- AS112 Anycast Node

Welcome to this AS112 Anycast Node at Massar's Network (AS57777).


The following abstract from RFC7534 describes the purpose of this node:

   Many sites connected to the Internet make use of IPv4 addresses that
   are not globally unique.  Examples are the addresses designated in
   RFC 1918 for private use within individual sites.

   Devices in such environments may occasionally originate Domain Name
   System (DNS) queries (so-called "reverse lookups") corresponding to
   those private-use addresses.  Since the addresses concerned have only
   local significance, it is good practice for site administrators to
   ensure that such queries are answered locally.  However, it is not
   uncommon for such queries to follow the normal delegation path in the
   public DNS instead of being answered within the site.

   It is not possible for public DNS servers to give useful answers to
   such queries.  In addition, due to the wide deployment of private-use
   addresses and the continuing growth of the Internet, the volume of
   such queries is large and growing.  The AS112 project aims to provide
   a distributed sink for such queries in order to reduce the load on
   the corresponding authoritative servers.  The AS112 project is named
   after the Autonomous System Number (ASN) that was assigned to it.

   This document describes the steps required to install a new AS112
   node and offers advice relating to such a node's operation.

Prefixes announced by this node

The following prefixes are announced from AS112 by this node as per RFC7534:

IPv4 PrefixIPv6 PrefixHosts + +

This AS112 node is announced from behind AS57777 and thus any peer of AS57777 can automatically use it if BGP path selection wins.

What AS112 Anycast Node does my host use?

One can determine which AS112 node a host is reaching with a dig command like:

$ dig txt

; <<>> DiG <<>> txt
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26890
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1

; EDNS: version: 0, flags:; udp: 1232

;; ANSWER SECTION:	300	IN	TXT	"See for more information."	300	IN	TXT	"Massar's Network" "Zurich, CH"	300	IN	TXT	"Unique IP:"	300	IN	TXT	"Unique IP: 2a10:fc42:b::78"

;; Query time: 0 msec
;; MSG SIZE  rcvd: 224

$ dig +noall +answer loc	183	IN	LOC	47 22 34.000 N 8 29 21.000 E 0.00m 1m 10000m 10m


Live Usage Statistics are forthcoming.