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Pwhois

Answers whois-style queries with the most specific live BGP route for an IP address, showing origin AS and AS path.
For developersOpen source
pwhois.org ↗
Open pwhois.orgAlternativesSet it up for my team
Pwhois: data, price, alternatives
  • Is it safe? We have not read the data policy of Pwhois yet. Read it on the official site before you upload anything.pwhois.org ↗
  • Is it free? We have not read the prices of Pwhois yet; they are next in our queue. Until then, the official site has them.pwhois.org ↗
  • What else does this? We have not measured alternatives for this one yet. If you know one, add it below.See ↓
At a glancechecked Oct 26, 2026

not read yet

Use

For
Network engineers who need to see which autonomous system is routing traffic to an IP address or prefix.
How it runs
CLI
Used for
  • Look up the autonomous system announcing an IP address
  • Map the networks that carry routes to a prefix
  • Check when a prefix first appeared in the routing table
Worth knowingcomputed from what we read · each with its source

Not it? Say what you need

beta

Three tools from the Atlas for the job you describe, each with what fits and what does not.

From people who use itnot part of the reading

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Questions this page answers
  • What is Pwhois?

    Answers whois-style queries with the most specific live BGP route for an IP address, showing origin AS and AS path.

  • Who is Pwhois for?

    Network engineers who need to see which autonomous system is routing traffic to an IP address or prefix.

  • Do people use Pwhois?

    Little sign of use.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk