www.k12.biz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:35:c6:89:90:8c:db:16:2a:c9:17:2b:aa:93:15:24:b7:55 was issued on by Let's Encrypt.

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=www.k12.biz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:35:c6:89:90:8c:db:16:2a:c9:17:2b:aa:93:15:24:b7:55
Serial Number (int): 279635724661752240811055927035783503198037
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 98:b5:d7:3b:6b:16:3b:6a:9f:95:1f:60:24:a6:f5:c3:35:9c:84:70
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): c1:07:9f:84:37:92:33:bd:f9:00:bc:ed:a0:96:f6:1f:9a:8f:08:33
Fingerprint (sha256): 92:26:65:bf:d1:46:98:df:3a:a9:fb:84:0c:e3:b7:fe:b7:f7:af:df:e0:f0:59:b5:d3:7f:23:3a:f9:50:db:54

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 www.k12.biz

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.k12.biz

Public Key Algorithm

RSA

Key Size

4096

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

www.k12.biz

Other certificates including the domain name k12.biz

(limited to 100 certificates)
k12.biz
www.organicmedicalcbdoil.directory
k12.biz
k12.biz
www.k12.biz
k12.biz
www.k12.biz
myautodeals.city

Certificate

The complete raw certificate details for www.k12.biz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 279635724661752240811055927035783503198037
 . . . . . . . . [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 2019-11-10 22:16:36 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-08 22:16:36 +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 'www.k12.biz'
 . . . . . . . . [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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 781258626276327484744525731728344459070523328706935338204582703185632600661724760591675557754110274309427808265529282343349143586273461689693865271843350908972152003225479574828673826937279303749085548148731410522341075240315853312240327318583105377676807727266154835097803494911765941312312695723845216128791182352624041647232874358361819034383032959430135608372727728892912490958478188108966138805383744476396807601885418691977428879701928632243774864537578176266806540982035457117297745056573537143346904274447299855550344478044813095361683814934793338017511547749404422813491305685684427355540356921008686091986560451207266735601591915122485593427458409526694898702989564105815367025305546418626298806580883455257354307946833083876078242458791766855866183534828862052578390475880354883151207434612154485874208820197110148502189713549497470417747116455298551725426601757326838237890617995387157020080785736175806545952173684158143244067470371275536525924500866070770135042485772832466376636621466944647161511234891968809215633404524330095296425749248582698577990723747294411448246317807168724773377823372043420391751974669293149600649455865044977567322342104269139540523040008548275407984325331856397955959077481074513241219832511
 . . . . . . . . . . . . . . . . . . . . [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)
							98b5d73b6b163b6a9f951f6024a6f5c3359c8470
 . . . . . . . . . . . . . . . . [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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.k12.biz'
 . . . . . . . . . . . . . . . . [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)
							00ef007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016e579adb090000040300473045022074b93d24ba8f73bc327b5f5264256d6f5d7d02959c98b2be6f3831e8027fa053022100eac4f82922335641b339ed2b8a4467643aa6863295dc7050a9365c55c23c7a72007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016e579adafb00000403004630440220204e542e1c0c2505c0dcf6ac2ab92cf30465f97f1f5a3ecab4967f682ba7ac2a0220514856cb4a711b9fbd65b52cfd3849a809b657769d9f4d0f14adb00736d50ad7
 . . . . [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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