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

plnfilter.fi · 37.233.88.25:443

Verified

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

Subject
CN=whcweb.fi
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-05T09:14:49+00:00
Expires
2027-01-03T09:14:48+00:00
Days remaining
88
Serial (hex)
0633CCEB5431EA41887C675A49BB3AE2AC84
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.planeetta.com, DNS:*.planeettamail.fi, DNS:*.planeettaweb.fi, DNS:*.pln.fi, DNS:*.plnfilter.fi, DNS:*.whcweb.fi, DNS:planeetta.com, DNS:planeettamail.fi, DNS:planeettaweb.fi, DNS:pln.fi, DNS:plnfilter.fi, DNS:whcweb.fi

SHA-256 fingerprint

08:93:62:45:C1:2C:59:E8:A3:F1:74:E1:30:8F:BA:18:E3:C5:35:D8:BB:65:BD:80:DD:B2:23:B2:A5:A6:12:3B
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
02:A1:C4:A6:35:CB:74:58:08:DA:50:0F:D8:59:90:99:8C:9F:BC:F9
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:*.planeetta.com, DNS:*.planeettamail.fi, DNS:*.planeettaweb.fi, DNS:*.pln.fi, DNS:*.plnfilter.fi, DNS:*.whcweb.fi, DNS:planeetta.com, DNS:planeettamail.fi, DNS:planeettaweb.fi, DNS:pln.fi, DNS:plnfilter.fi, DNS:whcweb.fi
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/5.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:A2:39:67:C6:0D:B6:46:87:C6:6F:3D:F9:99:94:76: 93:A6:A6:11:20:84:57:D5:55:E7:E3:D0:A1:D9:B6:46 Timestamp : Oct 5 10:13:19.371 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:45:EC:2E:96:17:AA:AD:81:E2:21:A6:E7: 6E:73:87:48:E5:94:5C:18:F3:AB:70:33:CD:E2:FB:55: 80:F3:E0:6D:02:20:53:C1:BE:3D:4E:DB:85:56:82:56: 4E:D3:3F:91:05:90:00:3D:A5:C6:8D:8D:BA:48:39:BB: 58:06:5F:DD:11:EA Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Oct 5 10:13:19.467 2026 GMT Extensions: 00:00:05:00:07:9E:25:3B Signature : ecdsa-with-SHA256 30:45:02:21:00:C7:82:33:15:FC:EC:F5:42:DF:B6:30: A8:F7:3D:6D:91:6C:04:F1:5C:DC:6A:87:6F:29:4E:51: 1B:C1:48:B7:85:02:20:1D:7C:01:46:90:61:87:D3:1E: A9:45:82:E7:06:70:42:57:22:E5:EE:EC:6A:2C:2B:57: 07:FE:1C:26:09:91:59
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-07T02:53:11+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
696
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
2157
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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