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=YR1
Valid from
2026-09-27T11:43:41+00:00
Expires
2026-12-26T11:43:40+00:00
Days remaining
50
Serial (hex)
05CD56500341466BC55C490AD1746310BEF4
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

3C:4B:C4:A3:7C:6F:21:E5:19:4F:06:C6:EF:E7:AF:7A:23:1D:51:B7:41:C8:80:47:3C:67:9E:F4:8E:EB:67:64
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
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.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://yr1.c.lencr.org/117.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E: F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7 Timestamp : Sep 27 12:42:11.439 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:5D:4C:7E:AB:42:8E:90:38:F9:B0:A7:C6: ED:E0:B5:33:E5:0E:DF:BA:71:CE:55:AC:88:EA:EF:EC: 67:CF:5F:25:02:20:4E:1C:02:81:F4:2B:B9:40:6F:3B: 6B:18:FE:E5:DF:28:18:C7:F9:61:C7:49:1D:7C:97:17: E2:E8:D8:BC:C2:32 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 : Sep 27 12:42:11.862 2026 GMT Extensions: 00:00:05:00:16:46:89:9E Signature : ecdsa-with-SHA256 30:44:02:20:48:0B:81:99:38:88:08:01:42:40:75:45: 9D:5B:26:05:78:21:5D:44:D6:FE:99:E1:7F:48:DD:5B: FE:E7:2F:72:02:20:2F:A3:FE:21:95:11:A5:34:EA:E9: EC:3C:79:05:85:58:B2:4D:78:78:EF:A3:0C:D5:0D:F2: E6:FD:07:09:C2:9B
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-05T19:44:24+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
667
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
2128
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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