Area Code Overview

Area code 650 is a geographic telephone area code in California that went into service on August 2, 1997. The geographic regions covered by this area code overlay has a population of approximately 1,922,994.

Overlay and Dialing Rules

Area Code: 650
State: California
Type: General Purpose Code
In Service Date: August 2, 1997
Overlay Complex: 650
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 650

This area code is ranked 165th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 24th out of 39.

5,306,000

Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 650

Total assigned 5,306,000

Wireless

1,549,000 assigned

29.19%

Wireline and VoIP

3,474,000 assigned

65.47%

Other / Unclassified

283,000 assigned

5.33%

Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 650

Estimated assigned wireless phone numbers: 1,549,000

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

AT&T Wireless 661,000 (42.67%)

T-Mobile 488,000 (31.50%)

Verizon Wireless 390,000 (25.18%)

33 WIRELESS INC. 10,000 (0.65%)

Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 650

Estimated assigned wireline and VoIP phone numbers: 3,474,000

AT&T 1,391,000 (40.04%)

Onvoy 699,000 (20.12%)

Bandwidth 410,000 (11.80%)

Lumen 380,000 (10.94%)

Peerless Network 129,000 (3.71%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC 99,000 (2.85%)

Comcast Business 95,000 (2.73%)

Spectrum 64,000 (1.84%)

UTILITY TELECOM GROUP, LLC - CA 49,000 (1.41%)

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 40,000 (1.15%)

Telnyx 25,000 (0.72%)

PAETEC ITEL, LLC 21,000 (0.60%)

Other / Unclassified Assigned Numbering in Area Code 650

Estimated assigned other or unclassified phone numbers: 283,000

TELEPORT COMMUNICATIONS AMERICA, LLC - CA 69,000 (24.38%)

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 47,000 (16.61%)

SPOK, INC. 40,000 (14.13%)

AMERICAN MESSAGING SERVICES, LLC 30,000 (10.60%)

HD CARRIER LLC 26,000 (9.19%)

IP HORIZON LLC 25,000 (8.83%)

FRACTEL, LLC 13,000 (4.59%)

NORTH COUNTY COMMUNICATION CORPORATION - CA 10,000 (3.53%)

SHELCOMM 10,000 (3.53%)

WHITESKY COMMUNICATIONS, LLC 7,000 (2.47%)

TON80 COMMUNICATIONS, LLC 5,000 (1.77%)

AIRESPRING, INC. 1,000 (0.35%)

Cities and Towns in Area Code 650

Half Moon Bay, California La Honda, California Los Altos, California Millbrae, California Moss Beach, California Mountain View, California Pacifica, California Palo Alto, California Pescadero, California Redwood City, California San Carlos, California San Francisco, California San Mateo, California South San Francisco, California Woodside, California

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 650, 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