The 815 area code is a telephone area code serving most of northern Illinois outside the Quad Cities areas, and includes the Joliet area and some of Chicago’s western and northwestern suburbs. To start a free reverse phone lookup, simply enter the full 10-digit number (including the 815 area code) below and access available caller information such as name, address, and more.
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Phone numbers with this area code originate from most of northern Illinois, excluding the Quad Cities regions. The service area also covers the Joliet vicinity and extends into some of Chicago's western and northwestern suburbs.
Area codes 815 and 779 work together as an overlay complex. Area code 779 was introduced to the same numbering plan area (NPA) in 2009. To accommodate this overlay, all calls within the 815 area required ten-digit dialing, which became mandatory starting February 17, 2007.
Area code 815 is a General Purpose Code which was placed in service on January 1, 1947.
Our reverse phone lookup will analyze the three-digit prefix of any 815 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Illinois geographic region, and local calling area associated with the phone number.
Company | Number of Prefixes |
---|---|
ILLINOIS BELL TEL CO | 149 |
FRONTIER NORTH, INC. - IL | 116 |
LEVEL 3 COMMUNICATIONS, LLC - IL | 44 |
NEW CINGULAR WIRELESS PCS, LLC - IL | 37 |
SPRINT SPECTRUM, L.P. | 35 |
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 33 |
UNITED STATES CELLULAR - IL | 21 |
CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 12 |
T-MOBILE USA, INC. | 12 |
TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 9 |
GALLATIN RIVER COMMUNICATIONS DBA CENTURYLINK | 8 |
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 6 |
AT&T - LOCAL | 5 |
FIRST COMMUNICATIONS, LLC - IL | 5 |
US XCHANGE OF ILLINOIS LLC DBA CHOICE ONE COMM IL | 5 |
XO ILLINOIS, INC. | 5 |
FRONTIER COMMUNICATIONS OF THE CAROLINAS, INC - IL | 4 |
RCN TELECOM SERVICES OF ILLINIOS, INC. - IL | 4 |
AERO NORTH COMMUNICATIONS, INC. - IL | 3 |
AT&T CORP. | 3 |
COMCAST IP PHONE, LLC | 3 |
FRONTIER COMMUNICATIONS OF ILLINOIS, INC. | 3 |
ILLINOIS VALLEY CELLULAR RSA 2-I PARTNERSHIP | 3 |
MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 3 |
BANDWIDTH.COM CLEC, LLC - IL | 2 |
C-R TELEPHONE CO. | 2 |
CHARTER FIBERLINK - ILLINOIS, LLC - IL | 2 |
FRONTIER COMMUNICATIONS-PRAIRIE, INC. | 2 |
METROPCS, INC. | 2 |
TDS METROCOM, INC. - IL | 2 |
DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL | 1 |
FIRST COMMUNICATIONS, LLC | 1 |
FRONTIER COMMUNICATIONS OF DEPUE, INC. | 1 |
LEAF RIVER TELEPHONE CO. | 1 |
MARSEILLES TEL. CO. OF MARSEILLES | 1 |
MCLEODUSA TELECOMMUNICATION SERVICES, INC. - IL | 1 |
MCNABB TEL. CO. | 1 |
NUSO, LLC | 1 |
ONVOY, LLC | 1 |
OVATION COMMUNICATIONS OF ILLINOIS, INC. | 1 |
PAETEC COMMUNICATIONS, INC. - IL | 1 |
PEERLESS NETWORK OF ILLINOIS, LLC - IL | 1 |
STELLE TEL. CO. | 1 |
TONICA TEL. CO. | 1 |
YMAX COMMUNICATIONS CORP. - IL | 1 |
Rate Center | Number of Prefixes |
---|---|
ROCKFORD | 78 |
JOLIET | 58 |
KANKAKEE | 26 |
WOODSTOCK | 23 |
DE KALB | 19 |
FREEPORT | 15 |
STERLING | 15 |
CRYSTAL LK | 14 |
MCHENRY | 13 |
LOCKPORT | 12 |
PLAINFIELD | 12 |
LA SALLE | 8 |
MORRIS | 8 |
DIXON | 7 |
NEW LENOX | 7 |
PRINCETON | 7 |
MINOOKA | 6 |
OGLESBY | 6 |
BELVIDERE | 5 |
FRANKFORT | 5 |
OTTAWA | 5 |
STREATOR | 5 |
SYCAMORE | 5 |
GALENA | 4 |
MOMENCE | 4 |
COAL CITY | 3 |
GARDNER | 3 |
MENDOTA | 3 |
NEWMILFORD | 3 |
PONTIAC | 3 |
ROCHELLE | 3 |
WATSEKA | 3 |
ASHTON | 2 |
CHERRY VLY | 2 |
CLIFTON | 2 |
CRESCENTCY | 2 |
DWIGHT | 2 |
ELWOOD | 2 |
HARVARD | 2 |
HERSCHER | 2 |
LA GRANGE | 2 |
MANHATTAN | 2 |
MANTENO | 2 |
MARENGO | 2 |
MILLEDGEVL | 2 |
OREGON | 2 |
RICHMOND | 2 |
ROSCOE | 2 |
SANDWICH | 2 |
SENECA | 2 |
SO BELOIT | 2 |
SPRING VLY | 2 |
ST ANNE | 2 |
WILMINGTON | 2 |
WONDERLAKE | 2 |
AMBOY | 1 |
APPLERIVER | 1 |
ASHKUM | 1 |
BRAIDWOOD | 1 |
BUREAU | 1 |
BYRON | 1 |
CAPRON | 1 |
CEDARVILLE | 1 |
CHADWICK | 1 |
CHATSWORTH | 1 |
CHEBANSE | 1 |
CHENOA | 1 |
CISSNAPARK | 1 |
COLETA | 1 |
CORNELL | 1 |
CRESTON | 1 |
CULLOM | 1 |
DAKOTA | 1 |
DANFORTH | 1 |
DAVIS | 1 |
DEPUE | 1 |
DONOVAN | 1 |
DOVER | 1 |
DURAND | 1 |
E DUBUQUE | 1 |
EARLVILLE | 1 |
ELIZABETH | 1 |
FAIRBURY | 1 |
FLANAGAN | 1 |
FORREST | 1 |
FORRESTON | 1 |
FRANKLIGRV | 1 |
FULTON | 1 |
GENOA | 1 |
GERMAN VLY | 1 |
GILMAN | 1 |
GRANDDTOUR | 1 |
GRANDRIDGE | 1 |
GRANT PARK | 1 |
GRANVILLE | 1 |
GRAYMONT | 1 |
HANOVER | 1 |
HARDING | 1 |
HEBRON | 1 |
HENNEPIN | 1 |
HINCKLEY | 1 |
KEMPTON | 1 |
KIRKLAND | 1 |
LA MOILLE | 1 |
LADD | 1 |
LANARK | 1 |
LEAF RIVER | 1 |
LELAND | 1 |
LENA | 1 |
LISBON | 1 |
LOSTANT | 1 |
LYNDON | 1 |
MALTA | 1 |
MANLIUS | 1 |
MAPLE PARK | 1 |
MARSEILLES | 1 |
MARTINTON | 1 |
MASSBACH | 1 |
MAZON | 1 |
MCNABB | 1 |
MILFORD | 1 |
MONROE CTR | 1 |
MORRISON | 1 |
MT CARROLL | 1 |
MT MORRIS | 1 |
NELSON | 1 |
NEWARK | 1 |
ODELL | 1 |
OHIO | 1 |
ONARGA | 1 |
ORANGEVL | 1 |
PAW PAW | 1 |
PEARL CITY | 1 |
PECATONICA | 1 |
PIPER CITY | 1 |
PLATTVILLE | 1 |
POLO | 1 |
POPLAR GRV | 1 |
PROPHETSTN | 1 |
PUTNAM | 1 |
RANSOM | 1 |
REDDICK | 1 |
ROCK CUT | 1 |
ROCKTON | 1 |
RUTLAND | 1 |
SAUNEMIN | 1 |
SAVANNA | 1 |
SCALESMOND | 1 |
SEWARD | 1 |
SHABBONA | 1 |
SHANNON | 1 |
SHEFFIELD | 1 |
SHELDON | 1 |
SHERIDAN | 1 |
SHIRLAND | 1 |
SOMONAUK | 1 |
SPRING GRV | 1 |
STELLE | 1 |
STEWARD | 1 |
STILMANVLY | 1 |
STOCKTON | 1 |
TAMPICO | 1 |
THOMSON | 1 |
TISKILWA | 1 |
TOLUCA | 1 |
TONICA | 1 |
UNION | 1 |
UTICA | 1 |
WALNUT | 1 |
WARREN | 1 |
WATERMAN | 1 |
WENONA | 1 |
WINNEBAGO | 1 |
WINSLOW | 1 |
WOODLAND | 1 |
WYANET | 1 |
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