www.pli.gr

Issued by Go Daddy Secure Certificate Authority - G2

About this certificate

This digital certificate with serial number c3:ce:b3:e6:98:f7:b1:09 was issued on by GoDaddy.com, Inc..

With 3 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=www.pli.gr,OU=Domain Control Validated

GoDaddy.com, Inc.

Organization: GoDaddy.com, Inc.
Organization unit: http://certs.godaddy.com/repository/
State / Province: Arizona
Locality: Scottsdale
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): c3:ce:b3:e6:98:f7:b1:09
Serial Number (int): 14109412485588562185
Serial Number lenght: 64 bits, 8 octets

SubjectKeyId: 4f:16:e1:d5:03:91:88:e0:79:d7:b8:08:7a:ba:69:52:57:94:f6:d0
AuthorityKeyId: 40:c2:bd:27:8e:cc:34:83:30:a2:33:d7:fb:6c:b3:f0:b4:2c:80:ce

Fingerprint (sha1): 36:3f:a2:26:16:ec:f1:b7:89:4d:21:24:b8:f5:e4:f8:1d:9c:d4:eb
Fingerprint (sha256): 86:e1:c6:23:b5:61:b0:28:73:40:7d:d1:7b:5c:95:ef:c1:fa:c0:19:cc:60:4f:d6:b7:4f:23:ab:86:1d:d7:0c

Issuing Certificate URL: http://certificates.godaddy.com/repository/gdig2.crt

Revocation information

OCSP Server: http://ocsp.godaddy.com/
CRL Distribution Point: http://crl.godaddy.com/gdig2s1-125.crl

Check the revocation status for certificate www.pli.gr

3

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.pli.gr

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

www.pli.gr
pli.gr
apps.pli.gr

Other certificates including the domain name pli.gr

(limited to 100 certificates)
www.apps.pli.gr
www.pli.gr
apps.pli.gr
apps.pli.gr
www.pli.gr
apps.pli.gr
apps.pli.gr
www.pli.gr
www.pli.gr
www.pli.gr
apps.pli.gr
www.pli.gr
www.pli.gr
apps.pli.gr
www.pli.gr
www.apps.pli.gr
apps.pli.gr
www.pli.gr
www.pli.gr
apps.pli.gr
apps.pli.gr
www.pli.gr
apps.pli.gr

Certificate

The complete raw certificate details for www.pli.gr in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArjXper4fNrMb7yWcbX6u
ZaE8dKKT/fEGFBeSQh5Q8wkLZ/GFhH+1LIzs9RkLcXG6yb12lTh3WfVP30y2VcEN
ZjDFdWh1CVdoOKIqFyZv6nF26e/agrP81IX4mruv0qrnxYcC0cjjwacxv5/bLao+
J53On+oh2Y9lW2tOnIp56NnpD3NoY7AhTkdjBwfdJnWD/WfEHWArbJ8WlBWKMWat
m0sUTB23dncm036mhUaffdeiHVUU6TcpS75F4S49MgcIeVtUnL3a0XUzz7gYw3qK
vpNDjmdHGaYDFYwrQBi3VCJkKh4PlX8nAkohzVE76Z/2dFK8P9rXcsNwBhYI5wX4
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 14109412485588562185
 . . . . . . . . [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 'Arizona'
 . . . . . . . . . . . . [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 'Scottsdale'
 . . . . . . . . . . . . [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 'GoDaddy.com, Inc.'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'http://certs.godaddy.com/repository/'
 . . . . . . . . . . . . [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 'Go Daddy Secure Certificate Authority - G2'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2015-09-18 15:27:40 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-09-18 15:27:40 +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 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Domain Control Validated'
 . . . . . . . . . . . . [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.pli.gr'
 . . . . . . . . [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 21992050076507224352895575701152123462385747591242194368502239622071230872161996060336672625326858626089132334524527551615454384584899753046689716474749327048416689683965820564929873645528779719649481246334237067435405325371821675682768633843327708696029141556654680646561228823309205111026654920573455322384783102766266351754164656964983855659891242294111541622796432792028086644330478856499432855454303510004712794560869070166558338337288908268730785892612097554517818525147113299709185592033491444590635291403341920280222887606545913466800421609790327974322772004871329639686680304009417789135095864031224002902159
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.19 (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 2.5.29.15 (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 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (48 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.godaddy.com/gdig2s1-125.crl'
 . . . . . . . . . . . . . . . . [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 (76 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.16.840.1.114413.1.7.23.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://certificates.godaddy.com/repository/'
 . . . . . . . . . . . . . . . . [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 (106 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.godaddy.com/'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://certificates.godaddy.com/repository/gdig2.crt'
 . . . . . . . . . . . . . . . . [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 40c2bd278ecc348330a233d7fb6cb3f0b42c80ce
 . . . . . . . . . . . . . . . . [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 (35 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.pli.gr'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'pli.gr'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'apps.pli.gr'
 . . . . . . . . . . . . . . . . [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)
							4f16e1d5039188e079d7b8087aba69525794f6d0
 . . . . [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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