*.amuq.net

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:7b:40:67:17:30:ab:b0:20:08:dc:3c:87:fb:f2:e1:aa:81 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=*.amuq.net

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:7b:40:67:17:30:ab:b0:20:08:dc:3c:87:fb:f2:e1:aa:81
Serial Number (int): 303277194795214342192554338764570354625153
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 91:a8:c1:4d:d3:5e:86:36:8b:64:c6:37:85:88:ee:fe:df:04:12:2e
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 3a:3c:54:8e:be:51:25:47:5b:a7:18:ac:16:00:8b:9c:1a:6f:8f:c3
Fingerprint (sha256): 6e:19:ef:39:4d:74:63:0d:73:28:59:cc:44:cb:aa:37:f2:71:65:27:80:7f:f1:f3:3b:d7:12:11:ce:a3:31:72

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 *.amuq.net

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for *.amuq.net

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

*.amuq.net
amuq.net

Other certificates including the domain name amuq.net

(limited to 100 certificates)

Certificate

The complete raw certificate details for *.amuq.net 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 303277194795214342192554338764570354625153
 . . . . . . . . [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 2020-03-03 20:46:37 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-01 20:46:37 +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:12|false] UTF8String '*.amuq.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 898845809805995459626799729527565594547998680952554152750869044971889976816745266139766407987099393091275948053056871525283730423590881609876991969989754920974446462485731672523721071261666539717109622425054142148953507098595443567182638347960598867115296566665842642555427033769619396743607653760222655666704038365530426406390434708006547317041682841515781971989800110167010263874617753895271622231524119016040503903228366036778825621755519445331936355805295554608639746137831119890818410263482781532295823414224340490539493773232185251514809315636690321529805200775756374638991855517061202675701194980249675170174757110561615748620802215172016007541442383546488937300663114975129103514324191208855789601029254284993014340990508349844677613109895854272987236839040527261339619041465443082064074363653293046727360014152227220861881205233216645410329410067748599793284500535179087068575516753265678059182926418674317254639928896300522446814224416626360719471544784042456380230974642103835508417388192217149774212006772549896189024226499768781994804894209607858598915657524917462017532478045219232645118961251782314752305742410489369982569220876462947627758696037863296910392666206264081129260390925054323051707432840252450483770630771
 . . . . . . . . . . . . . . . . . . . . [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)
							91a8c14dd35e86368b64c6378588eefedf04122e
 . . . . . . . . . . . . . . . . [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 (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.amuq.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'amuq.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 (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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700e712f2b0377e1a62fb8ec90c6184f1ea7b37cb561d11265bf3e0f34bf241546e00000170a25d70650000040300483046022100cc9009dce2bbe6238f1fdf9a63ef63c9d35782387faea5c84949e92e2062f23f022100c8424e38116763df7d167b34c47f3ebdaa87d6cdcc776d59b952248728de6a7300770007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000170a25d70900000040300483046022100cac310b3cfe6c155cf1fd33c3e2338e2eca61e1df8df6348f896aa7499873979022100b75ef2322f17ce3c9e24c09eadbc46af4cc42f52b2e67452bca566bb6c73c25a
 . . . . [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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