onesixtyone
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onesixtyone is a fast SNMPSNMPA UDP-based protocol for querying and managing network devices, standardized by the IETF. Cyber tools use it to pull interface stats, topology data, and device state from routers, switches, and servers at scale. scanner that sends requests to multiple IP addresses, trying different community strings and logging responses.
Summary
onesixtyone is an open-source command-line SNMP scanner that sends requests to many IP addresses in parallel, trying different community strings to find SNMP-enabled devices. Instead of waiting for a timeout on every non-responding host, it fires requests as fast as the network allows and logs replies as they arrive, similar to an Nmap ping sweep, which lets it cover a class B network in minutes rather than hours. It's aimed at penetration testers and network auditors who need to enumerate SNMP devices quickly across large address ranges. It sits in the reconnaissance space alongside other UDPUDPA network protocol that sends individual messages without guaranteeing delivery or order. Applications trade built-in reliability for less overhead and can add their own recovery.-based network scanners, doing one narrow job rather than general port scanning. Maintained by Trail of Bits, it dates back to 2014 with 18 contributors, though there have been no commits in the past year.
onesixtyone is a fast SNMP scanner that sends requests to multiple IP addresses, trying different community strings and logging responses.
How onesixtyone helps
Which devices on this network still have SNMP exposed with a guessable community string?
sends the system description request across the address range using a list of community strings and logs every host that replies along with the string that worked
Which SNMP-enabled devices are sitting on this address range right now?
fires requests at every address in the range without waiting on a per-host timeout, so responding devices are logged as their replies arrive rather than in scan order
What operating system and hardware is running behind a given SNMP-enabled address?
reads back the system description value returned in the reply, which typically names the software, OS build, and sometimes the hardware model
Which subnets or netmasked ranges have live SNMP responders?
accepts a subnet or netmask as the target and expands it to the individual addresses it probes
Languages
Command line
| option | found in | since | description |
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Values are placeholders taken from each option’s declared default. Nothing is executed here — the output shown is a recording of a run that already happened.
Release-note detail over time
See how much detail onesixtyone puts in its release notes, quarter by quarter, and compare it with tracked tools in the same category. This history uses up to ten retained, reviewed notes per tool; sparse or blank older quarters may reflect that limit.
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Releases
Nothing shipped since we started watching. Releases and docs updates land here as they happen.
Project health
Issue, contributor and maintainer activity in trailofbits/onesixtyone, 2023-10 – 2026-09, as of 2026-09-25. Twelve-month figures first; the trend lines run the whole window.
- Contributors 0 ±0 vs prior 12 months
- Maintainers 0 +0 joined · −0 left, last 12 months
- Bus factor 0 committers behind half the commits
- Community-filed not measured of issues opened, last 12 months
- Median time to close not measured issues closed, last 12 months
- Open backlog 4 of 14 issues ever filed
- Issues opened / month 0 · 0 communitymaintainers
- Open backlog 4
- Contributors / month 0
- Commits / month 0
- Stars 732
Counts from the project's public repository and git history; no individuals are identified. Maintainers are the committers covering 80% of the last year's commits. how we measure this
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