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Chicago & Chicagoland Business Phone System — 312, 773, 872 and All Suburban Area Codes

Unify your Chicago business communications with a local 312, 773, 872, or any Chicagoland area code — backed by PanTerra Networks' AI-powered Streams.AI platform and a 99.999% uptime SLA built for the demands of Chicago's financial services, healthcare, and enterprise technology buyers.

Going Beyond VoIP with PanTerra

Call Center

Call Center

Unlimited calling, Follow Me/Find Me, Voicemail to Email & Text, and more

Multi-Media Messaging

Multi-Media Messaging

Unlimited storage, SMS/MMS, MS Teams Integration and enterprise-grade security

File Sync & Share

File Sync & Share

HIPAA/HITECH compliance, MF authentication and user access management

Video Conferencing

Video Conferencing

Screenshare, Connect AI video conferencing, Audio/Video transcripts and live captioning

Chicago and Chicagoland Area Codes — Complete Guide

Chicago and the greater Chicagoland metropolitan area are served by eleven active area codes — a reflection of the region's growth from a single Illinois-wide code in 1947 to the third-largest metropolitan statistical area in the United States.

PanTerra Networks can provision a local business phone number in any of these area codes, and can port your existing number with zero service interruption.

Code(s) Introduced Coverage Key Cities / Areas
312 1947 (original) Chicago CBD & near north — Loop, Magnificent Mile, RiverNorth, Streeter ville, Gold Coast, Fulton Market / West Loop La Salle Street financial corridor, Merchandise Mart, Google Chicago HQ, McDonald's Corp HQ
773 November 1996 All Chicago neighborhoods outside the 312 core Wicker Park, Logan Square, Pilsen, Hyde Park, Lincoln Park, Lakeview, Rogers Park, Bridgeport, Beverly
872 October 2009 Overlay for both 312 and 773 — entire Chicago city foot print Active assignment code for new Chicago city lines —all Chicago city addresses
708 / 464 Nov 1989 / overlay South and western Cook County suburbs Oak Park, Cicero, Berwyn, Evergreen Park, Orland Park, Tinley Park, Oak Lawn, Chicago Heights
847 / 224 1996 / 2002 North and northwest suburbs — Lake, northern Cook, Kane counties Evanston, Skokie, Schaumburg, Hoffman Estates, ArlingtonHeights, Palatine, Elgin, Waukegan, North Shore, O'Hare corridor
630 / 331 1996 / 2007 Western suburbs — DuPage County, portions of Will and Kane Naperville, Aurora, Wheaton, Downers Grove, Lombard, Oak Brook, Elmhurst, Lisle, Bolingbrook
815 / 779 original / 2007 Outer northwest metro, Will County, northwest Illinois Joliet, Romeoville, Plainfield, Crest Hill, outer Will County — one of North America's largest logistics concentrations

Note: All Chicagoland area codes are part of the same local calling area — no long-distance charges apply between any of them within the metro. Ten-digit dialing is required throughout Illinois.

PanTerra Networks can provision a local business phone number in any Chicago or Chicagoland area code, and can port your existing number with zero service interruption.

Going Beyond VoIP with PanTerra

Billing Per Location

Cost Effective

Leverage the benefits of lower costs for more features over traditional phone lines and enjoy limited costs for hardware and software

Streams.AI secure team rooms with AES-256 encryption and admin controls icon

Dead Reliable

Stay connected through any outage with 99.999% uptime and automatic call forwarding backed by fully redundant data centers

Regulated Industry Messaging

Scalable

Make confident business decisions with VoIP service that scales with you — whether you're adding or removing lines, you'll only pay for what you actually need

No Self-Provisioning

Mobility & Access

Take advantage of portable technology that allows you and your team to work from home or the office, while easily maintaining access to voice, fax, and data services

Enhanced Communication

Enhanced Communication

Answer calls faster and reduce voicemails with smart routing that rings multiple devices, so you're always reachable on desktop or mobile

30-Second LiveSupport

30-Second Live Support

Experience award-winning customer service, with in-house live support from helpful and personable stateside technicians

Chicago's Commercial Identity — America's Midwestern Capital

Chicago is the third-largest city in the United States and the economic capital of the American Midwest. The Chicago-Naperville-Elgin MSA — spanning 13 Illinois counties, portions of northwest Indiana, and southeast Wisconsin — has a population approaching 10 million.

Financial Services

Chicago is the second-largest U.S. financial center after New York, anchored by CME Group — operator of the world's largest futures exchange — and Cboe Global Markets, the world's largest options exchange. The La Salle Street corridor is the global capital of derivatives and futures trading, home to Northern Trust, BMO Harris Bank, Wintrust Financial, Morningstar, Citadel, DRW, Jump Trading, and IMC. PCI-DSS, SOX, and GLBA compliance are procurement requirements across this buyer ecosystem.

Fortune 500 & Corporate

Chicago's Fortune 500 concentration is among the largest in the United States — United Airlines, Conagra Brands, Kraft Heinz, Exelon, Allstate, and Hyatt Hotels are among the dozens headquartered in the city or Chicagoland. Google's Chicago engineering hub in Fulton Market is one of its largest outside of the Bay Area. McDonald's Corporation relocated its headquarters to the Fulton Market District in 2018.

Legal

Chicago's legal sector is the third-largest in the United States. Kirkland & Ellis — the world's largest law firm by revenue — is headquartered here, alongside Latham & Watkins, Skadden Arps, Jenner & Block, Mayer Brown, Sidley Austin, and Winston & Strawn. For law firms and legal services organizations, the confidentiality and compliance requirements of a unified communications platform are procurement-level considerations.

Healthcare & Pharma

Northwestern Memorial Hospital (top 10 nationally), Advocate Aurora Health, Rush University Medical Center, University of Chicago Medicine, and Lurie Children's Hospital anchor Chicago's healthcare sector. The Lake County pharmaceutical corridor north of the city hosts AbbVie, Baxter International, and Abbott Laboratories — three of the world's largest pharmaceutical and medical device companies. HIPAA and HITECH compliance is a non-negotiable requirement across this entire ecosystem.

Aviation & Logistics

O'Hare International Airport — one of the world's busiest by passenger traffic — anchors a massive aviation, logistics, cargo, and hospitality sector in the northwest Chicago suburbs. The Joliet/Will County logistics corridor, one of North America's largest distribution concentrations, connects Chicago's rail and highway infrastructure to national supply chains.

From the La Salle Street trading floors and Loop law firm towers to the Fulton Market tech district, Magnificent Mile hospitality corridor, Northwestern Memorial Hospital network, AbbVie campus in North Chicago, and Naperville's DuPage corporate parks, PanTerra Networks' Streams.AI platform delivers unified cloud communications for Chicago's most demanding enterprise buyers — with 99.999% uptime and 30-second live US-based support.

PanTerra UCaaS Service Areas in the Chicago Metro

PanTerra Networks provides local business phone service throughout the Chicagoland region. PanTerra's certified local technology partner Oxpecker Technology provides managed IT and hands-on support for small business and clinic deployments in the Chicago city area.

PanTerra serves businesses across Chicago's neighborhoods including The Loop, River North, West Loop, Gold Coast, Lincoln Park, Lakeview, Wicker Park, Pilsen, Bridgeport, Hyde Park, Andersonville, Bucktown, Logan Square, Humboldt Park, and the Near North Side.

PanTerra also serves the greater Chicagoland region including Evanston, Oak Park, Berwyn, Cicero, Skokie, Niles, Des Plaines, Arlington Heights, Schaumburg, Naperville, Aurora, Joliet, Waukegan, Elgin, Bolingbrook, Orland Park, Tinley Park, and Oak Lawn.

Chicago Business Communication Resources

Expert guides for Chicago and Chicagoland businesses on local phone numbers, VoIP, and unified communications.

Frequently Asked Questions

Chicago & Chicagoland Business Phone Numbers

What cities and neighborhoods does the 312 area code cover in Chicago?

Area code 312 covers downtown Chicago and its surrounding neighborhoods, including The Loop, River North, the West Loop, Gold Coast, Near North Side, Fulton Market, and portions of the Near South Side. It is one of the original North American Numbering Plan area codes established in 1947 — at the time it covered all of Illinois. Central office codes for 312 are now heavily allocated, making 312 numbers increasingly premium.

NEW — serves area code informational searchers (312/773 area code queries)

Is 773 a Chicago area code? What areas does it cover?

Yes. Area code 773 covers all Chicago neighborhoods outside the downtown core served by 312. This includes the North Side (Lakeview, Andersonville, Rogers Park, Lincoln Square), the West Side (Logan Square, Humboldt Park, Pilsen), and the South Side (Hyde Park, Bridgeport, Beverly, Chatham). For Chicago businesses outside the Loop, 773 is the primary local area code.

What is the difference between Chicago area codes 312, 773, and 872?

All three area codes serve Chicago city proper. 312 covers the downtown core (Loop, Magnificent Mile, River North, Fulton Market). 773 covers all Chicago neighborhoods outside the 312 core. 872 is an overlay added in 2009 covering the same geographic footprint as both 312 and 773 — it is the active assignment code for most new Chicago city lines.

Does PanTerra serve suburban Chicagoland — Naperville, Schaumburg, Evanston, and the North Shore?

Yes. PanTerra can provision local business phone numbers in all Chicagoland area codes — 312, 773, 872, 708/464, 847/224, 630/331, and 815/779 — covering the entire Chicago MSA from the Loop to Naperville, Schaumburg to the North Shore, and Joliet to Waukegan.

Can I get a 312 area code number for my Chicago business?

PanTerra can port an existing 312 number from your current carrier. If you need a new Chicago city number, PanTerra can provision an 872 number — the active assignment overlay for all Chicago city geographies. Both carry full local credibility in the Chicago market. 312 numbers cannot be newly assigned but can be ported from an existing carrier.

Can I port my existing Chicago area code number to PanTerra?

Yes. PanTerra supports number porting for all Chicago and Chicagoland area codes. Your existing number is preserved with zero service interruption. The porting process typically completes within 7 to 14 business days.

Does PanTerra support HIPAA compliance for Chicago healthcare organizations?

Yes. PanTerra's Streams.AI platform provides full HIPAA and HITECH compliance — required for Northwestern Medicine, Advocate Aurora Health, Rush University Medical Center, AbbVie, Baxter International, Abbott Laboratories, and their vendor ecosystems throughout the Chicago metro.

Does PanTerra integrate with Microsoft Teams and Salesforce?

Yes. Streams.AI for Microsoft Teams enables direct routing integration, and PanTerra integrates with Salesforce, HubSpot, ServiceNow, and a wide range of enterprise CRM and collaboration platforms — critical for Chicago's Fortune 500 enterprise accounts.

Can PanTerra support a business with a Chicago Loop headquarters and suburban campuses in Naperville or Schaumburg?

Yes. PanTerra's Streams.AI platform unifies multi-site organizations on a single cloud communications platform with a shared directory, unified call routing, and one admin portal — ideal for Chicago metro businesses with both city and suburban locations.

What does a Chicago business phone system from PanTerra cost?

PanTerra's Streams.AI Business Plus plan starts at $14.95/user/month for mid-market and enterprise organizations. Build your quote for a customized Chicago quote based on your number of users, locations, and required features.

Explore PanTerra Local Phone Numbers in Nearby Markets

PanTerra provides local business phone numbers and UCaaS service across the United States. Explore other markets:

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