www.37827.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:0f:34:4b:08:eb:0e:03:da:05:d5:0d:16:8b:13:aa:3b:d8 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.37827.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:0f:34:4b:08:eb:0e:03:da:05:d5:0d:16:8b:13:aa:3b:d8
Serial Number (int): 266510602758022255095849374711786855087064
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: c7:10:a4:f9:45:92:5e:d9:ea:98:4b:0b:b3:10:ba:9a:05:ad:a0:51
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 8c:fb:58:9c:06:c1:00:15:24:43:58:98:80:c2:44:fa:4a:ee:e2:bb
Fingerprint (sha256): ff:6b:57:43:8c:58:b8:68:4c:a1:d0:7c:66:06:2e:fa:98:d0:49:82:f4:d2:68:a7:2a:95:6b:02:60:06:70:7f

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.37827.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.37827.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.37827.com

Other certificates including the domain name 37827.com

(limited to 100 certificates)
www.37827.com
37827.com
37827.com
37827.com
www.37827.com
37827.com
37827.com
37827.com
82537.com
www.37827.com
www.37827.com
37827.com
33817.com
42661.com
78327.com
37827.com
www.37827.com
abruzzoweb.com
www.37827.com

Certificate

The complete raw certificate details for www.37827.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 266510602758022255095849374711786855087064
 . . . . . . . . [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 2019-12-25 06:04:35 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-24 06:04:35 +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.37827.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 763066822092531464140991044108192751095837653223750017779979171078530346799033828771054317085777257607714268633354596130095386559249757106122530819375737234256686119648294368116131550847861915409099363420451864882207552878608315407086244310531329070575344407527923153035547302496466709296417686802835740233405393454525314811214628925510885736086427168002253407654373503532059651466218091054725387826319063617022630299725408222500889367859250685878294980495063792115038146735416153475209705010823893178762617581460582073406065663893750543263429739004334821416278044498577320494286005523211625982220090724291010832809356625534008042292305370775588461183642762753664791252641152845945078212919097986203912173956091411274694337972248798115300987998744089917364250695368665776585245109151490984218121319337061294215485139436171995606421958092369858679716360145975148507090133451431773668986899385763871464421979672700640232576022469458312034312906538621258766062806729701577301030521564385057323370336704084883331512653161565946284404532935226515646192960541540491402152406439685669162017720133936740244166187484230156492467116896091709353820566019828341710494111340889215650921431553377142443973009736021570084087761897261187094801508227
 . . . . . . . . . . . . . . . . . . . . [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)
							c710a4f945925ed9ea984b0bb310ba9a05ada051
 . . . . . . . . . . . . . . . . [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 (17 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.37827.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)
							00f1007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016f3bdf1f82000004030047304502202335a807d8b8bf4b9f8b7d914f67bda9c47543422507c8a3e911f5f758f0a98a022100c3afb9702ae24e067542aea0bacffac4d2aa812dbd0f9849eb0b0303d58ebb69007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f3bdf1f720000040300483046022100bde4d4b70cc7e858ea597af5b3febb11765cfa61350c97c8fbac40c15c9ae956022100c3bf4ce7a41bc12d0033e1394c69cb26d25d7da128af800aaca4822321ee76ad
 . . . . [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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