NPA


An NPA is a Numbering Plan Area. The first digit of an NPA indicates the general geographic region of the number, with the second and third digits indicating more specific areas within that region. The fourth and fifth digits indicate the specific exchange within that area. NPAs are used to route calls to their proper destination and are often referred to as area codes.

NPAs were originally assigned by AT&T in 1947 when direct distance dialing was first introduced in the United States. At that time, there were 86 NPAs in use. Today, there are nearly 300 NPAs in use across the country. Each NPA is made up of a certain number of exchanges, which are groups of five-digit numbers prefixed by 1-5 or 0 (for example 555-1234).

The vast majority of telephone numbers in service today have 10 digits: a three-digit area code followed by a seven-digit local number (1+NPA+NXX). However, some parts of the country still use seven-digit dialing for local calls (1+NXX), while other areas have implemented 11-digit dialing for all calls (1+area code+7DLC).



- SolveForce -

🗂️ Quick Links

Home

Fiber Lookup Tool

Suppliers

Services

Technology

Quote Request

Contact

🌐 Solutions by Sector

Communications & Connectivity

Information Technology (IT)

Industry 4.0 & Automation

Cross-Industry Enabling Technologies

🛠️ Our Services

Managed IT Services

Cloud Services

Cybersecurity Solutions

Unified Communications (UCaaS)

Internet of Things (IoT)

🔍 Technology Solutions

Cloud Computing

AI & Machine Learning

Edge Computing

Blockchain

VR/AR Solutions

💼 Industries Served

Healthcare

Finance & Insurance

Manufacturing

Education

Retail & Consumer Goods

Energy & Utilities

🌍 Worldwide Coverage

North America

South America

Europe

Asia

Africa

Australia

Oceania

📚 Resources

Blog & Articles

Case Studies

Industry Reports

Whitepapers

FAQs

🤝 Partnerships & Affiliations

Industry Partners

Technology Partners

Affiliations

Awards & Certifications

📄 Legal & Privacy

Privacy Policy

Terms of Service

Cookie Policy

Accessibility

Site Map


📞 Contact SolveForce
Toll-Free: 888-765-8301
Email: support@solveforce.com

Follow Us: LinkedIn | Twitter/X | Facebook | YouTube

Newsletter Signup: Subscribe Here