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Area Code Detail

Area Code 521

North American numbering plan area

Reports, 30 Days 4

Recent FCC and FTC complaint records tied to this area code.

Reports, 180 Days 13

Broader complaint volume used to prioritize indexable pages.

Active Prefixes 0

Distinct NPA-NXX prefixes surfaced from routing and assignment data.

Carriers / Assignees 0

Named carriers, assignees, or code holders found in routing data.

Cities / Rate Centers 0

Distinct cities or rate centers attached to this area code.

States / Territories 0

Coverage footprint visible from NANPA, pooled block, and Canada routing data.

North American Phone Intelligence

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Paste raw digits, a formatted phone number, an area code, an NPA-NXX block, or a short code. US and Canada phone lookups route automatically, and international iMessage checks are available separately.

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Examples: 206-739-5800, 206, 206-739, 48369
Overview

What this area code covers

Regional coverage varies across the NANP data sources on this site.

Recent Signals

Latest complaint activity tied to 521

Complaint pages are the strongest indexing opportunity for this site right now, especially for exact phone numbers and toll-free exchanges.

FTC report from FLORIDA

May 17, 2026 at 12:36 PM

521-531-3624 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: May 15, 2026 at 12:28 PM.

FTC report from Alabama, ALABAMA

May 8, 2026 at 6:20 PM

This report was logged as a live voice. Violation date: May 8, 2026 at 4:15 PM.

FTC report from Cloverdale, VIRGINIA

May 6, 2026 at 2:46 PM

521-427-7363 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: May 5, 2026 at 6:13 PM.

FTC report from St. Petersburg, FLORIDA

May 3, 2026 at 4:53 PM

521-269-3870 was logged as a unwanted call. Violation date: May 2, 2026 at 3:46 PM.

FTC report from Pleasant Hilll, CALIFORNIA

March 16, 2026 at 9:00 PM

This report was logged as a robocall. Category: Lotteries, prizes & sweepstakes. Violation date: March 16, 2026 at 12:53 PM.

FTC report from LOUISIANA

March 12, 2026 at 11:57 AM

521-667-2650 was logged as a robocall. Category: Dropped call or no message. Violation date: March 12, 2026 at 10:53 AM.

FTC report from Frederick, MARYLAND

March 5, 2026 at 9:09 AM

521-302-8244 was logged as a robocall. Violation date: March 4, 2026 at 1:02 PM.

FTC report from Frederick, MARYLAND

March 5, 2026 at 9:08 AM

521-302-8244 was logged as a robocall. Violation date: March 4, 2026 at 1:01 PM.

FTC report from Frederick, MARYLAND

March 5, 2026 at 9:08 AM

521-302-8244 was logged as a robocall. Violation date: March 4, 2026 at 1:01 PM.

FTC report from Pflugerville, TEXAS

January 5, 2026 at 11:35 AM

521-483-0691 was logged as a robocall. Violation date: January 3, 2026 at 4:55 PM.

FTC report from Wexford, PENNSYLVANIA

December 6, 2025 at 11:58 AM

This report was logged as a live voice. Category: Dropped call or no message. Violation date: December 5, 2025 at 3:15 PM.

FTC report from VIRGINIA

November 29, 2025 at 11:43 AM

521-371-3531 was logged as a robocall. Category: Dropped call or no message. Violation date: November 28, 2025 at 11:54 AM.

FTC report from Urbandale, IOWA

November 25, 2025 at 5:20 PM

This report was logged as a live voice. Violation date: November 24, 2025 at 1:11 PM.

FTC report from Jacksonville, NORTH CAROLINA

November 15, 2025 at 3:07 PM

521-476-9304 was logged as a unwanted call. Violation date: November 15, 2025 at 2:00 PM.

FTC report

September 22, 2025 at 3:22 AM

This report was logged as a robocall. Violation date: September 21, 2025 at 12:00 PM.

FTC report

September 22, 2025 at 3:22 AM

This report was logged as a robocall. Violation date: September 21, 2025 at 12:00 PM.

FTC report

September 22, 2025 at 3:21 AM

This report was logged as a robocall. Violation date: September 21, 2025 at 12:00 PM.

FTC report from Brooklyn, MICHIGAN

September 19, 2025 at 3:29 PM

This report was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: September 18, 2025 at 3:25 PM.

FTC report from CALIFORNIA

September 3, 2025 at 1:20 PM

This report was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 1, 2025 at 2:28 PM.

FTC report from Denver, COLORADO

June 17, 2025 at 12:56 PM

521-960-1170 was logged as a robocall. Violation date: June 6, 2025 at 2:40 PM.

FTC report from Gallitzin, PENNSYLVANIA

June 4, 2025 at 1:07 PM

521-697-1839 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: June 1, 2025 at 5:35 AM.

FTC report from Antioch, TENNESSEE

June 2, 2025 at 9:52 PM

This report was logged as a unwanted call. Category: No Subject Provided. Violation date: June 2, 2025 at 1:06 AM.

FTC report from Coweta, OKLAHOMA

May 14, 2025 at 2:22 PM

This report was logged as a live voice. Violation date: May 12, 2025 at 1:24 PM.

FTC report from Coweta, OKLAHOMA

May 14, 2025 at 2:19 PM

This report was logged as a live voice. Violation date: May 13, 2025 at 11:28 AM.

FTC report from Bakersfield, CALIFORNIA

April 16, 2025 at 4:40 PM

521-200-3818 was logged as a live voice. Category: No Subject Provided. Violation date: April 16, 2025 at 1:35 PM.

FTC report from New Braunfels, TEXAS

March 12, 2025 at 10:00 PM

This report was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: March 12, 2025 at 5:43 PM.

FTC report from Greer, SOUTH CAROLINA

February 12, 2025 at 1:37 PM

521-421-1215 was logged as a robocall. Violation date: February 12, 2025 at 10:17 AM.

FTC report from TEXAS

January 28, 2025 at 10:23 AM

521-213-0369 was logged as a live voice. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: January 28, 2025 at 9:15 AM.

FTC report from Visalia, CALIFORNIA

January 27, 2025 at 4:26 PM

This report was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: January 26, 2025 at 1:57 PM.

FTC report from Rockwall, TEXAS

December 13, 2024 at 1:17 PM

521-581-6011 was logged as a robocall. Violation date: December 13, 2024 at 11:08 AM.

FTC report from Gig Harbor, WASHINGTON

December 6, 2024 at 11:15 AM

521-592-8273 was logged as a live voice. Violation date: December 6, 2024 at 7:22 AM.

FTC report from TEXAS

November 20, 2024 at 4:22 PM

521-861-1181 was logged as a robocall. Category: No Subject Provided. Violation date: November 20, 2024 at 1:43 PM.

FTC report from St. Petersburg, FLORIDA

October 29, 2024 at 7:04 PM

521-336-9443 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: October 28, 2024 at 7:03 PM.

FTC report from Maryville, TENNESSEE

October 24, 2024 at 10:21 AM

This report was logged as a robocall. Violation date: October 24, 2024 at 8:23 AM.

FTC report from Shepherd, MONTANA

October 21, 2024 at 12:25 PM

This report was logged as a robocall. Category: Dropped call or no message. Violation date: October 14, 2024 at 3:11 PM.

FTC report from Akron, OHIO

October 7, 2024 at 9:25 AM

This report was logged as a robocall. Violation date: September 23, 2024 at 11:28 AM.

FTC report from COLORADO

September 30, 2024 at 3:25 PM

521-308-8000 was logged as a robocall. Violation date: September 30, 2024 at 1:16 PM.

FTC report from Austin, TEXAS

September 24, 2024 at 3:35 PM

521-957-9621 was logged as a robocall. Violation date: September 14, 2024 at 10:02 AM.

FTC report from ARIZONA

August 27, 2024 at 5:41 PM

521-520-8464 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: August 23, 2024 at 1:00 PM.

FTC report from Davison, MICHIGAN

August 19, 2024 at 5:09 PM

521-952-8906 was logged as a live voice. Category: Home improvement & cleaning. Violation date: August 15, 2024 at 3:22 PM.