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424 Area Code — Scam Calls, Location & Who's Calling

Area code 424 serves California in the Pacific time zone, in service since 2006. The FCC has 2,484 unwanted-call complaints against 1,683 different 424 numbers on record. Look up the exact number that called you below.

Most-reported 424 numbers

Ranked by FCC unwanted-call complaints. Click a number for its full report.

424 unwanted-call complaints, last 12 months

Monthly FCC complaint volume against 424 numbers. Spikes usually mark an active robocall campaign cycling through the code.

Carriers operating in 424

Carriers assigned to 424 prefixes that visitors have looked up so far — resolved from official NPA-NXX assignment records.

  • ONVOY, LLC - CAC · 18 prefixes
  • LEVEL 3 COMMUNICATIONS, LLC - CAC · 12 prefixes
  • T-MOBILE USA, INC.Wireless · 11 prefixes
  • BANDWIDTH.COM CLEC, LLC - CAC · 7 prefixes
  • CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CAWireless · 6 prefixes
  • NEW CINGULAR WIRELESS PCS, LLCWireless · 5 prefixes
  • MCIMETRO ACCESS TRANSMISSION SERVICES LLCC · 4 prefixes
  • METROPCS NETWORKS, LLCC · 3 prefixes

About area code 424

Serves
California
Time zone
Pacific
In service since
2006-08-26
Overlay
Yes — 10-digit dialing

Source: NANPA numbering records, refreshed weekly.

Spam calls from 424? What to know

Seeing repeated missed calls from 424 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in California — spoofing software displays whatever digits the campaign chooses. Never call unknown numbers back; look them up first, and report unwanted calls to the FCC to build the public record.

Area code 424 FAQs

Where is area code 424?

Area code 424 serves California, in the Pacific time zone. It is part of an overlay complex, so multiple area codes serve the same territory and 10-digit dialing is required. It has been in service since 2006.

Why do I keep getting calls from 424 numbers?

Robocallers use "neighbor spoofing" — displaying a number with a local area code to make you more likely to answer. A call showing area code 424 may not originate from California at all. Look up the full 10-digit number on this site to see its complaint history before calling back.

Are 424 numbers safe to call back?

Area codes themselves are neither safe nor unsafe — 424 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 2,484 unwanted-call complaints against 1,683 distinct 424 numbers in our current data window. Check the specific number's report page before returning a missed call.