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.spanning.no · 194.62.163.21:443

Verified

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

Subject
CN=mail.spanning.no
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-09-20T15:39:39+00:00
Expires
2026-12-19T15:39:38+00:00
Days remaining
61
Serial (hex)
0566A4CD0D6EC430AEDBDA18C4EF3F6D559D
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.spanning.no, DNS:autoconfig.spanningnetworks.no, DNS:autodiscover.spanning.no, DNS:autodiscover.spanningnetworks.no, DNS:mail.spanning.no

SHA-256 fingerprint

C6:DE:05:9C:36:89:6B:C8:14:83:85:4D:22:D6:2D:09:2A:A1:E4:67:F0:1B:85:AF:91:04:E6:85:97:73:CA:C7
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
90:54:00:89:A0:10:40:1E:F7:E1:2A:10:71:52:10:2C:53:DB:B7:17
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:autoconfig.spanning.no, DNS:autoconfig.spanningnetworks.no, DNS:autodiscover.spanning.no, DNS:autodiscover.spanningnetworks.no, DNS:mail.spanning.no
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/30.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Sep 20 16:38:09.201 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:FF:68:98:39:46:F5:76:DB:0C:CD:66: 48:09:11:14:C8:F9:6E:A7:05:53:04:25:F2:D3:38:51: 58:9C:90:64:D9:02:20:6C:42:9B:CD:FE:20:FA:3C:A8: 99:29:74:51:4F:F6:F4:4E:9B:DE:9D:E8:94:87:47:41: 54:A8:B1:18:23:77:0F Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 26:E3:64:6E:58:69:21:23:BC:34:3F:47:24:35:9B:37: 92:CD:24:5A:88:D8:15:D3:93:33:FD:99:18:AB:47:23 Timestamp : Sep 20 16:38:06.816 2026 GMT Extensions: 00:00:05:00:44:61:64:8A Signature : ecdsa-with-SHA256 30:46:02:21:00:99:25:8A:EE:FE:DE:D8:E5:DA:75:7D: E0:1E:C5:AB:AD:D8:87:33:3E:CB:FB:F9:23:F1:DC:B4: C9:06:E4:58:4E:02:21:00:AD:D7:FD:A8:A2:E7:A5:AE: FC:B7:A3:6A:79:CD:65:42:D2:C6:AE:D2:76:5E:07:B0: 0F:86:74:43:30:CD:04:72
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-19T15:12:31+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
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
684
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
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
2145
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-----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-----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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