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

c.mx.fluent.ltd.uk · 195.78.94.150:443

Verified

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

Subject
CN=mail.fluent.ltd.uk
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-09-06T09:28:03+00:00
Expires
2026-12-05T09:28:02+00:00
Days remaining
47
Serial (hex)
0596782B26C54464D268EE1FBAA1BF36B114
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:c.mx.fluent.ltd.uk, DNS:fluent2.fluent.ltd.uk, DNS:mail.fluent.ltd.uk, DNS:smtp1.fluent.ltd.uk, DNS:smtp2.fluent.ltd.uk, DNS:smtpgw.fluent.ltd.uk, DNS:webmail.fluent.ltd.uk, DNS:z.mx.fluent.ltd.uk

SHA-256 fingerprint

77:60:3C:65:98:99:11:9B:99:A0:53:85:9B:C3:4D:07:FE:CA:AF:53:79:05:00:D2:2A:61:62:5F:99:CF:DE:DA
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
15:03:1F:37:46:F5:13:B3:16:4B:15:FC:86:4D:97:93:A9:13:EA:97
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:c.mx.fluent.ltd.uk, DNS:fluent2.fluent.ltd.uk, DNS:mail.fluent.ltd.uk, DNS:smtp1.fluent.ltd.uk, DNS:smtp2.fluent.ltd.uk, DNS:smtpgw.fluent.ltd.uk, DNS:webmail.fluent.ltd.uk, DNS:z.mx.fluent.ltd.uk
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/21.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Sep 6 10:26:33.094 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:48:14:C7:B9:90:B7:D9:33:8C:79:BF:88: 3B:AB:C1:27:A8:2A:B6:E6:57:62:0D:B8:11:29:B8:D1: D3:3B:7C:5F:02:20:56:FF:88:10:88:0F:1B:06:2F:EA: B6:C2:C3:78:96:62:5D:BC:B1:8B:5D:FB:08:1B:82:E1: 5D:BE:E0:74:9E:05 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A8:26:CB:E3:0A:C6:35:12:46:53:3F:E0:65:F1:4F:19: D9:6E:19:08:13:C4:1D:D9:6D:79:00:B3:12:3C:55:27 Timestamp : Sep 6 10:26:34.048 2026 GMT Extensions: 00:00:05:00:2D:19:0B:81 Signature : ecdsa-with-SHA256 30:46:02:21:00:8E:B2:64:D1:C9:80:B9:68:2C:3A:4F: 01:3C:DB:4A:2C:38:AC:C6:39:4D:BE:CB:FA:2F:D3:69: EE:7C:65:71:E5:02:21:00:CA:7A:A0:B6:B2:E3:1F:72: C5:EB:FE:33:34:21:F0:0B:0D:2B:DB:CA:90:B1:8D:98: 5D:9E:92:BB:F4:30:0B:D9
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-19T03:05:59+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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