mail.120.co.kr

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:ee:da:93:a6:4a:d9:4f:7c:fd:79:fa:c5:4e:ec:17:9f:cc 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=mail.120.co.kr

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:ee:da:93:a6:4a:d9:4f:7c:fd:79:fa:c5:4e:ec:17:9f:cc
Serial Number (int): 342614599465993543098862371472294425370572
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 17:8d:b7:57:94:66:ab:59:cb:a6:85:87:d2:e8:6c:5d:80:d5:93:36
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 8d:27:6d:92:4a:60:9f:5c:30:48:5e:5d:ae:0a:26:c6:6d:ff:43:11
Fingerprint (sha256): 13:43:76:bb:8a:d3:31:b2:49:96:1c:cd:85:37:9f:ee:67:4e:bc:f8:51:63:48:5b:54:8e:a8:56:66:51:95:f7

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 mail.120.co.kr

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for mail.120.co.kr

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

mail.120.co.kr

Other certificates including the domain name 120.co.kr

(limited to 100 certificates)
www.120.co.kr
mail.120.co.kr
mail.120.co.kr
mail.120.co.kr
mail.120.co.kr
www.4rangg.org
mail.120.co.kr
mail.120.co.kr
mail.120.co.kr
mail.120.co.kr
mail.120.co.kr
mail.120.co.kr
mail.120.co.kr

Certificate

The complete raw certificate details for mail.120.co.kr in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6ec+58EzAf+ifPGGeOJH
/QpZAft+HVsxaJUV1S2BH2SWVhK9mSfWb7Kx+d3PXFKWLKX/CUQdw2oGLXAegTMh
JG/aLGukYJ8nHmv5NOKwHlmrEUQ9Xdu9IMq/txQE4wUzMDMLKhnYgUCC68CpvTeM
RP2C7wzhAjDcDJDW3OrPzSa7yMhzPAkyNMSgEWxEnCNEjhiPjrQ6s05NykCQ/LyA
ybGXmusk49PwvbrWQDCvP0WvjeX3WHBxDdN2NYB/nYyJUnSgGDm4V8wHLgpd6JE1
46b8yg6IGpP+cXs0hdMs4CN6XfGxj8BmC/uRp0+ODfgWeKTXJXk9SUE3JLZODBzE
owIDAQAB
-----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 342614599465993543098862371472294425370572
 . . . . . . . . [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 2019-04-02 15:03:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-07-01 15:03:00 +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 'mail.120.co.kr'
 . . . . . . . . [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 29527556573508209668827602629933410434686534419654708680511054892571637593430354445173843269161444119831555827349369327113488525945588067060788408869042009466706641123112288995367026884229620115891766430201908653292068611455528980252742385066744126680014979629085570177589018756095346488213068022382830769297959588572787280833938229909180332593329877341483330777367272640419272928221133059937316915524587959259175551784108500298382843964320036614971640863888355730783893467859917994330340416865547130122756977507016257913503711693850604771838275500734852699328935915732628697710314065850995660174124037721479515522211
 . . . . . . . . . . . . . . . . . . . . [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)
							178db7579466ab59cba68587d2e86c5d80d59336
 . . . . . . . . . . . . . . . . [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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.120.co.kr'
 . . . . . . . . . . . . . . . . [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)
							00f0007700e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000169deca18500000040300483046022100839ae6ec17bba2e979e43a5c279dfff59993b76b74a9754de725269f2baeb9a5022100c7cdb451b00d2e2521dbc5c20852d5e0757101edb23bb3b4caa18641b1d4457600750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d00000169deca189800000403004630440220420f8a5bbb48eaa1ad9f50c580bd0720f5b8331f6abf66bf86cd5e58123ec80c0220330c3bef3ddffecc330cbf2a2c3c87243f302b739a01122865c5aaac7a6fe1ab
 . . . . [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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