atwell.lu

Issued by R3

About this certificate

This digital certificate with serial number 04:bb:a5:c4:f2:7d:30:fe:91:5f:12:2c:99:09:5f:f2:91:aa was issued on by Let's Encrypt.

With 2 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=atwell.lu

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:bb:a5:c4:f2:7d:30:fe:91:5f:12:2c:99:09:5f:f2:91:aa
Serial Number (int): 412302291569007070631504751508593222783402
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 25:fd:42:53:d0:26:6e:7d:6a:c1:5c:79:92:13:bd:c5:11:ac:75:d5
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 18:49:6a:b3:9b:54:2a:a5:27:6e:7a:0f:21:0a:6f:46:59:fb:c6:45
Fingerprint (sha256): 5a:17:dd:ba:d8:d8:54:a6:4e:2d:74:be:c6:bf:b2:78:7c:46:03:37:1f:94:43:ce:a8:99:02:fc:95:10:ae:96

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

Revocation information

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

Check the revocation status for certificate atwell.lu

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for atwell.lu

Public Key Algorithm

ECDSA

Key Size

256

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature

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

atwell.lu
www.atwell.lu

Other certificates including the domain name atwell.lu

(limited to 100 certificates)
atwell.lu
atwell.lu
webmail.atwell.lu
projects.nexusimprovement.com
servicedesk.solosystem.co.uk
atwell.lu
support.westhost.com
projects.atwell.lu
projects.omerosystems.com
atwell.lu
service.idenprotect.com
atwell.lu
atwell.lu
it-support.cairo3a.org
assist.east-diagnostics.com
atwell.lu
atwell.lu
atwell.lu
support.westhost.com
projects.swish-it.com
hr.growthmode.co
atwell.lu
atwell.lu
autodiscover.atwell.lu
service.idenprotect.com
atwell.lu
atwell.lu
atwell.lu
atwell.lu
support.fortress-cybersecurity.fr
mail.atwell.lu
atwell.lu
atwell.lu
projects.atwell.lu
atwell.lu
projects.atwell.lu
podrska.east-diagnostics.com
atwell.lu
projects.samepage.digital
webmail.atwell.lu
support.fortress-cybersecurity.fr
projects.atwell.lu
atwell.lu
projects.atwell.lu
mail.atwell.lu
atwell.lu
atwell.lu
servicedesk.solosystem.co.uk
projects.spitzbub.org
work.goboom.group
projects.lockeandpartners.com
atwell.lu
atwell.lu
projects.yarvis.de
mail.rtfc1.reachthefirst.com
atwell.lu
projects.swish-it.com

Certificate

The complete raw certificate details for atwell.lu in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEQoELlxYbbcZnxp+Y9Mn75XVW9wAx
W0FcB7Sl6KlnAPnGq98r207k3AZplkaJPVP37WckJDPg4+Sq9b0tpG9/3g==
-----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 412302291569007070631504751508593222783402
 . . . . . . . . [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 2024-01-01 05:14:15 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-31 05:14:14 +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 'atwell.lu'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.2.1 (ecPublicKey)
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7 (prime256v1)
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits)
				000442810b97161b6dc667c69f98f4c9fbe57556f700315b415c07b4a5e8a96700f9c6abdf2bdb4ee4dc06699646893d53f7ed67242433e0e3e4aaf5bd2da46f7fde
 . . . . . . . . [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 (1 bits)
							0780
 . . . . . . . . . . . . . . . . [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)
							25fd4253d0266e7d6ac15c799213bdc511ac75d5
 . . . . . . . . . . . . . . . . [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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'atwell.lu'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.atwell.lu'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0075003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018cc3a897f80000040300463044022041e85c423423741459249c4bcbd53eaecf98e6d4cdced9e4ef5c9268d248c86502205710583621c1fe14da14898d9c40414366c84b114ea7f766b4db9e840c9ff5df007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018cc3a89810000004030047304502203c35a4478a6a240c7e02c31f4050102af5fa6e89edde288781599382a8a01447022100acb82d51456f5fe444df85fb4462d96fcf40ab9567e3be4ff69153ab56cfaab2
 . . . . [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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