www.xn--35xme.net

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:f0:3d:f6:be:73:35:1f:5b:ee:36:ba:93:48:37:ba:9a:27 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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.xn--35xme.net

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:f0:3d:f6:be:73:35:1f:5b:ee:36:ba:93:48:37:ba:9a:27
Serial Number (int): 343086989931861554606233692396421260155431
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 47:fc:bb:5c:bf:09:90:7b:40:f2:de:7a:42:13:46:c3:99:f2:08:f1
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): eb:dd:5b:67:82:f3:76:de:8a:8a:38:96:8a:19:36:37:e8:64:3f:d7
Fingerprint (sha256): ec:fc:ac:5d:54:cf:55:3d:f6:d6:c9:2b:81:8a:86:79:ac:90:fd:5d:ec:62:4c:70:e0:fe:d5:8e:fd:d1:c2:76

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.xn--35xme.net

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.xn--35xme.net

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.xn--35xme.net
xn--35xme.net

Other certificates including the domain name xn--35xme.net

(limited to 100 certificates)
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net
www.xn--35xme.net

Certificate

The complete raw certificate details for www.xn--35xme.net in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtx69AZNc3BUpZU4s35et
nV2/Ub1TwX4UlTLaQ9kc2cWk8xIPDK9o6O6Tk6ZpQvmkCiZE/YDMkJNpNgTRa6g4
ifyscMV0fxkFyNyMk7j7oNoM4OlpJYj+qOrtgKfzy2MMdsafo0vmFLrvK3A6XZdY
A7BvskpDbb0RYEyfuQdGdBh4ZiSM55hLFOQBS/X2Nfd3kw9bAhjQeqpJSf7fEMRW
0dcq98rOO9G3TkPD5mjHbxW5ypIwmzOGbIbQrXlVKz9zSMdM3OjZmVz4BmCPxydk
fzRsU30DXRn+nIFYQWHdB0UhmrS0zygj7gv6c/u+DAhgVruZo6O2rM/qQko3AFAF
JwIDAQAB
-----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 343086989931861554606233692396421260155431
 . . . . . . . . [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 2018-10-27 02:38:13 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-01-25 02:38:13 +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.xn--35xme.net'
 . . . . . . . . [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 23116767432060713129840130827365485327223857048943709121020966556354468392592537007379385229936772250847901909788756026165472961643262766201280666784751332780945112560648542748489093245564030448144596950694657845935107698194622845269493748499671650508214620925194996138059422665778510862316279129705628980249232030218917638240932573659444251064344208842031651459563574437690825701926626421606300748907329266853391874142184048708599456463648653059929419329207373024064975718973471190917933134994874215777331208002351187365982390476561297707790422504941542570656066348010904589429468707525722529610971730272238645019943
 . . . . . . . . . . . . . . . . . . . . [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)
							47fcbb5cbf09907b40f2de7a421346c399f208f1
 . . . . . . . . . . . . . . . . [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 (36 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.xn--35xme.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'xn--35xme.net'
 . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . . . . . . . . . . . . . [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)
							00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000166b399cdfa000004030047304502202ff1dddb555294c6dbb4159080a8b16325f03095cbe7379914895459120f6e12022100ff748a984ba4a7f9cb8ff462462f2562f36b7bf906dd8712e2a0f124b49a7237007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000166b399ce58000004030047304502201939feb9458c6b2127275b03542244a0c9ccefbc2bf0db4921148c35c91f876d022100aa0bf56ceb1603a8295fbcbf01d83bafc25e174af81bf81d8fab13a199eed665
 . . . . [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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