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.ns.de · 188.40.205.186:443

Verified

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

Subject
CN=mail.ns.de
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-09-15T11:39:58+00:00
Expires
2026-12-14T11:39:57+00:00
Days remaining
82
Serial (hex)
0555B09FA49BB348CE78204DD4D09A551640
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.1px.de, DNS:autoconfig.kontaktformular.de, DNS:autoconfig.ludwigmedia.com, DNS:autoconfig.makershop.de, DNS:autoconfig.ns.de, DNS:autoconfig.pfoerringer.com, DNS:autoconfig.pizzapirates.cy, DNS:autoconfig.signmaker.cy, DNS:autoconfig.stretchtent.cy, DNS:autoconfig.villateam.cy, DNS:autodiscover.1px.de, DNS:autodiscover.kontaktformular.de, DNS:autodiscover.ludwigmedia.com, DNS:autodiscover.makershop.de, DNS:autodiscover.ns.de, DNS:autodiscover.pfoerringer.com, DNS:autodiscover.pizzapirates.cy, DNS:autodiscover.signmaker.cy, DNS:autodiscover.stretchtent.cy, DNS:autodiscover.villateam.cy, DNS:mail.ns.de

SHA-256 fingerprint

67:38:60:BF:54:03:EA:45:32:8A:0B:BC:8D:61:89:34:C6:4A:EB:88:DB:2B:24:27:69:9D:96:32:BC:1C:26:49
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
7E:A9:82:80:9F:FE:F8:95:DB:E4:57:96:C6:95:9C:05:C9:11:4E:06
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.1px.de, DNS:autoconfig.kontaktformular.de, DNS:autoconfig.ludwigmedia.com, DNS:autoconfig.makershop.de, DNS:autoconfig.ns.de, DNS:autoconfig.pfoerringer.com, DNS:autoconfig.pizzapirates.cy, DNS:autoconfig.signmaker.cy, DNS:autoconfig.stretchtent.cy, DNS:autoconfig.villateam.cy, DNS:autodiscover.1px.de, DNS:autodiscover.kontaktformular.de, DNS:autodiscover.ludwigmedia.com, DNS:autodiscover.makershop.de, DNS:autodiscover.ns.de, DNS:autodiscover.pfoerringer.com, DNS:autodiscover.pizzapirates.cy, DNS:autodiscover.signmaker.cy, DNS:autodiscover.stretchtent.cy, DNS:autodiscover.villateam.cy, DNS:mail.ns.de
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/65.crl
ct_precert_scts
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 15 12:38:26.426 2026 GMT Extensions: 00:00:05:00:42:3F:B1:21 Signature : ecdsa-with-SHA256 30:45:02:20:78:9D:68:71:D1:55:FC:F7:89:61:18:F9: 37:22:EB:35:C7:87:26:A4:2F:79:8A:E1:1B:04:C9:1D: E6:E1:82:0E:02:21:00:B0:39:24:48:9D:86:75:37:B9: DF:CA:A4:A9:E6:7E:CD:46:38:0A:EE:34:42:FC:D6:61: 5B:73:B7:4B:98:FB:C7 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Sep 15 12:38:30.737 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:A9:44:E9:0E:BE:A9:0A:9A:4C:02:C6: 3C:ED:8D:E3:18:9B:0B:43:44:A7:2E:BF:36:B0:D8:4F: B5:AD:00:84:78:02:21:00:C6:DF:DC:BB:83:AB:F2:E6: 32:04:5C:BD:B7:CF:44:2B:67:65:E9:54:83:A3:A9:5D: 0C:30:0D:DE:B3:84:DF:7A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-22T14:47:54+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
711
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
2172
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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