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Blog cluster · 64 articles

DialPhone Area codes guides

US and Canadian area code guides — coverage, cities, overlays, time zones, and how to get a local number in any market.

Every US and Canadian phone number carries a three-digit area code (the NPA in North American Numbering Plan terms) that signals where a business is, or wants to appear to be. This cluster covers what each major area code covers, why some cities carry several codes through overlays, and how to claim a local presence in a market without an office there.

Read these if you are choosing a local number for a new market, deciding between an original code and its overlay, or explaining to a team why a familiar city suddenly issues an unfamiliar code.

Cluster

Area codes

Articles

64

Reading

502m

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Articles in this cluster

Featured

Area Code for Jacksonville, Florida: 904 & 324

Jacksonville, Florida's area code is 904, with 324 assigned as the overlay. Learn the neighborhoods 904 covers, the time zone, and how to get a local number.

7 min read · Published June 2026

Methodology

How we research this cluster

Area code coverage, established dates, overlays, and served cities are verified against the North American Numbering Plan Administrator (NANPA) records and localcallingguide.com prefix data. Facts are dataset-grounded rather than generated, and city and time-zone claims are checked against the same source before publishing.

Most articles in the area codes cluster get re-verified every 90 days against current vendor pricing pages, product documentation, and primary regulatory sources. Where a vendor changes pricing or feature scope between verification windows, the affected article is flagged in our editorial dashboard for immediate update. Last-modified dates on every article reflect the most recent verified-as-of date, not the original publication date. The full corrections log is summarized in the editorial standards page.

Cross-cluster reading: the business phone cluster covers fundamentals around cloud PBX migration, number porting, and AI-era voice features; the contact center cluster covers omnichannel routing, agent assist, and CCaaS evaluation; the UCaaS cluster covers platform strategy and migration playbooks; and the industry solutions cluster covers vertical-specific deployments. The communications glossary defines the terminology referenced across every cluster, and the open VoIP Pricing Research 2026 report grounds the pricing benchmarks.

Factual corrections: support@dialphone.com with the article URL and the specific claim. Errors get corrected publicly with visible last-updated dates and a brief change note in the article body where the original copy was material to the reader's decision.

FAQ: area codes

How do I get a phone number with a specific area code?

With a cloud phone provider you pick the area code when you claim the number — no office in that city required. Browse the area code you want, choose an available number, and set your routing. DialPhone offers local numbers in any US or Canadian area code plus toll-free options, and porting an existing number is free.

Why does one city have more than one area code?

When a metro runs low on available numbers, regulators add an overlay: a second area code covering the exact same geography. New York uses 212, 646, and 332; Chicago uses 312 and 872. Any code in an overlay is fully local to that market — the original often carries slightly more "established" weight, while newer overlay codes are easier to obtain.

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