RCN TELECOM SERVICES OF ILLINOIS, LLC
ActiveLimited Business License · Chicago / Cook County, IL
At a glance
Public records place RCN TELECOM SERVICES OF ILLINOIS, LLC at 3 active locations in 3 Chicago office buildings. Locations include 600 S FEDERAL ST; 600 W CHICAGO AVE; 350 N ORLEANS ST.
Public record — Chicago / Cook County
Office locations (3 active)
| Building | Suite / floor | Submarket | Since | Source | Match |
|---|---|---|---|---|---|
| 600 S FEDERAL ST | — | Chicago | May 2008 | Chicago business licence | address match · high |
| 600 W CHICAGO AVE | — | Chicago | Apr 2003 | Chicago business licence | address · medium |
| 350 N ORLEANS ST | — | Chicago | Apr 2003 | Chicago business licence | address match · high |
Where does RCN TELECOM SERVICES OF ILLINOIS, LLC operate in Chicago?
The earliest active record dates from Apr 2003 and the most recent from May 2008.
Across Chicago, 4,834 active business locations are matched to office buildings; RCN TELECOM SERVICES OF ILLINOIS, LLC accounts for 3 of them.
How does BuildingCensus know RCN TELECOM SERVICES OF ILLINOIS, LLC is at these addresses?
Each location is a business record whose premises address was matched to a county office parcel (record types on this page: Chicago business licence). The match method and confidence are shown on every row.
A record at an address is evidence that the business operates there, not a lease: records lag moves by months, and businesses without a local record at an address do not appear.
Frequently asked questions
Where are RCN TELECOM SERVICES OF ILLINOIS, LLC's offices in Chicago?
Public records place RCN TELECOM SERVICES OF ILLINOIS, LLC at 3 active locations in Chicago / Cook County: 600 S FEDERAL ST; 600 W CHICAGO AVE; 350 N ORLEANS ST.
How long has RCN TELECOM SERVICES OF ILLINOIS, LLC been at its Chicago locations?
The earliest active record starts Apr 2003; the newest May 2008. Start dates are when the record was opened, which can trail the actual move-in.
Related
Data provenance — public records only
- Chicago / Cook County — Cook County Assessor parcel, commercial-valuation and sales datasets (owner names, mailing addresses, priced sales with buyer and seller); City of Chicago active business licences for occupancy. Licence addresses are street-level, and state-licensed professions are absent from the city roll.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
Dataset updated . Locations from Chicago / Cook County business records matched to county office parcels.
About this data
Source: Cook County Assessor parcel, commercial-valuation and sales datasets (Chicago / Cook County), as published October 7, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “RCN TELECOM SERVICES OF ILLINOIS, LLC — Chicago office locations”, https://buildingcensus.com/offices/chicago/companies/rcn-telecom-services-of-illinois-llc (data as of October 7, 2026).