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

mail.airnet.bg · 109.120.221.253:443

Verified

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

Subject
CN=mail.airnet.bg
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-11-07T16:38:13+00:00
Expires
2027-02-05T16:38:12+00:00
Days remaining
87
Serial (hex)
056EFD42BFB6A1786C458C4D9A8F2422B9E2
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.ardax.net, DNS:autodiscover.airnet.bg, DNS:autodiscover.ardax.net, DNS:mail.airnet.bg, DNS:webmail.airnet.bg

SHA-256 fingerprint

11:C4:90:F3:E3:ED:3C:84:10:AC:01:F0:57:EF:AD:C8:4F:8B:9B:7F:1E:A4:67:33:BD:78:E0:4A:52:0E:9E:4A
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
DE:A3:1D:7B:87:47:E0:D8:D8:77:6C:78:7D:5A:E4:1D:CD:68:A0:90
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:autoconfig.ardax.net, DNS:autodiscover.airnet.bg, DNS:autodiscover.ardax.net, DNS:mail.airnet.bg, DNS:webmail.airnet.bg
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/99.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 7 17:36:43.958 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:48:BF:B7:3C:19:24:AB:A9:33:5A:50:2C: C1:79:33:BB:F7:0E:B6:BA:13:FC:17:55:61:F5:45:A7: 1F:E8:EA:A7:02:21:00:FE:55:9C:6C:A5:95:40:50:D0: 88:B5:36:AB:1C:B0:42:57:B0:8B:56:7B:64:7D:00:9F: 63:28:B1:E1:48:31:28 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Nov 7 17:36:44.044 2026 GMT Extensions: 00:00:05:00:1E:D6:09:C5 Signature : ecdsa-with-SHA256 30:45:02:20:05:FA:67:3E:6F:91:45:09:B0:0B:A1:13: FD:76:07:6F:CC:C3:B8:D5:3B:2E:96:B3:C8:5E:52:EF: 31:D1:30:38:02:21:00:A8:C7:6C:A8:57:52:16:1D:8A: 89:A8:05:83:E2:BF:DB:9B:83:36:5F:0F:A0:E7:31:A3: B1:14:34:A5:8A:A9:A5
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-09T22:20:04+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
663
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
2124
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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