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
The certificate expires within 30 days.

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
2026-07-03T00:45:42+00:00
Expires
2026-10-01T00:45:41+00:00
Days remaining
7
Serial (hex)
050097A26FE63766548C290C28B70DDB7B06
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

6A:9D:D7:1D:F2:F8:FD:E5:33:9D:A3:08:0D:81:5E:45:6E:11:8E:CA:6E:E9:3B:00:E8:B6:C2:29:CE:73:37:F8
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
86:80:00:F5:28:E4:75:7C:CF:C7:AE:35:17:21:3D:F3:BE:87:4E:16
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/7.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C8:A3:C4:7F:C7:B3:AD:B9:35:6B:01:3F:6A:7A:12:6D: E3:3A:4E:43:A5:C6:46:F9:97:AD:39:75:99:1D:CF:9A Timestamp : Jul 3 01:44:12.117 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:41:2A:1A:ED:74:BD:61:44:15:DA:7F:B8: D9:7B:2E:D6:48:82:71:56:42:7A:70:CC:6F:18:73:38: 2D:11:53:A7:02:21:00:B3:99:52:95:23:33:AB:4A:5B: E3:DA:98:B3:C9:2F:7B:53:38:18:52:B7:F4:63:8E:8B: 46:FD:72:45:C9:F2:54 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86: D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF Timestamp : Jul 3 01:44:12.725 2026 GMT Extensions: 00:00:05:00:25:95:06:D5 Signature : ecdsa-with-SHA256 30:46:02:21:00:F3:7E:95:0E:5D:16:73:33:84:49:E7: 8B:AB:71:6B:3F:08:1F:27:51:7E:94:57:9A:A2:02:AA: 59:37:2F:27:19:02:21:00:A8:3F:73:BE:ED:97:8C:52: 8E:C9:2D:D2:77:D1:9F:E7:97:40:6A:A7:02:F0:30:1E: 04:66:D4:3B:68:CE:EE:1C
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-23T02:11:01+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
710
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
2171
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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