kaczmarek.io

Issued by R3

About this certificate

This digital certificate with serial number 03:cc:08:63:6f:a5:2c:0e:7b:fc:a1:50:e4:18:00:ad:f8:22 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=kaczmarek.io

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 03:cc:08:63:6f:a5:2c:0e:7b:fc:a1:50:e4:18:00:ad:f8:22
Serial Number (int): 330765610772941208432412500889180671178786
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b2:d0:a4:e8:69:ca:41:9a:07:b1:74:33:1b:ab:af:be:6b:e7:9f:0c
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 1f:cc:d1:8b:db:5f:5b:f4:9e:6d:ca:61:8c:80:e4:60:eb:f6:53:1c
Fingerprint (sha256): e5:7b:97:10:73:81:88:46:04:32:2c:60:20:c8:34:02:02:da:9d:67:a7:5b:94:f8:ca:e2:a9:a0:6e:22:c1:c7

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

Revocation information

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

Check the revocation status for certificate kaczmarek.io

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for kaczmarek.io

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

*.kaczmarek.io
kaczmarek.io

Other certificates including the domain name kaczmarek.io

(limited to 100 certificates)
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
kaczmarek.io
kaczmarek.io
kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io
en.kaczmarek.io

Certificate

The complete raw certificate details for kaczmarek.io 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 330765610772941208432412500889180671178786
 . . . . . . . . [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 2024-02-08 12:31:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-08 12:30:59 +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 'kaczmarek.io'
 . . . . . . . . [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 852608084652671309143785400340068672138194934984291995942216840065758480992869158887676148010343160424591396352370374744572455897733640238909957974769682634659344500860830993395114373750395072716417708504715047099938393514534164594152699802062231076195073367455345985952833243056048758801937189910373167275364861612566961215071727200546774548157724841542012166484787471473533788893746156606268841231095147946882387610387657763178390109019175842818367173647281746467428618695283929733581733805985806696159766031548875048085067801738130297388092669722902922997976189391261338881712460291899618708287873859091966867580281626931415490821150000803416354954145228779763425504579550671108134050593769975405211110516332862908039896601451721338700489324784980959238881271513278193818715494650648044136939928629285962351133275928848229962517471325394318329453984412854592018289794413156749089218624119144113136219101544342649000690068923335031870261615055307563769040928943566812665347677023609184848151697624454583538802159199428504245771104061693214674267311115678508543611948749489172188129920387518882595937075053886051148185426106104124442168682790921009292777432005031460035956791994673965775155491201363546311117921939182451993976239983
 . . . . . . . . . . . . . . . . . . . . [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)
							b2d0a4e869ca419a07b174331babafbe6be79f0c
 . . . . . . . . . . . . . . . . [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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.kaczmarek.io'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kaczmarek.io'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018d88ea1b8a0000040300473045022017251959e772a0033f8602b17157c634aeb2b69a4c81a8badbfcaca76fa4bfa5022100927248f5fe0ca8d81293c5c416d6e82bdce156dc2fac858c88900a3273748d73007700eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018d88ea1b7a000004030048304602210084a26cdf5518ef8760b94eb92215d36e70678a435ffddfd2d43732f02381e6fd0221008932e9bc7e1f6adaece37116b34257f4f431913a883ccd0682e4b5f22e4b4354
 . . . . [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)
		00364b7534818998ca55b1ee0fcdeae32ec9ee9f52d50524e8ffbb81dfe4030cde7a56d2d062bee8f191846ff6b570c8ddee9c8eac777d28cbc436a34c23ff21511e38be7e3c90d9791314228eb7b622fe63dd103ef6cbfb6a310182a8814f9877935f84b6139de959fe131904c655e777a9ac2bfd1c38d52331794df45a7ead46ff8eb421a4c5c43e79daf6677db7f9c4943d8b23ea24b19a17e37b099aed28a017b52e5f0bb872047ab1882e1695c0abc981189027697fb0adee4976fd4dbb9751b413a38a21232e4b563361b2f9feecb4170b0e3bd6efe6e6f03663d2c032c5252b68ca8562465b284b18ed2fa9325d1b9c6f48b77cc0efec8800289cd66b49