c-learning.jp
Observed Sep 12, 2026, 16:03 UTC (3h ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.
Up right now
Runs onCloudflare
CloudflareEmail byGoogle Workspace
Google WorkspaceAlso usesGoogle Search Console
Google Search Console8 subdomains · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
DRIFTwhat moved on c-learning.jp in the last day, each reading signed
- 3h agoSPF weakened (hard fail removed)
Watch it to get the next change the moment it lands.
HTTPS probe
Up
Responding normally (2xx) 200 OK
HTTP status200
Servercloudflare
TLS protocolHTTP/2
TLS issuernot observed
Behind Cloudflareyes
Response time69 ms
DNS resolutionNOERROR
Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".
SIGNED-OUT VIEW
Provider names, posture and counts are shown. The record values - every DNS answer, each subdomain hostname, raw TXT, IPs, cert names and WHOIS - are the product. Sign in for the full signed record, or use the API with a key.
DNS records 20
A4NS4MX5TXT6SOA1
TLS certificates 0
None.
Subdomains 8
8 subdomain hostnames observed and signed - the list itself is part of the paid record.
The proof
Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 receiptthe raw cryptographic proof
- Receipt ID
rcpt_fb6c464c51bd94ad- Output Hash
6a2cdebcd6f3e86eabae52810f2c9c494abef4baef1a016d7922093517dcd52a- Signature
ed25519:4ec56edc13da3d50644f884b851266797467abbbd0bcf0a5e85aa75ea09ed1c529fded67a1fd655f5ad6dd8eaaa3a0c71753282b5c22c9028b4c80e7859eef0b- Public Key
ed25519:7aad40f2d6399c207fe2fc15aade04a78324787a355d36725cc90687f9e10cff- Parent
(genesis)- Plane
- fast