HackerTarget TCP Port Scan

What HackerTarget TCP Port Scan is

HackerTarget TCP Port Scan checks an IPv4 or IPv6 address for common open ports. It is intended to help assess the status of an internet-facing service or firewall. The free scan checks ports 21, 22, 23, 25, 80, 110, 143, 443, 445, and 3389. It uses Nmap, with version detection disabled. For wider coverage, HackerTarget’s advanced online scanner can scan an IP address or range across all 65,535 ports.

The service is available on the web and through an API. A beta TCP scan API returns port status as plain text and can be called with curl or other HTTP-based tools or software. Without full membership, that API is limited to 50 queries per day; membership removes limits and CAPTCHA. HackerTarget lists scheduled scans and API access, and offers plain text as an export format. Its IP and DNS tools also have listed Splunk and Maltego integrations and an official Chrome extension.

A free plan is available, with paid plans from $10/mo billed annually. The Starter plan lists 64 Nmap IPs per day, 16 OpenVAS IPs per day, 16 standard scans per day, and 500 Tools API calls per day. HackerTarget says active scans should target only systems the user has permission to scan. It also says vulnerability scan results are stored securely for up to 12 months, may be accessed by internal staff for troubleshooting, and are not sold, shared, or published.

Who it suits

This scan suits systems administrators, website owners, and security professionals checking internet-facing services or firewalls. The free common-port scan offers a focused check, while the advanced scanner can cover an address or range across all 65,535 ports.

Limits

The free scan checks ports 21, 22, 23, 25, 80, 110, 143, 443, 445, and 3389. Without full membership, the TCP scan API is capped at 50 queries per day. The Starter plan lists 64 Nmap IPs, 16 OpenVAS IPs, 16 standard scans, and 500 Tools API calls per day.

Getting started

1. Open the TCP Port Scan page.
2. Enter an IPv4 or IPv6 address for the free common-port scan.
3. Use the advanced online scanner to scan an address or range across all 65,535 ports, if broader coverage is needed.
4. Call the beta TCP scan API with curl or another HTTP-based tool or software, if using the API.
5. Choose a paid membership to remove scan limits and CAPTCHA, if needed.

Verdict

Choose HackerTarget TCP Port Scan for a web based check of common open ports, or use its advanced scanner when you need broader port coverage. The free scan is limited to ten ports, and the TCP scan API has a 50 query daily limit without full membership. Paid plans start at $10/mo billed annually.