Illinois, United States
Central Time
2:42 PM
Area Code
815
State / Province
Illinois
Country
United States
Time Zone
Central Time
Area code 815 covers 203 cities and communities across Illinois, based on telephone company rate center data.
Use the E.164 format for clickable phone links (RFC 3966):
<a href="tel:+18155550100">+18155550100</a><a href="tel:+18155550199">+18155550199</a>Look up which exchange in Illinois a specific 815 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.
786 active prefixes in this area code, assigned as 5,552 thousands-blocks — pooling splits one prefix across several carriers, so each block is listed separately with the rate centre it is homed to, its carrier of record, and the switch that serves it.
Showing blocks 1–100 of 5,552
| NPA-NXX | Block | Rate centre | Type | Carrier (OCN) | Switch | LATA | LIR | Dates |
|---|---|---|---|---|---|---|---|---|
| 815-200 | 0 | La Salle | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-200 | 1 | La Salle | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-200 | 2 | La Salle | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-200 | 3 | La Salle | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-200 | 4 | La Salle | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-200 | 5 | La Salle | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-200 | 6 | La Salle | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-200 | 7 | La Salle | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-200 | 8 | La Salle | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-200 | 9 | La Salle | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-200 | A | La Salle | Landline or VoIP | PAETEC ITEL, LLC (829J) | CHCGILWBXWZ | 358 | — | — |
| 815-201 | 0 | Sheridan | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-201 | 1 | Sheridan | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-201 | 2 | Sheridan | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-201 | 3 | Sheridan | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-201 | 4 | Sheridan | Wireless | NEW CINGULAR WIRELESS PCS, LLC - IL (6534) | BURGILAHGT3 | 358 | — | — |
| 815-201 | 5 | Sheridan | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-201 | 6 | Sheridan | Wireless | NEW CINGULAR WIRELESS PCS, LLC - IL (6534) | BURGILAHGT3 | 358 | — | — |
| 815-201 | 7 | Sheridan | Landline or VoIP | CENTURYLINK COMMUNICATIONS, LLC (508J) | CHCGILDT8MD | 358 | — | — |
| 815-201 | 8 | Sheridan | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-201 | 9 | Sheridan | Landline or VoIP | COMCAST IP PHONE, LLC (318J) | CHCGILNEXJX | 358 | — | — |
| 815-201 | A | Sheridan | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-202 | 0 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | 1 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | 2 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | 3 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | 4 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | 5 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | 6 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | 7 | Oglesby | Landline or VoIP | PAETEC ITEL, LLC (829J) | CHCGILWBXWZ | 358 | — | — |
| 815-202 | 8 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | 9 | Oglesby | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-202 | A | Oglesby | Wireless | NEW CINGULAR WIRELESS PCS, LLC - IL (6534) | BURGILAHGT3 | 358 | — | — |
| 815-203 | A | Joliet | Landline or VoIP | SPOK, INC. (6630) | LBRDILGOAMD | 358 | — | — |
| 815-204 | A | Crystal Lake | Landline or VoIP | SPOK, INC. (6630) | LBRDILGOAMD | 358 | — | — |
| 815-205 | 0 | Coal City | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-205 | 1 | Coal City | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-205 | 2 | Coal City | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-205 | 3 | Coal City | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-205 | 4 | Coal City | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-205 | 5 | Coal City | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-205 | 6 | Coal City | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-205 | 7 | Coal City | Landline or VoIP | CENTURYLINK COMMUNICATIONS, LLC (508J) | CHCGILDT8MD | 358 | — | — |
| 815-205 | 8 | Coal City | Landline or VoIP | TELNYX LLC (073H) | CHCGILWUJMD | 358 | — | — |
| 815-205 | 9 | Coal City | Landline or VoIP | ONVOY, LLC (224C) | CHICAGO | 358 | — | — |
| 815-205 | A | Coal City | Landline or VoIP | CENTURYLINK COMMUNICATIONS, LLC (508J) | CHCGILDT8MD | 358 | — | — |
| 815-206 | 0 | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-206 | 1 | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-206 | 2 | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-206 | 3 | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-206 | 4 | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-206 | 5 | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-206 | 6 | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-206 | 7 | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-206 | 8 | Woodstock | Landline or VoIP | BANDWIDTH.COM CLEC, LLC - IL (984E) | CHCGILWBXDZ | 358 | — | — |
| 815-206 | 9 | Woodstock | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-206 | A | Woodstock | Landline | ILLINOIS BELL TEL CO (9329) | WOODSTOCK | 358 | — | — |
| 815-207 | 0 | Joliet | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-207 | 1 | Joliet | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-207 | 2 | Joliet | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136) | OKBRILOAXEX | 358 | — | — |
| 815-207 | 3 | Joliet | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RVDLILBDAMD | 358 | — | — |
| 815-207 | 4 | Joliet | Landline | ILLINOIS BELL TEL CO (9329) | JOLIET WEST | 358 | — | — |
| 815-207 | 5 | Joliet | Landline | ILLINOIS BELL TEL CO (9329) | JOLIET WEST | 358 | — | — |
| 815-207 | 6 | Joliet | Landline or VoIP | FIRST COMMUNICATIONS, LLC (460K) | CHCGILWUX6X | 358 | — | — |
| 815-207 | 7 | Joliet | Landline or VoIP | PAETEC ITEL, LLC (829J) | CHCGILWBXWZ | 358 | — | — |
| 815-207 | 8 | Joliet | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - IL (6115) | CHICAGO | 358 | — | — |
| 815-207 | 9 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | — | 358 | — | — |
| 815-207 | A | Joliet | Landline or VoIP | TELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136) | OKBRILOAXEX | 358 | — | — |
| 815-208 | 0 | Fulton | Landline or VoIP | METROPCS, INC. (5562) | DKLBILRSDMD | 364 | — | — |
| 815-208 | 1 | Fulton | Landline or VoIP | METROPCS, INC. (5562) | DKLBILRSDMD | 364 | — | — |
| 815-208 | 2 | Fulton | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - IL (6115) | DKLBILRS0MD | 364 | — | — |
| 815-208 | 3 | Fulton | Landline or VoIP | METROPCS, INC. (5562) | DKLBILRSDMD | 364 | — | — |
| 815-208 | 4 | Fulton | Landline or VoIP | METROPCS, INC. (5562) | DKLBILRSDMD | 364 | — | — |
| 815-208 | 5 | Fulton | Landline or VoIP | METROPCS, INC. (5562) | DKLBILRSDMD | 364 | — | — |
| 815-208 | 6 | Fulton | Landline or VoIP | CENTURYLINK COMMUNICATIONS, LLC (508J) | DIXNILXAEMD | 364 | — | — |
| 815-208 | 7 | Fulton | Landline or VoIP | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL (846F) | DIXNILXA0MD | 364 | — | — |
| 815-208 | 8 | Fulton | Landline or VoIP | METROPCS, INC. (5562) | DKLBILRSDMD | 364 | — | — |
| 815-208 | 9 | Fulton | Landline or VoIP | METROPCS, INC. (5562) | DKLBILRSDMD | 364 | — | — |
| 815-208 | A | Fulton | Landline or VoIP | MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL (846F) | DIXNILXA0MD | 364 | — | — |
| 815-209 | 0 | Rockford | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - IL (6115) | RCFRILRCJMD | 360 | — | — |
| 815-209 | 1 | Rockford | Wireless | T-MOBILE USA, INC. (6529) | RCFRILRCMMD | 360 | — | — |
| 815-209 | 2 | Rockford | Landline or VoIP | PAETEC ITEL, LLC (829J) | RCFRILRTXOY | 360 | — | — |
| 815-209 | 3 | Rockford | Wireless | T-MOBILE USA, INC. (6529) | RCFRILRCMMD | 360 | — | — |
| 815-209 | 4 | Rockford | Wireless | T-MOBILE USA, INC. (6529) | RCFRILRCMMD | 360 | — | — |
| 815-209 | 5 | Rockford | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RCFRILRTX5Y | 360 | — | — |
| 815-209 | 6 | Rockford | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RCFRILRTX5Y | 360 | — | — |
| 815-209 | 7 | Rockford | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RCFRILRTX5Y | 360 | — | — |
| 815-209 | 8 | Rockford | Wireless | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333) | RCFRILRTX5Y | 360 | — | — |
| 815-209 | 9 | Rockford | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - IL (6115) | RCFRILRCJMD | 360 | — | — |
| 815-209 | A | Rockford | Landline or VoIP | LEVEL 3 COMMUNICATIONS, LLC - IL (6115) | RCFRILRCJMD | 360 | — | — |
| 815-210 | A | Joliet | Wireless | NEW CINGULAR WIRELESS PCS, LLC - IL (6534) | BURGILAHGT3 | 358 | — | — |
| 815-212 | 0 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-212 | 1 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-212 | 2 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-212 | 3 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-212 | 4 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-212 | 5 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-212 | 6 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-212 | 7 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
| 815-212 | 8 | Joliet | Wireless | T-MOBILE USA, INC. (6529) | ELGNILOTGT5 | 358 | — | — |
Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.
Assigned Prefixes
786
Assignment Blocks
5,552
Rate Centers
203
Carriers of Record
64
| Type | Blocks | Share |
|---|---|---|
| Landline | 1,276 | 23% |
| Landline or VoIP | 2,749 | 50% |
| Wireless | 1,527 | 28% |
| Carrier | Blocks |
|---|---|
| T-MOBILE USA, INC. | 597 |
| ONVOY, LLC | 589 |
| FRONTIER NORTH, INC. - IL | 568 |
| ILLINOIS BELL TEL CO | 540 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 402 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 313 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 289 |
| UNITED STATES CELLULAR - IL | 244 |
| BANDWIDTH.COM CLEC, LLC - IL | 198 |
| COMCAST IP PHONE, LLC | 158 |
| 54 other carriers | 1,654 |
Carrier of record for each block. Numbers ported to another carrier keep their original block assignment, so this is not a lookup of who serves a given number today.
| Rate Center | Prefixes | Blocks |
|---|---|---|
| Rockford | 89 | 546 |
| Joliet | 56 | 376 |
| Kankakee | 33 | 180 |
| Woodstock | 28 | 167 |
| De Kalb | 24 | 174 |
| Freeport | 18 | 137 |
| McHenry | 18 | 113 |
| Crystal Lake | 16 | 104 |
| Plainfield | 15 | 95 |
| Sterling | 15 | 116 |
| Lockport | 14 | 122 |
| Morris | 12 | 90 |
| Ottawa | 11 | 85 |
| Dixon | 9 | 43 |
| La Salle | 9 | 78 |
| Oglesby | 9 | 59 |
| Princeton | 9 | 58 |
| Minooka | 8 | 75 |
| Belvidere | 7 | 54 |
| New Lenox | 7 | 55 |
| Streator | 7 | 47 |
| Crescent City | 6 | 34 |
| Frankfort | 6 | 46 |
| Gardner | 6 | 40 |
| Joliet West | 6 | 6 |
| La Grange | 6 | 6 |
| Coal City | 5 | 48 |
| Manhattan | 5 | 51 |
| Marseilles | 5 | 24 |
| Mendota | 5 | 42 |
| Momence | 5 | 55 |
| Pontiac | 5 | 45 |
| Rochelle | 5 | 35 |
| Sycamore | 5 | 35 |
| Utica | 5 | 43 |
| Elwood | 4 | 40 |
| Galena | 4 | 23 |
| Grant Park | 4 | 38 |
| Harvard | 4 | 33 |
| Morrison | 4 | 11 |
| Romeoville | 4 | 34 |
| Seneca | 4 | 35 |
| Watseka | 4 | 32 |
| Apple River | 3 | 16 |
| Braidwood | 3 | 33 |
| Byron | 3 | 22 |
| Chadwick | 3 | 13 |
| Earlville | 3 | 32 |
| Elizabeth | 3 | 21 |
| Gilman | 3 | 25 |
| Lanark | 3 | 18 |
| Marengo | 3 | 31 |
| Milledgeville | 3 | 13 |
| New Milford | 3 | 13 |
| Oregon | 3 | 28 |
| Pearl City | 3 | 14 |
| Prophetstown | 3 | 13 |
| Rockton | 3 | 23 |
| Roscoe | 3 | 23 |
| Savanna | 3 | 8 |
| Shannon | 3 | 16 |
| Somonauk | 3 | 27 |
| South Beloit | 3 | 8 |
| Amboy | 2 | 17 |
| Ashkum | 2 | 20 |
| Ashton | 2 | 12 |
| Bureau | 2 | 14 |
| Cedarville | 2 | 11 |
| Chebanse | 2 | 19 |
| Chenoa | 2 | 18 |
| Cherry Valley | 2 | 22 |
| Clifton | 2 | 18 |
| Cornell | 2 | 4 |
| Cullom | 2 | 10 |
| Dakota | 2 | 11 |
| Davis | 2 | 11 |
| Durand | 2 | 12 |
| Dwight | 2 | 22 |
| East Dubuque | 2 | 11 |
| Forreston | 2 | 11 |
| Franklin Grove | 2 | 12 |
| Fulton | 2 | 12 |
| German Valley | 2 | 11 |
| Hanover | 2 | 11 |
| Harmon | 2 | 12 |
| Hebron | 2 | 19 |
| Hennepin | 2 | 12 |
| Herscher | 2 | 21 |
| La Moille | 2 | 14 |
| Ladd | 2 | 18 |
| Leaf River | 2 | 2 |
| Lena | 2 | 12 |
| Lyndon | 2 | 5 |
| Manlius | 2 | 16 |
| Manteno | 2 | 22 |
| Massbach | 2 | 9 |
| McConnell | 2 | 10 |
| Mount Carroll | 2 | 12 |
| Mount Morris | 2 | 12 |
| Newark | 2 | 16 |
| Orangeville | 2 | 12 |
| Pecatonica | 2 | 12 |
| Plattville | 2 | 21 |
| Polo | 2 | 19 |
| Poplar Grove | 2 | 22 |
| Richmond | 2 | 20 |
| Rock Cut | 2 | 21 |
| Sandwich | 2 | 22 |
| Saunemin | 2 | 10 |
| Scales Mound | 2 | 10 |
| Seward | 2 | 11 |
| Sheridan | 2 | 22 |
| Shirland | 2 | 9 |
| Spring Grove | 2 | 21 |
| Spring Valley | 2 | 22 |
| St Anne | 2 | 20 |
| Stillman Valley | 2 | 15 |
| Stockton | 2 | 12 |
| Sublette | 2 | 12 |
| Tampico | 2 | 20 |
| Thomson | 2 | 5 |
| Union | 2 | 22 |
| Warren | 2 | 12 |
| Waterman | 2 | 22 |
| Wilmington | 2 | 20 |
| Winnebago | 2 | 12 |
| Winslow | 2 | 11 |
| Wonder Lake | 2 | 20 |
| Beaverville | 1 | 9 |
| Cabery | 1 | 10 |
| Campus | 1 | 10 |
| Capron | 1 | 11 |
| Cedar Point | 1 | 11 |
| Chatsworth | 1 | 10 |
| Cissna Park | 1 | 9 |
| Coleta | 1 | 11 |
| Compton | 1 | 9 |
| Creston | 1 | 11 |
| Danforth | 1 | 9 |
| Depue | 1 | 10 |
| Donovan | 1 | 10 |
| Dover | 1 | 9 |
| Emington | 1 | 9 |
| Fairbury | 1 | 10 |
| Flanagan | 1 | 11 |
| Forrest (Livingston) | 1 | 9 |
| Garden Prairie | 1 | 11 |
| Genoa | 1 | 10 |
| Grand Detour | 1 | 11 |
| Grand Ridge | 1 | 9 |
| Granville | 1 | 11 |
| Graymont | 1 | 11 |
| Harding | 1 | 11 |
| Hinckley | 1 | 11 |
| Hooppole | 1 | 11 |
| Hopkins Park | 1 | 11 |
| Kempton | 1 | 11 |
| Kinsman | 1 | 1 |
| Kirkland | 1 | 11 |
| Leland | 1 | 10 |
| Leonore | 1 | 1 |
| Lisbon | 1 | 9 |
| Long Point | 1 | 10 |
| Lostant | 1 | 10 |
| Magnolia | 1 | 10 |
| Malta | 1 | 10 |
| Maple Park | 1 | 10 |
| Martinton | 1 | 8 |
| Mazon | 1 | 10 |
| McNabb | 1 | 1 |
| Milford | 1 | 10 |
| Monroe Center | 1 | 11 |
| Nelson | 1 | 11 |
| Northbrook | 1 | 1 |
| Odell | 1 | 10 |
| Ohio | 1 | 10 |
| Onarga | 1 | 8 |
| Paw Paw | 1 | 10 |
| Piper City | 1 | 10 |
| Putnam | 1 | 8 |
| Ransom | 1 | 1 |
| Reddick | 1 | 10 |
| Rutland | 1 | 10 |
| Shabbona | 1 | 11 |
| Sheffield | 1 | 10 |
| Sheldon | 1 | 9 |
| South Bergen | 1 | 1 |
| South Sharon | 1 | 1 |
| Stelle | 1 | 1 |
| Steward | 1 | 11 |
| Stockland | 1 | 8 |
| Strawn | 1 | 10 |
| Thomas (Bureau) | 1 | 11 |
| Tiskilwa | 1 | 10 |
| Toluca | 1 | 10 |
| Tonica | 1 | 1 |
| Verona | 1 | 8 |
| Walnut | 1 | 10 |
| Wellington | 1 | 9 |
| Wenona | 1 | 10 |
| West Brooklyn | 1 | 8 |
| Woodland | 1 | 11 |
| Wyanet | 1 | 10 |
A rate center is the telephone exchange area a number is homed to. It sets local calling boundaries, and is not the caller's current location.
Area code 815 is a North American Numbering Plan (NANP) telephone area code assigned to Illinois, United States. It is one of 17 area codes serving Illinois. As population and demand for phone numbers grew, the region was divided into multiple numbering plan areas to avoid exhausting the available 7-digit number pool.
Yes. 815 is an active North American Numbering Plan (NANP) area code, currently assigned to Illinois, United States. It is safe to answer or dial calls using this area code.
Area code 815 covers 203 cities and communities in Illinois, including Amboy, Apple River, Ashkum, Ashton, Beaverville, and 198 more localities. This is based on telephone company rate center data — the geographic areas carriers use to determine local calling boundaries and to assign numbers when a business or individual requests a phone number in a specific city.
All numbers in the 815 area code observe Central Time (IANA timezone: America/Chicago). Central Time is UTC−6 in winter (CST) and UTC−5 in summer (CDT). When placing a call to a 815 number from a different time zone, check the current local time above to avoid calling outside of business hours.
From within Illinois, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 815 + 7-digit number for long-distance calls within North America. From outside the US or Canada, dial your country's international exit code followed by 1 815 XXX XXXX. The country code for both the United States and Canada in NANP is +1.
Format 815 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +18155550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.