Area Code Overview

Area code 630 is a geographic telephone area code in Illinois that went into service on August 3, 1996. The geographic regions covered by this area code overlay has a population of approximately 4,270,814.

Overlay and Dialing Rules

Area Code: 630
State: Illinois
Type: General Purpose Code
In Service Date: August 3, 1996
Overlay Complex: 331/630
Local Dialing Plan: This area requires you to dial 1 and the area code when calling locally.

Estimated Number of Assigned Phone Numbers in Area Code 630

This area code is ranked 40th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 4th out of 16.

6,670,000

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 630

Total assigned 6,670,000

Wireless

2,771,000 assigned

41.54%

Wireline and VoIP

3,362,000 assigned

50.40%

Other / Unclassified

537,000 assigned

8.05%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 630

Estimated assigned wireless phone numbers: 2,771,000

Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.

T-Mobile 1,119,000 (40.38%)

AT&T Wireless 839,000 (30.28%)

Verizon Wireless 813,000 (29.34%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 630

Estimated assigned wireline and VoIP phone numbers: 3,362,000

AT&T 2,139,000 (63.62%)

Onvoy 287,000 (8.54%)

Lumen 250,000 (7.44%)

Bandwidth 187,000 (5.56%)

Comcast Business 106,000 (3.15%)

PAETEC ITEL, LLC 90,000 (2.68%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 86,000 (2.56%)

Peerless Network 64,000 (1.90%)

Spectrum 50,000 (1.49%)

TERRA NOVA TELECOM INC. 32,000 (0.95%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 31,000 (0.92%)

RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 22,000 (0.65%)

Other / Unclassified Assigned Numbering in Area Code 630

Estimated assigned other or unclassified phone numbers: 537,000

FIRST COMMUNICATIONS, LLC 194,000 (36.13%)

SPOK, INC. 140,000 (26.07%)

AMERICAN MESSAGING SERVICES, LLC 70,000 (13.04%)

TELEPORT COMMUNICATIONS AMERICA, LLC - IL 43,000 (8.01%)

ACCESS ONE, INC. - IL 39,000 (7.26%)

INDIANA PAGING NETWORK, INC. 20,000 (3.72%)

IP HORIZON LLC 13,000 (2.42%)

MCC TELEPHONY LLC 8,000 (1.49%)

STRATUS NETWORKS 5,000 (0.93%)

CLEAR RATE COMMUNICATIONS, LLC 4,000 (0.74%)

HD CARRIER LLC 1,000 (0.19%)

How These Figures Were Built

These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 630, not live customer counts.

Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.

They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.

Population data and locality matching provided by GeoNames.

Last refreshed: April 15, 2026 6:22 pm

630 Area Code