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628 Area CodeSan Francisco, CA

Area code 628 covers San Francisco and 31 other cities in California: 1,154,046 people in 3 counties, led by San Francisco and Marin, on Pacific Time (PT). It overlays 415.

Overview

Major City
San Francisco
State
California (CA)
Timezone
Pacific Time (PT)
Current Time
–:––
Overlay
Yes – shares area with 415

Nearby Area Codes

Where is area code 628?

Overview of the 628 Area Code

Geographic Coverage of the 628 Area Code

All 32 cities

San Francisco Area Codes Overview

What cities does area code 628 cover?

CityStatePopulationPopulation in 628% of listed-city population% of City
San FranciscoCA827,526823,57470.6%99.5%
Daly CityCA101,41817,2368.7%17.0%
San RafaelCA59,96159,9615.1%100.0%
NovatoCA52,31152,3114.5%100.0%
Mill ValleyCA13,90413,9041.2%100.0%
LarkspurCA12,80712,8071.1%100.0%
San AnselmoCA12,64512,6451.1%100.0%
Tamalpais-Homestead ValleyCA10,73510,7350.9%100.0%
Corte MaderaCA10,00610,0060.9%100.0%
TiburonCA8,9338,9330.8%100.0%
FairfaxCA7,4767,4760.6%100.0%
SausalitoCA7,0757,0750.6%100.0%
KentfieldCA6,4856,4850.5%100.0%
Lucas Valley-MarinwoodCA6,0946,0940.5%100.0%
StrawberryCA5,3935,3930.5%100.0%
BrisbaneCA4,6674,6670.4%100.0%
Santa VenetiaCA4,2924,2920.4%100.0%
Marin CityCA2,6662,6660.2%100.0%
Sleepy HollowCA2,3842,3840.2%100.0%
RossCA2,2972,2970.2%100.0%
BelvedereCA2,0802,0800.2%100.0%
Lagunitas-Forest KnollsCA1,8191,8190.2%100.0%
BolinasCA1,6201,6200.1%100.0%
WoodacreCA1,3481,3480.1%100.0%
Black Point-Green PointCA1,3061,3060.1%100.0%
InvernessCA1,3041,3040.1%100.0%
Point Reyes StationCA8488480.1%100.0%
AltoCA7117110.1%100.0%
Stinson BeachCA6326320.0%100.0%
San GeronimoCA4464460.0%100.0%
Muir BeachCA3103100.0%100.0%
NicasioCA96960.0%100.0%

City population is shown in full; each city's share inside 628 is measured from Census tract centroids.

What counties does area code 628 cover?

CountyStatePopulation in 628% of area-code footprint% of County
San Francisco CountyCA869,79175%100%
Marin CountyCA262,32123%100%
San Mateo CountyCA21,9342%3%
Sources:

Has area code 628 been reported for unwanted calls?

Yes – 952 FTC complaints, May 29 – Oct 1, 2026.

  • 50% robocalls
  • ↑ 36% vs prior period
  • FTC data, retrieved 2026-10-05

Most-reported subjects

  • Other39%371
  • Calls pretending to be government, businesses, or family and friends25%239
  • Reducing your debt (credit cards, mortgage, student loans)14%131

Caller ID is easily spoofed, so these figures reflect the number shown on caller ID, not the caller's true location – an area code alone never identifies a caller. The FTC does not verify the facts in these complaints.

Which prefixes and exchanges belong to area code 628?

16% assigned to a telco

  • 83% Landline
  • 17% Wireless
  • 0% Unknown
PrefixUsageCarrier
(628)200-LandlineOnvoy
(628)201-LandlineOnvoy
(628)202-WirelessT-Mobile Usa
(628)203-LandlineOnvoy
(628)204-WirelessT-Mobile Usa
(628)205-WirelessVerizon Wireless
(628)206-LandlinePacific Bell
(628)207-LandlineBandwidth.Com Clec
(628)208-LandlineVonage America
(628)209-LandlineTelnyx
(628)210-LandlinePeerless Network Of California
(628)212-LandlineBandwidth.Com Clec
(628)213-WirelessT-Mobile Usa
(628)214-LandlinePeerless Network Of California
(628)215-LandlineBandwidth.Com Clec
(628)216-LandlineBandwidth.Com Clec
(628)217-LandlineTeleport Communications America
(628)218-LandlineMcimetro Access Transmission Services
(628)219-WirelessNew Cingular Wireless Pcs
(628)220-LandlineLevel 3 Communications
(628)221-LandlineCenturylink Communications
(628)222-LandlineOnvoy
(628)223-LandlineTeleport Communications America
(628)224-WirelessNew Cingular Wireless Pcs
(628)225-WirelessVerizon Wireless
(628)226-WirelessNew Cingular Wireless Pcs
(628)227-LandlineBandwidth.Com Clec
(628)228-LandlinePacific Bell
(628)229-LandlineOnvoy
(628)230-WirelessVerizon Wireless
(628)231-LandlineTeleport Communications America
(628)232-LandlinePeerless Network Of California
(628)233-WirelessNew Cingular Wireless Pcs
(628)234-LandlineTpx Communications
(628)235-LandlineLevel 3 Communications
(628)236-WirelessT-Mobile Usa
(628)237-WirelessT-Mobile Usa
(628)238-LandlinePeerless Network Of California
(628)239-LandlineBandwidth.Com Clec
(628)240-LandlineMetropcs
(628)241-WirelessT-Mobile Usa
(628)242-LandlinePacific Bell
(628)243-LandlineOnvoy
(628)244-LandlinePeerless Network Of California
(628)245-LandlineOnvoy
(628)246-LandlineBandwidth.Com Clec
(628)247-LandlineTeleport Communications America
(628)248-LandlineTeleport Communications America
(628)249-WirelessVerizon Wireless
(628)250-WirelessVerizon Wireless
(628)251-LandlinePeerless Network Of California
(628)252-WirelessT-Mobile Usa
(628)253-LandlineBandwidth.Com Clec
(628)254-LandlineBandwidth.Com Clec
(628)255-WirelessVerizon Wireless
(628)256-LandlineSonic Telecom
(628)257-LandlineRace Telecommunications
(628)258-WirelessT-Mobile Usa
(628)259-WirelessNew Cingular Wireless Pcs
(628)260-LandlineTeleport Communications America
(628)261-LandlineTerra Nova Telecom
(628)262-LandlineExiant Communications
(628)263-LandlineMcimetro Access Transmission Services
(628)264-WirelessT-Mobile Usa
(628)265-LandlineBandwidth.Com Clec
(628)266-LandlineBandwidth.Com Clec
(628)267-LandlineTeleport Communications America
(628)268-LandlineLevel 3 Communications
(628)269-WirelessT-Mobile Usa
(628)270-LandlineSonic Telecom
(628)271-LandlineOnvoy Spectrum
(628)272-LandlineOnvoy
(628)273-LandlineLevel 3 Communications
(628)274-LandlineLevel 3 Communications
(628)275-LandlineLevel 3 Communications
(628)276-LandlineWhitesky Communications
(628)277-LandlineTelnyx
(628)278-WirelessNew Cingular Wireless Pcs
(628)279-LandlineBandwidth.Com Clec
(628)280-LandlineSonic Telecom
(628)281-LandlineNuso
(628)282-LandlineAt&T
(628)283-WirelessT-Mobile Usa
(628)284-LandlinePaetec Communications
(628)285-LandlineOnvoy
(628)286-LandlineWide Voice
(628)287-LandlineFive9
(628)288-LandlineFractel
(628)299-LandlineFractel
(628)300-LandlineOnvoy
(628)313-WirelessT-Mobile Usa
(628)321-LandlineTeleport Communications America
(628)322-LandlineTeleport Communications America
(628)323-LandlineTeleport Communications America
(628)324-LandlineTeleport Communications America
(628)325-LandlineTeleport Communications America
(628)326-LandlineTeleport Communications America
(628)333-LandlineOnvoy
(628)336-LandlineFractel
(628)345-LandlineFractel
(628)348-LandlineFractel
(628)356-LandlineFractel
(628)358-WirelessT-Mobile Usa
(628)363-WirelessVerizon Wireless
(628)377-LandlineFractel
(628)386-LandlineFractel
(628)388-LandlineFractel
(628)399-LandlineFractel
(628)400-LandlineOnvoy
(628)432-LandlineFractel
(628)433-LandlineBandwidth.Com Clec
(628)444-LandlineOnvoy
(628)465-LandlineFractel
(628)466-LandlineWavenation
(628)468-LandlineSkyetel
(628)477-LandlineFractel
(628)488-LandlineFractel
(628)500-LandlineOnvoy
(628)502-WirelessVerizon Wireless
(628)529-LandlineFractel
(628)561-LandlinePeerless Network Of California
(628)577-LandlineFractel
(628)587-LandlineFractel
(628)588-LandlineFractel
(628)600-LandlineOnvoy
(628)626-LandlineOnvoy
(628)628-LandlineFractel
(628)629-LandlineHd Carrier
(628)652-LandlineTeleport Communications America
(628)666-LandlineOnvoy
(628)667-LandlineFractel
(628)677-LandlineFractel
(628)682-LandlineTwilio International
(628)688-LandlineFractel
(628)699-LandlineFractel
(628)724-LandlineFractel
(628)732-LandlineFractel
(628)754-LandlineTeleport Communications America
(628)758-LandlineFractel
(628)766-LandlineFractel
(628)777-LandlineOnvoy
(628)786-LandlineFractel
(628)788-LandlineFractel
(628)789-LandlineLeap Telecom
(628)800-LandlineOnvoy
(628)842-LandlineFractel
(628)866-LandlineFractel
(628)867-LandlineCommio
(628)877-LandlineOnvoy
(628)888-LandlineOnvoy
(628)895-LandlineRclec
(628)899-LandlinePeerless Network Of California
(628)900-LandlineOnvoy
(628)946-LandlineFractel
(628)977-LandlineFractel
(628)999-LandlineOnvoy

Frequently Asked Questions about the 628 Area Code

Who called me from a 628 number?

17% of its assigned prefixes are wireless. Largest holders: Fractel, Onvoy, and Teleport Communications America.

Is 628 a scam area code?

Carriers hold 16% of its possible prefixes.

Why do I keep getting calls from the 628 area code?

Complaints rose 36% on the prior period.

Should I answer an unknown 628 number?

50% of its FTC complaints were robocalls. Its most-reported specific subject was "Calls pretending to be government, businesses, or family and friends", at 25%.

How do I block calls from the 628 area code?

Blocking 628 still lets 415 numbers through.

Where is area code 628?

628 covers 32 cities and 1,154,046 residents in 3 California counties, led by San Francisco, Marin, and San Mateo.

When did area code 628 go into service?

628 went into service on March 21, 2015. It was added to overlay 415.

Is 628 a real area code?

Yes: 34 carriers hold its prefixes, serving 32 cities in San Francisco, Marin, and San Mateo counties.

What timezone is the 628 area code in?

628 is on Pacific Time (PT).

How do I call a 628 number from abroad?

Dial +1 628, then the number.

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