indexo.dev

sifry.com

.com crawl

First seen 2026-06-04 · Last seen 2026-06-04 · ok HTTP/1.1 200 525 ms crawled 2026-06-04

US · 198.49.23.144 · AS53831 Squarespace, Inc.

Reputation 100/100

Classifying

HTML metadata

Title
David Sifry
Language
en-US
Canonical
http://www.sifry.com

Open Graph

url
http://www.sifry.com
title
David Sifry
site name
David Sifry
description
Building Great Organizations Is Art Learn More

Technology

Server
Squarespace
CMS
Squarespace
Fonts
  • Adobe Fonts

Third-party hosts loaded (6)

  • assets.squarespace.com×11
  • definitions.sqspcdn.com×4
  • images.squarespace-cdn.com×3
  • static1.squarespace.com×2
  • use.typekit.net×2
  • p.typekit.net×1

Contact

Phone
Address
6034 Fulton Street San Francisco, CA, 94121 United States

Registration

Registrar
GoDaddy.com, LLC
Created
1996-01-07
Expires
2028-01-06 579 days left
Updated
2025-01-07
Name servers
  • ns19.domaincontrol.com
  • ns20.domaincontrol.com

DNS records live

NS
  • ns19.domaincontrol.com
  • ns20.domaincontrol.com
MX
Show 7 MX records
  • 10 aspmx.l.google.com
  • 20 alt1.aspmx.l.google.com
  • 20 alt2.aspmx.l.google.com
  • 30 aspmx2.googlemail.com
  • 30 aspmx3.googlemail.com
  • 30 aspmx4.googlemail.com
  • 30 aspmx5.googlemail.com

Email authentication strong

SPF
v=spf1 include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1; p=quarantine; rua=mailto:dmarc@sifry.com
policy: quarantine
DKIM
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAjGqQN+xjEJIe2Gvem2Us3ywNlK284WWqc2+mNkNX3e4+oLKItQ9sX5bdsKq07qYBVWqCiPhC3eO4nS…
selectors probed

Certificate (current)

R13
from 2026-04-20 to 2026-07-19
Expires in 43 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 55/100 Checked live page: https://www.sifry.com/

present
  • strict-transport-security
  • x-content-type-options
findings
  • short HSTS max-age
  • missing Content Security Policy
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff
strict-transport-security
max-age=0

Links to (1)

Linked from (1)

Use this data via API

Everything on this page for sifry.com is available as JSON from the indexo.dev REST & MCP API.

curl "https://indexo.dev/api/v1/domains/sifry.com" \
  -H "X-API-Key: idx_..."

Read the docs & get a free key →