Local numbers · USA
Get Foster City virtual phone numbers
Unlimited calling and texting.
A Ghost number for Foster City works like a local line for calling and texting, with your pick of area code from 650, 415, 628, 510, 916, or 408. Keep your personal number private for selling online, dating, or work, and start in minutes on your iPhone.
Unwanted calls in Foster City
Between Aug 20, 2026 and Sep 23, 2026, Foster City residents filed 29 unwanted-call reports with the FTC. 31% were robocalls or recorded messages, and impersonation scams led the list. After that: debt relief offers (7%), home improvement and cleaning (7%).
Source: FTC Do Not Call complaint data, Aug 20, 2026 to Sep 23, 2026. Consumer reports, not verified by the FTC.
What iPhone users say
★★★★★
Awesome
This application is awesome! I did a test with two other applications. Ghost is by far the best! ⭐️⭐️⭐️⭐️⭐️
★★★★★
Happy customer
Ghost is an incredible app for a second phone number well please !!!
Selected 5-star reviews from the App Store, shown verbatim.
Why choose a Foster City virtual phone number?
Commuting toward Oakland or Fremont
Foster City sits within the wider Bay Area that stretches to Oakland and Fremont. A Ghost number with a 650 area code reads as local to neighbors and colleagues across that corridor, even if your commute or your listings cross city lines.
A 650 number reads local in San Mateo
San Mateo carries the same 650 area code as Foster City. If you're renting out a room, coordinating a sale, or messaging someone in San Mateo, a 650 Ghost number looks like it belongs to the neighborhood instead of an out-of-area cell.
415 and 628 cover San Francisco calls
San Francisco uses both 415 and 628 as overlay codes for the same region. Picking one of those for your Ghost number makes sense if you work with clients, landlords, or dates based in the city, without changing your personal cell.
San Jose contacts recognize 408
408 is the area code many in San Jose carry. If your work, a marketplace buyer, or a match on a dating app is based in the South Bay, a 408 Ghost number sits closer to their expectations than a number from farther north.
Keep impersonation callers off your main line
Residents here report impersonation scams, callers posing as government agencies, businesses, or family, as the top unwanted call complaint, ahead of debt relief and home improvement pitches. Handing out a second number for online listings or new contacts keeps that traffic off your personal line.
Most popular Foster City virtual phone numbers
| Area code | Serves | Get this area code |
|---|---|---|
| +1 650 | San Mateo | Get a 650 number |
| +1 916 | Sacramento | Get a 916 number |
| +1 510 | Oakland | Get a 510 number |
| +1 415 | San Francisco | Get a 415 number |
| +1 628 | San Francisco | Get a 628 number |
| +1 408 | San Jose | Get a 408 number |
Local economy
Why do business in Foster City?
Foster City sits inside the broader San Francisco Bay Area economy, where technology, healthcare, and logistics tied to neighboring cities shape most local work.
Technology and professional services
The wider Peninsula and South Bay corridor, running toward San Jose, supports a large share of technology and professional service jobs that Foster City residents commute into or work with remotely.
Healthcare and life sciences
Bay Area healthcare and life sciences employers draw workers from across San Mateo County, including Foster City, into clinical and research roles.
Logistics and retail distribution
Nearby hubs like Oakland and Hayward handle regional distribution and freight, supporting retail and logistics work that touches communities throughout the East Bay and Peninsula.
About Foster City
Area codes in service
6
Population
32,657
Foster City's Ghost numbers can carry any of six area codes tied to different parts of the wider Bay Area and beyond: 650, common in nearby San Mateo; 510, carried by many in Oakland; 415 and 628, the overlay pair used in San Francisco; 916, tied to Sacramento; and 408, common in San Jose. Picking one lets you match whichever community you deal with most.
All of these codes sit in the Pacific time zone, and 415 and 628 cover the exact same San Francisco service area rather than two different places, that's why San Francisco needs both.
Residents here report that most unwanted calls arrive as robocalls or recordings. The complaints they file most often describe impersonation scams, callers posing as government offices, businesses, or family, followed by debt relief pitches and home improvement or cleaning solicitations.
Places near Foster City
The closest place to Foster City in the Census list is San Mateo, 3 miles west. The largest nearby is Oakland (443,554 people), 14 miles north. 8 of the 8 places below also use the 650 area code: San Mateo, Redwood City, Belmont, San Carlos, Hillsborough, Burlingame, North Fair Oaks and Atherton.
3 mi west · 103,006 people · area code 650, 415, 628, 916, 510, 408
4 mi southeast · 82,982 people · area code 650, 916, 510, 408, 669, 415
4 mi southwest · 27,132 people · area code 650, 916, 415, 628, 510, 408
5 mi south · 29,403 people · area code 650, 916, 510, 415, 628, 408
6 mi west · 11,171 people · area code 650, 415, 628, 916, 510, 408
6 mi west · 30,885 people · area code 650, 415, 628, 916, 510, 408
7 mi southeast · 14,027 people · area code 916, 650, 510, 408, 669, 415
8 mi south · 7,022 people · area code 650, 916, 510, 408, 669, 415
Distances are straight-line between Census place centers.
Frequently asked questions
How fast can I get a Foster City phone number?
You can pick an area code and activate a Ghost number in minutes on your iPhone. There's no waiting period and no extra hardware.
Which area code should I choose in Foster City?
650 is the code carried by many in nearby San Mateo, so it reads local for Peninsula contacts. If you deal more with San Francisco, Oakland, San Jose, or Sacramento, 415, 628, 510, 408, or 916 might fit better.
Can I use a Foster City number to keep marketplace or dating contacts separate from my main line?
Yes. Give out your Ghost number for listings, matches, or new contacts, and keep your personal cell for people you already know.