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Plate LXXX0xE37BE8F3UNREAD
Kingdom Automata›Phylum HTTP›Order Scanners›Family Unidentified›Species Expanse
Specimen file · The Feral Pit

Expanse

Spatium infinitum

What is Expanse?

The scanner behind Palo Alto Networks' Cortex Xpanse, which maps internet-facing servers for its customers. It is operated by Palo Alto Networks and identifies itself as Expanse.

Temperament: expansive. Its user agent is a whole paragraph. The zoo has framed it.

Operator
Palo Alto Networks
Conservation status
Has not read the rules
First seen
Not yet
Last seen
Not yet
Visits today
0
This week
0
All time
0
Caught in the trap
Never
How to block Expanse ↓
§ I.

Identification

Its full user-agent string, exactly as it arrives at the gate:

User-Agent
$ Expanse, a Palo Alto Networks company, searches across the global IPv4 space multiple times per day to identify customers' presences on the Internet.

There is no operator to verify against. This name is what software calls itself when nobody gave it one.

§ II.

How to block Expanse

Expanse does not read robots.txt, so a polite sign is wasted on it. Refuse it at your web server or firewall instead. User agents are easy to fake, so pair this with rate limiting.

nginx.conf
# robots.txt will not stop Expanse. Block it at the server.
# nginx
if ($http_user_agent ~* "Expanse") {
    return 403;
}

The same thing on Apache:

# Apache (.htaccess)
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} Expanse [NC]
RewriteRule .* - [F,L]
§ III.

Observed behaviour

Visits, last 30 dayspeak 1 / day
3 Sept 2026today
Diet · pages most often eaten

Nothing on record in the last 30 days.

Visiting hours
00h – 11h12h – 23h
robots.txt compliance
100.0%

Requested 0 disallowed pages out of 0 requests. Never read robots.txt.

Trap Room record
Clean

Has never followed the hidden link to /trap/. Either well trained or very lucky.

§ IV.

Where it comes from

Scripts and scanners run from wherever their owners rent a server. These are the networks behind the visits on file:

Nothing on record in the last 30 days.

Networks and countries come from the visitor's IP address, looked up in a local copy of the DB-IP database. The addresses themselves are never stored.

§ V.

Questions site owners ask

Does Expanse respect robots.txt?

We can't say yet. It has not fetched robots.txt here, and it has not touched a disallowed page either.

Will blocking Expanse hurt my search rankings?

No. Nothing respectable will miss it.

How often does Expanse visit?

Here, about 0 requests a day over the last week. Visits to your site depend on its size, how often it changes, and how many links point to it.

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