mail.pc4all.co.kr

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:ac:6f:b7:c7:d8:16:56:76:62:4d:ea:97:56:8d:ec:6f:96 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.pc4all.co.kr

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:ac:6f:b7:c7:d8:16:56:76:62:4d:ea:97:56:8d:ec:6f:96
Serial Number (int): 320013923456859100617573182749836099481494
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: fb:11:df:4a:ce:22:c2:aa:6a:1b:eb:3d:cc:92:90:d9:55:d6:8c:0c
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 34:e8:73:e6:d7:2f:22:9c:a0:af:0c:9d:f5:a7:04:b1:ae:99:c0:0c
Fingerprint (sha256): e7:60:33:84:46:b1:ed:e3:ed:57:70:b6:8e:d1:12:0f:b9:b9:dd:13:66:59:0b:12:7f:8e:58:58:85:0e:50:85

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.pc4all.co.kr

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for mail.pc4all.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.pc4all.co.kr

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pcinnovation.co.kr
pcinnovation.co.kr
pcinnovation.co.kr
mail.pc4all.co.kr
mail.pc4all.co.kr
pcinnovation.co.kr

Certificate

The complete raw certificate details for mail.pc4all.co.kr in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFWTCCBEGgAwIBAgISA6xvt8fYFlZ2Yk3ql1aN7G+WMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMDQxODUxMzhaFw0y
MDAxMDIxODUxMzhaMBwxGjAYBgNVBAMTEW1haWwucGM0YWxsLmNvLmtyMIIBIjAN
BgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApTsGrgcjqkseN2pZYbcsbHvamgli
S5rmmGzn/WkiqeR3WrWyd4z096NzbdO0BVjyyeEN5r3yXOrnBusZ4LRrrfUFt5rX
0yCmh3eILirueEQ3qJJ7hfUkIze1ljkjri+CBdWd70jv4B2knkDXkHNnxqt7bTuQ
jXOyZvPUKeVqS11lZ43P+GGsxeqJuldVLAruGfWYD4hICwTltTswLRNqbLgzd0PQ
38DD2zMQnPs/NSwkOyB8IiiQfInhCzPvrk+hgHgreGJL2pyC2vdkXtLxH8PD2Oyt
ZowPZkwpBejAhIKSWE02ZhV5liCzCk8uHGcWf2Zw6q9M5Z27O2kyTmjREQIDAQAB
o4ICZTCCAmEwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggr
BgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBT7Ed9KziLCqmob6z3MkpDZ
VdaMDDAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcB
AQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlw
dC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlw
dC5vcmcvMBwGA1UdEQQVMBOCEW1haWwucGM0YWxsLmNvLmtyMEwGA1UdIARFMEMw
CAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9j
cHMubGV0c2VuY3J5cHQub3JnMIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHYAXqdz
+d9WwOe1Nkh90EngMnqRmgyEoRIShBh1loFxRVgAAAFtmFPnrwAABAMARzBFAiEA
shDbHscvt27+LO0STPs6J7cRS+2xgHJJUCZh+YoEu0sCICn1klKFX32csJzjHv09
4kLdN2IIApVK8G5oOK2BF7oiAHUAsh4FzIuizYogTodm+Su5iiUgZ2va+nDnsklT
Le+LkF4AAAFtmFPnzgAABAMARjBEAiAFTWHesNHxX3KOdFa1X3QTMJMdYDOqxAsg
9nzYNQg7KgIgG57ncnRvsWKsbselcMPobFdvFMnZZU4ZI+1SFUWrp2IwDQYJKoZI
hvcNAQELBQADggEBAFwAEi9npMJ6KHI/OnDIRiQyx7bPSb2wNX90lhVU7Ygw+NQ4
PDZaH6gf4O/JAGJeIWWqp0sazSO5hAq5yfSVWSmeRcCrIwnwtTsYQ6cBLi2oVRe5
BX4X/Cqm1oh26ffsJ2sUspoCedqW2njRc2GGKv/2afhepSntE/1Rsr5VSYvFb6uj
iIAUTrw20sN0ic1IR+wHWDCbAsOAkWyO87ie40WZ3tEbVuj3/OsN2euW9NAFNcZo
UsJ+qUsJPgz+qspO7WJHbiLi160xXu02s9DDkemzbLUBGoXiDHoRVVqJcgKGewfH
8hyJLBoY/HcfpFMv+YKpxm8TPpWwPmnDlWxc/10=
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApTsGrgcjqkseN2pZYbcs
bHvamgliS5rmmGzn/WkiqeR3WrWyd4z096NzbdO0BVjyyeEN5r3yXOrnBusZ4LRr
rfUFt5rX0yCmh3eILirueEQ3qJJ7hfUkIze1ljkjri+CBdWd70jv4B2knkDXkHNn
xqt7bTuQjXOyZvPUKeVqS11lZ43P+GGsxeqJuldVLAruGfWYD4hICwTltTswLRNq
bLgzd0PQ38DD2zMQnPs/NSwkOyB8IiiQfInhCzPvrk+hgHgreGJL2pyC2vdkXtLx
H8PD2OytZowPZkwpBejAhIKSWE02ZhV5liCzCk8uHGcWf2Zw6q9M5Z27O2kyTmjR
EQIDAQAB
-----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 320013923456859100617573182749836099481494
 . . . . . . . . [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 2019-10-04 18:51:38 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-02 18:51:38 +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 'mail.pc4all.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 20858427170662903829466422434287285435983473495240643920945027469279450942351407407705664435236831766449187484923579343604672305019874074165642046389757287051331315757865365782362276056161220424323683997499007733689206748214693275761954233764167206808727839930353601407988593798808444558832448875792045158980972613836486135338637604391533475260732227093331494699034859500176177120916259573457931240632766501558655329776122629026409607191135813483915564578291105880497260897925103834851176085133183535574133963232610809465146432515468514564866565271522324094447355497696634663217948221929242311694687073126269617492241
 . . . . . . . . . . . . . . . . . . . . [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)
							fb11df4ace22c2aa6a1beb3dcc9290d955d68c0c
 . . . . . . . . . . . . . . . . [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 (21 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.pc4all.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016d9853e7af0000040300473045022100b210db1ec72fb76efe2ced124cfb3a27b7114bedb1807249502661f98a04bb4b022029f59252855f7d9cb09ce31efd3de242dd37620802954af06e6838ad8117ba22007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016d9853e7ce00000403004630440220054d61deb0d1f15f728e7456b55f741330931d6033aac40b20f67cd835083b2a02201b9ee772746fb162ac6ec7a570c3e86c576f14c9d9654e1923ed521545aba762
 . . . . [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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