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

1und1.de · 217.160.72.6:443

Verified

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

Subject
C=DE L=Montabaur O=1&1 Telecommunication SE CN=*.1und1.de
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=GeoTrust TLS RSA CA G1
Valid from
2026-06-19T00:00:00+00:00
Expires
2027-01-03T23:59:59+00:00
Days remaining
102
Serial (hex)
0AF9D51F9BEC8F05A9318B5ED5B10A8D
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.1und1.de, DNS:1und1.de

SHA-256 fingerprint

4E:9B:A1:57:D6:B2:FD:50:9B:C7:ED:38:84:A5:A0:37:F8:17:CB:12:F7:7C:FF:FA:0F:80:84:D7:29:72:11:86
Certificate extensions & PEM
authorityKeyIdentifier
94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
subjectKeyIdentifier
C5:FA:F9:D1:3E:1E:9E:14:75:AD:07:1D:7A:A3:90:25:5D:42:36:E2
subjectAltName
DNS:*.1und1.de, DNS:1und1.de
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://cdp.geotrust.com/GeoTrustTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.geotrust.com CA Issuers - URI:http://cacerts.geotrust.com/GeoTrustTLSRSACAG1.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Jun 19 10:10:52.577 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:C6:7E:81:FF:D0:83:3E:A8:B6:BD:70: 5F:DC:25:E8:1E:28:77:B8:64:B4:E3:27:BC:A0:83:B2: 82:1F:45:C1:19:02:20:25:66:E1:49:3D:D5:4D:BC:31: D8:28:22:16:79:AF:C1:60:D9:F5:EA:E5:57:63:3B:3C: BD:E2:DF:32:93:28:C1 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Jun 19 10:10:52.662 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:96:39:78:0A:49:59:50:56:7F:A0:CF: 74:A8:31:E7:7A:42:F8:34:34:E7:66:6A:DF:2E:BD:DB: B5:24:75:00:76:02:21:00:A1:07:91:61:88:74:37:C8: A5:68:19:51:9B:1B:5A:90:9E:BF:8F:6B:A8:02:0C:EE: FA:B2:2F:30:3D:D4:1C:7D Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Jun 19 10:10:52.696 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:08:88:99:92:79:3D:B0:50:BE:DF:29:EA: 1F:E5:33:D1:CA:F1:6D:B9:2A:54:EB:39:86:E0:71:E5: 33:8B:98:34:02:20:25:A4:BF:93:2D:70:C4:9F:27:86: B1:B9:A2:DB:67:F3:C9:22:3D:2E:23:0E:66:D0:2A:CE: B6:38:FF:5F:95:98
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-23T08:05:13+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=GeoTrust TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:23:37+00:00
Expires
2027-11-02T12:23:37+00:00
Days remaining
405
Serial (hex)
0D07782A133FC6F9A57296E131FFD179
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

C0:6E:30:7F:7C:FC:1D:32:FA:72:A4:C0:33:C8:7B:90:01:9A:F2:16:F0:77:5D:64:97:8A:2E:CA:6C:8A:23:0E
Certificate extensions & PEM
subjectKeyIdentifier
94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.digicert.com/CPS
-----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

Registration / WHOIS →DNS records →