r-core.co.jp

Observed Aug 11, 2026, 05:24 UTC (24d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of r-core.co.jp was taken 24d ago

r-core.co.jp is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting r-core.co.jp under watch moves it to the fast lane, where DomainDrift re-checks it about every 5 minutes and signs each reading, so a change becomes a dated event within minutes instead of waiting for the sweep to come round.

Watch r-core.co.jp Watching a domain needs a DRM3 account. The reading above stays free and public either way.
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Guarded by a firewall
Runs onSAKURA Internet
Secured byLet's Encrypt
Also usesGoogle Search Console
1 subdomain · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
DRIFT

Steady. No change on record for r-core.co.jp in the last day; this reading matches the one before it. The steady record is signed like every other reading. Watch it to catch the next move the moment it lands.

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 8

A1NS4MX1TXT1SOA1

TLS certificates 3

Issued byLet's Encrypt
ExpiresMon, 19 Oc (44d)
Certificate nameswithheld

Subdomains 1

1 subdomain hostname 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 receipt
Ed25519 receiptthe raw cryptographic proof
Receipt ID
rcpt_a3fa9e86d8e39192
Output Hash
104aa1e8aaeb4fc2fd7311ca8145751ac216e465fd35b861fe14b6f809812a21
Signature
ed25519:68c8450e7b68649c6d1037530c9f363267fd16fb78d718d7f32115eb209eb8296d68bf22a717f106e8f88f0ae8e1cf0a3efb77c638f9678400755f0c1612390b
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
CONTINUOUS INTERNET TELEMETRY24H DRIFT4,878 material changesacross 2,951 domains · 24h to ~80m ago · -24,959 vs yesterdayROTATION56 domains moved DNS from magpiedns.com to koaladns.com, 49 moved backa rotation loop, not a migration · 24hNOW594 curated domains not reachablelast probe, steadySITE ERRORS17,426 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 79,488 sites429 rate-limit / 403 bot-block, a posture signal