Active Prefixes in Area Code 815
| Prefix | Primary City | Phone Type | Company |
|---|---|---|---|
| 815-322-#### | McHenry | Landline Numbers | Level 3 Communicatio... |
| 815-323-#### | Belvidere | Landline Numbers | Level 3 Communicatio... |
| 815-324-#### | Ottawa | Landline Numbers | Mediacom Telephony O... |
| 815-325-#### | Joliet | Wireless Numbers | New Cingular Wireles... |
| 815-326-#### | Oglesby | Wireless Numbers | New Cingular Wireles... |
| 815-327-#### | Plainfield | Landline Numbers | Broadwing Communicat... |
| 815-328-#### | Lockport | Landline Numbers | Broadwing Communicat... |
| 815-329-#### | Rockford | Landline Numbers | Sbc Internet Service... |
| 815-330-#### | Crescent City | Landline Numbers | Globalcom, Inc.-il... |
| 815-331-#### | McHenry | Landline Numbers | Broadwing Communicat... |
| 815-332-#### | Cherry Valley | Landline Numbers | Frontier North, Inc.... |
| 815-333-#### | Woodstock | Landline Numbers | Broadwing Communicat... |
| 815-334-#### | Woodstock | Landline Numbers | Ameritech Illinois... |
| 815-335-#### | Winnebago | Landline Numbers | Frontier North, Inc.... |
| 815-336-#### | Milledgeville | Landline Numbers | Citizens Telecom Co ... |
| 815-337-#### | Woodstock | Landline Numbers | Ameritech Illinois... |
| 815-338-#### | Woodstock | Landline Numbers | Ameritech Illinois... |
| 815-339-#### | Granville | Landline Numbers | Frontier North, Inc.... |
| 815-340-#### | La Moille | Landline Numbers | Comcast Phone Of Ill... |
| 815-341-#### | Joliet | Wireless Numbers | New Cingular Wireles... |
| 815-342-#### | Joliet | Wireless Numbers | New Cingular Wireles... |
| 815-343-#### | Oglesby | Wireless Numbers | New Cingular Wireles... |
| 815-344-#### | McHenry | Landline Numbers | Ameritech Illinois... |
| 815-345-#### | Woodstock | Landline Numbers | Level 3 Communicatio... |
| 815-346-#### | Gardner | Landline Numbers | Broadwing Communicat... |
| 815-347-#### | Woodstock | Wireless Numbers | Cellco Partnership D... |
| 815-348-#### | Kankakee | Landline Numbers | Us Xchange Of Illino... |
| 815-349-#### | McHenry | Landline Numbers | Xo Illinois, Inc.... |
| 815-350-#### | Franklin Grove | Landline Numbers | Essex Telcom, Inc.... |
| 815-351-#### | Kankakee | Wireless Numbers | Cellco Partnership D... |
Area Code 815 Introduction
| Area Code: | 815 |
| Country: | United States |
| State/Province: | Illinois - IL |
| Major City: | Rockford |
| Time Zone: | Central |
| Average property | $43.4K |
| Average age | 56 y/o |
| Average assets | $43.1K |
| Population density | 57,914 sq mi (149,932 km2) |
| Population | 12,801,539 |
| latitude Longitude: | |
| 36° 58′ N to 42° 30′ N / 87° 30′ W to 91° 31′ W | |
| About 815 : | |
| The 815 Area Code (or Area Code 815) is located in the state of IL. Area Code 815 is one of the 269 3-digit telephone area codes in the USA. It covers roughly 2.27 million unique phone numbers and 7.92 million individuals near the city of La Salle Area code 815 was put into service. In 1957 area code 815 was split, along with a portion of area code 217, to form area code 309. In 2007 area code 815 was overlaid with area code 779. |
|
| Major cities or places | |
| Crystal Lake, IL>De Kalb, IL>Freeport, IL>Joliet, IL>Kankakee, IL>Loves Park, IL>Machesney Park, IL>Mchenry, IL>Rockford, IL>Romeoville, IL>Woodstock, IL | |