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Port Authority

Port Authority is a free Android port scanner for discovering network hosts and viewing information about the device and other hosts.

Place
#9 of 26
Score
6.5
Port Authority's website

What Port Authority is

Port Authority is a free Android port scanner for discovering network hosts and viewing information about the device and other hosts. It can find hosts on a LAN, identify a public IP address, and scan TCP ports on LAN and WAN hosts using custom port ranges. Other tools include MAC address vendor detection, DNS record lookups, Wake-on-LAN for LAN hosts, and lightweight SSH and HTTP(S) service fingerprinting that can show server type and version. The maker says host discovery typically takes less than five seconds and describes scans as heavily threaded. The app has no ads or analytics trackers; the maker says it does not track, collect, or share data and needs limited permissions for network interaction. Public IP discovery uses the maker’s open source, stateless service. The project repository identifies the license as GPL-3.0. The Android app is listed as free, with a $4.99, paid once donation option that has the same features. Large port ranges combined with too many threads can cause out-of-memory crashes, so the maker recommends lowering the thread count. WAN scans are best effort because mobile carriers may shape traffic or terminate scan connections.

Good

  • Scans TCP ports on LAN and WAN hosts.
  • Supports custom port ranges.
  • Includes DNS lookups and Wake-on-LAN.
  • Maker says it does not track, collect, or share data.
  • Free app has no ads or analytics trackers.

Watch out

  • Large ranges with too many threads may cause crashes.
  • WAN scans may be affected by mobile carriers.

Who it suits

Port Authority suits Android users who need to discover LAN hosts, inspect TCP ports, or use its included network tools. It may also fit people who want a free scanner without ads or analytics trackers.

Verdict

Port Authority combines host discovery, port scanning, and several network utilities in a free Android app. Keep its scan limits in mind: large ranges can crash with too many threads, and WAN scans may be interrupted by carriers.

Plans and prices

From Port Authority's own pricing page, checked 9 Oct 2026.

All about pricing
PlanPriceWhat it gives you
FreeFreeAndroid app · no ads · open source
Donate$4.99, paid onceAndroid app · same features as free version

The facts

Each one read from Port Authority's own pages, with the date it was checked.

What it does

Host discovery
The app supports LAN host discovery and public IP discovery.checked 9 Oct 2026
License
The project repository identifies its license as GPL-3.0.checked 9 Oct 2026
Network tools
Features include MAC address vendor detection, DNS record lookups, and Wake-on-LAN for LAN hosts.checked 9 Oct 2026
Performance
The maker says host discovery typically takes less than five seconds and describes scans as heavily threaded.checked 9 Oct 2026
Permissions
The maker says the app requires very limited permissions because it only needs to interact with the network.checked 9 Oct 2026
Port scanning
It scans TCP ports on LAN and WAN hosts and supports custom port ranges.checked 9 Oct 2026
Privacy
The maker says the app does not track, collect, or share data and has no ads or analytics trackers.checked 9 Oct 2026
Public IP service
The app uses the maker’s open source, stateless service to determine the public IP address.checked 9 Oct 2026
Purpose
Port Authority is an Android port scanner that discovers network hosts and displays network information about the device and other hosts.checked 9 Oct 2026
Scan limits
The maker notes that scanning large port ranges with too many threads may cause out-of-memory crashes and recommends lowering the thread count.checked 9 Oct 2026
Service identification
The app provides lightweight SSH and HTTP(S) service fingerprinting, including server type and version.checked 9 Oct 2026
Support
The Google Play listing provides a support email of [email protected].checked 9 Oct 2026
WAN scanning
The maker says WAN scans are best effort and mobile carriers may shape traffic or terminate connections during port scans.checked 9 Oct 2026

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