invisible-island.net

.net crawl

First seen 2026-04-11 · Last seen 2026-05-20 · ok HTTP/1.1 200 790 ms crawled 2026-05-19

US · 172.234.150.241 · AS63949 Akamai Connected Cloud

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title: Thomas E. Dickey's software development projects
Description: Thomas Dickey develops/maintains widely-used tools and libraries for software development (diffstat, yacc, mawk) and terminals (ncurses, lynx, xterm)
Generator: HTML Tidy for HTML5 for Linux version 5.6.0

Technology

Server: nginx

Social

Contact

Email

dickey@invisible-island.net

Registration

Registrar

Network Solutions, LLC

Created

2001-04-28

Expires

2029-04-28 1073 days left

Updated

2024-02-28

Name servers

ns.his.com
ns2.his.com
ns3.his.com
ns4.his.com

DNS records live

NS

ns.his.com
ns2.his.com
ns3.his.com
ns4.his.com

MX

5 pmg.his.com

Email authentication partial

SPF: v=spf1 include:his.com ~all
softfail (~all)
DMARC: v=DMARC1; p=none; rua=mailto:dmarc.report@his.com; ruf=mailto:dmarc.report@his.com;
policy: none (monitoring only)
DKIM: no key found at common selectors

Certificate (current)

R13

from 2026-04-06 to 2026-07-05

Expires in 46 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://invisible-island.net/

findings

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