---
name: "Zonemaster::ASNLookup"
section: "3pm"
platform: "linux"
package: "libzonemaster-perl"
version: "1.0.16-2.1"
release: "Debian 11 (Bullseye)"
platforms: ["linux"]
url: "https://new.carta.tech/Zonemaster::ASNLookup"
---

# Zonemaster::ASNLookup(3pm)

do lookups of ASNs for IP addresses

## NAME

Zonemaster::ASNLookup - do lookups of ASNs for IP addresses

## SYNOPSIS

```
   my ($asnref, $prefix) = Zonemaster::ASNLookup->get_with_prefix( '8.8.4.4' );
   my $asnref = Zonemaster::ASNLookup->get( '192.168.0.1' );
```

## FUNCTION

- get($addr)

  Takes a string (or a Net::IP object) with a single IP address, does a lookup in a Cymru-style DNS zone and returns a list of AS numbers for the address, if any can be found.

- get\_with\_prefix($addr)

  As **get()**, except it returns a list of a reference to a list with the AS numbers, and a Net::IP object representing the prefix of the AS.