jeffsys.net

.net dns crawl

First seen 2026-05-02 · Last seen 2026-05-20 · ok HTTP/1.1 200 2268 ms crawled 2026-05-08

US · 104.194.9.243 · AS23470 ReliableSite.Net LLC

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title: Jefferson Systems

Technology

Server: Apache

Registration

Registrar

NameCheap, Inc.

Created

1998-12-19

Expires

2027-03-02 285 days left

Updated

2025-12-03

Name servers

dns1.jeffsys.net
dns2.jeffsys.net

DNS records live

NS

dns1.jeffsys.net
dns2.jeffsys.net

MX

10 mail.jeffsys.net

Email authentication weak

SPF: v=spf1 a mx include:outbound.mailhop.org -all
strict (-all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

E8

from 2026-04-09 to 2026-07-08

Expires in 49 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://www.jeffsys.net/

present

strict-transport-security

findings

missing Content Security Policy
missing frame protection
missing content type protection
missing Referrer Policy
missing Permissions Policy

Header values

strict-transport-security: max-age=63072000; includeSubDomains; preload