Namecheap.com

SSL Checker

Submit the Hostname and Port in the fields below. This checker supports SNI and STARTTLS.

Report

Hostname: Matches Common Name or/and SAN
Expired: No (89 days till expiration)
Public Key: We were unable to find any issues in the public key of end-entity certificate
Trusted: Yes, we were able to verify the certificate
Self-Signed: No, the end-entity certificate is not self-signed
Chain Issues: No, we were unable to detect any issues in the certificate chain sent by the server
Weak signatures: No, certificates sent by the server were not signed utilizing a weak hash function
OCSP Status: OCSP Responder returned "good" status for the end-entity certificate

DNS Information

Resolves To: 172.67.72.147
Reverse IP lookup: No records found
Nameserver: josh.ns.cloudflare.com.
Nameserver: zita.ns.cloudflare.com.

General Information

Common Name: doi.org
SANs: DNS:*.doi.orgDNS:doi.org Total number of SANs: 2
Signature Algorithm: ecdsa-with-SHA384
Key Type: ECDSA (secp256r1)
Key size: 256 bits
Serial Number: 4a705736b543657f511bc18ff2d450b222e
Not Before: Mar 28, 2024 01:14:34 GMT
Not After: Jun 26, 2024 01:14:33 GMT
Number of certs: 4
Revocation Status: good
OCSP Stapling: Supported
Server: cloudflare
HSTS: max-age=31536000; includeSubDomains; preload
HPKP: Not Supported

Chain Information

Certificate # 1 - Common Name: doi.org

Decode this certificate for verbose information →
Subject Common Name doi.org
Issuer Common Name E1
Issuer Organization Let's Encrypt
Not Before: Mar 28, 2024 01:14:34 GMT
Not After: Jun 26, 2024 01:14:33 GMT
Signature Algorithm: ecdsa-with-SHA384
Serial Number: 4a705736b543657f511bc18ff2d450b222e
SHA1 Fingerprint: 7E:E6:4F:85:52:F3:10:D1:56:B7:64:2B:61:1B:C5:CE:31:CC:49:FA
MD5 Fingerprint: 35:03:6C:E6:76:DA:2E:82:6B:74:03:09:5B:97:41:2C

Certificate # 2 - Common Name: E1

Decode this certificate for verbose information →
In place? Yes, this certificate directly certifies the preceding one
Subject Common Name E1
Subject Organization Let's Encrypt
Issuer Common Name ISRG Root X2
Issuer Organization Internet Security Research Group
Not Before: Sep 04, 2020 00:00:00 GMT
Not After: Sep 15, 2025 16:00:00 GMT
Signature Algorithm: ecdsa-with-SHA384
Serial Number: b3bddff8a7845bbce903a04135b34a45
SHA1 Fingerprint: 09:1E:8E:A1:B2:56:A3:12:96:2A:F6:C1:40:C0:FB:F0:79:A4:07:B3
MD5 Fingerprint: 90:D3:66:64:04:88:FC:F8:76:BD:BD:3A:19:C5:FB:F1

Certificate # 3 - Common Name: ISRG Root X2

Decode this certificate for verbose information →
In place? Yes, this certificate directly certifies the preceding one
Subject Common Name ISRG Root X2
Subject Organization Internet Security Research Group
Issuer Common Name ISRG Root X1
Issuer Organization Internet Security Research Group
Not Before: Sep 04, 2020 00:00:00 GMT
Not After: Sep 15, 2025 16:00:00 GMT
Signature Algorithm: sha256WithRSAEncryption
Serial Number: 79e492886376fd40848c23fc631e463
SHA1 Fingerprint: 15:16:82:F5:21:8C:0A:51:1C:28:F4:06:0A:73:B9:CA:78:CE:9A:53
MD5 Fingerprint: 29:F1:C1:B2:6D:92:E8:93:B6:E6:85:2A:B7:08:CC:E1

Certificate # 4 - Common Name: ISRG Root X1

Decode this certificate for verbose information →
In place? Yes, this certificate directly certifies the preceding one
Subject Common Name ISRG Root X1
Subject Organization Internet Security Research Group
Issuer Common Name DST Root CA X3
Issuer Organization Digital Signature Trust Co.
Not Before: Jan 20, 2021 19:14:03 GMT
Not After: Sep 30, 2024 18:14:03 GMT
Signature Algorithm: sha256WithRSAEncryption
Serial Number: 4001772137d4e942b8ee76aa3c640ab7
SHA1 Fingerprint: 93:3C:6D:DE:E9:5C:9C:41:A4:0F:9F:50:49:3D:82:BE:03:AD:87:BF
MD5 Fingerprint: C1:E1:FF:07:F9:F6:88:49:82:74:D1:A1:80:53:EA:BF

OpenSSL Handshake

depth=3 C = US, O = Internet Security Research Group, CN = ISRG Root X1
verify return:1
depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X2
verify return:1
depth=1 C = US, O = Let's Encrypt, CN = E1
verify return:1
depth=0 CN = doi.org
verify return:1
CONNECTED(00000003)
OCSP response: 
======================================
OCSP Response Data:
    OCSP Response Status: successful (0x0)
    Response Type: Basic OCSP Response
    Version: 1 (0x0)
    Responder Id: C = US, O = Let's Encrypt, CN = E1
    Produced At: Mar 28 02:14:00 2024 GMT
    Responses:
    Certificate ID:
      Hash Algorithm: sha1
      Issuer Name Hash: EF900170DD588F2A651E21511FDCD0BB6F512BAB
      Issuer Key Hash: 5AF3ED2BFC36C23779B95230EA546FCF55CB2EAC
      Serial Number: 04A705736B543657F511BC18FF2D450B222E
    Cert Status: good
    This Update: Mar 28 02:14:00 2024 GMT
    Next Update: Apr  4 02:13:58 2024 GMT

    Signature Algorithm: ecdsa-with-SHA384
         30:65:02:30:67:74:e5:61:26:90:9a:9b:69:6d:b2:f2:f4:bf:
         0c:86:7b:1e:ca:b6:a7:bf:05:24:7e:1f:3c:5c:5c:1e:2a:41:
         77:bf:24:7e:cc:58:a7:b5:a8:ca:db:46:e5:3e:cd:25:02:31:
         00:f7:47:66:e9:64:dd:91:36:15:10:fb:4e:49:c3:f0:54:78:
         64:4c:dc:63:f8:5c:2d:87:25:b2:44:da:d6:69:fc:4d:5f:17:
         ef:01:00:de:b8:3b:40:eb:3f:4a:ab:cf:f4
======================================
---
Certificate chain
 0 s:CN = doi.org
   i:C = US, O = Let's Encrypt, CN = E1
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
 1 s:C = US, O = Let's Encrypt, CN = E1
   i:C = US, O = Internet Security Research Group, CN = ISRG Root X2
-----BEGIN CERTIFICATE-----
MIICxjCCAk2gAwIBAgIRALO93/inhFu86QOgQTWzSkUwCgYIKoZIzj0EAwMwTzEL
MAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2VhcmNo
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BCYwJDAiBggrBgEFBQcwAoYWaHR0cDovL3gyLmkubGVuY3Iub3JnLzAnBgNVHR8E
IDAeMBygGqAYhhZodHRwOi8veDIuYy5sZW5jci5vcmcvMCIGA1UdIAQbMBkwCAYG
Z4EMAQIBMA0GCysGAQQBgt8TAQEBMAoGCCqGSM49BAMDA2cAMGQCMHt01VITjWH+
Dbo/AwCd89eYhNlXLr3pD5xcSAQh8suzYHKOl9YST8pE9kLJ03uGqQIwWrGxtO3q
YJkgsTgDyj2gJrjubi1K9sZmHzOa25JK1fUpE8ZwYii6I4zPPS/Lgul/
-----END CERTIFICATE-----
 2 s:C = US, O = Internet Security Research Group, CN = ISRG Root X2
   i:C = US, O = Internet Security Research Group, CN = ISRG Root X1
-----BEGIN CERTIFICATE-----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4pgmmIv97igyIintTJUJxCD6B+GGLET2gUfA5GIy7R3YPEiIlsNekbave1mk7uOG
nMeIWMooKmZVm4WAuR3YQCvJHBM8qevemcIWQPb1pK4qJWxSuscETLQyu/w4XKAM
YXtX7HdOUM+vBqIPN4zhDtLTLxq9nHE+zOH40aijvQT2GcD5hq/1DhqqlWvvykdx
S2McTZbbVSMKnQ+BdaDmQPVkRgNuzvpqfQbspDQGdNpT2Lm4xiN9qfgqLaSCpi4t
EcrmzTFYeYXmchynn9NM0GbQp7s=
-----END CERTIFICATE-----
 3 s:C = US, O = Internet Security Research Group, CN = ISRG Root X1
   i:O = Digital Signature Trust Co., CN = DST Root CA X3
-----BEGIN CERTIFICATE-----
MIIFYDCCBEigAwIBAgIQQAF3ITfU6UK47naqPGQKtzANBgkqhkiG9w0BAQsFADA/
MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
DkRTVCBSb290IENBIFgzMB4XDTIxMDEyMDE5MTQwM1oXDTI0MDkzMDE4MTQwM1ow
TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwggIiMA0GCSqGSIb3DQEB
AQUAA4ICDwAwggIKAoICAQCt6CRz9BQ385ueK1coHIe+3LffOJCMbjzmV6B493XC
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ATAwMC4GCCsGAQUFBwIBFiJodHRwOi8vY3BzLnJvb3QteDEubGV0c2VuY3J5cHQu
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MA0GCSqGSIb3DQEBCwUAA4IBAQAKcwBslm7/DlLQrt2M51oGrS+o44+/yQoDFVDC
5WxCu2+b9LRPwkSICHXM6webFGJueN7sJ7o5XPWioW5WlHAQU7G75K/QosMrAdSW
9MUgNTP52GE24HGNtLi1qoJFlcDyqSMo59ahy2cI2qBDLKobkx/J3vWraV0T9VuG
WCLKTVXkcGdtwlfFRjlBz4pYg1htmf5X6DYO8A4jqv2Il9DjXA6USbW1FzXSLr9O
he8Y4IWS6wY7bCkjCWDcRQJMEhg76fsO3txE+FiYruq9RUWhiF1myv4Q6W+CyBFC
Dfvp7OOGAN6dEOM4+qR9sdjoSYKEBpsr6GtPAQw4dy753ec5
-----END CERTIFICATE-----
---
Server certificate
subject=CN = doi.org

issuer=C = US, O = Let's Encrypt, CN = E1

---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: ECDSA
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 4791 bytes and written 398 bytes
Verification: OK
---
New, TLSv1.3, Cipher is TLS_AES_256_GCM_SHA384
Server public key is 256 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)
---
DONE