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.foilhat.io · 91.231.153.28:443

Verified

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

Subject
CN=mail.foilhat.io
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-15T08:08:31+00:00
Expires
2027-01-13T08:08:30+00:00
Days remaining
78
Serial (hex)
05FD11C3025344B079CFE46C34DA5DDDCE8F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.bahl.se, DNS:autoconfig.encroute.com, DNS:autoconfig.foilhat.io, DNS:autoconfig.foilhat.net, DNS:autoconfig.ipexcess.com, DNS:autoconfig.jellyfrog.se, DNS:autoconfig.nessla.se, DNS:autoconfig.veritascarbo.se, DNS:autodiscover.bahl.se, DNS:autodiscover.encroute.com, DNS:autodiscover.foilhat.io, DNS:autodiscover.foilhat.net, DNS:autodiscover.ipexcess.com, DNS:autodiscover.jellyfrog.se, DNS:autodiscover.nessla.se, DNS:autodiscover.veritascarbo.se, DNS:mail.foilhat.io

SHA-256 fingerprint

7D:99:0C:7A:7E:18:AC:B0:96:0D:97:DE:85:80:0D:D6:0A:DC:E1:C9:D9:6B:B1:DF:70:D1:DD:48:81:7F:86:5E
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
CC:8B:42:17:60:1B:FD:D3:F1:65:93:14:7C:6C:4D:F4:D6:D3:4B:4D
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.bahl.se, DNS:autoconfig.encroute.com, DNS:autoconfig.foilhat.io, DNS:autoconfig.foilhat.net, DNS:autoconfig.ipexcess.com, DNS:autoconfig.jellyfrog.se, DNS:autoconfig.nessla.se, DNS:autoconfig.veritascarbo.se, DNS:autodiscover.bahl.se, DNS:autodiscover.encroute.com, DNS:autodiscover.foilhat.io, DNS:autodiscover.foilhat.net, DNS:autodiscover.ipexcess.com, DNS:autodiscover.jellyfrog.se, DNS:autodiscover.nessla.se, DNS:autodiscover.veritascarbo.se, DNS:mail.foilhat.io
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/16.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A2:81:00:18:73:4E:17:6E:1D:47:E0:95:40:F3:81:BA: 54:66:97:CD:63:A8:43:50:71:6E:B8:09:4E:DA:F1:0D Timestamp : Oct 15 09:07:01.653 2026 GMT Extensions: 00:00:05:00:24:68:92:D0 Signature : ecdsa-with-SHA256 30:45:02:21:00:B9:27:B2:90:2C:A9:DF:59:EA:56:A2: 23:4E:83:3D:77:FD:4F:45:E6:47:C0:53:69:6F:7A:BE: 37:28:CC:DE:01:02:20:1F:D4:15:22:2F:7A:AD:87:61: 48:7C:A0:AF:AB:EB:D4:9E:10:C3:B1:FF:BE:A9:BB:CB: 7D:DC:CD:22:EC:CB:D8 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Oct 15 09:07:01.499 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:72:0D:5F:7E:1E:D8:A7:EA:A2:7F:D4:BA: 6C:0F:96:D5:36:5F:8E:AA:85:78:01:C2:B4:F8:E7:E3: 95:52:52:D4:02:20:40:18:43:A2:A9:63:36:52:3F:BF: 78:FF:6A:45:E6:FF:85:44:31:91:54:56:7F:80:47:FB: 8E:A4:26:47:7D:D5
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-26T13:48:18+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
677
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
2138
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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