Area Code 815 Reverse Phone Lookup

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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IllinoisIllinois Reverse Lookup ➜

Area Code 815 Location: Illinois

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.

Major Cities in the 815 Service Area:

Other Cities and Towns:

  • Adeline
  • Amboy
  • Andres
  • Apple River
  • Argyle
  • Aroma Park
  • Ashkum
  • Ashton
  • Baileyville
  • Ballou
  • Belvidere
  • Bonfield
  • Bourbonnais
  • Braceville
  • Bradley
  • Braidwood
  • Brush Point
  • Buckingham
  • Buffalo Grove
  • Bull Valley
  • Byron
  • Caledonia
  • Capron
  • Carbon Hill
  • Cedar Point
  • Cedarville
  • Chadwick
  • Chana
  • Channahon
  • Cherry Valley
  • Clifton
  • Coal City
  • Coleta
  • Coltonville
  • Compton
  • Coral
  • Cortland
  • Crest Hill
  • Creston
  • Crystal Lake
  • Crystal Lawns
  • Dakota
  • Dana
  • Danforth
  • Davis
  • Davis Junction
  • Daysville
  • Deer Grove
  • DeKalb
  • Diamond
  • Dixon
  • Durand
  • Dwight
  • Earlville
  • East Brooklyn
  • East Dubuque
  • Egan
  • Eleroy
  • Elizabeth
  • Elwood
  • Esmond
  • Essex
  • Fairdale
  • Fairmont
  • Flagg Center
  • Forreston
  • Frankfort
  • Frankfort Square
  • Franklin Grove
  • Freeport
  • Fulton
  • Galena
  • Garden Prairie
  • Gardner
  • Genoa
  • German Valley
  • Gilman
  • Godley
  • Grand Detour
  • Grand Ridge
  • Grant Park
  • Granville
  • Greenwood
  • Haldane
  • Hanover
  • Harmon
  • Harrison
  • Harvard
  • Hebron
  • Herscher
  • Hillcrest
  • Hinckley
  • Holiday Hills
  • Homer Glen
  • Hopkins Park
  • Ingalls Park
  • Irwin
  • Johnsburg
  • Kangley
  • Kent
  • Kings
  • Kingston
  • Kinsman
  • Kirkland
  • Lake Holiday
  • Lake Summerset
  • Lakemoor
  • Lakewood
  • Lakewood Shores
  • Lanark
  • LaSalle
  • Leaf River
  • Lee
  • Leland
  • Lena
  • Leonore
  • Lindenwood
  • Lisbon
  • Lockport
  • Lostant
  • Loves Park
  • Lyndon
  • Machesney Park
  • Malta
  • Manhattan
  • Manteno
  • Maple Park
  • Marengo
  • Marseilles
  • Mazon
  • McCullom Lake
  • McHenry
  • Mendota
  • Menominee
  • Meriden
  • Millbrook
  • Milledgeville
  • Millington
  • Minooka
  • Mokena
  • Momence
  • Monee
  • Monroe Center
  • Morris
  • Morrison
  • Mount Carroll
  • Mount Morris
  • Naplate
  • Nelson
  • New Lenox
  • New Milford
  • Newark
  • Nora
  • North Utica
  • Norway
  • Odell
  • Oglesby
  • Onarga
  • Oneco
  • Orangeville
  • Oregon
  • Ottawa
  • Paw Paw
  • Paynes Point
  • Pearl City
  • Pecatonica
  • Peotone
  • Peru
  • Plainfield
  • Polo
  • Pontiac
  • Poplar Grove
  • Prairie Grove
  • Preston Heights
  • Princeton
  • Prophetstown
  • Ransom
  • Reddick
  • Richmond
  • Ridott
  • Ringwood
  • Ritchie
  • Rochelle
  • Rock City
  • Rock Falls
  • Rockdale
  • Rockton
  • Rodden
  • Romeoville
  • Roscoe
  • Rutland
  • St. Anne
  • Sandwich
  • Savanna
  • Scales Mound
  • Seneca
  • Serena
  • Seward
  • Shabbona
  • Shannon
  • Sheridan
  • Shirland
  • Shorewood
  • Somonauk
  • South Beloit
  • South Wilmington
  • Spring Grove
  • Spring Valley
  • Sterling
  • Steward
  • Stillman Valley
  • Stockton
  • Streator
  • Sublette
  • Sun River Terrace
  • Sycamore
  • Symerton
  • Tampico
  • Thomson
  • Timberlane
  • Toluca
  • Tonica
  • Triumph
  • Troy Grove
  • Union
  • Union Hill
  • Verona
  • Waddams Grove
  • Walnut
  • Warren
  • Waterman
  • Watseka
  • Wenona
  • West Brooklyn
  • Wilmington
  • Wilton
  • Wilton Center
  • Winnebago
  • Winslow
  • Wonder Lake
  • Wonder Lake (CDP)
  • Woodstock
  • Woosung

Overlay System

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 Location Map

Area Code 815 Location on Illinois Map

Area code 815 is a General Purpose Code which was placed in service on January 1, 1947.

815 Area Code Prefixes

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.

Prefixes by Company

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

Prefixes by Rate Center

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

Other Illinois Area Codes

Lookup phone numbers starting with other Illinois area codes: