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Area Code Detail

Area Code 400

North American numbering plan area

Reports, 30 Days 3

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

Reports, 180 Days 17

Broader complaint volume used to prioritize indexable pages.

Active Prefixes 8

Distinct NPA-NXX exchanges surfaced from routing and complaint 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

Search a phone number, area code, exchange, or short code

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.

Phone LookupTop ComplaintsArea CodesNPA-NXXiMessage
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.

NPA-NXX

Strongest exchanges inside area code 400

These prefixes combine recent complaint concentration with routing or assignment density, which makes them good candidates for indexing and exploration.

Prefix Complaint Score Routing Rows Companies Cities
400-500 8 0 0 0
400-282 4 0 0 0
400-472 4 0 0 0
400-800 4 0 0 0
400-831 4 0 0 0
400-900 4 0 0 0
400-908 4 0 0 0
400-933 4 0 0 0
Recent Signals

Latest complaint activity tied to 400

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

FTC report from Akron, OHIO

April 3, 2026 at 10:37 AM

This report was logged as a robocall. Violation date: March 27, 2026 at 1:12 PM.

FTC report from Wexford, PENNSYLVANIA

March 20, 2026 at 11:49 AM

This report was logged as a live voice. Violation date: March 19, 2026 at 3:49 PM.

FTC report from Daytojn, OHIO

March 9, 2026 at 5:29 PM

400-831-6377 was logged as a robocall. Category: Dropped call or no message. Violation date: March 9, 2026 at 2:15 PM.

FTC report from Akron, OHIO

March 4, 2026 at 9:43 AM

This report was logged as a robocall. Violation date: March 2, 2026 at 11:45 AM.

FTC report from PENNSYLVANIA

March 3, 2026 at 6:05 PM

This report was logged as a live voice. Category: Dropped call or no message. Violation date: March 3, 2026 at 11:22 AM.

FTC report from OHIO

March 2, 2026 at 5:26 PM

This report was logged as a unwanted call. Category: No Subject Provided. Violation date: March 2, 2026 at 6:00 PM.

FTC report from Richmond, VIRGINIA

February 12, 2026 at 11:12 AM

400-500-5678 was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: February 12, 2026 at 12:00 PM.

FTC report from Galveston, TEXAS

February 5, 2026 at 7:01 PM

400-800-0239 was logged as a robocall. Violation date: February 5, 2026 at 4:57 PM.

FTC report from Oklahoma, OKLAHOMA

February 5, 2026 at 5:12 PM

This report was logged as a live voice. Violation date: February 5, 2026 at 1:28 PM.

FTC report from South Amherst, OHIO

January 23, 2026 at 12:44 PM

This report was logged as a live voice. Violation date: January 21, 2026 at 12:00 PM.

FTC report from NORTH CAROLINA

January 22, 2026 at 12:27 PM

This report was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: January 22, 2026 at 11:50 AM.

FTC report from Plano, TEXAS

January 9, 2026 at 12:51 PM

400-500-0325 was logged as a robocall. Violation date: January 9, 2026 at 11:48 AM.

FTC report from Teaneck, NEW JERSEY

January 7, 2026 at 10:47 PM

400-472-3008 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: January 7, 2026 at 12:00 AM.

FTC report from Palm Coast, FLORIDA

December 16, 2025 at 6:16 AM

400-282-3671 was logged as a live voice. Violation date: December 15, 2025 at 3:38 PM.

FTC report from Slingerlands, NEW YORK

December 9, 2025 at 8:48 AM

400-908-4510 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: December 4, 2025 at 9:10 AM.

FTC report from Canutillo, TEXAS

November 21, 2025 at 2:22 PM

400-900-9531 was logged as a robocall. Violation date: November 21, 2025 at 12:15 PM.

FTC report from Parma, OHIO

November 17, 2025 at 12:01 PM

400-933-3568 was logged as a robocall. Violation date: November 15, 2025 at 5:59 PM.

FTC report from MICHIGAN

September 25, 2025 at 7:12 PM

400-342-5293 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 25, 2025 at 7:10 PM.

FTC report from WYOMING

September 24, 2025 at 3:25 PM

This report was logged as a live voice. Violation date: September 22, 2025 at 9:00 PM.

FTC report from Grand Rapids, MICHIGAN

September 19, 2025 at 4:37 PM

This report was logged as a live voice. Violation date: September 19, 2025 at 4:33 PM.

FTC report from TENNESSEE

September 12, 2025 at 5:18 PM

400-369-6995 was logged as a robocall. Violation date: September 12, 2025 at 5:04 AM.

FTC report from Lake Mary, FLORIDA

August 18, 2025 at 11:15 AM

This report was logged as a robocall. Category: Medical & prescriptions. Violation date: August 18, 2025 at 10:52 AM.

FTC report from Blairsville, GEORGIA

August 12, 2025 at 10:03 AM

This report was logged as a robocall. Violation date: August 12, 2025 at 9:52 AM.

FTC report from Woodville, TEXAS

August 8, 2025 at 11:01 PM

400-800-6864 was logged as a robocall. Violation date: August 6, 2025 at 5:55 PM.

FTC report from Clinton Twp, MICHIGAN

August 8, 2025 at 4:34 PM

This report was logged as a unwanted call. Violation date: August 8, 2025 at 4:09 PM.

FTC report from Hutchinson, KANSAS

July 16, 2025 at 7:09 PM

This report was logged as a robocall. Category: Calls pretending to be government, businesses, or family and friends. Violation date: March 27, 2025 at 2:22 PM.

FTC report from Dyer, INDIANA

July 16, 2025 at 2:25 PM

This report was logged as a robocall. Category: Dropped call or no message. Violation date: July 16, 2025 at 10:41 AM.

FTC report from Fayetteville, NORTH CAROLINA

July 7, 2025 at 4:39 PM

This report was logged as a robocall. Violation date: May 25, 2025 at 11:24 AM.

FTC report from OHIO

June 30, 2025 at 6:56 PM

400-657-5306 was logged as a live voice. Violation date: June 30, 2025 at 6:49 PM.

FTC report from Yuma, ARIZONA

June 9, 2025 at 8:32 AM

400-896-1607 was logged as a live voice. Violation date: June 8, 2025 at 3:09 PM.

FTC report from GEORGIA

May 29, 2025 at 5:39 PM

This report was logged as a robocall. Category: No Subject Provided. Violation date: May 29, 2025 at 3:43 PM.

FTC report from Karlstad, MINNESOTA

April 18, 2025 at 5:19 PM

This report was logged as a robocall. Category: Dropped call or no message. Violation date: April 17, 2025 at 8:59 AM.

FTC report from Bloomfield, NEW JERSEY

April 14, 2025 at 1:17 PM

This report was logged as a unwanted call. Violation date: April 14, 2025 at 12:18 PM.

FTC report from Buena Park, CALIFORNIA

March 26, 2025 at 6:35 PM

This report was logged as a live voice. Violation date: March 25, 2025 at 5:01 PM.

FTC report from Chamblee, GEORGIA

March 24, 2025 at 4:36 PM

This report was logged as a robocall. Category: Medical & prescriptions. Violation date: March 24, 2025 at 2:35 PM.

FTC report from Catonsville, MARYLAND

March 24, 2025 at 4:30 PM

This report was logged as a robocall. Category: Dropped call or no message. Violation date: March 24, 2025 at 1:00 PM.

FTC report from Lawrencceville, GEORGIA

March 20, 2025 at 1:18 PM

400-201-1356 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: March 19, 2025 at 2:17 PM.

FTC report from Mill Valley, CALIFORNIA

March 3, 2025 at 3:03 PM

400-345-6459 was logged as a robocall. Violation date: January 20, 2025 at 11:41 AM.

FTC report from El Prado, NEW MEXICO

February 26, 2025 at 12:47 PM

400-213-8369 was logged as a live voice. Violation date: February 13, 2025 at 12:00 AM.

FTC report from FLORIDA

February 25, 2025 at 12:18 PM

This report was logged as a live voice. Violation date: February 21, 2025 at 4:28 PM.