www.unlockmortgage.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:df:61:ce:56:79:e1:ec:fd:e8:de:d5:53:9e:c8:1f:5c:9b 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.unlockmortgage.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:df:61:ce:56:79:e1:ec:fd:e8:de:d5:53:9e:c8:1f:5c:9b
Serial Number (int): 337349832101337766517394677156312787147931
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 66:a5:d8:d6:f6:5c:cd:68:39:31:b1:7f:09:85:cd:11:45:83:1b:ac
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): ce:aa:34:1d:42:1f:40:da:5c:17:c3:ed:ae:da:e3:7e:b8:44:b9:95
Fingerprint (sha256): e9:5d:23:e1:de:d5:02:4b:37:52:55:c2:c4:ab:92:79:86:f2:6a:50:ac:0b:d0:52:e5:70:e3:f4:1d:58:e5:f5

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.unlockmortgage.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.unlockmortgage.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.unlockmortgage.com

Other certificates including the domain name unlockmortgage.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.unlockmortgage.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 337349832101337766517394677156312787147931
 . . . . . . . . [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 2019-07-27 19:51:33 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-25 19:51:33 +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.unlockmortgage.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 949558312408027942622626485587409258283262439275452970404404465894980436301501807788653146686074674029090973273676076049297375412588246573771507262783241543544932705631159612373980768317246882027442483670525149550732094992081691247808112182705720664048213559821431906227190667103801684189898304109577215854217814935683441424846768711086736047031310925322920176031830317050314455451857713163223949788448313570235690517518410667959297308097460855822000748040461841153501419242412916967476982325830479288790345574786965006358329230054053991056929223423398177098791474998534158029211992896588653508302301104099658408186073789326669702733173506883758761837327718384916913105740505068535604366130972775769265501600234695112118181782703770005320316265624038352752240133453018928029302237525936014097910949232798095331546989854583990560121807872383186479467589539573902295817773438633637644079107779879551332621673254603882121541548224859058035651244314659907291526863806309347422345386415300099763543562790075850986965634381740463987587928216984045662742795118639716897160269723439435979365417483510382955930196001240650884673052886453162308977282115040441838224597680943460936368235168121509436215994131262567534522487417912613355264565581
 . . . . . . . . . . . . . . . . . . . . [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)
							66a5d8d6f65ccd683931b17f0985cd1145831bac
 . . . . . . . . . . . . . . . . [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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.unlockmortgage.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016c3533f82500000403004730450221008d4f07d4d09b5c0d78f9a1d1618273f947dffea3e4d673ef2a7d019529cf903a02202f5cc7689cef5b6522929f434e8a216af934b4f662772af6de63a06f191ffe6900760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016c3533f8860000040300473045022056ee94c20dbd2fd9c65bf7cdd7b02c0c62eac0e750277fddfbc6d32549054a9f02210090796e92c7660fc92ab5cd123f33dbeaa1112d5248552f9d69c0ba341ec51fae
 . . . . [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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