www.amazingdebtreduction.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:9a:22:58:f9:fd:f6:4d:51:8d:60:27:f0:69:9e:de:cf:11 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.amazingdebtreduction.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:9a:22:58:f9:fd:f6:4d:51:8d:60:27:f0:69:9e:de:cf:11
Serial Number (int): 313785998045526444727940007160924201733905
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 78:56:bc:c0:a6:51:22:22:6c:bd:2b:0c:86:26:5e:e6:51:94:da:1a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 64:eb:34:6f:d5:db:72:e0:b9:e1:24:47:46:44:f0:e8:99:c9:3c:d3
Fingerprint (sha256): d7:6a:de:a2:41:16:15:29:35:e3:4f:94:94:77:95:7f:79:23:d6:63:b5:ef:9c:4d:38:73:74:a3:13:05:e9:e3

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.amazingdebtreduction.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.amazingdebtreduction.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.amazingdebtreduction.com

Other certificates including the domain name amazingdebtreduction.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.amazingdebtreduction.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 313785998045526444727940007160924201733905
 . . . . . . . . [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 2019-07-26 10:10:22 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-24 10:10:22 +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.amazingdebtreduction.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 824765545008248860275951208031748219841791158560357358650990028595232835736978881800140586778825029585405006285714670048626574548656730253873383448942318746387523780171032635306335943857064544112036643263876736363283019343890709434619511269303013425517456272003271646464727897967634117501513814432086497052991910567815154605422401874234606733597606023892055688372188284478969869756360823402001760426793349275287278834624012237618974676299828600312743137280736214451652492760229604938183061972823664751907649932628299719302163573688792599478700911818061617387064749784307511788954886193187350134145350922147617250971304064971895146645522697019845182142064975789769668738669621112815154065890862388857916132802577603875120603793470651589848012309547909584037618622947056856830617218623731095549576143939101824044378145551412255420525304231864931220715555997174433641221227442601611569786597029331036124978923896079689662110874061759975743179528725009139743344415553178364208329121328968898189791357594746171415526972902475185761390799050702313083921720192038209653403457686582097322225734225859466318455240691949677722704119914334932843630599197596561850292163788362798013817257056941922315645295464704302233328353287896917599563578337
 . . . . . . . . . . . . . . . . . . . . [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)
							7856bcc0a65122226cbd2b0c86265ee65194da1a
 . . . . . . . . . . . . . . . . [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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.amazingdebtreduction.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)
							00ef007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016c2df984cf0000040300473045022100e3ded4d54f9e6f62b518d8a07c7bb14046bde67141a747517b310abdd09f437902205efe5ba7b558818ed3cd1ed04df837ec7eebd8d8a8164ea4aee995977d81528300750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016c2df982c500000403004630440220711b41fde5c6d5b49801eef9161cc863dc8344cc46f4e36fd4b141b737feee4002207581699c88900f2e8cb6b37cf60334ebf8171865e094a50c3c777277a7b08537
 . . . . [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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