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Area Code Detail

Area Code 621

Texas (Houston). Approved to overlay 281, 346, 713, and 832 · In service since January 3, 2025[13]

TX
Reports, 30 Days 1

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

Reports, 180 Days 5

Broader complaint volume used to prioritize indexable pages.

Active Prefixes 18

Distinct NPA-NXX exchanges surfaced from routing and complaint data.

Carriers / Assignees 1

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 1

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

Texas (Houston). Approved to overlay 281, 346, 713, and 832

Top carriers and assignees

  • MULTIPLE OCN LISTING · 14 routing rows
NPA-NXX

Strongest exchanges inside area code 621

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
621-528 4 0 0 0
621-681 4 0 0 0
621-806 4 0 0 0
621-973 4 0 0 0
621-211 0 1 1 0
621-311 0 1 1 0
621-411 0 1 1 0
621-511 0 1 1 0
621-555 0 1 1 0
621-611 0 1 1 0
621-700 0 1 1 0
621-711 0 1 1 0
621-811 0 1 1 0
621-911 0 1 1 0
621-950 0 1 1 0
621-958 0 1 1 0
621-959 0 1 1 0
621-976 0 1 1 0
Recent Signals

Latest complaint activity tied to 621

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

FTC report from CALIFORNIA

March 24, 2026 at 7:53 PM

621-973-9780 was logged as a robocall. Violation date: March 24, 2026 at 3:49 PM.

FTC report from Johnstown, PENNSYLVANIA

March 21, 2026 at 12:49 AM

621-528-3657 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: March 20, 2026 at 1:13 PM.

FTC report from Akron, OHIO

February 11, 2026 at 12:24 PM

This report was logged as a robocall. Violation date: February 3, 2026 at 9:36 AM.

FTC report from Culver City, CALIFORNIA

February 5, 2026 at 8:27 PM

621-681-1735 was logged as a robocall. Violation date: February 5, 2026 at 12:44 PM.

FTC report from TENNESSEE

December 28, 2025 at 1:10 PM

621-806-0561 was logged as a robocall. Violation date: November 6, 2025 at 11:28 AM.

FTC report from Harshaw, WISCONSIN

September 25, 2025 at 9:35 AM

621-762-0126 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: September 23, 2025 at 5:40 PM.

FTC report from Douglasville, GEORGIA

September 17, 2025 at 2:24 PM

621-222-9699 was logged as a live voice. Violation date: September 17, 2025 at 11:22 AM.

FTC report from Douglasville, GEORGIA

September 17, 2025 at 2:19 PM

621-222-9699 was logged as a live voice. Violation date: September 17, 2025 at 11:22 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:56 PM

621-000-8646 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:55 PM

621-000-7624 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:54 PM

621-000-7328 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:54 PM

621-000-7192 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:53 PM

621-000-5539 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:53 PM

621-000-4573 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:52 PM

621-000-3146 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:51 PM

621-000-3017 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from NORTH CAROLINA

September 15, 2025 at 1:51 PM

621-000-1758 was logged as a live voice. Category: No Subject Provided. Violation date: August 14, 2025 at 9:00 AM.

FTC report from Makawao, HAWAII

September 3, 2025 at 10:09 PM

This report was logged as a robocall. Category: No Subject Provided. Violation date: September 3, 2025 at 11:15 AM.

FTC report from East Northport, NEW YORK

July 1, 2025 at 11:44 AM

621-382-0890 was logged as a live voice. Category: Home improvement & cleaning. Violation date: June 30, 2025 at 12:05 PM.

FTC report from NEW YORK

June 26, 2025 at 4:50 PM

621-318-3616 was logged as a robocall. Violation date: June 25, 2025 at 4:48 PM.

FTC report from Reno, NEVADA

June 21, 2025 at 9:46 PM

This report was logged as a unwanted call. Category: Dropped call or no message. Violation date: June 21, 2025 at 5:22 PM.

FTC report from Eau Claire, WISCONSIN

May 9, 2025 at 6:02 PM

This report was logged as a robocall. Category: Dropped call or no message. Violation date: May 9, 2025 at 4:58 PM.

FTC report from INDIANA

March 6, 2025 at 7:24 PM

This report was logged as a robocall. Violation date: March 6, 2025 at 5:39 PM.

FTC report from CALIFORNIA

February 28, 2025 at 4:50 PM

621-717-0715 was logged as a robocall. Category: Reducing your debt (credit cards, mortgage, student loans). Violation date: February 27, 2025 at 3:56 PM.

FTC report from INDIANA

February 27, 2025 at 7:31 PM

This report was logged as a robocall. Violation date: February 27, 2025 at 5:35 PM.

FTC report from TENNESSEE

February 7, 2025 at 11:13 AM

This report was logged as a live voice. Category: Calls pretending to be government, businesses, or family and friends. Violation date: February 7, 2025 at 9:10 AM.

FTC report from Dix Hills, NEW YORK

January 29, 2025 at 5:15 PM

621-213-7139 was logged as a robocall. Category: Medical & prescriptions. Violation date: January 29, 2025 at 2:07 PM.

FTC report from TEXAS

January 22, 2025 at 9:41 PM

621-772-9722 was logged as a robocall. Category: No Subject Provided. Violation date: January 1, 2025 at 12:00 AM.

FTC report from Mesa, ARIZONA

January 14, 2025 at 1:35 PM

This report was logged as a live voice. Violation date: January 7, 2025 at 7:09 AM.

FTC report from Riverview, FLORIDA

January 8, 2025 at 10:48 AM

621-240-1895 was logged as a robocall. Category: No Subject Provided. Violation date: January 8, 2025 at 10:44 AM.

FTC report from TENNESSEE

October 29, 2024 at 11:59 AM

This report was logged as a unwanted call. Violation date: October 29, 2024 at 9:41 AM.

FTC report from Grand Terrace, CALIFORNIA

August 9, 2024 at 2:11 PM

This report was logged as a live voice. Violation date: August 8, 2024 at 9:55 AM.

FTC report from Mckeers Rocks, PENNSYLVANIA

August 9, 2024 at 11:27 AM

621-435-9439 was logged as a robocall. Category: Medical & prescriptions. Violation date: July 25, 2024 at 12:37 PM.

FTC report from East Islip, NEW YORK

July 29, 2024 at 2:49 PM

621-277-0608 was logged as a robocall. Violation date: July 29, 2024 at 12:00 AM.

FTC report from East Islip, NEW YORK

June 21, 2024 at 7:54 PM

This report was logged as a robocall. Category: Dropped call or no message. Violation date: June 14, 2024 at 4:00 PM.

FTC report from San Diego, CALIFORNIA

May 27, 2024 at 6:08 PM

This report was logged as a robocall. Violation date: May 27, 2024 at 3:01 PM.

FTC report from Sant Boi, TEXAS

February 23, 2024 at 5:46 AM

This report was logged as a robocall. Violation date: February 23, 2024 at 11:15 AM.

FTC report from WYOMING

February 20, 2024 at 2:21 PM

This report was logged as a robocall. Category: Dropped call or no message. Violation date: February 6, 2024 at 8:17 AM.

FTC report from WYOMING

February 20, 2024 at 2:18 PM

This report was logged as a robocall. Category: Dropped call or no message. Violation date: February 16, 2024 at 9:19 AM.

FTC report from Pleasant Hill Public, CALIFORNIA

January 31, 2024 at 8:47 PM

This report was logged as a robocall. Violation date: January 31, 2024 at 8:10 AM.

Routing

Detailed routing and assignment data

This table merges NANPA, pooled block, and Canadian assignment sources where available.

Prefix Block Carrier / Assignee Rate Center City State Use Type Assign Date
621-211 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-311 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-411 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-511 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-555 XXXX MULTIPLE OCN LISTING DIR ASST TX UA
621-611 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-700 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-711 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-811 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-911 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-950 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-958 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-959 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA
621-976 XXXX MULTIPLE OCN LISTING XXXXXXXXXX TX UA