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.Dd March 24, 2022
.Dt WHOIS.JORDAN.IM 7
.Os "Alpine Linux"
.
.Sh NAME
.Nm asn
.Nd map hosts to their corresponding ASN over the WHOIS protocol
.Sh DESCRIPTION
.Lk https://git.jordan.im/asn "asn(1)"
is a WHOIS server which provides BGP announcement information sourced from
a local database cache generated using the
.Lk https://location.ipfire.org/ "IPFIRE"
dataset.
.Pp
.Sy whois.jordan.im
is a public
.Nm
instance for personal use.
.
.Sh USAGE
.
.Pp
.Lk https://man.openbsd.org/whois.1 "whois(1)"
can be used to communicate with the server using
.Ar --host
and
.Ar --port
arguments. Both hostnames and IP address are accepted.
.
.Bd -literal -offset indent
$ whois -h whois.jordan.im google.com
AS Number | Country | AS Name | Announcement
----------+---------+---------+--------------------
15169 | US | GOOGLE | 142.250.0.0/15
15169 | IE | GOOGLE | 2a00:1450:4009::/48
$ whois -h whois.jordan.im 1.1.1.1
AS Number | Country | AS Name | Announcement
----------+---------+---------------+-------------
13335 | AU | CLOUDFLARENET | 1.1.1.0/24
.Ed
.
.Pp
If a hostname is provided, queries for each resolved A/AAAA record will be
returned. The dataset is regenerated daily to ensure response accuracy.
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