47503.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:d4:cc:43:36:5e:f2:b5:75:1c:b6:ab:0b:a5:f3:19:3c:0c 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=47503.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:d4:cc:43:36:5e:f2:b5:75:1c:b6:ab:0b:a5:f3:19:3c:0c
Serial Number (int): 333748231080322019480158319805096468757516
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: fb:4e:13:64:dc:96:d3:2e:db:e0:7f:61:4e:a6:93:39:7e:96:7d:6d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f0:f4:5c:ca:b5:91:d3:f3:57:f7:62:ab:10:15:d3:e7:96:49:37:bb
Fingerprint (sha256): 82:f6:43:72:e9:3a:8d:11:78:0d:aa:45:9f:98:46:0f:86:8e:46:a9:1e:0b:de:b0:68:dd:10:2f:65:0a:92:7c

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 47503.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 47503.com

Public Key Algorithm

RSA

Key Size

4096

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

47503.com

Other certificates including the domain name 47503.com

(limited to 100 certificates)
87352.com
47503.com
47503.com
47503.com
www.44091.com
47503.com
47503.com
47503.com
47503.com
www.47503.com
www.47503.com
www.discount-pills.com
www.47503.com
www.47503.com
bookers.bid
www.47503.com
www.45084.com

Certificate

The complete raw certificate details for 47503.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 333748231080322019480158319805096468757516
 . . . . . . . . [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 2019-07-27 18:05:12 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-25 18:05:12 +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 '47503.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 935853759928152519571528013987854823019941314203888758531424460912372103614666635579193786764911837493446063342577065042698764816030743576080314197595353066162911705329519378525282052652736567944910858499786378984952325822069706317039064199540129270593145804210543685354588384594776829955926396637115843093308145109769977363916602720391645956047880048171830862866408112826401466070474555495248624031946017967911659962034687708069205123283050400454258015012441758465005653750447055387415573069660064033620055977685681705188432743482490812245533148607371115320431294141002858910646497073885427347860557422102124105691473857117807971051769411800852700854595177107873279001781560239869375526237877152088969631775497261927964445905747895679497690303732304616987100133333517976536493135939473708886500693233067606961212868968824101500673166633899913395640650337274168828412117834294415550608325354086037433975442833570065032556939147478324165973930673832631993500502059842692306060386796456726616542432309314153930463768913971784703580222237000567367378736939074651933925773239449302509423628447595385504689138078802942453565116126238107476462598038853182411930185914560744750265341167484944550238360737986117588186323263575028387283529659
 . . . . . . . . . . . . . . . . . . . . [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)
							fb4e1364dc96d32edbe07f614ea693397e967d6d
 . . . . . . . . . . . . . . . . [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 (13 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '47503.com'
 . . . . . . . . . . . . . . . . [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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f20077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016c34d29a860000040300483046022100879276d6add4b7e8306b245012f3b88231f34c12b3b9fcc5ad74d80f18780ee9022100e34b7264109bcdfc13154c1c7abbd9207833a4981a2de8adf03eff3c5b8b023600770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016c34d29ba80000040300483046022100d8ec59f8fa9aaaad4ce122953aab9bc1f56abf470a024fcf08f090749cc3ba8f022100c99db3666b9151682775b09b3e9570874a634944bcafdfa8fc4fe0397efe58f4
 . . . . [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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