indexo.dev

headmasteronline.com

.com crawl

First seen 2026-05-15 · Last seen 2026-05-15 · pending crawled 2026-05-19

US · 13.248.160.137 · AS16509 Amazon.com, Inc.

Reputation 92/100 no dmarc policy

http error: ConnectTimeout

Registration

Registrar
Gandi SAS
Created
2004-10-29
Expires
2026-10-29 161 days left
Updated
2025-09-24
Name servers
  • ns-1144.awsdns-15.org
  • ns-1903.awsdns-45.co.uk
  • ns-351.awsdns-43.com
  • ns-961.awsdns-56.net

DNS records live

NS
  • ns-1144.awsdns-15.org
  • ns-1903.awsdns-45.co.uk
  • ns-351.awsdns-43.com
  • ns-961.awsdns-56.net
MX
  • 0 headmasteronline-com.mail.protection.outlook.com
Verified for
  • Microsoft 365

Email authentication weak

SPF
v=spf1 mx include:amazonses.com include:spf.protection.outlook.com include:sendgrid.net -all
strict (-all)
DMARC
not published
DKIM
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz9zrTQ3WJufOcEZQuiSgdr08q1lfPYlYEdqXeuyTDcKOa9My3ecnpA3BCqwpRU9VNEinVaQcpgboREUVy7…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCswtLVHTetBeoh+o6A2EdJ5AAgYT+uQB65R7fSez8q7VJpnVMObmnpQQFxdJuRNLog78GRbVeadC0cxkdD4CcB7B…
selectors probed

Certificate (current)

R12
from 2026-04-09 to 2026-07-08
Expires in 49 days

Full certificate history on crt.sh ↗

Linked from (1)