indexo.dev

colf.dev

.dev crawl

First seen 2026-05-08 · Last seen 2026-05-08 · ok HTTP/1.1 200 1156 ms crawled 2026-05-15

US · 64.239.109.1 · AS16509 Amazon.com, Inc.

Reputation 100/100

Classifying

HTML metadata

Title
Colf
Description
Prompt solutions to algorithmic problems with the fewest tokens.
Language
en

Open Graph

title
Colf
description
Prompt solutions to algorithmic problems with the fewest tokens.

Technology

CDN
Vercel
CMS
Next.js

Third-party hosts loaded (1)

  • avatars.githubusercontent.com×198

Social

DNS records live

NS
  • curitiba.ns.porkbun.com
  • fortaleza.ns.porkbun.com
  • maceio.ns.porkbun.com
  • salvador.ns.porkbun.com

Email authentication no MX

SPF
not published
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-15 to 2026-07-14
Expires in 54 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://colf.dev/

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

Links to (2)

Linked from (1)