Comfort Systems USA comfortsystemsusa.com Partial data, full scan by Oct 27
Fortune 500 rank #440 · Industrials · Engineering & Construction · FIX
Last scanned 2026-10-19 · next scan Tue, Oct 27
Full DNS records & evidence → NS, MX, mail and SPF senders, verification vendors, certificate authorities, CNAME chains, ASNs and history per hostname
AI vendors verified: Anthropic · OpenAI
DNS
DNS, traffic-weighted: Comfort Systems USA
DNS by hostname count: Comfort Systems USA
Zones (1)
Each DNS zone that holds a scanned hostname: the domain apex, brand domains and any delegated subdomain. Two vendors on one zone = secondary DNS.
| Zone | DNS provider | Nameservers | Hostnames | Key |
|---|---|---|---|---|
| comfortsystemsusa.com primary | Azure DNS | ns1-07.azure-dns.com ns2-07.azure-dns.net ns3-07.azure-dns.org ns4-07.azure-dns.info | 2 | 0 |
CDN & Security
CDN & Security, traffic-weighted: Comfort Systems USA
CDN & security by hostname count: Comfort Systems USA
Hostname map
The live hostnames from the table below, grouped by the provider in front of it and the network (ASN and BGP prefix) its address belongs to. Colored borders mark roles: primary site login / account store developer / API marketing / support / downloads.
Key hostnames by role (CDN & security)
- primary site: Google Cloud
- login / SSO: none found
- account: none found
- store / checkout: none found
- marketing / brand: none found
- support / help: none found
- developer / API: none found
- downloads / static: none found
Hostnames (2)
Found through brand research, browser traffic data (Chrome UX Report) and certificate logs. Tiers: primary = comfortsystemsusa.com and www; key = customer-facing or revenue names (login, account, store, marketing/brand, support, developer, downloads) on any owned domain; other = remaining public names (low weight); internal = staff-only names, not listed here and not counted in share. "CDN & Security" is the CDN, WAF or cloud load balancer a visitor connects to first. Grey rows did not resolve. Weight = share of the company's traffic-weighted total.
| Hostname | Tier / role | DNS | CDN & security | CDN & security evidence | CNAME / IP · ASN | Weight |
|---|---|---|---|---|---|---|
| comfortsystemsusa.com | primary primary site primary site · CDN & security Google Cloud · DNS Azure DNS · 50.0% |
Azure DNS | Google Cloud | Direct (Google Cloud) (A 34.174.38.32 in published gcp ranges) NGINX (weak) (seen in the HTTP response) | 34.174.38.32 AS396982 · 34.174.0.0/17 | 50.0% |
| www.comfortsystemsusa.com | primary primary site primary site · CDN & security Google Cloud · DNS Azure DNS · 50.0% |
Azure DNS | Google Cloud | Direct (Google Cloud) (A 34.174.38.32 in published gcp ranges) NGINX (weak) (seen in the HTTP response) | comfortsystemsusa.com AS396982 · 34.174.0.0/17 | 50.0% |
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History
Trend charts start once two weeks of history build up.
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