858 Area Code
Covers San Diego and nearby communities in California.
(858) 555-0142Area code 858 map
Interactive coverage map for area code 858, centered on San Diego, California
32.9628, -117.0359
Open in OpenStreetMapArea code 858 coverage map — centered on San Diego. Shaded area shows the approximate reach around the primary city.
858 is the area code for San Diego and the surrounding part of California. It reaches roughly 1.4 million people across places such as San Diego, Poway and more. The region observes Pacific time, so a number like (858) 555-0142 is on that clock right now. On the ground it spans San Diego. It is not currently paired with an overlay code. Local calls inside the 858 area can generally be placed with ten digits, and you do not need a leading 1 for domestic calls. On this page you'll find a live local clock for San Diego, an interactive coverage map, the cities and counties 858 serves, its overlay and neighboring codes, and tips on spotting 858 spam calls.
Cities covered by 858
Cities & neighborhoods
- San Diego
- Poway
Nearby & overlay area codes
Overlay codes (same area)
These share 858’s geography — a number in either code can be on the same street.
858 has no overlay code right now.
Neighboring codes
Codes for adjacent regions and metros.
Is a call from 858 a scam?
Because 858 covers a dense metro around San Diego, it's a common source of both real business calls and spam. Legitimate 858 calls come from local businesses, offices and neighbors; scam calls in this region tend to imitate delivery services, banks and utilities. Remember that caller ID is trivially spoofed — a scammer anywhere can make a 858 number appear on your screen — so the area code alone never proves a call is genuinely local.
Red flags to watch for
- Pressure to act right now, or threats of arrest, fines, or service being cut off.
- Requests to pay with gift cards, wire transfer, crypto, or a payment app.
- Asking for passwords, one-time codes, your SSN, or full card/bank numbers.
- A robocall or recording, or a number that won’t let you call back.
When unsure, hang up and call the organization back on a number you look up yourself.
Calling a 858 number from abroad
Every 858 number is a US/Canada +1 number. From a mobile anywhere, the simplest approach is to dial it in international format:
+1 858 555-0142If your phone can’t dial the +, replace it with your country’s exit code, then 1, then the number:
- UK, Germany, France & most of Europe
00 1 858 555-0142 - Australia
0011 1 858 555-0142 - Japan
010 1 858 555-0142 - Mexico
00 1 858 555-0142
Within the US and Canada you don’t need any of this — just dial the ten digits 858 555-0142.
Reverse phone lookup
Check any US or Canada number to see whether it's a working line, which carrier it sits on, whether it's mobile, landline or VoIP, and roughly where it's registered.
Shows carrier, line type and location. Owner name isn't available here.
Results are for personal, informational use only and may not be used for employment, credit, housing or tenant-screening decisions.
Area code 858: frequently asked questions
Where is the 858 area code located?
The 858 area code is located in California, centered on San Diego. It covers San Diego and nearby communities including San Diego, Poway.
What time zone is 858 in?
Area code 858 is in the Pacific time zone (UTC-8 (PST) / UTC-7 (PDT)). You can see the exact current local time for San Diego on the live clock above.
What cities use area code 858?
Cities and areas that use 858 include San Diego, Poway. Its primary city is San Diego, CA.
Do I need to dial 1 before 858?
You generally do not need to dial a leading 1 for domestic calls to 858. Ten-digit dialing (the 858 code plus the seven-digit number) is the safest habit.
Is 858 a toll-free or scam number?
No — 858 is a normal geographic area code for San Diego, not a toll-free code (toll-free codes are 800, 833, 844, 855, 866, 877 and 888). A 858 number is not inherently a scam, but the code can be spoofed. See the spam-call section above for how to tell.
What are the overlay area codes for 858?
Area code 858 does not currently have an overlay code; it is not layered on top of another code in the same area.