rsf.is

Observed Jul 25, 2026, 19:27 UTC (7d 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

Up right now

Email byMicrosoft 365

Secured byAmazon

tranco

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

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

rsf.is

A / AAAA

3.167.88.553.167.88.1003.167.88.603.167.88.51

unattributedserves the site

ns-1147.awsdns-15.orgns-1869.awsdns-41.co.ukns-45.awsdns-05.comns-722.awsdns-26.net

awsdns-15.org + awsdns-41.co.uk + moreanswers its DNS

rsf-is.mail.protection.outlook.com

Microsoft 365receives its email

TLS

rsf.is

Amazonissued its certificate

DNS Records

A 4

3.167.88.55
3.167.88.100
3.167.88.60
3.167.88.51

MX 1

0rsf-is.mail.protection.outlook.com

TXT 2

v=spf1 include:spf.protection.outlook.com include:amazonses.com -all
v=DMARC1; p=none;adkim=r; aspf=r;

NS 4

ns-1147.awsdns-15.org
ns-1869.awsdns-41.co.uk
ns-45.awsdns-05.com
ns-722.awsdns-26.net

SOA 1

ns-1147.awsdns-15.org awsdns-hostmaster.amazon.com

SRV 1

cpanelemaildiscovery.cpanel.net:443 p0

TLS Certificates (3)

Common Name	Issuer	Expires
`rsf.is`	C=US, O=Amazon, CN=Amazon RSA 2048 M04	Sat, 09 Jan 2027 23:59:59 +0000
`Amazon RSA 2048 M04`	C=US, O=Amazon, CN=Amazon Root CA 1	Fri, 23 Aug 2030 22:26:35 +0000
`Amazon Root CA 1`	C=US, ST=Arizona, L=Scottsdale, O=Starfield Technologies, Inc., CN=Starfield Services Root Certificate Authority - G2	Thu, 31 Dec 2037 01:00:00 +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 rsf.is. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_71958888c7e04507
Output Hash: f611309f8010e51f415be13c66648de21a7838e723c05c296a931bdfa0b3cc6e
Signature: ed25519:e4d4470f70170af7a5d808875bdab8a1ffb9c59c6d30fd6c502913bed8836af114d6fd307dc7a7e91037be5697b1c6ed413ce1cdc888b05e50215028a80b020c
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/rsf.is