rs21.org.uk

.uk crawl

First seen 2026-04-22 · Last seen 2026-05-13 · ok HTTP 200 6813 ms crawled 2026-05-16

US · 192.124.249.37 · AS30148 Sucuri

Reputation 87/100 weak security headers no dmarc policy

Registration

Registrar
Krystal Hosting Ltd
Created
2013-12-30
Expires
2027-12-30 589 days left
Updated
2025-12-30
Name servers
  • ns1.krystal.co.uk.
  • ns2.krystal.co.uk.

DNS records live

NS
  • ns1.krystal.uk
  • ns2.krystal.uk
MX
  • 10 mx1.krystal.uk
  • 20 mx2.krystal.uk

Email authentication weak

SPF
v=spf1 include:relay.k.io ip4:77.72.2.87 include:sendgrid.net ~all
softfail (~all)
DMARC
not published
DKIM
  • default: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApL7u1DNlJdUCgZo2kYh7gejwyAxrmw4Fw3GBMur21X/k3LYMyzXjdhZLgQgnIMaxDuRDV54bMS2P6T…
selectors probed

Certificate (current)

Starfield Secure Certificate Authority - G2
from 2026-03-21 to 2026-06-19
Expires in 30 days

Linked from (1)