usopen.org

Observed Jul 21, 2026, 19:17 UTC (1d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation — watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Not responding

Runs onAkamai Technologies

Email byMandrill (Mailchimp)

Secured byDigiCert

Also usesFacebook/MetaGoogle Search Console

IPv6 · 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

23.49.178.1362600:1408:c400:f88::26a42600:1408:c400:f91::26a4

Akamai Technologiesserves the site

a10-64.akam.neta3-66.akam.neta4-67.akam.neta1-9.akam.net+2 more

akam.netanswers its DNS

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

Mandrill (Mailchimp)receives its email

TLS

*.usopen.org

DigiCert Incissued its certificate

DNS Records

A 1

23.49.178.136

AAAA 2

2600:1408:c400:f88::26a4
2600:1408:c400:f91::26a4

MX 1

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

TXT 9

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

NS 6

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

SOA 1

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

TLS Certificates (2)

Common Name	Issuer	Expires
`*.usopen.org`	C=US, O=DigiCert Inc, CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1	Thu, 24 Sep 2026 23:59:59 +0000
`DigiCert Global G2 TLS RSA SHA256 2020 CA1`	C=US, O=DigiCert Inc, 2.5.4.11=www.digicert.com, CN=DigiCert Global Root G2	Sat, 29 Mar 2031 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; 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: rcpt_a0b15250e2dc08a9
Output Hash: ab57847e1c0a90f06edf0150b72063122b0e4f8497baac55988b6202d64715ad
Signature: ed25519:4cd9627a17c9a1dfeeab3f659d7cb4dcf16f99fa1a199d193a06653e38f012bfb049ab9326fa509e0933c8970b4501b17ecac2da5d165116fcb202e12b42f306
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

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