a.co

Observed 2026-07-13T22:09:42.051Z (20h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

1 subdomain · tranco_5k

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

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

a.co

A / AAAA

98.87.170.20244.215.138.8898.87.170.8

Cloudflareserves the site

pdns3.ultradns.orgpdns4.ultradns.orgpdns6.ultradns.co.ukpdns5.ultradns.info+2 more

ultradns.org + ultradns.co.uk + moreanswers its DNS

HTTPS probe

redirect Redirecting (3xx) 302 → http://www.amazon.com/

HTTP status302

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time267 ms

DNS resolutionNOERROR

Redirect chain

http://www.amazon.com/

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

DNS Records

A 3

98.87.170.202
44.215.138.88
98.87.170.8

TXT 1

v=spf1 -all

NS 6

pdns3.ultradns.org
pdns4.ultradns.org
pdns6.ultradns.co.uk
pdns5.ultradns.info
pdns2.ultradns.net
pdns1.ultradns.net

SOA 1

dns-external-master.amazon.com root.amazon.com

TLS Certificates (0)

None.

Subdomains (1)

www.a.co

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 a.co. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: c3d37287-a7d3-419e-b4db-f33974b12a16
Output Hash: 2862333b7c28552cfbb95902bb8290cc8d0d0a58e8968d517556629f60e18b4a
Signature: ed25519:de5de62ee5241322c63671e9e80e051fe84ba4001aa2f549467c03ae4980af603a7167f16581e2e8e22f5dd9d79426c610e4e75a30c36f83d938e188c8d60e04
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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