DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

mail.serverspan.com · 174.136.200.10:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=nest.familiacojan.ro
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-26T09:01:08+00:00
Expires
2027-01-24T09:01:07+00:00
Days remaining
82
Serial (hex)
05A4BECF863450D37C126268B7D1D6D1AB14
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.serverspan.com, DNS:autodiscover.cojan.ro, DNS:autodiscover.serverspan.com, DNS:mail.serverspan.com, DNS:mx.cojan.ro, DNS:nest.familiacojan.ro

SHA-256 fingerprint

5F:71:E4:86:28:11:B6:95:F9:B4:60:C8:9D:30:16:F9:EE:CE:2E:B9:27:BD:9C:5F:85:15:38:C4:DB:DA:7A:2D
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
F1:B3:7E:B0:CB:4B:E6:5B:39:25:2F:BC:62:C1:AC:65:F6:48:0E:FE
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:autoconfig.serverspan.com, DNS:autodiscover.cojan.ro, DNS:autodiscover.serverspan.com, DNS:mail.serverspan.com, DNS:mx.cojan.ro, DNS:nest.familiacojan.ro
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/21.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 00:1A:5D:1A:1C:2D:93:75:B6:48:55:78:F8:2F:71:A1: AE:6E:EF:39:7D:29:7C:8A:E3:15:7B:CA:DE:E1:A0:1E Timestamp : Oct 26 09:59:38.552 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:33:85:37:94:BD:A3:39:04:49:5E:B3:FD: DB:7C:13:6D:93:56:54:62:97:1D:80:90:A9:A8:9D:03: 48:AD:86:49:02:21:00:B4:74:49:6C:20:11:86:40:60: A6:15:98:87:9B:B5:31:EE:5C:C3:5C:50:DB:C1:0F:5F: 5F:E8:BD:23:52:AD:AD Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Oct 26 09:59:38.972 2026 GMT Extensions: 00:00:05:00:2E:C1:CD:89 Signature : ecdsa-with-SHA256 30:46:02:21:00:FB:35:AA:66:A4:01:EF:56:EF:14:96: D6:A4:59:99:5D:B8:94:A5:C7:97:8D:D0:D3:65:F5:F7: D0:A7:E3:AF:96:02:21:00:83:CD:E1:3C:8A:10:DE:B5: 67:8F:94:20:90:B0:A1:3B:3B:40:10:AC:83:0F:0A:BD: 99:15:96:8D:8B:1B:7E:89
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-02T16:30:29+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
670
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2131
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/ 
-----BEGIN CERTIFICATE-----
MIIF9DCCA9ygAwIBAgIRAPJLbRf52a18scn+p4eCaZ8wDQYJKoZIhvcNAQELBQAw
TzELMAkGA1UEBhMCVVMxKTAnBgNVBAoTIEludGVybmV0IFNlY3VyaXR5IFJlc2Vh
cmNoIEdyb3VwMRUwEwYDVQQDEwxJU1JHIFJvb3QgWDEwHhcNMjYwNTEzMDAwMDAw
WhcNMzIwOTAyMjM1OTU5WjAuMQswCQYDVQQGEwJVUzENMAsGA1UEChMESVNSRzEQ
MA4GA1UEAxMHUm9vdCBZUjCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIB
ANvGJnN78CTJdWL3+eGfsLN5TrNBJs+VH9hRXqRbwxu9sGNiB0BD1fcOxbSUQCJI
M1xE13Db+5Cw1w0s0EBYsvuIP/6joF0w8cuImbgR1OGgYbSQ4OpzI+DG8SGuTlcE
873OCS+kh3srlo6vl43M5OJg4Aeo1sfHp6kTJDoIiFBNJAY+OKfX/FUvYKuhjT+n
o49lmqmupSBI5PkBQiqrEGtWU5uxU/cQWHGu8jSjFBznZqvbNPLMXMLFxCb3WTfr
JBXXjqvWG+v4bjzxjjeAtOlU7qarRDvNOyAuQYLln904M+faKx8hnLCpJ15ZqaEg
cNlY+9MMWcC5yvL2A2j3l9+2buggZX+dOE91zYmIdawTvSZuVvlbRrAlLxIB6pwM
BjneXCjYQ8+3BCCjssbSNpZU3hTcBDdhfAlEDlYr6pEatnMdmDT5BqnKC92bd0Eh
M1fbLHioLccLCuievT8ZkPhZrq7Mii7gNXAcUEAR8+lzYal+9zTg7C5DALyVOeG/
CqfRAMn1KSHCR0NSA6P8tn/mGRlnCct5rtVCLnVySVpU6H1qGg3DgTOuskf8eahT
MiYbI5ezPJmO5ertalskQ1utp74+eDy92PI4ftHKTbq9IWhH4YZKh3WnJEIt+oQv
lYZbY8tpEroKrFB6PFGzrJIDRyts4HqvuH52RFj2zv/BAgMBAAGjgeswgegwDgYD
VR0PAQH/BAQDAgEGMBMGA1UdJQQMMAoGCCsGAQUFBwMBMA8GA1UdEwEB/wQFMAMB
Af8wHQYDVR0OBBYEFN7nW2DQIm1AKH0/DQH+pLVStFGUMB8GA1UdIwQYMBaAFHm0
WeZ7tuXkAXOACIjIGlj26ZtuMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcwAoYW
aHR0cDovL3gxLmkubGVuY3Iub3JnLzATBgNVHSAEDDAKMAgGBmeBDAECATAnBgNV
HR8EIDAeMBygGqAYhhZodHRwOi8veDEuYy5sZW5jci5vcmcvMA0GCSqGSIb3DQEB
CwUAA4ICAQA8spSI95KKfn2W6GMmDpHBJSPaLbsS3W93cijJCRCYAc1fsJgL1FIL
7C0C9ecPOdcwB2fi0Dk2p94j9iTJCxmt5CFSKLRWwnXT2MMSXexVxqoVB79BdWPx
VXETkVme/qYSAuKVHh5Ps+5BixgmwS1JkjSAc+MfrUbNssVEEnH0aEiAh+rotXAV
JSP/Ye7LJPEwD9DWG72vVWbhAcuOf5OLjz57Ctk7MgQHynZ7+PlHJtajroCaIbtC
r6tcZZaAwUQm+jQyeWdV+2hv9deOYFmKeQyjjcSrN5Nadrw+L9DZJLbA1HqeNvLh
BgqpP0fvJq2N6EtD574N6eMI7uMsJTnji2UDz9el5XLSv9fqJMuDQtYVb2oTNoKp
oUqhxPVC0aq4eG5MESaIdn8b5ZGSSeAJLMHXljEdlNza+ncfkviXk1POLnnFdvx8
/gk6M374WbLWFXw8N141B/Rl/tINGfl1TxOIiqtiMYkL02RSGb1kq34BL9NPP27z
RGMuHGnzS3hFIrRTfKxrzUZ9RzQWzEG3K6fJ3r2nqSltkeytis9DIBoFY9VmVyjL
M71DMi+y1+TRSJVClEMwvA4yL++7q9XZx5r5wBRWB4kQTKH5qyoZnDw7iiuh1lID
yDFx8r7i9vIJU5HS3moZLkYWAOilMaV9N56A9Bgb6dNcHkvg3NoaYA==
-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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