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

freifunk.net · 89.58.42.2:443

Verified

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

Subject
CN=freifunk.net
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-11-01T01:46:22+00:00
Expires
2027-01-30T01:46:21+00:00
Days remaining
84
Serial (hex)
05DEBE6D1874D7A9B0D38D9CD9350D64C698
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:altmark.freifunk.net, DNS:foerderverein.freie-netzwerke.de, DNS:freifunk.net, DNS:fuerstenwalde.freifunk.net, DNS:nms.freifunk.net, DNS:radio.freifunk.net, DNS:siegerland.freifunk.net, DNS:trier.freifunk.net, DNS:www.freifunk.net

SHA-256 fingerprint

5A:E9:92:25:C7:E1:E5:41:BD:13:97:7A:AF:A6:3C:C2:53:47:3A:7E:69:B9:CE:0E:B0:01:BC:D3:97:ED:C3:D1
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
59:0C:2D:96:B6:06:19:48:05:AF:50:7A:6C:E6:63:4A:68:E5:C5:5E
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:altmark.freifunk.net, DNS:foerderverein.freie-netzwerke.de, DNS:freifunk.net, DNS:fuerstenwalde.freifunk.net, DNS:nms.freifunk.net, DNS:radio.freifunk.net, DNS:siegerland.freifunk.net, DNS:trier.freifunk.net, DNS:www.freifunk.net
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/25.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 : Nov 1 02:44:52.313 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:DA:54:07:51:7A:E8:44:4B:66:AD:62: 51:DD:3A:0A:FF:AC:9A:11:FD:E0:C0:AA:30:60:C3:36: 34:93:57:3C:43:02:20:26:23:D3:80:53:8A:F6:B0:D7: F4:92:A0:25:EB:C0:13:21:04:87:11:E3:B5:43:A5:0F: 86:FC:2F:9F:AC:21:34 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 : Nov 1 02:44:53.148 2026 GMT Extensions: 00:00:05:00:34:83:B8:D2 Signature : ecdsa-with-SHA256 30:45:02:20:1B:1A:E3:1F:58:83:98:7A:D2:F6:FE:2B: C6:D2:D3:9E:38:4A:C2:BD:42:4E:D6:7D:49:CF:DB:B9: 0F:29:C2:C1:02:21:00:84:6B:02:04:64:94:6E:41:32: 45:A5:A3:95:B5:09:9C:28:71:71:5C:87:99:D7:2E:35: F0:68:0B:3C:32:9A:B6
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-06T02:40:47+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
666
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
2127
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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