Look up any phone number starting with 815 to identify the owner name, address, spam reports, and more. The 815 area code covers most of northern Illinois outside the Quad Cities areas, and includes the Joliet area and some of Chicago’s western and northwestern suburbs.
Look Up an 815 Phone Number
Enter a full 10-digit number to identify the caller and whether it has been reported as spam.
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/815
Where Is Area Code 815 Located?
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 Location Map
Area code 815 is a general purpose code which was placed in service on January 1, 1947.
Phone Number Prefixes and Carriers
Our Illinois phone number lookup for the 815 area code analyzes the three-digit prefix to identify the initially assigned telecommunications company and rate center. This prefix code data may help to determine the U.S. carrier, Illinois geographic region, and local calling area associated with the phone number.
Phone numbers follow the following structure under the North American Numbering Plan:
NPA- area code (where the number was originally assigned)
NXX - Central office code that locates the specific neighborhood and identifies the service provider
XXXX - Subscriber number identifies the individual phone line within that local exchange
Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.
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
Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.
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
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