2b632b0e7fdcd4916ec5caae35582d2983f3402203bbe878d866cedc7d272b47d0c8bf569190efbb7c5ded1bc01a0c7abd08085b2007700eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018ee42c7f6b0000040300483046022100924b33305ba353a5adafc119efead372d4bc628fba3b5d0b7e8e417a9b46a5cd022100dba7a6f82bedbd415db5674f15c325a2dca9f645566c18c7cdcd6fc5d51946aa
 . . . . [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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