dongguanoffice.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:35:1d:c8:ec:0b:bc:1a:c3:f4:e6:48:15:9b:0d:26:11:b1 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=dongguanoffice.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:35:1d:c8:ec:0b:bc:1a:c3:f4:e6:48:15:9b:0d:26:11:b1
Serial Number (int): 279411414100918339818018383074003442340273
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 47:e3:42:a6:d8:d7:a7:8b:21:06:3c:59:89:34:9c:18:4f:08:a4:72
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): cf:60:e0:2e:6f:88:ad:2a:ba:71:df:9b:a6:ed:ed:a0:46:01:2e:37
Fingerprint (sha256): ba:09:76:4c:eb:a1:3f:c0:a3:fa:f1:d6:cb:70:2e:f3:f2:1e:f1:ff:65:f7:79:80:f0:50:fd:48:82:4c:50:62

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 dongguanoffice.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for dongguanoffice.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

dongguanoffice.com

Other certificates including the domain name dongguanoffice.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for dongguanoffice.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 279411414100918339818018383074003442340273
 . . . . . . . . [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 2020-02-21 12:16:38 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-21 12:16:38 +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 'dongguanoffice.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 649883209364688320584157270493703929724480210662033511502603224122317425389123296876380975832971067663403917757598396752724906516807462339122615724526934998859629244821951400672678410896531987756717418939564956231213816305828797786553871146149469061084387271230476280861817442916989466139820748928929225457019819742862242098361296383261154936354268590819756295347621192443562744872797283938101675867170541279172857175315315193648951715995655606579559304549833735188407767680512156093406437246035811678769443875214394281900623942765151008651688412737559213943910177832594773279988267839260357983280340367989642162049847476479378472237261013550309340663127303933375436831715500554232594753814301305457219476508557642377514899164412904619795827637523114008861769071040440732158809870413628764661202323951727165135212309264709076150881119182605782344987082102067183175857013481340424967310436051323112133432892647681776753602013727250625768127761942774110852904374430020264719064711487697706632801784188989432400929903616073002695830596038548891828003472886838397779697628496417833009365144609656641008807966794423726539466904712625437581647724461922077883780063796417856577855600265822407019713449216428788534670033006101621767342962341
 . . . . . . . . . . . . . . . . . . . . [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)
							47e342a6d8d7a78b21063c5989349c184f08a472
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'dongguanoffice.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500e712f2b0377e1a62fb8ec90c6184f1ea7b37cb561d11265bf3e0f34bf241546e0000017067e4936000000403004630440220715b7619b66f2592581634e332f95ce8e5ebbe8bcf8b4f62b9b1a8a08a9655b0022046132a11d3769430b654e704a5f60e4aea25ebaf1007aed83bbfa33f8ed45f3c00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000017067e4938a000004030047304502210089f12c16e3dbd608981662c28613a130cc5c3883f487b5f55fe32b22d15e53a60220501757259cbe9019bc7e72aa30aa5df1158fbffbe3fae13a283c7a8cd1a63875
 . . . . [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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