www.mishawakarealestate.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:aa:b1:bf:26:6f:ca:28:9c:da:2f:59:cd:3d:39:f0:4c:72 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.mishawakarealestate.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:aa:b1:bf:26:6f:ca:28:9c:da:2f:59:cd:3d:39:f0:4c:72
Serial Number (int): 319421126035382645037803892336984299949170
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 7f:55:ee:00:71:f9:41:fc:3d:a7:98:59:62:15:5a:dc:27:7a:1a:62
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 84:90:dd:5a:6d:a8:7b:37:12:97:55:0f:e2:ca:59:ad:d4:7d:10:78
Fingerprint (sha256): fb:de:68:af:0c:3c:43:fb:58:ac:7e:b8:7e:1d:9a:b9:ea:3d:04:50:75:38:40:93:35:d5:f1:42:30:5a:03:08

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.mishawakarealestate.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.mishawakarealestate.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.mishawakarealestate.com

Other certificates including the domain name mishawakarealestate.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.mishawakarealestate.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 319421126035382645037803892336984299949170
 . . . . . . . . [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 2019-05-18 02:00:33 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-16 02:00:33 +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.mishawakarealestate.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 746476429103295715265795396937833813236667878455234300504460406247203209333840482638781917034679595953018337782586612860676199498357818590099693704175263743739626890676477139447450539867862021760012987183075741642302261888002239108618390554596975286503794764257415475049764244765833494239448226603168635317210994878380813197064761511459041161501139675099133845713715151913832383935365219622609569362815722039682953581010839357390899951102349381836374711885506495150161430481193491437244641395588071495133922102168877995637935922584022851182142083826117553826483351294529149286799924007247546803613314102953652978405000388247356899724287716075478749951002149063115144988918697525149928171412411549654010900104324127903299981632203309596250844428043831538858641791029531363750571541116547787613496854246343101444945254981411549543305093370688850815714070285199864126351638267228197349312792068907943638425178317597074313161682368665515407218228907786617531845626358944447063437757961779597294331261410060320392038715466886239020858390688502611103711743254819764057064821026155081599457960713271238135479637713799856618572576643541008917615067903627310069232044885767889166599667146980468150345277631420432061400820859073459902405003467
 . . . . . . . . . . . . . . . . . . . . [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)
							7f55ee0071f941fc3da7985962155adc277a1a62
 . . . . . . . . . . . . . . . . [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 (31 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.mishawakarealestate.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)
							00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016ac8e2450d000004030047304502205adec66f2a427a0302f0789fa242ab3d367698ae340390210690ed06349a6268022100b82f48b9db30208869111a0e9eb14c39dfe52eac433e060858befe76dcc84206007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016ac8e24531000004030047304502204360fe814efb7208138912a81942bc5a050b9870238413d7950a231c1d4e9b9d022100ea8b616f39fedb8fe802991166e4d72142dab8c620a283ced0c274ee95d5ef6f
 . . . . [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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