wto.rs

Issued by cPanel, Inc. Certification Authority

About this certificate

This digital certificate with serial number 7c:81:cc:53:4b:dc:8f:5c:a5:3f:d2:2d:bd:dd:39:13 was issued on by cPanel, Inc..

With 6 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=wto.rs

cPanel, Inc.

Organization: cPanel, Inc.
State / Province: TX
Locality: Houston
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 7c:81:cc:53:4b:dc:8f:5c:a5:3f:d2:2d:bd:dd:39:13
Serial Number (int): 165498221983055211053190085751672224019
Serial Number lenght: 127 bits, 16 octets

SubjectKeyId: 05:e3:26:be:e5:40:19:c0:87:53:f1:53:83:15:14:ee:26:ed:14:a7
AuthorityKeyId: 7e:03:5a:65:41:6b:a7:7e:0a:e1:b8:9d:08:ea:1d:8e:1d:6a:c7:65

Fingerprint (sha1): 6f:92:f2:18:0d:03:df:27:29:94:2a:7e:2e:11:aa:0a:c2:a6:fe:a9
Fingerprint (sha256): 11:72:72:21:92:43:7b:2d:df:86:5e:29:6f:94:cd:2c:fa:26:6d:46:fa:d3:25:12:a0:d3:00:fd:e5:c9:f1:04

Issuing Certificate URL: http://crt.comodoca.com/cPanelIncCertificationAuthority.crt

Revocation information

OCSP Server: http://ocsp.comodoca.com
CRL Distribution Point: http://crl.comodoca.com/cPanelIncCertificationAuthority.crl

Check the revocation status for certificate wto.rs

6

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for wto.rs

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

wto.rs
autodiscover.wto.rs
webdisk.wto.rs
wto-rs.wto.mycpanel.rs
www.wto-rs.wto.mycpanel.rs
www.wto.rs

Other certificates including the domain name wto.rs

(limited to 100 certificates)
wto.rs
wto.rs
wto.rs
new.wto.rs
wto.rs
wto.rs
wto-rs.wto.mycpanel.rs
new.wto.rs
wto.rs
wto.rs
mail.wto.rs
wto.rs
new.wto.rs
wto.rs
wto.rs
new.wto.rs
wto.rs
wto.rs
new.wto.rs
wto.rs
wto.rs
wto-rs.wto.mycpanel.rs
new.wto.rs
wto.rs
wto.rs
wto.rs
wto.rs
wto.rs
wto.rs
wto.rs
wto.rs
wto.rs

Certificate

The complete raw certificate details for wto.rs in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6AGmwQqZa9pvATm90SlP
6bZVp8XFFctyC04zqOcClzNUpR6Jhj+A7ydfzv63SWLopHGhyYgW+Q8pPugCEgI4
IwNP6bPLqFcyaS9BnZKewfNRcl+KctqFcZxnNKVFomh4OcpdKDWA8b9Ps3odIdj9
HOgQ+TFNa4WvL52x0EV5E6XIppljyBcuYH5Roa6/l2+YSUwWnNWlSrCd4dqFCQ59
mxXZVJguRG/rWGUi1OZtA87ft5hNZvAivjxsYh1lAgmkUe6BVkW1GjMQsb63eL+m
sjLjJp1XGV4w+WPt0mNY9fl81RpgCyym4N4/lexUmDnakve0nWlFtWCO1mVdleCv
DQIDAQAB
-----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 165498221983055211053190085751672224019
 . . . . . . . . [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 2.5.4.8 (stateOrProvinceName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'TX'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Houston'
 . . . . . . . . . . . . [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 'cPanel, Inc.'
 . . . . . . . . . . . . [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 'cPanel, Inc. Certification Authority'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-05-23 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-08-21 23:59:59 +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 'wto.rs'
 . . . . . . . . [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 29288101079471785948736951450853512671766890474937303513555020017800099603048641210798970082340562119027028523929373580258108593478917979193180564166796965759467792772535152040032920481638016628152996579845930875564262226987584330215301709603734356048831595913254223054178663463340347668950131354609889665169407681021857045233717364637371193755855099470713046973196268035136157333166257607532893324406599716338921667914823822706302468430892127220864081194239289139618120885533228148563535941656878820341382951010423949868721104345351744889549638894651776221274885237947039905428999812414863480918370811889615984701197
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 7e035a65416ba77e0ae1b89d08ea1d8e1d6ac765
 . . . . . . . . . . . . . . . . [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)
							05e326bee54019c08753f153831514ee26ed14a7
 . . . . . . . . . . . . . . . . [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 2.5.29.19 (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 2.5.29.37 (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 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (72 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.6449.1.2.2.52
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'https://secure.comodo.com/CPS'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [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:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crl.comodoca.com/cPanelIncCertificationAuthority.crl'
 . . . . . . . . . . . . . . . . [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 (113 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crt.comodoca.com/cPanelIncCertificationAuthority.crt'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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.comodoca.com'
 . . . . . . . . . . . . . . . . [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 (111 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wto.rs'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autodiscover.wto.rs'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webdisk.wto.rs'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wto-rs.wto.mycpanel.rs'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.wto-rs.wto.mycpanel.rs'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.wto.rs'
 . . . . [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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