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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

mailspace.org · 109.71.54.108:443

Verified

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

Subject
CN=ams01.mailspace.org
Issuer
C=AT O=ZeroSSL GmbH CN=ZeroSSL ECC DV SSL CA 2
Valid from
2026-09-28T00:00:00+00:00
Expires
2026-12-27T23:59:59+00:00
Days remaining
48
Serial (hex)
D6F59A6B3F9F6CF755B2C7D552A37656
Signature
ecdsa-with-SHA256
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:ams01.mailspace.org, DNS:ams02.mailspace.org, DNS:ams03.mailspace.org, DNS:mailspace.org

SHA-256 fingerprint

30:7F:AB:ED:AE:CC:D5:36:E1:A0:3C:E6:EF:0B:45:58:C9:AF:2F:D4:04:6C:94:8D:22:24:D8:CD:61:20:6C:CA
Certificate extensions & PEM
authorityKeyIdentifier
94:45:9F:DA:51:47:71:D5:73:AE:AC:1D:AB:08:72:12:6D:AD:7C:62
subjectKeyIdentifier
5B:BC:A1:79:9A:17:CD:4E:30:6C:E1:D4:02:68:E9:AE:7D:12:0D:58
keyUsage
Digital Signature
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/ZeroSSLECCDVSSLCA2.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:ams01.mailspace.org, DNS:ams02.mailspace.org, DNS:ams03.mailspace.org, DNS:mailspace.org
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Sep 28 12:30:09.623 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:32:D9:C3:DA:2D:39:3E:98:17:E2:71:5F: 3E:D4:92:E2:B1:48:8C:A8:2E:0E:06:07:E7:5C:76:17: DD:D7:4A:8E:02:21:00:EE:E0:4D:58:9C:64:72:D9:21: C7:37:65:F8:6E:C1:16:2B:49:09:77:9C:62:DE:B4:28: B1:F4:89:1C:8C:AC:FB 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 : Sep 28 12:30:09.653 2026 GMT Extensions: 00:00:05:00:17:26:C4:9E Signature : ecdsa-with-SHA256 30:45:02:21:00:8F:B1:7F:38:5F:C5:F8:B6:0C:B0:7F: 7B:48:37:DD:83:83:74:16:DB:83:7E:3A:BC:B5:81:25: 82:B6:7C:B4:6A:02:20:23:D5:09:B4:49:95:61:2C:0A: 28:8C:4C:10:D2:7F:32:A9:2F:AD:75:3D:36:F6:5C:4B: 88:98:AD:03:BA:FE:71
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-09T04:54:52+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=AT O=ZeroSSL GmbH CN=ZeroSSL ECC DV SSL CA 2
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root E46
Valid from
2025-09-24T00:00:00+00:00
Expires
2035-09-23T23:59:59+00:00
Days remaining
3240
Serial (hex)
C4E1C5BB00F0278F347BE4F85D63FCCA
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

BE:C8:4F:CE:0D:AA:42:3F:3B:3E:ED:38:EA:48:06:6C:C5:61:8F:52:44:AD:65:CD:9F:86:24:A8:13:FA:4C:3D
Certificate extensions & PEM
authorityKeyIdentifier
D1:22:DA:4C:59:F1:4B:5F:26:38:AA:9D:D6:EE:EB:0D:C3:FB:A9:61
subjectKeyIdentifier
94:45:9F:DA:51:47:71:D5:73:AE:AC:1D:AB:08:72:12:6D:AD:7C:62
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationRootE46.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationRootE46.p7c OCSP - URI:http://ocsp.sectigo.com
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root E46
Issuer
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust ECC Certification Authority
Valid from
2021-03-22T00:00:00+00:00
Expires
2038-01-18T23:59:59+00:00
Days remaining
4088
Serial (hex)
1A9EAFEC6DE8E19B5C193141B68D90DD
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

EA:6B:89:ED:69:07:A2:09:FF:91:88:67:6F:B1:64:E7:AC:ED:89:4B:89:96:DF:BE:5C:E5:BB:CC:22:DE:4D:DD
Certificate extensions & PEM
authorityKeyIdentifier
3A:E1:09:86:D4:CF:19:C2:96:76:74:49:76:DC:E0:35:C6:63:63:9A
subjectKeyIdentifier
D1:22:DA:4C:59:F1:4B:5F:26:38:AA:9D:D6:EE:EB:0D:C3:FB:A9:61
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy
crlDistributionPoints
Full Name: URI:http://crl.usertrust.com/USERTrustECCCertificationAuthority.crl
authorityInfoAccess
OCSP - URI:http://ocsp.usertrust.com
-----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.

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