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Before You Call Back

Area code 650

Area code 650 serves California, including Palo Alto, San Mateo and Mountain View (Pacific time). It has been in service since August 2, 1997.

Numbers starting with 650 drew 1,505 reports to the FTC from Aug 14, 2026 to Nov 11, 2026 and 717 complaints to the FCC since November 2023. The number on your screen can be faked, so a 650 number proves nothing about where a call came from.

Location
CaliforniaSan Francisco-Oakland-Fremont, CA Metropolitan Statistical Area and San Jose-Sunnyvale-Santa Clara, CA Metropolitan Statistical Area
Time zone
Pacific
In service since
August 2, 1997Created from 415
Overlay
None: the only code for its area
Local calls
Dial 1 + 10 digits
Exchanges in use
717 of 792held by 36 carriers
Projected to run out
1Q 2038NANPA forecast 2026.2

Complaints about 650 numbers

Reports where the number on the consumer's caller ID (or, for the FCC, the number the caller asked them to call back) starts with 650. These are counts of what people reported; the agencies do not verify them.

FTC reports, Aug 14, 2026 to Nov 11, 2026

1,505

FCC complaints since November 2023

717

Different 650 numbers reported

1,758

FCC complaints naming a 650 number, by month

November 2023 to October 2026. Source: FCC Consumer Complaints Data.

Show as a table
MonthComplaints
November 202341
December 202322
January 202424
February 202421
March 202415
April 202414
May 202421
June 202426
July 202424
August 202414
September 202420
October 202423
November 202423
December 202410
January 20256
February 20257
March 202516
April 202516
May 202516
June 202517
July 202525
August 202517
September 202510
October 20251
November 202510
December 202511
January 202618
February 202615
March 202620
April 202618
May 202627
June 202632
July 202617
August 202622
September 202627
October 202649

What people said 650 calls were about

Subjects picked in FTC reports, August 14, 2026 to November 11, 2026. 855 of 1,505 reports were robocalls.

Show as a table
SubjectReports
Other551
Calls pretending to be government, businesses, or family and friends317
Reducing your debt (credit cards, mortgage, student loans)223
Dropped call or no message152
Computer and technical support52
Medical and prescriptions34

Most reported 650 numbers

Numbers with at least five reports from three or more places in the last twelve months. Many of them are likely spoofed.

Places served by 650

NANPA lists 15 rate centers for 650. A rate center is the town or district a block of numbers is tied to for billing; sorted here by how many exchanges each holds.
  • Palo Alto145
  • San Mateo126
  • Mountain View93
  • South San Francisco90
  • Redwood City65
  • San Carlos-Belmont44
  • Los Altos28
  • Millbrae24
  • San Francisco: Juniper DA22
  • Half Moon Bay21
  • Pacifica18
  • Woodside14
  • Pescadero11
  • La Honda9
  • Moss Beach7

Phone companies holding 650 exchanges

Each exchange (the three digits after the area code) is assigned to one carrier. 72% of these exchanges are pooled: their numbers are handed out in blocks of 1,000 to other carriers, so the holder below is not always the company serving a given number.

Exchanges held, top 8 of 36 carriers

NANPA central office code assignments, file of November 11, 2026.

Show as a table
Carrier (legal name)Exchanges
Pacific Bell272
New Cingular Wireless PCS, LLC59
T-Mobile USA, Inc.58
Onvoy, LLC - CA45
Level 3 Communications, LLC - CA42
Mcimetro Access Transmission Services LLC42
Cellco Partnership dba Verizon Wireless - CA36
Teleport Communications America, LLC - CA26

When today's 650 exchanges were assigned

Exchanges still assigned, by year of assignment. Exchanges returned since are not counted.

Show as a table
YearExchanges
200119
20028
20031
20041
20052
20061
20071
20081
20091
20101
20111
20121
20134
201412
201511
201616
20175
201810
201911
20207
202112
202218
20239
20245
20253
202610

Check a 650 number

A check shows the carrier and rate center of the number's exchange and every FTC and FCC report about that exact number. Why the number on screen can be fake.

Other area codes in California

NANPA area code database and central office code file of November 11, 2026; FCC complaints November 1, 2023 to November 11, 2026; FTC reports August 14, 2026 to November 11, 2026. How the data is used.

Official sources (7)Show