mcusip.run

Observed Aug 11, 2026, 02:38 UTC (4d ago). Every field below was attested with an Ed25519 signature at scan time.

This reading of mcusip.run was taken 4d ago

mcusip.run is on the survey sweep, which works its way across the whole catalog rather than returning to one name on a schedule. Putting mcusip.run 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 mcusip.run Watching a domain needs a DRM3 account. The reading above stays free and public either way.
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Up right now
Secured byLet's Encrypt
IPv6 · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat mcusip.run actually stands on - every host below is a signed observation
mcusip.run
A / AAAA
129.80.241.12603:c020:4018:2800::6927
2603serves the site
NS
gold.foundationdns.comgold.foundationdns.netgold.foundationdns.org
foundationdns.com + foundationdns.net + moreanswers its DNS
TLS
mcusip.run
Let's Encryptissued its certificate

DNS Records

A 1

  • 129.80.241.1

AAAA 1

  • 2603:c020:4018:2800::6927

TXT 1

  • v=spf1 include:rp.oracleemaildelivery.com include:eu.rp.oracleemaildelivery.com ~all

NS 3

  • gold.foundationdns.com
  • gold.foundationdns.net
  • gold.foundationdns.org

SOA 1

  • gold.foundationdns.com dns.cloudflare.com

CAA 10

  • issue "comodoca.com"
  • issue "digicert.com; cansignhttpexchanges=yes"
  • issue "letsencrypt.org"
  • issue "pki.goog; cansignhttpexchanges=yes"
  • issue "ssl.com"
  • issuewild "comodoca.com"
  • issuewild "digicert.com; cansignhttpexchanges=yes"
  • issuewild "letsencrypt.org"
  • issuewild "pki.goog; cansignhttpexchanges=yes"
  • issuewild "ssl.com"

TLS Certificates (3)

Common NameIssuerExpires
mcusip.run C=US, O=Let's Encrypt, CN=YR2 Sat, 26 Sep 2026 04:03:13 +0000
YR2 C=US, O=ISRG, CN=Root YR Sat, 02 Sep 2028 23:59:59 +0000
Root YR C=US, O=Internet Security Research Group, CN=ISRG Root X1 Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (0)

None observed.

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.

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Ed25519 Receipt

Receipt ID
rcpt_a533b56a88d1d016
Output Hash
77ff1561e8459611cd6546cc3902aa92084e0ae96fa21b4f3cc73ae432ced5a5
Signature
ed25519:f02f430c8717ee14f7e69570e06827a8224fec80300de74cb0f63df9654284044d8b0ecbf3c78956f663f4ff74223d67da1f4e56e97f2e908b9fcd75f387c70c
Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent
(genesis)
Plane
fast
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CONTINUOUS INTERNET TELEMETRY24H DRIFT45,328 material changesacross 43,735 domains · 24h to ~2h ago · +1,821 vs yesterdayROTATION56 domains moved DNS from koaladns.com to magpiedns.com, 55 moved backa rotation loop, not a migration · 24hNOW497 curated domains not reachablelast probe, steadySITE ERRORS36,287 sites serving errorslast probe · 5xx / 404 / TLSBOT DEFENSEbot defense observed on 117,270 sites429 rate-limit / 403 bot-block, a posture signal