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.bg · 212.36.6.26:443

Verified

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

Subject
C=BG L=Sofia O=A1 Bulgaria EAD CN=*.a1.bg
Issuer
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Valid from
2026-02-11T00:00:00+00:00
Expires
2027-03-14T23:59:59+00:00
Days remaining
172
Serial (hex)
0CAA63B517F42013F49D68AEC9C25F16
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.a1.bg, DNS:a1.bg

SHA-256 fingerprint

90:E4:AC:A4:20:73:B8:E4:3A:95:0F:2D:01:CF:38:BE:88:2C:21:0A:C0:BA:E8:26:3E:BB:9F:70:32:D0:65:3A
Certificate extensions & PEM
authorityKeyIdentifier
74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
subjectKeyIdentifier
E3:E9:A5:24:D3:E5:B7:CD:5A:CA:E2:AC:39:C2:4B:1E:64:12:4B:05
subjectAltName
DNS:*.a1.bg, DNS:a1.bg
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://crl3.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl Full Name: URI:http://crl4.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.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 : Feb 11 13:31:56.141 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:BF:BD:54:77:52:DA:DF:BC:B8:76:71: 07:80:D4:AD:6C:F2:05:C2:16:BF:17:FB:A5:95:CE:C8: F2:5D:B4:7D:1A:02:20:6D:3F:33:61:FE:E3:3F:F9:B9: A9:1A:03:52:91:39:88:8D:19:AF:EE:B3:3F:53:DE:9A: AF:FE:F0:F5:F8:46:C9 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Feb 11 13:31:56.403 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:E1:28:10:2A:6F:F9:9C:E8:46:69:4E: 18:93:C5:8B:D5:21:2C:2C:C3:57:44:8B:E5:82:B6:84: 24:77:C4:A5:B0:02:21:00:A6:54:75:E7:0F:50:C0:E9: C2:66:1C:19:8B:16:FC:B0:13:04:61:B0:D7:7E:1E:82: 33:BA:41:46:5E:57:22:6C Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A2:81:00:18:73:4E:17:6E:1D:47:E0:95:40:F3:81:BA: 54:66:97:CD:63:A8:43:50:71:6E:B8:09:4E:DA:F1:0D Timestamp : Feb 11 13:31:56.551 2026 GMT Extensions: 00:00:05:00:02:63:C3:2A Signature : ecdsa-with-SHA256 30:44:02:20:09:9A:DA:33:8F:7C:61:67:40:0B:A3:2D: 71:0B:54:05:4C:E0:74:77:1C:F8:C7:42:E3:BC:1C:60: 0F:5B:D4:45:02:20:53:5C:60:70:38:04:F7:85:7D:AB: EF:89:70:18:EF:B9:65:EF:92:4E:37:98:84:0B:9C:B4: A1:67:D7:6E:DD:DE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-23T14:47:04+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2021-03-30T00:00:00+00:00
Expires
2031-03-29T23:59:59+00:00
Days remaining
1648
Serial (hex)
0CF5BD062B5602F47AB8502C23CCF066
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

C8:02:5F:9F:C6:5F:DF:C9:5B:3C:A8:CC:78:67:B9:A5:87:B5:27:79:73:95:79:17:46:3F:C8:13:D0:B6:25:A9
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
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
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalRootG2.crt
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.2.1 Policy: 2.23.140.1.1 Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2 Policy: 2.23.140.1.2.3
-----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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