www.tefer.io

Issued by R3

About this certificate

This digital certificate with serial number 04:c7:9d:89:c5:f5:1c:99:15:98:d4:ea:ae:d9:eb:ad:16:b9 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=www.tefer.io

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:c7:9d:89:c5:f5:1c:99:15:98:d4:ea:ae:d9:eb:ad:16:b9
Serial Number (int): 416374738899370034262426329710526412428985
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: be:be:f3:41:9b:16:2b:ba:0c:1c:3e:69:33:45:86:f4:5d:44:f5:c9
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): ff:03:53:25:67:8d:0c:62:dd:4e:0d:fa:6f:5c:96:85:80:45:e0:28
Fingerprint (sha256): ca:6b:56:79:a5:46:89:64:ce:33:51:3b:9b:df:ab:23:82:08:9d:65:7b:52:6e:c3:05:87:9f:2b:47:26:08:f1

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

Revocation information

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

Check the revocation status for certificate www.tefer.io

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.tefer.io

Public Key Algorithm

RSA

Key Size

4096

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

tefer.io
www.tefer.io

Other certificates including the domain name tefer.io

(limited to 100 certificates)
go.marune.social
tefer.io
www.asantk.com
www.tefer.io
www.tefer.io
o.shuge.org
www.bhavinpanara.com
www.tefer.io
www.tefer.io
www.tefer.io
www.asantk.com
www.tefer.io

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIF7jCCBNagAwIBAgISBMedicX1HJkVmNTqrtnrrRa5MA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yNDA0MDUyMzE0MjBaFw0yNDA3MDQyMzE0MTlaMBcxFTATBgNVBAMT
DHd3dy50ZWZlci5pbzCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBALqJ
F8iM8y1xMmNNOqBn29ghpW2mrgA3YtFuisc8mqK4JDGg7UP8VYTiLMSpNG8uu3Jj
sW7+3W2GH95z+oAM+AqukJqIeT6zOR9F/BpnpFkXHxtzWJgfOcL3mwher9W3Xr6L
G3m4AXZMO+IBxiPyWBFDnyt0eN9mFcucqr/RpofIapkl4+Tm6L1v3zvl7gNOa3og
fWUHk6txjREtkVup6/CwdY7Q78qzylB712mXBbLlyvYImQPHvpioDq8BhirhcF9P
LL4wTaueMEDmgaOhFPhgjscCcnhKtOmP7rU8tc2wuBvnF4ePJf+x3EYbEYIzTwJY
lpMLDWRuh+agrTr0b8RiBxk7t/nJeSze/XR8tkIiM9O0RfSixrMkTq86RvzYC40S
Jn16RPt4KPxYp5zWGZJrrUWKuGBOzAKbYuykxfEDeFZ0OGRAfYCPoiM9Pi13NBG4
WOXSIfMRULNP2pItHnRfObOILZ8PeYpykEHoIXszJayld7BSP7/XnzM14jdaNDpN
cjD7M3GCcQuAUIiBFoudxp2/r5IYfrz1T/BQZNkvr4fAgD6irstZpA2SIhfQ30/X
9C8syvp5UvFxss8OWZUPKfVaz2W5tqzX+ncjBemnTTXi8032FSTIj9mL0CpJq48F
3nSakoYNSudngB4kdjXaysDy9bnx7hHe0Wh4uAFHAgMBAAGjggIXMIICEzAOBgNV
HQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1Ud
EwEB/wQCMAAwHQYDVR0OBBYEFL6+80GbFiu6DBw+aTNFhvRdRPXJMB8GA1UdIwQY
MBaAFBQusxe3WFbLrlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEF
BQcwAYYVaHR0cDovL3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8v
cjMuaS5sZW5jci5vcmcvMCEGA1UdEQQaMBiCCHRlZmVyLmlvggx3d3cudGVmZXIu
aW8wEwYDVR0gBAwwCjAIBgZngQwBAgEwggEDBgorBgEEAdZ5AgQCBIH0BIHxAO8A
dQBIsONr2qZHNA/lagL6nTDrHFIBy1bdLIHZu7+rOdiEcwAAAY6wwZYiAAAEAwBG
MEQCIEFoxOagotE97nZHk/H+A/LY1fNwIbH4rt5YbxC0IgfXAiBJUeyInDUq5Eif
CE4oiyH70hszpqVHkUJjZXCTOFLKHQB2AO7N0GTV2xrOxVy3nbTNE6Iyh0Z8vOze
w1FIWUZxH7WbAAABjrDBlioAAAQDAEcwRQIhAKtHGPYh1cb7kKiUdN6fJ6leUhqL
lJ8YMiW4uOomFcL8AiAnKvsFKQedxIDzOqai2UQmw3bSbmkefvF42fFWjzToEzAN
BgkqhkiG9w0BAQsFAAOCAQEAKukb1srnxcIFt6DsPMWU8NDXHusgOggEsFxWfbs0
Tao5HtFfr8S+X/MLuzCkSsPBImorBXB43wvhLO9EGYSxmeuatOvwE881yMsF/w7i
l65FDnCrUDV9leADWXRIXgIOX55XmQYy4RTv7kfuvsV8BKOaThbG7jgkLZLB9tJO
igKlbOl44hFIHqjErEBSrTqFOcjsbz/3CF+bq5d+74k2NlHknP/52orS2EGZ3+Qt
WTJ7vSYqGNb6NdT49ykezpkIWy4xWLBEGa0khO4bb/dVFb8uax+86gcdusoKgwMr
Fg3lO7pFsHeaRQaliz8VALIRJWONf6XXcyO00mE/IRx6mA==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 416374738899370034262426329710526412428985
 . . . . . . . . [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 2024-04-05 23:14:20 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-04 23:14:19 +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 'www.tefer.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 760998524199401194048501549067097449481111119540918663848685459870585280221436193636474601165323431422700543869501523756071766125982908148817366011009291244128849601208405021954035641314495555578983082015555632126991250380042880872631576650172913492248323155092279946946893641192006231091719179071119632781911927389818171134489607719884646524223055229979888959093593910653520597370359619351600812885011292645152323996126232330804982345922583686961473568565069174541660534425511102263338313451819866344831727637599074559432067895311836304340996724888877101409594816988352844062515963353462203386002696256156739547636902553591128004722360395927171579845193278565219378304193133450102629938380668763037477964567648600681790826838955352699159258029461251838913904627157971176182586181347567606578480719050961372268730783369772633254880593310356330454260349028652810058463064098990053009910862406433135742493653456142678473057566060695546520085093239203229442721455200318752774084787715505341087180225752120818811494913510717025111044987119525160881005414523796061769138806548085692688270770656410552645037432615580626654176618941926381897139877672098535334912199155613357712882985957799707671097602137422335322713630083776639146479059271
 . . . . . . . . . . . . . . . . . . . . [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)
							bebef3419b162bba0c1c3e69334586f45d44f5c9
 . . . . . . . . . . . . . . . . [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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tefer.io'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.tefer.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018eb0c19622000004030046304402204168c4e6a0a2d13dee764793f1fe03f2d8d5f37021b1f8aede586f10b42207d702204951ec889c352ae4489f084e288b21fbd21b33a6a5479142636570933852ca1d007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018eb0c1962a0000040300473045022100ab4718f621d5c6fb90a89474de9f27a95e521a8b949f183225b8b8ea2615c2fc0220272afb0529079dc480f33aa6a2d94426c376d26e691e7ef178d9f1568f34e813
 . . . . [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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