firstco.com

.com crawl

First seen 2026-04-23 · Last seen 2026-05-17 · ok HTTP/1.1 200 3935 ms crawled 2026-05-17

US · 141.193.213.20 · AS209242 Cloudflare London, LLC

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title

First Co. | HVAC Manufacturer | Dallas, Texas

Description

First Co., an HVAC manufacturer in Dallas, specializes in innovative heating and cooling systems for residential, multi-occupant, and commercial applications.

Language

en-US

Generator

Site Kit by Google 1.177.0

Canonical

https://firstco.com/

Feeds

First Co. » Feed RSS
First Co. » Comments Feed RSS

Open Graph

url: https://firstco.com/
title: First Co. | HVAC Manufacturer | Dallas, Texas
locale: en_US
site name: First Co.
description: First Co., an HVAC manufacturer in Dallas, specializes in innovative heating and cooling systems for residential, multi-occupant, and commercial applications.

Technology

CDN: Cloudflare
CMS: WordPress

Analytics

Google Tag Manager

Third-party hosts loaded (4)

assets.calendly.com×3
www.googletagmanager.com×2
gmpg.org×1
www.google.com×1

Social

Contact

Phone

2143885751

Registration

Registrar

Network Solutions, LLC

Created

1996-11-19

Expires

2030-11-18 1643 days left

Updated

2026-01-09

Name servers

ns53.worldnic.com
ns54.worldnic.com

DNS records live

NS

ns53.worldnic.com
ns54.worldnic.com

MX

10 d258425a.ess.barracudanetworks.com
20 d258425b.ess.barracudanetworks.com

TXT

Show 7 TXT records

brevo-code:7566ceb91341e4bc8867f56e0764e238
5pkmj8pvsva5thacbvabsvvlic
6341phnmk40n6dddamn16euiag
5pkmj8pva5thacbvabsvvlic
s75og02lhpm59tcc91p1gd0c08
MS=ms59163664
anthropic-domain-verification-axtn5r=gq8ddZtAs09heccZZYDWUSSu7

Email authentication strong

SPF

v=spf1 a mx ip4:209.39.20.0/24 include:spf.mandrillapp.com ~all

softfail (~all)

DMARC

v=DMARC1; p=reject; rua=mailto:administrator@firstco.com

policy: reject (enforced)

DKIM

k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…
mail: k=rsa;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDeMVIzrCa3T14JsNY0IRv5/2V1/v2itlviLQBwXsa7shBD6TrBkswsFUToPyMRWC9tbR/5ey0nRBH0ZVxp+lsmTxid2Y2z…

selectors probed

Certificate (current)

WE1

from 2026-03-23 to 2026-06-22

Expires in 33 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://firstco.com/

findings

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

Links to (7)

Linked from (1)

howind.com×2