Local numbers · USA
Get Union City virtual phone numbers
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Get a real Union City phone number with the area code of your choice, from 510 to 925, 650, 408, 669, or 916. Keep a personal line separate from your main number for selling, dating, or a move, and start using it in minutes.
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Why choose a Union City virtual phone number?
Bordering Fremont and Hayward
Fremont and Hayward sit right on Union City's edge, and marketplace buyers, carpools, and errands cross that line daily. A local number lets you connect with people nearby without your area code pointing straight at your street.
510 already means Oakland and Berkeley
The 510 code covers Oakland and Berkeley too, so a Union City line in that code reads as East Bay to anyone across Alameda County.
408 and 669 read as San Jose
San Jose carries both 408 and 669, and South Bay contacts often recognize either prefix on a caller ID before they pick up.
925 already sounds like Concord
925 is common on lines around Concord, so if your commute or family runs that direction, matching that code keeps your number feeling familiar to them.
Skip the robocall lists locals complain about
Unwanted sales calls and robocalls are a frequent complaint among Alameda County residents. A second number for online listings or dating profiles keeps that traffic off your main line.
Most popular Union City virtual phone numbers
| Area code | Serves | Get this area code |
|---|---|---|
| +1 510 | Oakland | Get a 510 number |
| +1 925 | Concord | Get a 925 number |
| +1 650 | San Mateo | Get a 650 number |
| +1 916 | Sacramento | Get a 916 number |
| +1 408 | San Jose | Get a 408 number |
| +1 669 | San Jose | Get a 669 number |
Local economy
Why do business in Union City?
Union City's economy is tied closely to the wider East Bay, with residents commuting to nearby cities for work in logistics, manufacturing, and healthcare.
Logistics and distribution
Warehouses and distribution centers along the corridor between Fremont and Hayward move goods throughout the East Bay and beyond.
Advanced manufacturing
Neighboring Fremont's manufacturing plants draw a steady share of workers who live in Union City and commute a short distance.
Healthcare and education
Hospitals and schools across Alameda County, from Hayward to Oakland, employ a large portion of the local workforce.
About Union City
Area codes in service
6
Population
66,196
Union City sits where several Bay Area area codes meet. 510 is shared with Oakland and Berkeley, 925 is common around Concord, 650 covers San Mateo, and 408 and 669 both run through San Jose, with 916 tied to Sacramento further north.
The region runs on Pacific time, and several of these codes overlay the same area rather than splitting it by geography, meaning more than one code can serve numbers in the same neighborhood.
Residents across Alameda County frequently report unwanted robocalls and sales calls to federal complaint trackers, which is one reason people keep a separate number for anything posted publicly, like a listing or dating profile.
Places near Union City
The closest place to Union City in the Census list is Hayward, 5 miles west. The largest nearby is San Jose (997,368 people), 24 miles southeast. 8 of the 8 places below also use the 510 area code: Hayward, Fairview, Newark, Cherryland, Castro Valley, San Lorenzo, Ashland and Fremont.
5 mi west · 158,440 people · area code 510, 650, 925, 916, 415, 628
5 mi north · 11,341 people · area code 510, 925, 650, 916, 408, 669
7 mi south · 46,254 people · area code 510, 650, 408, 669, 916, 925
7 mi northwest · 15,808 people · area code 510, 925, 650, 916, 415, 628
8 mi north · 66,441 people · area code 510, 925, 650, 916, 415, 628
8 mi northwest · 29,581 people · area code 510, 650, 925, 916, 415, 628
8 mi northwest · 23,823 people · area code 510, 925, 650, 916, 415, 628
9 mi southeast · 228,192 people · area code 510, 408, 669, 650, 925, 916
Distances are straight-line between Census place centers.
Frequently asked questions
How fast can I get a Union City phone number?
You pick your area code and get a working number in minutes, no store visit and no waiting on a carrier.
Which area code should I pick for a Union City number?
510 is the closest match to the East Bay cities around Union City, including Oakland and Berkeley. Some people choose 925, 650, 408, or 669 instead if they have ties to Concord, San Mateo, or San Jose.
Can I use a Union City number for selling online or dating apps?
Yes. Many people use a second number specifically to keep marketplace buyers or dating matches away from their main line, and to avoid adding their personal number to public lists.