zmap/zmap

Health v2 · maintenance only

Adoption not part of the score

6366 stars · 986 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

ZMap is a fast, stateless single-packet network scanner written in C, designed for Internet-wide network surveys such as scanning the entire IPv4 address space on one port in under 45 minutes. It supports TCP SYN, ICMP, DNS, UPnP, BACNET, and UDP probe modules, and pairs with ZGrab2 for stateful application-layer scans.

Use cases

• scan the entire IPv4 address space on a single port
• find hosts running a specific service like SMTP on port 25
• perform Internet-wide network security surveys
• measure adoption of protocols or services across the public Internet
• quickly identify open ports across large IP ranges
• research Internet measurement at scale

When to choose

• you need to scan millions of IPs quickly on a single port
• you are doing Internet-wide research or measurement studies
• you want a stateless scanner that maximizes scan throughput
• you plan to pair fast discovery with ZGrab2 for banner grabs or handshakes

When to avoid

• you need stateful application-layer interactions like banner grabbing or TLS handshakes (use ZGrab2)
• you only need to scan a small internal network (nmap is more appropriate)
• you cannot operate within ethical and legal scanning constraints

Facets

cli-tool · maturity active

security networking penetration-testing cli security networking developer-tools bsd cli port-scanner internet-scanning network-survey internet-measurement single-packet-scanner research linux macos

Member repositories

For agents

markdown · JSON · MCP: product_card(name="zmap/zmap")