l.warnet.cz

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:c9:0c:f6:ef:e0:a9:f0:47:e8:00:2b:f1:f7:23:e3:c2:5d 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=l.warnet.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:c9:0c:f6:ef:e0:a9:f0:47:e8:00:2b:f1:f7:23:e3:c2:5d
Serial Number (int): 416863132384421833425073993341012917076573
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: e4:61:a9:57:04:11:36:fe:e8:43:7b:26:9e:13:81:9d:d3:27:6d:f5
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 43:b1:71:5e:7b:f1:79:2c:9d:48:cf:57:12:a6:93:e3:13:f0:3c:bf
Fingerprint (sha256): b1:b4:ff:0b:8b:24:02:6c:cb:28:75:69:c6:e7:c7:8f:4a:06:ff:20:b4:a1:5f:84:95:d4:3a:44:8c:45:6c:04

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 l.warnet.cz

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for l.warnet.cz

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

l.warnet.cz

Other certificates including the domain name warnet.cz

(limited to 100 certificates)
l.warnet.cz
l.warnet.cz
admin.warnet.cz
l.warnet.cz
admin.warnet.cz
sprava.warnet.cz
l.warnet.cz
voip.warnet.cz
admin.warnet.cz
l.warnet.cz
*.warnet.cz
l.warnet.cz
*.warnet.cz
*.warnet.cz
l.warnet.cz
l.warnet.cz
voip.warnet.cz
*.warnet.cz
l.warnet.cz
l.warnet.cz
l.warnet.cz
voip.warnet.cz
l.warnet.cz
l.warnet.cz
voip.warnet.cz
*.warnet.cz

Certificate

The complete raw certificate details for l.warnet.cz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu8ooqKE601WO6UlJF7bD
RqlWn3WMfKd8KzzAF2Gg0jY4ejd4ij0k3AKe506K2TvK+l+kvkCwD8YOQcycNIpO
hyGQftHsLhV8TThhfr0P7gnj1AK93rlBFPTBCQnBZZSb+jWxXJX0kg1oykzG2w3u
xLSajKyIbLBoEHEIdp1XUK6or6ySYzYba+amKiu50Z10/RelC//1ZbrqL4+wRU5H
ByQEID2wAM8s9iMV9z22PYG8HOPjZMpkIirYWhd9ATf9yFFd6TOiTDW6zoXy9TqK
ow9s0lZwS2UnzdVoKEeWGz7whVEsSr58A4a+uceaDFZ6IEsND2tVo8LWww3o2b1E
MwIDAQAB
-----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 416863132384421833425073993341012917076573
 . . . . . . . . [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 2018-09-18 05:41:33 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-17 05:41:33 +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 'l.warnet.cz'
 . . . . . . . . [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 23706251259748222318158679378940543905003420360727786784798072905742325317573543975162157247952329618615544385164929508614482517550089857604911010605219758755319462009066154051562440660980802243177692716504732835945501277639472805058776230479989028108107640963652508699909899720795286774963673273935292688114889274270223674779567857589976279284082106349457844748566647127830512344162880786389050133190315259110265248355747497576251139941104955285244676981731065281224315717574509838056680895301110957929371363788035513728987056911537510545205793942592654668663439323730797800304608490301198806221170722607790273938483
 . . . . . . . . . . . . . . . . . . . . [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)
							e461a957041136fee8437b269e13819dd3276df5
 . . . . . . . . . . . . . . . . [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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'l.warnet.cz'
 . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . . . . . . . . . . . . . [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)
							00ef0076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d91300000165eb69a481000004030047304502203e4b19a83399809049f2eb9deecf428a4a017a65c28d51fc62fc531090fee3ba022100b4311aad3cb3d8ef0990742d0c74b8c25419fef1d61d8a6d4d52108a3123fd37007500a4501269055a15545e6211ab37bc103f62ae5576a45e4b1714453e1b22106a2500000165eb69a445000004030046304402200cad660b1d780c9a1c7347391ac1889c7ae62348164e9816bb2ab81fb8cc2903022058ad986ab5be89b678a67b9f25d9f93a9015cd53a0ea5d3dd6eff968bad49e3e
 . . . . [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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