podenca.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:01:81:d1:7c:45:a6:a6:34:01:f8:7d:3c:d2:8a:06:44:4e was issued on by Let's Encrypt.

With 9 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=podenca.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:01:81:d1:7c:45:a6:a6:34:01:f8:7d:3c:d2:8a:06:44:4e
Serial Number (int): 261849698284238475835121207660667445068878
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 47:ec:4e:5a:8d:e3:d1:de:c2:af:b1:ef:1b:22:f1:f5:34:86:e2:db
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): cf:06:48:d8:d5:37:4e:bf:6d:83:77:45:cb:b5:13:e2:5a:88:b6:3a
Fingerprint (sha256): c2:89:f4:d1:a2:6a:10:b1:d9:5b:a3:73:d2:fc:9c:a4:ff:f5:8c:75:5d:1a:6b:45:bb:b0:f0:ce:e2:d2:c1:76

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 podenca.com

9

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for podenca.com

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

cpanel.podenca.com
mail.podenca.com
mail.podenca.com.cp-12.webhostbox.net
podenca.com
podenca.com.cp-12.webhostbox.net
webdisk.podenca.com
webmail.podenca.com
www.podenca.com
www.podenca.com.cp-12.webhostbox.net

Other certificates including the domain name podenca.com

(limited to 100 certificates)
podenca.com
podenca.com
podenca.com
podenca.com
podenca.com

Certificate

The complete raw certificate details for podenca.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwAVAyivCobwp/yI9uCae
tabhPZRO3lVZTDd7hrH7wsQK7Z54vjS9smn9GrOnNqmWHc/xCjAgYl6ZDGT3rDj0
/iGm0XLWK6dCBsS0Cn3S47kR16P+aN+nBciGe3ubEUWilrPnZURLFfWCXbFo3ZPc
rHpmrHRMk8B05RHMC99Du0K2pmfh2FLYliAU3PWjOMWxrfhjMGS6xxD7Z8z5AjBk
o2mqOcjmFH9qzvrgnpEFCvyVGoZkoLKZ2+DIB/fjWto1K+o63Dg3sSBtJjrliG9s
Kg8VeAp/wJnFT45t08ihW3ztRrbNB9VydL2jgb0E6jWCOTpd5BVfQD3NKMNx7N36
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 261849698284238475835121207660667445068878
 . . . . . . . . [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 2019-03-21 23:50:38 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-19 23:50:38 +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 'podenca.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 24240344946184669324744653159880295227185800861244364189183262920397987636091895427513701629138345218589999568779661307802932332833887250665104947443782113276358018349918367632611363567832891556000402768178745498294562900002004249016784581764564864034517989256238894699603795899698310078494228719650121250345473662259313142201773741456296715942701106810228384604459724510676837983875151282727970117821501933060191962508457102432656445563486267385617350233197985524223348636115371416186865123225957508192355527020968066766889744177720376042554643402188471952060930091274139705106184359617817079677447615505147080079911
 . . . . . . . . . . . . . . . . . . . . [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)
							47ec4e5a8de3d1dec2afb1ef1b22f1f53486e2db
 . . . . . . . . . . . . . . . . [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 (224 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpanel.podenca.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.podenca.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.podenca.com.cp-12.webhostbox.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'podenca.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'podenca.com.cp-12.webhostbox.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webdisk.podenca.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.podenca.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.podenca.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.podenca.com.cp-12.webhostbox.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000169a2e0daff000004030047304502203ec08720787bca7d658a6393fee487953ccc0be82ee0fcdc9fc7e6c7921e2f83022100ac7c152c537e802db224e10a1da9182d3c4686295a2b0d283e77ae46fd74cf18007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000169a2e0de9200000403004630440220757f26c06ea05232a0d84d1d7d1a90dbdd041943173ef26c68517dece63516ee02201978e4740e0d09993a983390e9844ebc4384cdcaf049907d61d4b5d05dbd9b93
 . . . . [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)
		000c322355a14210d97e9c1c991a7a68b5143ab23d643ec3da732cbccf11f41827d73b54d8ee58826b6427317854b0c98c99ffda09740e1d5234ebb4ebec0c2fec496110b291a877d54f943649b44c49cdd3397a475e49d3e110fcc29de5b83c995c722c281ba8aebf9ed1b1ad52a34f964cd6dbdb6915b3b7fc7318b0c6d07c70947c5a3f93ff99fd788f8deb79dbbeb3831d9ba467ead97a99a99caa8956e10329da26a199cb1ef328c00b69ce56914a425c18aa8575646f301cb6a91f63685df79ab27c3dffe67a16c52efcca9b1fe68f6af1e8809935df31e929c20ef5b597368b65245eccec353fd479645d31916884e02719e4947ebd14343c924ed91e6b