obt.org

Issued by R3

About this certificate

This digital certificate with serial number 03:bf:b7:ca:6a:e9:55:51:05:aa:c9:15:2c:42:24:4c:9a:17 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=obt.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:bf:b7:ca:6a:e9:55:51:05:aa:c9:15:2c:42:24:4c:9a:17
Serial Number (int): 326575089612796034129787735535782227384855
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: eb:44:f1:05:fa:1d:4c:c6:be:a4:83:3e:be:74:09:6c:e3:21:cd:99
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): ff:9a:c4:df:a4:a5:c7:dc:e6:6a:a3:1f:11:64:01:34:cd:e1:52:83
Fingerprint (sha256): 0a:23:15:dd:49:d6:1b:1b:3d:2f:c4:44:35:a9:32:43:b7:db:37:96:db:bc:f3:6d:2d:e9:d8:8d:da:a4:86:b2

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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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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school.obt.org
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obt.org
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obt.org
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www.obt.org
mail.obt.org
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obt.org
mail.obt.org
www.school.obt.org
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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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsHPWMPS7K6Aho/zbiUxn
Kk+egwJ6GJChQvtY/TpTbunw2KfoXde1dbOMn/0ed5VVMmGTdMk45e2Y+hdBFH9p
++JwN0Urw9QsAQtnhrX6gu3E84ZFNrilbEcSll5jP2ux0dSr6kfzUCRnQxZ4nq7X
BxWBANhBFh0rWI8OIIS4kd8CQV0wLo6zJHg8Pg1wfq9lGyaLkyPJ8+JcyCaJX5ms
uOj/ZUgVzLalOBrcXk6eHLQp2Sag87dg7idSCcR2nV9fGYBLEL1VZ+YbptUZlpHI
HraVi+tMweBMR/HaKW1+qBT+sFc0+A8fiPRKKXb/LATJdDvFhZqkqax3HQ1oj4aa
nQIDAQAB
-----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 326575089612796034129787735535782227384855
 . . . . . . . . [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 2023-08-11 20:27:08 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-09 20:27:07 +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 22275062872093906040672886859552065900400688098879029339942352899753959585709339009965076258801761270914167150043898132263545539101378207693439365329690824416823442949769078832973287937385289814062300503529116813428094095745074258034988326456907807791550700881995507689353735838335352504233927024052256964474043455544481429248861723040730604951246937984744408512698188234989308669694357427818481357304180953695449643713288480148989384771545138667122499202071105866063630576497815933232004072010780836768846556867214164525670421942159313254108134536480546784508386301811599256495929681467020130390242504539740528089757
 . . . . . . . . . . . . . . . . . . . . [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)
							eb44f105fa1d4cc6bea4833ebe74096ce321cd99
 . . . . . . . . . . . . . . . . [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)
							00f00077007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb5200000189e67ef98a0000040300483046022100ce269cb59e18a955aff597974d86831eeb30f7132858e87c48147194daab954402210098ae0a1d6c83abbba54fdd3ae85064ec2bb8b552be2185d297244f3a53711244007500adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a00000189e67ef9a40000040300463044022000f7775d9cf86ed71acde1f3e24cb8cad412303390ed26a57f0985bffae636f902204d76ae8a48416b4d32fa20aec9728fbfee7bb3cb0112e8d94c5c614238f3479d
 . . . . [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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