www.du4.co

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:e5:ba:87:0f:32:3a:83:62:03:30:61:d4:e3:fe:bc:6c:99 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.du4.co

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:e5:ba:87:0f:32:3a:83:62:03:30:61:d4:e3:fe:bc:6c:99
Serial Number (int): 339509457495683205770265465964092003740825
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: d3:16:a1:04:fc:09:ef:eb:b1:d0:23:26:8d:83:7b:a8:b1:e7:ef:6f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 44:86:4f:ff:56:55:82:96:cd:ff:9a:2b:32:30:6d:4f:7f:a4:49:0e
Fingerprint (sha256): 32:4f:8c:57:5a:e6:8a:b6:db:3c:7f:46:49:4c:0c:c8:26:96:e6:6c:6f:12:40:46:ee:b7:ae:77:72:9a:5d:ae

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.du4.co

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.du4.co

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

www.du4.co

Other certificates including the domain name du4.co

(limited to 100 certificates)
www.du4.co
www.du4.co
new.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
du4.co
new.du4.co
www.du4.co
new.du4.co
www.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
www.du4.co
du4.co
du4.co
new.du4.co
biden.du4.co
new.du4.co
www.du4.co
railxtech.du4.co
du4.co
www.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
du4.co
www.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
du4.co
du4.co
biden.du4.co
www.du4.co
du4.co
www.du4.co
aarmembers.du4.co
new.du4.co
biden.du4.co
railxtech.du4.co
new.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
www.du4.co
aarmembers.du4.co

Certificate

The complete raw certificate details for www.du4.co in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnoJK+r39LMJiLMcAjeyU
pOdyIO+9L0dAVD6jM/aI5r2MPpu+Kxy5BrQOj8mL+YprII2oyTR10sATUOZeyuf7
Ucm5z67UvanY53mREFoMZD5F1AUl+L2JeiQIgAVPBGduEqaLc42Z4lrCQGuZHns1
DBLQRd5yQNUu1Vx5AkaXeZ428/PUngh9OA6CJd3PCqZVmJ1Qd44jG9UeMoYRR5tU
ZO8IZHGSVQq7zI2/vSzVmTn3DimrJuXG5z09JJNnPs4jlEMART1Ix3qiIxByYJgz
6QOvUO0FT9THhBL35r2xzSCwSA/ffcCn4qQPCprHtWOMgpPQMRpa3u6ZYSH1Relj
RwIDAQAB
-----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 339509457495683205770265465964092003740825
 . . . . . . . . [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 2019-08-01 16:03:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-30 16:03:00 +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.du4.co'
 . . . . . . . . [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 20009902002590717699483754879650667316102285296072638664576687317827432063367602798906997316769706587319236229464836111953301717280162445144915715620025976960170260387657894541329717259686937722678368142990842831947245715654578162945428633956433720565499860344152837546930917805930175566771383714606096856954675763284598898255455284872527714275422607704006747823143772629000733620162730443798798758884357125631521004529879582074020078033420006773975125423144439626567879758490881572743949281297787868505077258828951677173815490739687392858864639348689572176982813701369478964584709456267735799924175966521289626706759
 . . . . . . . . . . . . . . . . . . . . [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)
							d316a104fc09efebb1d023268d837ba8b1e7ef6f
 . . . . . . . . . . . . . . . . [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 (14 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.du4.co'
 . . . . . . . . . . . . . . . . [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)
							00f000760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016c4e228458000004030047304502203b3cbff568cbb869d24306f9a0cf2e597f9a7021ce0636098951c5c3ac7a581002210097821a940fb43f7996bc243b62521e793a81217b77d7f3cd8a8dbe60f1fadb29007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016c4e2286430000040300473045022100b1d27fea1ac76a3f3417f702a712538dcf22bd51ba18e82db3ade317a743bda6022013a9f94f471f4fe3619ae95da7e2d9921f1a5662548728ec50edc01ef70e5a70
 . . . . [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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