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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.
Oxpecker Technology is a certified PanTerra Networks technology partner serving businesses throughout the Chicago city area and Chicagoland region. With 150+ clients and 15+ years of combined expertise, Oxpecker Technology provides managed IT services, network solutions, cybersecurity, cloud migration, data backup and disaster recovery, and smart building systems — delivering hands-on technical support for professional offices, healthcare clinics, and small businesses across the Chicago metro.
Oxpecker Technology serves businesses across the 312, 773, and 872 area codes — including Chicago's neighborhoods and the greater Chicagoland region. From managed IT and cybersecurity to cloud migration and network infrastructure, Oxpecker Technology handles the full deployment and ongoing support for PanTerra's Streams.AI UCaaS platform at every Chicago-area PanTerra site.
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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.
Leverage the benefits of lower costs for more features over traditional phone lines and enjoy limited costs for hardware and software
Stay connected through any outage with 99.999% uptime and automatic call forwarding backed by fully redundant data centers
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Answer calls faster and reduce voicemails with smart routing that rings multiple devices, so you're always reachable on desktop or mobile
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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.
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.
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.
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.
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.
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.
Area code 312 is one of Chicago's most recognized civic symbols — the phone number equivalent of the Willis Tower or the Chicago River.
312 was established in 1947 as one of the original 86 North American area codes, and at the time it covered the entire state of Illinois. Over nearly 80 years of continuous service, 312 became synonymous with Chicago city presence. 'The 312' appears in restaurant names, hotel brands, music, social media handles, and civic marketing as shorthand for authentic Chicago identity.
For Chicago's Loop-based law firms, financial services companies, trading firms, and corporate headquarters, a 312 number signals genuine city-core presence. Clients, counterparties, regulators, and institutional contacts recognize 312 instantly as a Chicago CBD number. This matters especially in financial services, where the distinction between a Loop-based firm and a suburban operation carries commercial weight.
Because 312 central office codes are heavily allocated, a 312 number is increasingly premium and can only be obtained by porting from an existing holder. PanTerra can port your existing 312 number to our platform with zero service interruption, so you never risk losing it in a carrier transition.
773 numbers carry equal authenticity for Chicago neighborhood-based businesses — from Wicker Park creative agencies and Hyde Park research organizations to Rogers Park nonprofits and Pilsen small businesses. Both 312 and 773 are recognized as genuine Chicago city numbers.
For businesses that need a new Chicago city number, PanTerra can provision a local 872 number — the active assignment overlay for the entire city footprint. For suburban Chicagoland operations, PanTerra can provision 630, 708, 847, or any other metro area code. All numbers are managed on a single unified Streams.AI platform.
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.
Used by businesses of all sizes for over 20 years.
Expert guides for Chicago and Chicagoland businesses on local phone numbers, VoIP, and unified communications.
Chicago & Chicagoland Business Phone Numbers
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)
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.
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.
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.
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.
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.
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.
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.
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.
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.
PanTerra provides local business phone numbers and UCaaS service across the United States. Explore other markets:
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