mattmahoney.net

Last scanned 4h ago; the signed record is unchanged since 23d 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 onMicrosoft Corporation
Secured byLet's Encrypt
Registered withTucows Domains Inc.
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 mattmahoney.net 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 6

A1NS2MX2SOA1

TLS certificates 3

Issued byLet's Encrypt
ExpiresMon, 21 Se (18d)
Certificate nameswithheld

Subdomains 1

1 subdomain hostname observed and signed - the list itself is part of the paid record.

WILDCARD DNSobserved 2026-09-03 04:25 UTC

DomainDrift asked this domain for one hostname that nobody ever registered, and it answered. A domain that answers invented hostnames is running wildcard DNS. It is common and usually deliberate. A SaaS platform gives every customer a subdomain this way. How the check works

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_628600d1225e734b
Output Hash
90bbb558b4dd195b84e58eb09a57874e874da59ff993e03789a7e4fd92abcc06
Signature
ed25519:b8b2974012b1f5823dc7a77b0d6132f92c05aeae7e8232684179c0252eaf99eaba9ec627b6e319fafb0b0f972db383c3081cf0e17c0f5fc3cd39c1d57024e700
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
CONTINUOUS INTERNET TELEMETRY24H DRIFT26,858 material changesacross 20,363 domains · 24h to ~2h agoROTATION53 domains moved DNS from magpiedns.com to koaladns.com, 46 moved backa rotation loop, not a migration · 24hCERT DRIFT2 domains switched issuing CA24hREGISTRAR DRIFT5 changed registrar24hNOW606 curated domains not reachablelast probe, steadySITE ERRORS17,398 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 79,531 sites429 rate-limit / 403 bot-block, a posture signal