www.bigbandsuperstore.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:20:60:d9:5c:1f:96:99:02:c2:c3:11:7a:e9:cd:45:67:67 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.bigbandsuperstore.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:20:60:d9:5c:1f:96:99:02:c2:c3:11:7a:e9:cd:45:67:67
Serial Number (int): 359466913953009035702774675777652546430823
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 2d:a1:78:14:8f:9d:0c:64:ba:cd:76:bc:2d:47:be:16:18:c5:de:c5
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): a0:9c:73:4e:44:13:82:86:58:71:92:f7:f4:66:ca:e4:c8:41:ae:50
Fingerprint (sha256): 20:f9:1c:ec:00:27:a6:7d:b5:38:3c:e8:f4:be:25:cf:c4:bd:b1:4b:11:e2:8f:91:10:92:60:66:ad:cd:b4:39

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.bigbandsuperstore.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.bigbandsuperstore.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

www.bigbandsuperstore.com

Other certificates including the domain name bigbandsuperstore.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.bigbandsuperstore.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 359466913953009035702774675777652546430823
 . . . . . . . . [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 2019-12-12 18:34:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-11 18:34:00 +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.bigbandsuperstore.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 720649203272957803729580190147070438403939572106302650144475736751287654906653662686791331204157510029985461344586409935740175212436627715779519991825292106135800560088639703931928463852166189555681289555133258591861878641389607011982059418052500409390816919177536219454903601468053946410450152465192238525423157363245211168218684381757637199222176549862356451079367490080210162901048406796557936018392723116377267117502022365249626076939249804838878582816985959716070069763125783284522583161950742007539839040836305181082835135366967663235522438680034287177550754208913637619328961008926875668284506208407499100156666533018518185126343970484764993264162158740649922376297579546263149050455581147309166113105928622917163262810214364515560175469310547908938655734791734498638969761541650815413818245984392818295067087679532948392336269263122436730004726856630735117446490809370078870542361560810385305477666969516809883480763621526754401099139004103116666346059515776181166210439770288870534328148983397030835644629259004843409783935615163829947798672935448592809741883894450350882308125462273643368407408300068181233056314726488504230684896243942823648972259397633497730944440981731398664757870440027442098500535644624186692421337057
 . . . . . . . . . . . . . . . . . . . . [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)
							2da178148f9d0c64bacd76bc2d47be1618c5dec5
 . . . . . . . . . . . . . . . . [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 (29 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.bigbandsuperstore.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016efb9a8ff80000040300473045022100e3545b7cf1f201dd0341deba9bf4e6023152d04ec5102ef271f2456490953183022009da82eb996c5ad44c850d56f519921dd602208f043df99f3992e75bbf9d6e5c00770007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016efb9a8ffb0000040300483046022100b5c67a3ed9aaf5dc8cd1f17ef90f474133b1eec950c264ca7988a71f33fcb086022100c1857ba5c018d66eea2fa3d49640abc20e1ae859971287271f30e043d5e105b4
 . . . . [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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