www.barclayparkcity.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:ea:06:7b:49:d4:ea:86:af:22:03:7b:ff:f2:7a:81:f9:09 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.barclayparkcity.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:ea:06:7b:49:d4:ea:86:af:22:03:7b:ff:f2:7a:81:f9:09
Serial Number (int): 340971547172753503504332667240728783616265
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 7c:40:a4:a5:ab:69:97:5d:6e:6d:82:cb:27:67:0d:eb:56:f1:cc:5d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 62:b4:73:62:59:84:42:22:6b:35:2a:13:ff:3e:07:a4:a2:29:a1:bb
Fingerprint (sha256): 86:28:a1:a0:ac:a6:80:52:2e:12:9d:bf:57:55:7e:80:fe:34:8f:7f:bb:1e:91:e2:ad:62:55:dc:87:e1:0b:7b

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.barclayparkcity.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.barclayparkcity.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.barclayparkcity.com

Other certificates including the domain name barclayparkcity.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.barclayparkcity.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 340971547172753503504332667240728783616265
 . . . . . . . . [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 2019-12-11 11:05:44 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-10 11:05:44 +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 'www.barclayparkcity.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 782400497179583516156208761343745925350814421498965735635034025351262297663713592537306398363666287781799799526070101392193044974107237386737846124614863230720778643666335774836681112759583199626630537301447036123629600191599147503338299361839080256385995320415023932462357854829476365232697246742898750764198925666924347383604763258699101155849118793497179594723075804347194763575352455703611552902561490221918558612869181237715135162150985633429268537858117757955947324836212991429813052351704221339418475617020955073591370983463524665280777894343931642260720218574813847822799708876246305574682487534685926310513849109054159435581638259986982538531260227647940700227603457223936690460520428641261504685038759123983526829338134241726288267095173900054699973441086995361344728600276093857805813774984927025290712238578821547710109522231504389675369822637565414272190154595572074379926321193707067580772156908719125277926076628866817419772468312629070359350818222840342790006152248154859017721133355145037400003505863047838120155857209927781803916284765465646850783584063710032709255561661582071428084419317069881392152553936127258741257141417628843178742307167911928079333963757798417432591294763749279418690252547445522574274921423
 . . . . . . . . . . . . . . . . . . . . [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)
							7c40a4a5ab69975d6e6d82cb27670deb56f1cc5d
 . . . . . . . . . . . . . . . . [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 (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.barclayparkcity.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)
							00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016ef4d9cb3d0000040300483046022100b35ac7dd4787aa5f9dd29b343c4a5804c5e9417b52e0cebaa2c7ae0ac772d04e022100ffbf77a3eb866750ad63f150b8c4f6fe487097ab3e78abdeab3ade423e3c5c6b00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016ef4d9cb640000040300473045022002e0f9807e25761470f19b8104c05971a243d29017394c82a8eb5a668feb453d022100ab2bc7cc9e6965fed5a4483548471066a58428c4706330ecb9084c6e640da2ba
 . . . . [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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