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

a1.net · 80.75.40.1:443

Verified

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

Subject
C=AT L=Linz O=A1 Telekom Austria AG CN=*.a1.net
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=Thawte TLS RSA CA G1
Valid from
2026-07-07T00:00:00+00:00
Expires
2027-01-21T23:59:59+00:00
Days remaining
118
Serial (hex)
071841FE9E4607C32CFB937D8B2E2C68
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.a1.net, DNS:a1.net

SHA-256 fingerprint

2C:7C:15:D1:EA:36:5F:C9:EA:A3:8C:46:35:FA:BB:8A:00:97:27:11:89:FA:C4:AA:71:81:77:84:3C:94:F0:F1
Certificate extensions & PEM
authorityKeyIdentifier
A5:8C:FE:32:CC:EB:0F:2C:D4:19:C6:08:B8:00:24:88:5D:C3:C5:B7
subjectKeyIdentifier
DC:81:EF:1C:98:A2:3B:ED:64:21:1E:EB:72:32:20:14:49:1B:42:CB
subjectAltName
DNS:*.a1.net, DNS:a1.net
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.thawte.com/ThawteTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.thawte.com CA Issuers - URI:http://cacerts.thawte.com/ThawteTLSRSACAG1.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 : Jul 7 11:09:45.602 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:C5:00:91:FB:CA:E4:91:64:60:14:04: DB:7A:F9:E5:10:20:F9:B2:1F:EA:F3:8F:BF:E1:17:8E: 1A:7B:90:A7:BF:02:20:58:49:48:AF:1D:5C:1C:6B:2B: 8A:69:D2:D1:AB:5F:65:7A:92:B0:22:C9:B8:17:4B:BF: 9D:EE:EA:B7:96:CE:4E 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 : Jul 7 11:09:45.566 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F3:DA:A2:90:FA:32:80:86:8A:E1:A5: 17:05:83:79:1D:2A:56:74:9F:EB:9F:F3:B3:A6:E8:CB: 3D:25:AD:BA:74:02:20:2A:B5:12:33:0B:75:0E:82:E8: E3:9C:87:DE:71:CA:AA:0C:55:EB:74:DE:A1:4A:B7:C6: 94:64:FA:B4:44:32:A3 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 : Jul 7 11:09:45.759 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:65:AD:3A:30:97:48:0F:3B:AE:12:48:1E: EC:CB:12:18:F5:C1:9A:1B:D3:A7:7E:64:64:B1:63:25: BB:2D:E5:5E:02:20:06:D2:8E:B4:BA:F0:74:C8:A6:2A: E0:01:34:92:AC:2A:77:15:EF:E6:A1:B3:F0:6D:B4:08: 4E:BA:98:16:27:4E
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-25T17:53:29+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=Thawte TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:24:25+00:00
Expires
2027-11-02T12:24:25+00:00
Days remaining
402
Serial (hex)
090EE8C5DE5BFA62D2AE2FF7097C4857
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

4B:CC:5E:23:4F:E8:1E:DE:4E:AF:88:3A:A1:9C:31:33:5B:0B:26:E8:5E:06:6B:99:45:E4:CB:61:53:EB:20:C2
Certificate extensions & PEM
subjectKeyIdentifier
A5:8C:FE:32:CC:EB:0F:2C:D4:19:C6:08:B8:00:24:88:5D:C3:C5:B7
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

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