o4s.io

Issued by R3

About this certificate

This digital certificate with serial number 03:75:03:1e:17:25:2f:e2:b5:e7:20:f8:6c:1f:6a:90:dc:19 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=o4s.io

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:75:03:1e:17:25:2f:e2:b5:e7:20:f8:6c:1f:6a:90:dc:19
Serial Number (int): 301154038647365333726259038327475354524697
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: a9:e6:1b:b7:19:c3:54:9c:2f:ef:21:27:48:b5:f3:e6:b9:3c:b6:81
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): db:2d:20:7d:6a:09:53:76:59:a0:fb:d8:d1:e0:fb:3b:eb:93:e1:85
Fingerprint (sha256): 30:a2:17:c3:3e:b6:36:8c:f7:87:69:30:08:73:d2:17:91:75:1e:57:43:71:40:83:ea:02:31:50:ef:f8:b0:fe

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

Revocation information

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

Check the revocation status for certificate o4s.io

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for o4s.io

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

o4s.io

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Certificate

The complete raw certificate details for o4s.io in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIE2TCCA8GgAwIBAgISA3UDHhclL+K15yD4bB9qkNwZMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yMzEwMjUxMjI2MDdaFw0yNDAxMjMxMjI2MDZaMBExDzANBgNVBAMT
Bm80cy5pbzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAMhqStojTIbo
lWImnSABtHr3baHAbh3BRj/MNL0/CdhfF3IZbehvgVGT1YtAY25oLaElUwpML1zn
YQGyKYrUoo2pGy1Qtl7G9dk9FNp8TpzdVrydA2KWJJA7OoujbLXezHdVzIooE9IX
nJzLVJeNpiRuhUUkp04KAE3fHB4T4/8IgfcXr2jXqwJmt3Njk12O08iD9gU1DKY1
2lrwJDjB1XSTJvGJRE1110o9ZRaVV1orox1cZ1kLdUbaF42iL48UyuPLfRIHsZpM
+Nzx/6KvX/Ur+IuqlZm5Bcb7j4ZtdI8mGtu/eC0RJMMFvkeXRdoJoTOfLppWA4dR
+A9tN7N/AksCAwEAAaOCAggwggIEMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU
BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUqeYb
txnDVJwv7yEnSLXz5rk8toEwHwYDVR0jBBgwFoAUFC6zF7dYVsuuUAlA5h+vnYsU
wsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8vcjMuby5sZW5j
ci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9yZy8wEQYDVR0R
BAowCIIGbzRzLmlvMBMGA1UdIAQMMAowCAYGZ4EMAQIBMIIBBAYKKwYBBAHWeQIE
AgSB9QSB8gDwAHYAO1N3dT4tuYBOizBbBv5AO2fYT8P0x70ADS1yb+H61BcAAAGL
ZwOMQgAABAMARzBFAiBqBC/SMhBdm0GJNCFpuW49frw7yFyX2UickpxJRd+2jQIh
AKNKi3KrmBj2GZpqhNXesxjAtFQ4UxlEbHGnTiChM7BoAHYAdv+IPwq2+5VRwmHM
9Ye6NLSkzbsp3GhCCp/mZ0xaOnQAAAGLZwOMfgAABAMARzBFAiEAlPwHzK1VnK5v
AxBDtP28sRqAUd9Jk1nX24SOLNvcPNsCIF9Q6e1A8OdguwDUoJKWkvbWHvsi4QxV
3ESRlL3YF0BFMA0GCSqGSIb3DQEBCwUAA4IBAQClGJLD6i0aeN3LN0Tqekq0mIuY
NCED4I8MZhydOMM/JdwAUdU0x7rzIDMQ0okZS//UKcmM8ROCCKMHJaoraNFjeaK8
Zqr2nWWSlv8WAGMRaRYFopJEHtX0QO18+eHpp378R/X7SZbGfQlsA/Mtj2KP5fGH
vjIrxHojAY+bmHuBw+xekp0Lga2vkLaTZYiskIppMBbA56IU8Vsdp7jvdLXF3nrM
vcjJRNjEZAauMonPFw7m4vNJTdMFBU7tZ6cu0SZyqj4tOGU5cIVl4I2IODi1PQcc
6VldXZEn8URIuPWo4NDvingG9LAjH+/qQ/H8VS8pTEqpXRBAn4o/hCqXgEki
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyGpK2iNMhuiVYiadIAG0
evdtocBuHcFGP8w0vT8J2F8Xchlt6G+BUZPVi0BjbmgtoSVTCkwvXOdhAbIpitSi
jakbLVC2Xsb12T0U2nxOnN1WvJ0DYpYkkDs6i6Nstd7Md1XMiigT0hecnMtUl42m
JG6FRSSnTgoATd8cHhPj/wiB9xevaNerAma3c2OTXY7TyIP2BTUMpjXaWvAkOMHV
dJMm8YlETXXXSj1lFpVXWiujHVxnWQt1RtoXjaIvjxTK48t9Egexmkz43PH/oq9f
9Sv4i6qVmbkFxvuPhm10jyYa2794LREkwwW+R5dF2gmhM58umlYDh1H4D203s38C
SwIDAQAB
-----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 301154038647365333726259038327475354524697
 . . . . . . . . [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 2023-10-25 12:26:07 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-23 12:26:06 +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 'o4s.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 25300075724747481517877422536539238820182260486527881782657195845686329502951013453686535374282479102496694680424491974624936770499539211788841553427734521283150444452035426531873068934459639194808212311811869617106643863707729246519542387486745755496471320840737570967778258429418930107604990475926499040088647705357456602174110942168781758994419140534270708194734690121521046183251199590846438438217592600101720206196518720575381811912472185060497774689936267790421870648829168942610100927743158940192309216404844956010257219117590930172697474927845538090437975148284548804953995858896163856963126553185228444074571
 . . . . . . . . . . . . . . . . . . . . [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)
							a9e61bb719c3549c2fef212748b5f3e6b93cb681
 . . . . . . . . . . . . . . . . [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 (10 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'o4s.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018b67038c42000004030047304502206a042fd232105d9b4189342169b96e3d7ebc3bc85c97d9489c929c4945dfb68d022100a34a8b72ab9818f6199a6a84d5deb318c0b454385319446c71a74e20a133b06800760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018b67038c7e000004030047304502210094fc07ccad559cae6f031043b4fdbcb11a8051df499359d7db848e2cdbdc3cdb02205f50e9ed40f0e760bb00d4a0929692f6d61efb22e10c55dc449194bdd8174045
 . . . . [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)
		00a51892c3ea2d1a78ddcb3744ea7a4ab4988b98342103e08f0c661c9d38c33f25dc0051d534c7baf3203310d289194bffd429c98cf1138208a30725aa2b68d16379a2bc66aaf69d659296ff16006311691605a292441ed5f440ed7cf9e1e9a77efc47f5fb4996c67d096c03f32d8f628fe5f187be322bc47a23018f9b987b81c3ec5e929d0b81adaf90b6936588ac908a693016c0e7a214f15b1da7b8ef74b5c5de7accbdc8c944d8c46406ae3289cf170ee6e2f3494dd305054eed67a72ed12672aa3e2d386539708565e08d883838b53d071ce9595d5d9127f14448b8f5a8e0d0ef8a7806f4b0231fefea43f1fc552f294c4aa95d10409f8a3f842a97804922