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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
$ whois -h whois.jordan.im google.com
IP Address | AS Number | Country | AS Name | Announcement
-------------------------+-----------+---------+---------+--------------------
216.58.212.238 | 15169 | US | GOOGLE | 216.58.212.0/24
2a00:1450:4009:80b::200e | 15169 | IE | GOOGLE | 2a00:1450:4009::/48
$ whois -h whois.jordan.im 1.1.1.1
IP Address | AS Number | Country | AS Name | Announcement
-----------+-----------+---------+---------------+-------------
1.1.1.1 | 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.
An instance of the
.Nm
HTTP component is hosted at
.Lk https://ip.jordan.im/ ip.jordan.im
which provides the requesting address's autonomous system information over HTTP
via JSON.
.
.Bd -literal
$ curl ip.jordan.im
{
"host": "45.83.89.132",
"hostname": "45-83-89-132.pool.ovpn.com",
"org": "AS9009 M247 Europe SRL",
"announcement": "45.83.89.0/24"
}
.Ed
.
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