usefulness.info
Observed Jul 27, 2026, 04:14 UTC (6d 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.
Up right now
Runs onCloudflare
Secured byGoogle Trust Services
IPv6 · domcop
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat usefulness.info actually stands on - every host below is a signed observation
usefulness.info
A / AAAA
104.21.54.251172.67.143.1912606:4700:3030::6815:36fb2606:4700:3034::ac43:8fbf
Cloudflareserves the site
NS
garret.ns.cloudflare.comgigi.ns.cloudflare.com
cloudflare.comanswers its DNS
MX
route2.mx.cloudflare.netroute3.mx.cloudflare.netroute1.mx.cloudflare.net
cloudflare.netreceives its email
TLS
usefulness.info
Google Trust Servicesissued its certificate
DNS Records
A 2
104.21.54.251172.67.143.191
AAAA 2
2606:4700:3030::6815:36fb2606:4700:3034::ac43:8fbf
MX 3
28route2.mx.cloudflare.net8route3.mx.cloudflare.net93route1.mx.cloudflare.net
TXT 1
v=spf1 include:_spf.mx.cloudflare.net ~all
NS 2
garret.ns.cloudflare.comgigi.ns.cloudflare.com
SOA 1
garret.ns.cloudflare.com dns.cloudflare.com
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
usefulness.info |
C=US, O=Google Trust Services, CN=WE1 | Tue, 29 Sep 2026 18:42:54 +0000 |
WE1 |
C=US, O=Google Trust Services LLC, CN=GTS Root R4 | Tue, 20 Feb 2029 14:00:00 +0000 |
GTS Root R4 |
C=BE, O=GlobalSign nv-sa, 2.5.4.11=Root CA, CN=GlobalSign Root CA | Fri, 28 Jan 2028 00:00:42 +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 receiptEd25519 Receipt
- Receipt ID
rcpt_8f13c46646521331- Output Hash
d292cde17ec38654950c6dbce5ec89a632c55317c8f074661454ee9e4f1b295c- Signature
ed25519:e540cafc5c53eb17e97d2addd9be8968bf190ace0573578662d7a6ebecedb813f52a181e2433d4c4a582ddba9a7ba511f80720e92430c3ea322c446454bc6503- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast