Area Code773

Illinois, United States

Central Time

3:31 PM

Area Code

773

State / Province

Illinois

Country

United States

Time Zone

Central Time

Cities and Communities Served

ChicagoRiver GroveSchiller ParkSummit

Area code 773 covers 4 cities and communities across Illinois, based on telephone company rate center data.

tel: Link Format

Use the E.164 format for clickable phone links (RFC 3966):

<a href="tel:+17735550100">+17735550100</a>
<a href="tel:+17735550199">+17735550199</a>
Full tel: URI guide
View all United States area codes on map →

Check a 773 Number

Look up which exchange in Illinois a specific 773 number is homed to, and whether its block is wireline or wireless. See what a reverse lookup can establish before relying on the answer.

Prefix Blocks (NPA-NXX)

786 active prefixes in this area code, assigned as 5,360 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 5,360

NPA-NXXBlockRate centreTypeCarrier (OCN)SwitchLATALIRDates
773-2000Chicago Zone 02-EdgewaterLandline or VoIPFIVE9, INC. (598J)CHCGILWUX5X358——
773-2001Chicago Zone 02-EdgewaterWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2002Chicago Zone 02-EdgewaterLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2003Chicago Zone 02-EdgewaterLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2004Chicago Zone 02-EdgewaterLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2005Chicago Zone 02-EdgewaterWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2006Chicago Zone 02-EdgewaterWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2007Chicago Zone 02-EdgewaterWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2008Chicago Zone 02-EdgewaterWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2009Chicago Zone 02-EdgewaterWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-200AChicago Zone 02-EdgewaterLandline or VoIPFIVE9, INC. (598J)CHCGILWUX5X358——
773-201AChicago Zone 01-WabashLandline or VoIPSPOK, INC. (6630)LBRDILGOAMD358——
773-2020Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2021Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2022Chicago Zone 03-KildareWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)SCBGILRRGT1358——
773-2023Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2024Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2025Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2026Chicago Zone 03-KildareWirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333)RVDLILBDAMD358——
773-2027Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2028Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2029Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-202AChicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-203AChicago Zone 01-WabashWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)BURGILAHGT3358——
773-2040Chicago Zone 07-StewartLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2041Chicago Zone 07-StewartWirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333)RVDLILBDAMD358——
773-2042Chicago Zone 07-StewartWirelessCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL (6333)RVDLILBDAMD358——
773-2043Chicago Zone 07-StewartLandline or VoIPHD CARRIER LLC (321J)CHCGILWUVMD358——
773-2044Chicago Zone 07-StewartLandline or VoIPTELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136)OKBRILOAXEX358——
773-2045Chicago Zone 07-StewartLandline or VoIPTELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136)OKBRILOAXEX358——
773-2046Chicago Zone 07-StewartLandline or VoIPTELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136)OKBRILOAXEX358——
773-2047Chicago Zone 07-StewartLandline or VoIPTELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136)OKBRILOAXEX358——
773-2048Chicago Zone 07-StewartLandline or VoIPTELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136)OKBRILOAXEX358——
773-2049Chicago Zone 07-StewartLandline or VoIPTELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136)OKBRILOAXEX358——
773-204AChicago Zone 07-StewartLandline or VoIPTELEPORT COMMUNICATIONS AMERICA, LLC - IL (7136)OKBRILOAXEX358——
773-2050Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2051Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2052Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2053Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2054Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2055Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2056Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2057Chicago Zone 03-KildareWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)SCBGILRRGT1358——
773-2058Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-2059Chicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-205AChicago Zone 03-KildareLandlineILLINOIS BELL TEL CO (9329)CHICAGO KILDARE358——
773-206AChicago Zone 01-WabashWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)BURGILAHGT3358——
773-2070Chicago Zone 10-BeverlyLandline or VoIPTELNYX LLC (073H)CHCGILWUJMD358——
773-2071Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2072Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2073Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2074Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2075Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2076Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2077Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2078Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-2079Chicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-207AChicago Zone 10-BeverlyLandline or VoIPONVOY, LLC (224C)CHICAGO358——
773-208AChicago Zone 01-WabashWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)BURGILAHGT3358——
773-2090Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2091Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2092Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2093Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2094Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2095Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2096Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2097Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2098Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2099Chicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-209AChicago Zone 03-KildareWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-210AChicago Zone 01-WabashLandlineILLINOIS BELL TEL CO (9329)CHICAGO358——
773-212AChicago Zone 03-KildareLandline or VoIPSPOK, INC. (6630)LBRDILGOAMD358——
773-213AChicago Zone 01-WabashWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)BURGILAHGT3358——
773-214AChicago Zone 01-WabashLandline or VoIPSPOK, INC. (6630)LBRDILGOAMD358——
773-215AChicago Zone 01-CalumetLandline or VoIPSPOK, INC. (6630)LBRDILGOAMD358——
773-2160Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2161Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2162Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2163Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2164Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2165Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2166Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2167Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2168Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2169Chicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-216AChicago Zone 01-CalumetWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2170Chicago Zone 09-South ChicagoLandline or VoIPBANDWIDTH.COM CLEC, LLC - IL (984E)CHCGILWBXDZ358——
773-2171Chicago Zone 09-South ChicagoLandline or VoIPPAETEC ITEL, LLC (829J)CHCGILWBXWZ358——
773-2172Chicago Zone 09-South ChicagoWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)BURGILAHGT3358——
773-2173Chicago Zone 09-South ChicagoWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2174Chicago Zone 09-South ChicagoWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2175Chicago Zone 09-South ChicagoWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2176Chicago Zone 09-South ChicagoWirelessT-MOBILE USA, INC. (6529)ELGNILOTGT5358——
773-2177Chicago Zone 09-South ChicagoLandline or VoIPIP HORIZON LLC (515J)—358——
773-2178Chicago Zone 09-South ChicagoLandline or VoIPBANDWIDTH.COM CLEC, LLC - IL (984E)CHCGILWBXDZ358——
773-2179Chicago Zone 09-South ChicagoLandline or VoIPBANDWIDTH.COM CLEC, LLC - IL (984E)CHCGILWBXDZ358——
773-217AChicago Zone 09-South ChicagoWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)BURGILAHGT3358——
773-218AChicago Zone 01-WabashWirelessNEW CINGULAR WIRELESS PCS, LLC - IL (6534)BURGILAHGT3358——
773-2190Chicago Zone 07-StewartLandline or VoIPBANDWIDTH.COM CLEC, LLC - IL (984E)CHCGILWBXDZ358——
773-2191Chicago Zone 07-StewartLandline or VoIPBANDWIDTH.COM CLEC, LLC - IL (984E)CHCGILWBXDZ358——

Search and page through all 5,360 blocks →

Area Code 773 Numbering Data

Block-level assignments from the North American Numbering Plan administrator, via localcallingguide.com.

Assigned Prefixes

786

Assignment Blocks

5,360

Rate Centers

27

Carriers of Record

37

Line Types

TypeBlocksShare
Landline79215%
Landline or VoIP1,92336%
Wireless2,64549%

Carriers of Record

CarrierBlocks
T-MOBILE USA, INC.1,738
ILLINOIS BELL TEL CO792
NEW CINGULAR WIRELESS PCS, LLC - IL457
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL354
ONVOY, LLC320
BANDWIDTH.COM CLEC, LLC - IL309
LEVEL 3 COMMUNICATIONS, LLC - IL288
MCIMETRO ACCESS TRANSMISSION SERVICES LLC224
PAETEC ITEL, LLC154
COMCAST IP PHONE, LLC134
27 other carriers590

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.

Prefixes by Rate Center

Rate CenterPrefixesBlocks
Chicago Zone 03-Kildare1371,226
Chicago Zone 01-Wabash93173
Chicago Zone 10-Beverly58528
Chicago Zone 02-Edgewater51400
Chicago Zone 07-Stewart50439
Chicago Zone 04-Humboldt47387
Chicago Zone 03-Newcastle32182
Chicago Zone 06-Kedzie32302
Chicago Zone 01-Calumet31158
Chicago Zone 08-Portsmouth30240
Chicago Zone 04-Lakeview2868
Chicago Zone 05-Austin28269
Chicago Zone 09-South Chicago24164
Chicago Zone 11-O'Hare20179
Chicago Zone 06-Lafayette1757
Chicago Zone 07-Hyde Park16106
Chicago Zone 02-Irving1575
Chicago Zone 10-Pullman1464
Chicago Zone 02-Rogers Park1323
Chicago Zone 05-Merrimac1262
Chicago Zone 07-Oakland12102
Chicago Zone 08-Prospect1030
Chicago Zone 06-Lawndale656
Summit535
Chicago Zone 09-Mitchell212
River Grove212
Schiller Park111

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.

LATA
358
Incumbent Carrier
ILLINOIS BELL TEL CO

About Area Code 773

Area code 773 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.

Is 773 a valid area code?

Yes. 773 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.

Where is area code 773?

Area code 773 covers 4 cities and communities in Illinois, including Chicago, River Grove, Schiller Park, Summit. 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.

What time zone is area code 773?

All numbers in the 773 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 773 number from a different time zone, check the current local time above to avoid calling outside of business hours.

How do I dial a 773 number?

From within Illinois, dial the 7-digit local number directly if calling within the same rate center, or dial 1 + 773 + 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 1 773 XXX XXXX. The country code for both the United States and Canada in NANP is +1.

Formatting 773 phone numbers

Format 773 numbers using E.164 notation as required by RFC 3966: prefix with +1 and omit dashes and parentheses (e.g., +17735550100). This format ensures tel: links work correctly on all mobile browsers and VoIP apps. See the tel: URI formatting guide for complete examples.

Other Area Codes in Illinois

217224309312331447464618