89621.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:89:bf:14:f4:ea:84:92:34:26:25:21:dc:f1:a0:5e:0e:07 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=89621.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:89:bf:14:f4:ea:84:92:34:26:25:21:dc:f1:a0:5e:0e:07
Serial Number (int): 395321819355830007799333345758279284690439
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: fd:39:fe:71:e6:2f:76:46:28:80:f2:60:15:a7:78:07:61:2d:bc:41
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 45:7a:8c:aa:20:a5:79:97:cb:dd:86:ea:9a:1a:af:89:13:89:7a:78
Fingerprint (sha256): c1:1f:f0:1d:64:16:0b:2f:94:87:ef:22:b6:d0:8e:f0:e0:60:3d:6a:72:1e:e9:27:8d:f0:e0:06:d9:ac:fe:57

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 89621.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 89621.com

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

89621.com

Other certificates including the domain name 89621.com

(limited to 100 certificates)
www.89621.com
calif.world
www.89621.com
89621.com
89621.com
89642.com
89621.com
89621.com
psicologi.org
www.89621.com
convertiblesuperstore.com
89621.com
www.89490.com
www.89621.com
948.me
69462.com
89621.com
www.89621.com

Certificate

The complete raw certificate details for 89621.com 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 395321819355830007799333345758279284690439
 . . . . . . . . [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 2019-12-04 14:23:13 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-03 14:23:13 +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 '89621.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 745947757636650509918749494880038407832264268173975190923132652989589986572817980229344753861571772184513634548817477346305829965075839895072027247036783042702924806211084518942727568066152226043097741696756251775638563084064359938537612497143939724559826216290426504193876740500137609359938524247077100415556133865810344060204177338043382168567190017120240742448076024099731271638068295360224830501388321418136411654960925758923427916823055595275295642784058281266677057709883697467721918024877452701520491144399371568071328215962327604330976956787751397784234799078440349122944862334859254425869159387472322979038097557160963203425524236275006987208185257003426480781733907191010122045064168949049268050431613227835938986190890899045767032601914688921421519273734303339131210743767074261776453774203333822494957157724824038468047379447061355603211291975287080964449851519908344637708543630131166355611534493992870268400606934061875181342708713635074823272912986242745731361509408568209663940460764247271367614148432708955782248589922578758448179156871361024058536621383237730316251355277239074711734459576463425932437057362378128535372370557929698454352205104298908072998963531673149969909591544335761712633112443676873927761606811
 . . . . . . . . . . . . . . . . . . . . [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)
							fd39fe71e62f76462880f26015a77807612dbc41
 . . . . . . . . . . . . . . . . [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 (13 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '89621.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 (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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016ed18216d20000040300483046022100d1d9a49c52b6247412973cbf998229cebd44ef82c08be399dd26c935ea595d57022100cf14d0fbbd426ce71594a7cc6661c369f0e2c945cd840397440a0699c758307d007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016ed18216d300000403004630440220438490f774371b0c5be12da66293fe7226340ca47f7b41401d2607895760d2e3022065aa3ac427c7bae4090700ac4ec10b28f21d73055b7ad8bab4d432d711f1b666
 . . . . [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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