os.city

Issued by R3

About this certificate

This digital certificate with serial number 04:41:87:4b:1f:b0:aa:02:d5:39:b3:b5:b6:50:1b:0b:ef:5f 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=os.city

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:41:87:4b:1f:b0:aa:02:d5:39:b3:b5:b6:50:1b:0b:ef:5f
Serial Number (int): 370747333421348810658691150403522823712607
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: a8:3f:9c:77:e8:c5:b7:08:40:ab:d6:58:7d:e9:cb:fe:5f:91:af:ef
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 1c:a9:30:c7:95:39:d5:4a:be:6c:da:2b:35:8b:64:97:1a:ba:1e:4e
Fingerprint (sha256): 08:14:0e:d4:8d:08:50:18:ad:52:ea:44:65:ff:9c:4a:b3:c5:7c:40:7f:77:66:72:04:eb:a1:d5:20:74:cd:24

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

Revocation information

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

Check the revocation status for certificate os.city

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for os.city

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

os.city
www.os.city

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Certificate

The complete raw certificate details for os.city in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIE6DCCA9CgAwIBAgISBEGHSx+wqgLVObO1tlAbC+9fMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yMzExMjcyMDQyMzZaFw0yNDAyMjUyMDQyMzVaMBIxEDAOBgNVBAMT
B29zLmNpdHkwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCBy8anokfM
vKHJrYl83HXXF78SF7Vn9M82wQ5hI5Xhk4Cp8BwCEJOdV0F13Sq9Np2I3hpGDMDR
wPCVxC/a2jLU5AsFosJIKPT44BLLdT8uKDE9lXEKgQWKORBxT/a5SrU3D441fjtT
zVcLv1JBaKWM9yW98fJ3wP4wCmCv7LCKPwlHIgwDa1Onkr+jzChqhMWbP1xZPCxc
z6IjqVwZV6+2j7EhyNfBsEGUyA8kD1ohq/4b0UAOLYmwc9+AYudJbm+L6h0g+i0t
fkS015iBdBdd4wbKZkFa8zhVhATo0ehXJFtjtcmnz++zHp0+j7ARgLciAR8d9fS6
kjlVmAzBVVhXAgMBAAGjggIWMIICEjAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYw
FAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFKg/
nHfoxbcIQKvWWH3py/5fka/vMB8GA1UdIwQYMBaAFBQusxe3WFbLrlAJQOYfr52L
FMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcwAYYVaHR0cDovL3IzLm8ubGVu
Y3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMuaS5sZW5jci5vcmcvMB8GA1Ud
EQQYMBaCB29zLmNpdHmCC3d3dy5vcy5jaXR5MBMGA1UdIAQMMAowCAYGZ4EMAQIB
MIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYAO1N3dT4tuYBOizBbBv5AO2fYT8P0
x70ADS1yb+H61BcAAAGMErvypgAABAMARzBFAiBtF/WzgtxknagObPrveqJVNSKv
itrQrT5w3KHmWNp/6wIhAOY4e2/1weKJC4xSdU0iI/pCxPonB4fyWSbgoQDXuzuR
AHYAdv+IPwq2+5VRwmHM9Ye6NLSkzbsp3GhCCp/mZ0xaOnQAAAGMErvy9wAABAMA
RzBFAiAkXWdEKkLmb9UlddjX0Imuv/ZvZUIsDnvV3PKV5o9lyQIhAIxMYMbgXGEQ
dX3bguHVCviseAnm9MLHhdoDSF61mWMCMA0GCSqGSIb3DQEBCwUAA4IBAQBwUQPF
NAGyVFx3YfJe60sfpSkfqBxtl5m32ja66tgOy9G4pMvOg7NALI1KmiU65oBxbaSw
58Paw5p4zAJZFlR03Qg5sOSqPNXe8+yh2SNsE2+mNsnIl72fpe8qDs1gyjROMPxT
EAfcoHwcD87DRZxYpcQWCIRvcFqjGVgXsytLQ5MeLO5ZI/F11Ci8uiu9esJLP1Lq
pGfEOU+4/3BwM9b4S5fIWuayKYqBgHgZh4Jnr93OcjdYFK9hoRanm/WQL1eRQTQU
CR3wef/flQOoUoBxYDolmtdBE5jKkXVGO5hu5mPacevee7fUXYqsUQKS2uRnRIBc
ebOJ14eP9xxEBJKe
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAgcvGp6JHzLyhya2JfNx1
1xe/Ehe1Z/TPNsEOYSOV4ZOAqfAcAhCTnVdBdd0qvTadiN4aRgzA0cDwlcQv2toy
1OQLBaLCSCj0+OASy3U/LigxPZVxCoEFijkQcU/2uUq1Nw+ONX47U81XC79SQWil
jPclvfHyd8D+MApgr+ywij8JRyIMA2tTp5K/o8woaoTFmz9cWTwsXM+iI6lcGVev
to+xIcjXwbBBlMgPJA9aIav+G9FADi2JsHPfgGLnSW5vi+odIPotLX5EtNeYgXQX
XeMGymZBWvM4VYQE6NHoVyRbY7XJp8/vsx6dPo+wEYC3IgEfHfX0upI5VZgMwVVY
VwIDAQAB
-----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 370747333421348810658691150403522823712607
 . . . . . . . . [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 2023-11-27 20:42:36 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-25 20:42:35 +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 'os.city'
 . . . . . . . . [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 16385227029101487697681894017478871010259465854629503870055640654561699687705298069031399989084064158632177223379191874307316383257256770587534467720969577555780698636510143690350530372447279389341069638909978158810559384649152162219998422115786492146666367639766022026082912347717068837235973464822896345189301928537516259812172855038551802619617861251087618580322435170300115869918047085278845747339983845002713530970217559196353137145067881645379638996640437350780250510615200102435024587081404088397339736535761337018702458057795560731314610961780240882034837962961062501022731063025845620185903459013984582457431
 . . . . . . . . . . . . . . . . . . . . [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)
							a83f9c77e8c5b70840abd6587de9cbfe5f91afef
 . . . . . . . . . . . . . . . . [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 (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'os.city'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.os.city'
 . . . . . . . . . . . . . . . . [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)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018c12bbf2a6000004030047304502206d17f5b382dc649da80e6cfaef7aa2553522af8adad0ad3e70dca1e658da7feb022100e6387b6ff5c1e2890b8c52754d2223fa42c4fa270787f25926e0a100d7bb3b9100760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018c12bbf2f700000403004730450220245d67442a42e66fd52575d8d7d089aebff66f65422c0e7bd5dcf295e68f65c90221008c4c60c6e05c6110757ddb82e1d50af8ac7809e6f4c2c785da03485eb5996302
 . . . . [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)
		00705103c53401b2545c7761f25eeb4b1fa5291fa81c6d9799b7da36baead80ecbd1b8a4cbce83b3402c8d4a9a253ae680716da4b0e7c3dac39a78cc0259165474dd0839b0e4aa3cd5def3eca1d9236c136fa636c9c897bd9fa5ef2a0ecd60ca344e30fc531007dca07c1c0fcec3459c58a5c41608846f705aa3195817b32b4b43931e2cee5923f175d428bcba2bbd7ac24b3f52eaa467c4394fb8ff707033d6f84b97c85ae6b2298a81807819878267afddce72375814af61a116a79bf5902f5791413414091df079ffdf9503a8528071603a259ad7411398ca9175463b986ee663da71ebde7bb7d45d8aac510292dae46744805c79b389d7878ff71c4404929e