fullstackopen.com

Last scanned 13h ago; the signed record is unchanged since 11d ago. Every field below carries an Ed25519 signature from that last reading. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Up right now
Runs onFastly
Secured byLet's Encrypt
Registered withGoDaddy.com, LLC
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 fullstackopen.com 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

A4NS2TXT1SOA1

TLS certificates 3

Issued byLet's Encrypt
ExpiresWed, 23 Se (31d)
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_8b27b547fd75e10a
Output Hash
2f721a977f3c5be491c12d2886b4ff9a30215be71497c8f7fbfd44a1fee76294
Signature
ed25519:efd3f5aea393acbcaef73e2f35d65715ce59deec184fb2d4b28e19b0fc433ef8bd030ea00435e1d791e0744ccb189eac9fcd51940aa493ec3f0f450d89080508
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
CONTINUOUS INTERNET TELEMETRY24H DRIFTat least 27,483 material changesacross 16,090+ domains · 24h to ~4h ago · a floor, 20h of 24 walkedROTATION58 domains moved DNS from kirklanddc.com to magpiedns.com, 44 moved backa rotation loop, not a migration · 24hEMAIL DRIFT3 domains switched email provider24hCERT DRIFT1 domains switched issuing CA24hREGISTRAR DRIFT1 changed registrar24hNOW239 curated domains not reachable+30 vs yesterdaySITE ERRORS17,811 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 79,299 sites429 rate-limit / 403 bot-block, a posture signal