Authority Industries Listings

The Authority Industries directory organizes verified service providers across the United States into structured, searchable listings that allow businesses and property owners to locate qualified contractors by trade, geography, and service type. Each entry is built from public business registration data, licensing records, and trade category classifications rather than self-reported marketing claims. Understanding how these listings are assembled — and what they explicitly exclude — is essential to using this resource accurately. For broader context on why this directory exists and how it fits within the larger reference structure, see the Authority Industries Directory Purpose and Scope page.

Geographic distribution

Listings span all 50 U.S. states, with entry density reflecting actual contractor licensing activity in each jurisdiction rather than any editorial preference. States with mandatory contractor licensing registries — such as California (Contractors State License Board), Florida (Department of Business and Professional Regulation), and Texas (Department of Licensing and Regulation) — contribute disproportionately to total entry volume because their public licensing databases are machine-readable and updated on defined cycles.

Geographic clustering is measurable: metropolitan statistical areas with populations above 1 million account for approximately 60 percent of all active contractor licenses in the United States, a distribution pattern the directory reflects directly. Rural counties in states without mandatory registration (Montana, Wyoming, and Alaska, for example) have correspondingly thinner coverage, and entries there carry explicit coverage-gap notations.

The directory segments listings into 4 regional tiers — Northeast, South, Midwest, and West — aligned with U.S. Census Bureau division boundaries. Within each region, listings are further sorted by state, county FIPS code, and primary trade classification. This layered structure allows filtering from national scope down to a specific county without the ambiguity that city-name searches introduce when multiple municipalities share the same name across state lines.

How to read an entry

Each listing follows a standardized 7-field format:

1. Business legal name — The name as registered with the relevant state authority, not a trade name or DBA unless the DBA is the registered entity.
2. Primary trade category — Drawn from the North American Industry Classification System (NAICS) 6-digit codes; NAICS 238 series covers specialty trade contractors.
3. License number and issuing authority — Links where possible to the issuing state agency's public verification portal.
4. Service area declaration — Counties or ZIP code ranges self-reported by the contractor in their licensing application; not independently verified by this directory.
5. Verification tier — A 3-level status indicator (Confirmed, Pending, Unverified) described in detail in the Verification Status section below.
6. Last data refresh date — The date the source record was last pulled from the originating public database.
7. Coverage notes — Flags for known data gaps, expired licenses, or multi-state operating agreements.

Trade name versus legal name creates one of the most common reading errors. A contractor operating as "Metro Plumbing Solutions" may be registered as "J. Hartwell LLC" — both names appear in the entry when both are recorded in the source data. The legal name controls for verification purposes. For additional guidance on navigating entry fields, the How to Use This Authority Industries Resource page provides worked examples.

What listings include and exclude

Listings include:

• Active license holders whose registrations appear in a publicly accessible state or municipal licensing database as of the last data refresh
• Sole proprietors operating under a state-registered trade license, provided the license category maps to a covered NAICS code
• Multi-location businesses, with each physical operating address listed as a discrete sub-entry linked to the parent entity record
• Contractors holding reciprocal licenses in 2 or more states, flagged with a multi-jurisdiction indicator

Listings exclude:

• Unlicensed tradespeople, regardless of skill level or years in operation — the directory makes no assessment of competence for contractors without a public license record
• General handyman services that do not carry a specialty trade license
• Manufacturers and material suppliers, even when they perform installation work as a secondary service
• Contractors whose licenses have lapsed within the past 90 days but have not yet been removed from the state's active roster

The clearest contrast is between licensed specialty contractors (included) and general maintenance companies (excluded). A licensed electrician performing panel upgrades is in scope under NAICS 238210. A general property maintenance firm that changes outlets as an incidental task, without a dedicated electrical license, falls outside the directory's scope regardless of how the firm markets itself.

Insurance status is explicitly not captured. Whether a listed contractor carries general liability insurance or workers' compensation coverage is a matter for direct verification with the contractor and the relevant state insurance bureau — it is outside the data the directory collects.

Verification status

The 3-tier verification system distinguishes how each entry's data was sourced and how recently it was confirmed against the originating public record:

• Confirmed — The license number was validated against the issuing authority's live public API or downloadable registry within the past 180 days. This is the highest reliability indicator available in the directory.
• Pending — The entry exists in the source dataset but has not completed a cross-check cycle in the past 181 to 365 days. The license may still be valid; the data simply has not been refreshed.
• Unverified — The entry was added from a historical or batch-import source and has not been matched to a current public record. These entries remain visible to preserve data continuity but should be treated with caution.

No entry carries a verification status that implies endorsement of the contractor's workmanship, pricing, or business practices. The directory verifies licensure records — a single, bounded administrative fact. For the conceptual framework governing what this resource does and does not represent, the Authority Industries Topic Context page provides the necessary background.