alfs.com

Issued by R3

About this certificate

This digital certificate with serial number 03:9c:9b:6e:8a:67:18:bf:48:97:33:d8:f3:76:95:37:67:1a was issued on by Let's Encrypt.

With 5 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=alfs.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:9c:9b:6e:8a:67:18:bf:48:97:33:d8:f3:76:95:37:67:1a
Serial Number (int): 314627511334088925962263950793897099618074
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b0:0a:1c:02:95:5c:c3:c9:c5:1a:fe:8f:e1:71:83:9f:22:db:d9:c8
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 21:5e:d3:11:87:d4:55:1d:0b:6d:9e:38:73:26:a6:22:92:32:d7:1a
Fingerprint (sha256): 72:a5:e1:df:d5:ce:1c:30:40:1a:7d:29:68:f7:94:ed:1a:a6:7e:65:38:ba:b0:a0:ed:64:9c:68:77:7f:71:fd

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate alfs.com

5

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for alfs.com

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

alfs.com
alfs.tech.on-rev.com
mail.alfs.com
www.alfs.com
www.alfs.tech.on-rev.com

Other certificates including the domain name alfs.com

(limited to 100 certificates)
alfs.com
aclf.com
macramblins.com
alfs.com
littlesoftwarebarn.com
aclf.com
alfs.com
alfs.com
alfs.com
alfs.com
alfs.com
alfs.com
alfs.com
macramblins.com
alfs.com
alfs.com
www.alfs.tech.on-rev.com
alfs.com

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvpeKwTQIEMXy3ZdetqO8
cyH+hRD/MDdytP79J8fAGcHekeV2hTjTZcB705cHF1W5zmX8+5u8zUmKGwrLs2rV
QEF4G0vRpOk4O9Rs/GbdIzstiM5oe1CYOnZ2m9iaz3QsJqQFApvejAU4HA2i2KPv
92elCLpg2dll9Ko1DluFM8iWLfMS+SA92meNeylDGEGhtRpQfUVnGOXJXnXbvm6/
Op5aAxy1J7BBiDgQzsH+tlfN4bKQPhJ66IJNXQpdjfkXCYazua+UsYxETuwkGB3V
S6ScWdxT87D+kiHkXb/AR5ntPTysuluelv33//lVZsa9AhFvtV1TtLL2Rm7Ph6I0
cwIDAQAB
-----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 314627511334088925962263950793897099618074
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-04 02:14:40 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-03 02:14:39 +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 'alfs.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 24060006094108476797807511972368170477196602713596188724589967860904904028320651019490286586720669620378768315260169320189795561694118200211651541056872457053020823228015278076133578771441730793743653296145143785586879789242032793599066368319861609046867542041558490651869146304531721848172616335520463192175409626145393704760316311621771732718378520406795621821172212818011008288186573389642834641697283060007876224904912793324957506470610088438378287432230830936734774421366337264935831755364168351866594217502590107447942495239613109626313734790976929355884631809415206111371633473067709853227053222304589801469043
 . . . . . . . . . . . . . . . . . . . . [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)
							b00a1c02955cc3c9c51afe8fe171839f22dbd9c8
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (89 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'alfs.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'alfs.tech.on-rev.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.alfs.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.alfs.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.alfs.tech.on-rev.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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f000750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018ea719f53300000403004630440220754635b71c438e32577e4c53f71e98ddfdb75bb1ffc919fda7207595568eed0e02204ace8c43ed6184b94ddfd726cc3341129f6d7dddf6ccb8d8c3a17685da453a7000770076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018ea719f5800000040300483046022100cae17aea0d57350fafbf4a8ca942b6cf55c45c2af78b1d403ff886a02c842f30022100ed0bd5421124faec2e5f6462458beba112a98c843e8037feeb457121a5e518f8
 . . . . [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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