usopen.org

Observed 2026-07-12T17:03:15.599Z (19h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byMandrill (Mailchimp)

Also usesFacebook/MetaGoogle Search Console

IPv6 · 3 subdomains · sports_entertainment

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat usopen.org actually stands on - every host below is a signed observation

usopen.org

A / AAAA

184.30.82.2172600:1405:7400:58f::26a42600:1405:7400:580::26a4

Cloudflareserves the site

a7-64.akam.neta3-66.akam.neta10-64.akam.neta12-65.akam.net+2 more

akam.netanswers its DNS

inbound-smtp.us-east-1.amazonaws.com

Mandrill (Mailchimp)receives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://www.usopen.org/index.html

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time1877 ms

DNS resolutionNOERROR

Redirect chain

https://www.usopen.org/index.html

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

184.30.82.217

AAAA 2

2600:1405:7400:58f::26a4
2600:1405:7400:580::26a4

MX 1

10inbound-smtp.us-east-1.amazonaws.com

TXT 9

6gs3z313xjxh9g0cslqlx4wdglq2g9b6
2hl94zvzhyhzk9100sj2f2vmqpz0mppl
v=spf1 include:spf.mandrillapp.com ~all
facebook-domain-verification=l9i1fk26ka3vl9oh7fofeyofz43n5x
jdbz0r23xjvnw1x7gpq6tvsp5358rd14
_3082trc4bfzbx3xwmnc0jfs6bdfe99r
google-site-verification=B6KTldJ4NL0MBxA2NfRHRHFT7t0aQVp-urj_EtRFCAo
mandrill_verify.al3C42QD5GAoJwzbFKDqcA
google-site-verification=qYnpub4COmNjc63nzwS4TZdOLqi7LxZG4mG38mEcJ3w

NS 6

a7-64.akam.net
a3-66.akam.net
a10-64.akam.net
a12-65.akam.net
a1-9.akam.net
a4-67.akam.net

SOA 1

a1-9.akam.net hostmaster.usopen.org

TLS Certificates (0)

None.

Subdomains (3)

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; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for usopen.org. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/usopen.org">
  <img src="https://domaindrift.io/badge/usopen.org.svg"
       width="300" height="64" alt="DomainDrift signed observations for usopen.org">
</a>

Ed25519 Receipt

Receipt ID: 45a8bbed-4b10-49d5-9061-7db17c55ca24
Output Hash: 007237a213d0f7c6a504b52805d07b71598259d5b2b55bb6f001d0c9ba93663e
Signature: ed25519:d53925c1d4c3bc39c53ed298d72be5c8b94f606f8243da14224e20e4b0b64afd221d789da6b7d5db246cab71441641ff1c5befc9a4bc46932eb0a3116e8dbb05
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/usopen.org