obt.org

Issued by R3

About this certificate

This digital certificate with serial number 04:fa:c5:dd:ce:6d:9d:07:d9:cc:91:ce:4f:6e:3b:fa:c6:fd 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:
  • 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=obt.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:fa:c5:dd:ce:6d:9d:07:d9:cc:91:ce:4f:6e:3b:fa:c6:fd
Serial Number (int): 433782745056911813780055982703726089127677
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 65:d8:10:9c:36:3e:2b:97:f6:ee:f0:f3:7f:cd:8e:d9:2e:78:10:c8
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): cd:e9:75:69:d9:c1:a1:a8:63:2f:05:93:45:69:cf:71:8b:c3:e8:17
Fingerprint (sha256): 1c:42:d4:b3:d8:a8:91:1b:ca:56:84:69:16:08:21:c6:cf:de:65:e5:50:24:e3:4b:a0:e6:86:ff:5f:41:ef:05

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

Revocation information

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

Check the revocation status for certificate obt.org

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for obt.org

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

obt.org

Other certificates including the domain name obt.org

(limited to 100 certificates)
www.school.obt.org
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mail.obt.org
school.obt.org
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school.obt.org
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obt.org
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obt.org
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school.obt.org
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www.school.obt.org
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obt.org
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school.obt.org
school.obt.org
obt.org
school.obt.org
www.obt.org
secure-uswe2-1.tessituranetwork.com
www.school.obt.org
secure-uswe2-1.tessituranetwork.com
obt.org
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school.obt.org
secure-uswe2-1.tessituranetwork.com
school.obt.org
www.school.obt.org
www.obt.org
www.obt.org
secure-uswe2-1.tessituranetwork.com
www.school.obt.org
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school.obt.org
www.obt.org
secure-uswe2-1.tessituranetwork.com
obt.org
obt.org
obt.org
obt.org
secure-uswe2-1.tessituranetwork.com
obt.org
www.obt.org
school.obt.org
secure-uswe2-1.tessituranetwork.com
secure-uswe2-1.tessituranetwork.com
secure-uswe2-1.tessituranetwork.com
secure-uswe2-1.tessituranetwork.com
school.obt.org
secure-uswe2-1.tessituranetwork.com
secure-uswe2-1.tessituranetwork.com
obt.org
secure-uswe2-1.tessituranetwork.com
www.obt.org
mail.obt.org
secure-uswe2-1.tessituranetwork.com
www.obt.org
secure-uswe2-1.tessituranetwork.com
obt.org
obt.org
secure-uswe2-1.tessituranetwork.com
obt.org
secure-uswe2-1.tessituranetwork.com
secure-uswe2-1.tessituranetwork.com
obt.org
mail.obt.org
www.school.obt.org
secure-uswe2-1.tessituranetwork.com
school.obt.org
www.obt.org
obt.org
www.obt.org

Certificate

The complete raw certificate details for obt.org in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqVYIiIFwhM8cJinPcb/z
pDnZ7vBVxiyUG9U4UIyUC1m088hvbLP4cW0w93WowgfuasLaPc8as8cHw20Ykhz7
A4cREYHqDs7eH70iUWWnmo+yzlV6Y5VM6ZP/x91SQQ6Wj95cGb+A6HkvJu8KgJ5D
oPQh4Zp5VTooqERJ86AKpTTRUprby4wSJ90UkLM+6bCWY4B0SbLASXzq+to/1nCu
hXtS1NPL4m1j7SQoDcwOgVKD66HRN4uad6Zu34suM6tz37DAypqPLpgDHAMZ99Er
8pOSnvfFgGjQGDQeCds2rYJu9r9RUE4Ig1zHehaDHVsxfHHkBkWmqNARVerVMrOj
2wIDAQAB
-----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 433782745056911813780055982703726089127677
 . . . . . . . . [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 2023-10-18 20:27:12 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-16 20:27:11 +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 'obt.org'
 . . . . . . . . [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 21376698156909232732758391449092121058765305320760372801985088516899768331623378541160254469336293081712466360609546503566363891228262950877972948763783550217376285033072893870955019511285727434403894968243066010428263768718437239296128451849234279621275708386735631056979661871543870637429263306808537526049132654284747536705547125430526341476636793620688814600716414898175134031268326588256740506097348377163480329779843746102501450103484612268786874067666231024012783190403864604963083022269533398055121966466453421838256138726548215095537640295470772751526000570631625960975722627269735007500504120862768085836763
 . . . . . . . . . . . . . . . . . . . . [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)
							65d8109c363e2b97f6eef0f37fcd8ed92e7810c8
 . . . . . . . . . . . . . . . . [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 (11 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'obt.org'
 . . . . . . . . . . . . . . . . [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)
							00f0007600dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b44af79dc000004030047304502210083710a486e3a377ecb69ad2aff14141496d3d00103ba05278a0728491fc7ac9d02201feb7e8ded3ed67c7c333d9af91663c73c1b74868fc794bec31a5cfe4bf53e9a00760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018b44af7a060000040300473045022100aa5f5e94d0f40f143f63d8e5c46c4fcc24aec87e70aebc2e7438134e85efedf2022030bc4c21c41a50f3b12cbc9ec003d0e990b0402ea8ec5fa0306b3754cea4f387
 . . . . [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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