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

as207592.net · 134.76.9.42:443

Verified

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

Subject
CN=as207592.net
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-08-22T16:42:04+00:00
Expires
2026-11-20T16:42:03+00:00
Days remaining
41
Serial (hex)
0620A0E741D108AF6FD4522086EF2C48213C
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:as207592.net, DNS:eduroam.mpg.de, DNS:guestnet.gwdg.de, DNS:netinfo.gwdg.de, DNS:netportal.gwdg.de, DNS:netzinfo.gwdg.de, DNS:netzportal.gwdg.de, DNS:voucher.gwdg.de, DNS:wlan.gwdg.de, DNS:www.as207592.net, DNS:www.netinfo.gwdg.de, DNS:www.netzinfo.gwdg.de, DNS:www.netzportal.gwdg.de

SHA-256 fingerprint

DA:A6:E1:E6:39:43:22:01:22:5D:EE:D3:F0:37:73:A4:90:A6:21:20:73:7E:7D:00:A2:F5:4B:9E:88:CC:7E:6B
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
E1:7A:A9:67:07:B5:26:58:1E:3D:F2:47:A9:17:7B:7D:7F:B1:70:35
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:as207592.net, DNS:eduroam.mpg.de, DNS:guestnet.gwdg.de, DNS:netinfo.gwdg.de, DNS:netportal.gwdg.de, DNS:netzinfo.gwdg.de, DNS:netzportal.gwdg.de, DNS:voucher.gwdg.de, DNS:wlan.gwdg.de, DNS:www.as207592.net, DNS:www.netinfo.gwdg.de, DNS:www.netzinfo.gwdg.de, DNS:www.netzportal.gwdg.de
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/61.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Aug 22 17:40:34.576 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:7E:F3:AA:89:E1:B9:44:7D:29:4F:B6:8C: 3D:F0:AE:BC:59:F9:9D:39:9C:79:45:DB:68:E3:13:E3: 6E:13:AA:9B:02:21:00:D8:54:FF:74:82:D5:D4:9F:93: 14:4D:64:75:46:F9:0B:5A:C4:BE:D1:2A:E9:1F:8B:61: AF:BB:2F:56:43:9A:4E Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 6C:FE:50:19:43:A8:5E:A9:16:BC:52:D1:33:E4:DC:C9: 1E:F1:41:1C:7D:25:84:20:D1:73:80:9E:18:18:EB:3A Timestamp : Aug 22 17:40:34.993 2026 GMT Extensions: 00:00:05:00:23:46:F1:DF Signature : ecdsa-with-SHA256 30:45:02:21:00:B3:57:3A:13:59:12:91:DE:65:9E:84: AA:21:B5:7E:2D:D3:F9:BD:75:12:F9:AE:44:A7:2A:93: E5:D7:CE:65:E6:02:20:74:74:54:E8:A5:1E:ED:AD:96: 38:50:67:B2:CC:5D:91:50:07:31:F8:8F:8E:A3:15:72: 22:BA:FC:46:58:D2:A8
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-09T17:56:36+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
694
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
2155
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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