hendersonengineers.com

.com crawl

First seen 2026-05-04 · Last seen 2026-05-16 · ok HTTP/1.1 200 9053 ms crawled 2026-05-10

US · 141.193.213.20 · AS209242 Cloudflare London, LLC

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: A Leading Engineering Design Firm | Henderson Engineers
Description: We're a full-service building systems engineering design and facility consulting firm, designing for the life of the building with a holistic approach & strong collaboration.
Language: en-US
Canonical: https://www.hendersonengineers.com/

Open Graph

url: https://www.hendersonengineers.com/
title: A Leading Engineering Design Firm | Henderson Engineers
locale: en_US
site name: Henderson Engineers
description: We're a full-service building systems engineering design and facility consulting firm, designing for the life of the building with a holistic approach & strong collaboration.

Technology

CDN: Cloudflare
CMS: WordPress

Analytics

Google Tag Manager

Social widgets

YouTube Embed

Third-party hosts loaded (11)

maxcdn.bootstrapcdn.com×3
www.google.com×3
www.googletagmanager.com×3
cdn-images.mailchimp.com×1
cdn.jsdelivr.net×1
cloud.typography.com×1
gmpg.org×1
s3.amazonaws.com×1
tools.luckyorange.com×1
www.facebook.com×1
www.youtube.com×1

Social

Contact

Address: St. LouisPhoenixTampaWashington, D.C.Proud to be100% Employee Owned.© 2026

Registration

Registrar

Network Solutions, LLC

Created

2002-09-04

Expires

2027-09-04 471 days left

Updated

2021-06-20

Name servers

ns11.constellix.com
ns21.constellix.com
ns31.constellix.com
ns41.constellix.net
ns51.constellix.net
ns61.constellix.net

DNS records live

NS

ns11.constellix.com
ns21.constellix.com
ns31.constellix.com
ns41.constellix.net
ns51.constellix.net
ns61.constellix.net

MX

5 hendersonengineers-com.mail.protection.outlook.com

TXT

1fv1kbn12ccthvfo48tqfbng83
lovable_verification=nDdFT1extPZDBioXBvKJ
ph09VXSoRfazYrrdHX5aWjeuMCuvBm/kuOQGxHTRpE6DjsSI+7nURJMu899NAY1xDZSd1dcJx61OIYsfNb0/ig==

Verified for

Anthropic
Apple
Cisco
DocuSign
Dropbox
Microsoft 365
Miro

Email authentication partial

SPF

v=spf1 mx ip4:12.163.106.41 include:servers.mcsv.net include:spf.protection.outlook.com include:dayforcehcm.com include:spf.us.exclaimer.net -all

strict (-all)

DMARC

v=DMARC1; p=none; sp=quarantine

policy: none (monitoring only) · sp=quarantine

DKIM

Show 5 DKIM selectors

selector1: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCds8zZ6VFvsLdIRpXBo2noWn/Y15jqvqMSaqvaLR8qvv+73LRTfykaTFIyNWs487/90F6295bnVrJF+9uHjb…
selector2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2s4002TyZYCgLP/+rRTy+v9/mX+usWZwH9VkDE2izLi4DqfzThM4YKZgZfTmTLwGyc4tRyFYWTGbF8…
k1: k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDbNrX2cY/GUKIFx2G/1I00ftdAj713WP9AQ1xir85i89sA2guU0ta4UX1Xzm06XIU6iBP41VwmPwBGRNofhBVR+e6WHUo…
s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAygTCWOsZz9/lYY0DH3tFRy/nSwDyRhSyxyV+Ob5y4SgQPcbSGwkQvpadrYbHw0atkGxjhHY8rzloBHBMm+…
s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC+P2eKBHAlGxdx/7jNawZ+WQOTAdaggcGjH6oxivcg6/NC6KMU/QiLy4YuvEP5lKkKeEvhrR325VCREJA6ADA3R/…

selectors probed

Certificate (current)

from 2026-04-16 to 2026-07-15

Expires in 56 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 80/100 Checked live page: https://www.hendersonengineers.com/

present

strict-transport-security
x-frame-options
x-content-type-options
referrer-policy
permissions-policy

findings

missing Content Security Policy

Header values

referrer-policy: no-referrer-when-downgrade
x-frame-options: SAMEORIGIN
permissions-policy: geolocation=(), midi=(), sync-xhr=(), microphone=(), camera=(), magnetometer=(), gyroscope=(), fullscreen=(self), payment=()
x-content-type-options: nosniff
strict-transport-security: max-age=31536000; includeSubDomains