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Autonomous System

AS12338 · Euskaltel S.A.

Overview

AS12338 is announced on the Internet: RIPE RIS route collectors currently see 116 IPv4 prefixes and 22 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 579,072 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 5 upstream neighbours (transit providers or peers) and 20 downstream neighbours (customers or networks it carries). Its most visible upstreams are Cogent Communications, LLC (AS174), TATA COMMUNICATIONS (AMERICA) INC (AS6453), and XTRA TELECOM S.A. (AS15704). AS12338 was assigned by RIPE NCC, and its registration country is Spain.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 16, 2026 at 7:02 PM UTC. This page is refreshed at most every 12 hours.

Go further

The trace goes to 83.213.0.1, the first address of 83.213.0.0/16. An address picked inside a prefix may not answer (nothing listens there, or the network filters probes): the trace then shows the path up to the last network that replies.

Announced prefixes

IPv4 prefixes (116 prefixes)

PrefixAddresses
5.159.128.0/1816,384
5.159.128.0/212,048
5.159.136.0/212,048
5.159.144.0/212,048
5.159.152.0/212,048
5.159.160.0/212,048
5.159.168.0/212,048
5.159.168.0/221,024
5.159.172.0/221,024
5.159.176.0/23512
5.159.178.0/23512
5.159.180.0/23512
5.159.182.0/23512
5.159.184.0/23512
5.159.186.0/23512
5.159.188.0/23512
5.159.190.0/23512
37.218.0.0/1732,768
46.231.0.0/212,048
62.99.0.0/1732,768
81.9.128.0/1732,768
81.9.128.0/198,192
81.9.160.0/198,192
81.9.192.0/212,048
81.9.192.0/221,024
81.9.198.0/24256
81.9.202.0/23512
81.9.204.0/221,024
81.9.208.0/212,048
81.9.208.0/221,024
81.9.212.0/24256
81.9.216.0/23512
81.9.218.0/23512
81.9.220.0/221,024
81.9.248.0/212,048
82.130.128.0/1732,768
82.130.247.0/24256
82.130.248.0/24256
82.130.249.0/24256
83.213.0.0/1665,536
83.213.184.0/221,024
85.84.0.0/1665,536
85.85.0.0/1665,536
85.85.144.0/212,048
85.86.0.0/1665,536
85.87.0.0/1665,536
85.87.24.0/24256
85.87.25.0/24256
85.87.26.0/24256
85.87.27.0/24256
85.87.40.0/24256
85.87.41.0/24256
85.87.43.0/24256
85.87.64.0/221,024
85.87.68.0/24256
85.87.69.0/24256
85.87.70.0/24256
85.87.71.0/24256
85.87.72.0/221,024
85.87.84.0/221,024
85.87.96.0/221,024
85.87.100.0/221,024
85.87.124.0/221,024
85.87.192.0/24256
85.87.193.0/24256
85.87.194.0/24256
85.87.195.0/24256
85.87.196.0/24256
85.87.204.0/24256
85.152.104.0/221,024
85.152.124.0/221,024
91.116.0.0/1816,384
91.116.0.0/198,192
91.116.0.0/221,024
91.116.4.0/24256
91.116.16.0/204,096
91.116.32.0/212,048
91.116.32.0/221,024
91.116.36.0/24256
91.116.38.0/24256
91.116.40.0/221,024
91.116.44.0/221,024
91.116.48.0/212,048
91.116.56.0/212,048
178.60.64.0/1816,384
178.60.64.0/212,048
178.60.64.0/221,024
178.60.68.0/24256
178.60.69.0/24256
178.60.70.0/24256
178.60.71.0/24256
178.60.72.0/24256
178.60.73.0/24256
178.60.76.0/221,024
178.60.80.0/221,024
178.60.96.0/212,048
178.60.104.0/221,024
178.60.108.0/221,024
178.60.112.0/221,024
178.60.116.0/24256

Showing the first 100 of 116, in address order. Complete list on RIPEstat

IPv6 prefixes (22 prefixes)

Prefix
2a00:7b00::/29
2a00:7b00::/40
2a00:7b00:10::/48
2a00:7b00:11::/48
2a00:7b00:12::/48
2a00:7b00:13::/48
2a00:7b00:14::/48
2a00:7b00:16::/48
2a00:7b00:17::/48
2a00:7b00:18::/48
2a00:7b00:19::/48
2a00:7b00:c10::/48
2a00:7b00:b000::/40
2a00:7b00:c000::/40
2a00:7b00:d000::/40
2a00:7b00:d800::/40
2a00:7b00:e000::/40
2a00:7b00:e800::/40
2a00:7b00:ef00::/40
2a00:7b00:f000::/40
2a00:7b00:f800::/40
2a00:7b00:ff00::/40

Neighbours

Upstreams (transit or peers) (5)

ASNetworkVisibility
AS174Cogent Communications, LLC1,554
AS6453TATA COMMUNICATIONS (AMERICA) INC973
AS15704XTRA TELECOM S.A.971
AS8220COLT Technology Services Group Limited55
AS60068Datacamp Limited8

Downstreams (customers) (20)

ASNetworkVisibility
AS13195Ingenieria y Economia del Transporte, S.A366
AS15704XTRA TELECOM S.A.300
AS15711Iberdrola S.A.270
AS35700Bilbao Bizkaia Kutxa259
AS202765DATA CENTER EUSKADI SOCIEDAD LIMITADA258
AS39353Gobierno del Principado de Asturias255
AS212536Nexis Tecnologias de la Informacion, S.L253
AS48187ARABAKO FORU ALDUNDIA / DIPUTACION FORAL DE ALAVA220
AS21364Lantik S.A. M.P.72
AS200518EUSKAL KIROL APOSTUAK SOCIEDAD ANONIMA70
AS50335-44
AS12319-35
AS12946-12
AS12334-5
AS199474-5
AS43885-4
AS200165-4
AS64533-1
AS65000-1
AS216371-1

2 more neighbours appear on both sides of this network depending on the path, so they are counted in neither list.

Visibility is RIPEstat's count of how often the route collectors observed the link. It compares neighbours with each other; it is not a traffic volume.

How to read this page

An Autonomous System (AS) is a network run under one routing policy: an internet provider, a cloud, a content network, a university. Each one has a number, its ASN, assigned by a regional registry (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC), and uses BGP, the protocol networks use to tell each other where addresses are, to announce the blocks of addresses it delivers to.

A prefix such as 203.0.113.0/24 is a block of addresses: the number after the slash says how many bits are fixed, so a /24 holds 256 IPv4 addresses and a /16 holds 65,536. Networks often announce a large block and smaller pieces of it at the same time, which is why the address total counts each address once.

Neighbours come from the paths themselves. A network that appears just before this one in a path, on the collector's side, is an upstream: a transit provider or a peer. One that appears just after it is a downstream, usually a customer. Peering at an internet exchange also shows up as an upstream, so the upstream list is not a list of paid transit.

The data comes from RIPEstat, run by the RIPE NCC, which gathers the routing tables of hundreds of networks through its RIS route collectors. This page reads it when it is visited and keeps it for 12 hours at most; the BGP viewer reads it live.

Frequently asked questions

How do I find the ASN of an IP address?
Type the address in the BGP viewer: it shows the prefix that covers it, the AS that originates that prefix and the paths seen towards it. A traceroute also names the network of each hop, so you can see every AS a connection crosses.
Why does one company have several ASNs?
Large operators split their network by region, by activity or by history: a cloud may use one number for its backbone and another for a region, and every acquisition brings its own numbers. Each number has its own page, with its own prefixes and neighbours.
Why do prefix counts differ from one site to another?
Each source sees the routing table from different collectors, at a different time, and counts differently: some include prefixes withdrawn in recent weeks, some merge a block and its pieces. This page counts the prefixes RIPE RIS collectors see originated by the network at the end of the latest two-week window, and counts each IPv4 address once.
Is this the list of IP ranges of a cloud provider?
It is what its networks announce, which is what the Internet routes to them. Many providers also publish an official list of ranges per service and region; that list is the reference for firewall rules, because a range can be announced before it is used, or announced by another of their AS numbers.