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Autonomous System

AS12025 · Iron Mountain Data Center

Overview

AS12025 is announced on the Internet: RIPE RIS route collectors currently see 143 IPv4 prefixes and 583 IPv6 prefixes originated by this network. Together, its IPv4 prefixes cover 128,256 addresses, with overlapping prefixes counted once. In the paths the collectors record, it has 6 upstream neighbours (transit providers or peers) and 91 downstream neighbours (customers or networks it carries). Its most visible upstreams are Zayo Bandwidth (AS6461), Arelion Sweden AB (AS1299), and Level 3 Parent, LLC (AS3356). AS12025 was assigned by ARIN, and its registration country is United States.

Source: RIPEstat (RIPE NCC), RIS route collectors. Read on October 17, 2026 at 3:13 AM UTC. This page is refreshed at most every 12 hours.

Go further

Trace a route to this networkOpen in the BGP viewerWHOIS of 148.51.128.1

The trace goes to 148.51.128.1, the first address of 148.51.128.0/17. 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 (143 prefixes)

PrefixAddresses
8.12.246.0/23512
8.30.192.0/212,048
8.30.198.0/24256
8.36.32.0/212,048
8.36.32.0/221,024
8.36.35.0/24256
8.36.36.0/221,024
8.36.36.0/24256
8.36.37.0/24256
50.59.152.0/23512
66.35.32.0/198,192
66.35.35.0/24256
69.71.48.0/204,096
72.22.108.0/24256
72.22.111.0/24256
72.44.192.0/1816,384
72.44.198.0/24256
72.44.216.0/23512
72.44.226.0/24256
72.44.243.0/24256
74.206.96.0/198,192
74.206.119.0/24256
74.206.122.0/23512
104.153.188.0/221,024
104.153.188.0/23512
104.153.190.0/24256
104.193.44.0/221,024
135.84.108.0/221,024
136.228.184.0/24256
138.207.64.0/1816,384
138.207.64.0/212,048
138.207.80.0/24256
138.207.81.0/24256
138.207.84.0/24256
138.207.85.0/24256
138.207.86.0/24256
148.51.128.0/1732,768
148.51.128.0/23512
148.51.130.0/23512
148.51.130.0/24256
148.51.133.0/24256
148.51.134.0/23512
148.51.136.0/24256
148.51.137.0/24256
148.51.138.0/24256
148.51.139.0/24256
148.51.140.0/24256
148.51.142.0/24256
148.51.143.0/24256
148.51.144.0/24256
148.51.145.0/24256
148.51.146.0/24256
148.51.154.0/24256
148.51.155.0/24256
148.51.176.0/204,096
148.51.176.0/24256
148.51.177.0/24256
148.51.192.0/23512
148.51.194.0/23512
148.51.196.0/23512
148.51.198.0/23512
148.51.200.0/23512
148.51.202.0/23512
148.51.204.0/23512
148.51.206.0/23512
148.51.206.0/24256
148.51.208.0/23512
148.51.209.0/24256
148.51.210.0/23512
148.51.211.0/24256
148.51.212.0/23512
148.51.214.0/23512
148.51.216.0/23512
148.51.218.0/23512
148.51.224.0/204,096
148.51.224.0/24256
148.51.225.0/24256
148.51.226.0/24256
148.51.227.0/24256
148.51.228.0/24256
148.51.229.0/24256
148.51.230.0/24256
148.51.231.0/24256
148.51.232.0/24256
148.51.233.0/24256
148.51.234.0/24256
148.51.235.0/24256
148.51.236.0/24256
148.51.237.0/24256
148.51.240.0/204,096
155.63.88.0/24256
162.223.160.0/221,024
162.223.161.0/24256
162.252.176.0/221,024
162.252.176.0/23512
162.252.178.0/24256
162.252.179.0/24256
165.140.254.0/23512
170.52.44.0/23512
173.195.80.0/221,024

Showing the first 100 of 143, in address order. Complete list on RIPEstat

IPv6 prefixes (583 prefixes)

Prefix
2605:3380::/32
2605:3380:2000::/36
2605:3380:2000::/48
2605:3380:4000::/36
2605:3380:4000::/40
2605:3380:4000::/48
2605:3380:4001::/48
2605:3380:4002::/48
2605:3380:4004::/48
2605:3380:4007::/48
2605:3380:4008::/48
2605:3380:4009::/48
2605:3380:400a::/48
2605:3380:400b::/48
2605:3380:400c::/48
2605:3380:400e::/48
2605:3380:4010::/48
2605:3380:4011::/48
2605:3380:4012::/48
2605:3380:4013::/48
2605:3380:4014::/48
2605:3380:4015::/48
2605:3380:4017::/48
2605:3380:4018::/48
2605:3380:4019::/48
2605:3380:401a::/48
2605:3380:401b::/48
2605:3380:401c::/48
2605:3380:401d::/48
2605:3380:401e::/48
2605:3380:402a::/48
2605:3380:402d::/48
2605:3380:402e::/48
2605:3380:4030::/48
2605:3380:4100::/40
2605:3380:4100::/48
2605:3380:4102::/48
2605:3380:4103::/48
2605:3380:4104::/48
2605:3380:4106::/48
2605:3380:4107::/48
2605:3380:410c::/48
2605:3380:410d::/48
2605:3380:410e::/48
2605:3380:4111::/48
2605:3380:4113::/48
2605:3380:4115::/48
2605:3380:4116::/48
2605:3380:4117::/48
2605:3380:4118::/48
2605:3380:4119::/48
2605:3380:411a::/48
2605:3380:411b::/48
2605:3380:411c::/48
2605:3380:411d::/48
2605:3380:411e::/48
2605:3380:411f::/48
2605:3380:4124::/48
2605:3380:4126::/48
2605:3380:4127::/48
2605:3380:4128::/48
2605:3380:4129::/48
2605:3380:412a::/48
2605:3380:412b::/48
2605:3380:412c::/48
2605:3380:412d::/48
2605:3380:412f::/48
2605:3380:4130::/48
2605:3380:4131::/48
2605:3380:4132::/48
2605:3380:4133::/48
2605:3380:4135::/48
2605:3380:4136::/48
2605:3380:4137::/48
2605:3380:4139::/48
2605:3380:413b::/48
2605:3380:413f::/48
2605:3380:4140::/48
2605:3380:4141::/48
2605:3380:4142::/48
2605:3380:4143::/48
2605:3380:4146::/48
2605:3380:4147::/48
2605:3380:4148::/48
2605:3380:4149::/48
2605:3380:414a::/48
2605:3380:414b::/48
2605:3380:414c::/48
2605:3380:4152::/48
2605:3380:4153::/48
2605:3380:4154::/48
2605:3380:4155::/48
2605:3380:4157::/48
2605:3380:4158::/48
2605:3380:4159::/48
2605:3380:415c::/48
2605:3380:4161::/48
2605:3380:4162::/48
2605:3380:4163::/48
2605:3380:4164::/48

Showing the first 100 of 583, in address order. Complete list on RIPEstat

Neighbours

Upstreams (transit or peers) (6)

ASNetworkVisibility
AS6461Zayo Bandwidth9,227
AS1299Arelion Sweden AB8,926
AS3356Level 3 Parent, LLC5,314
AS8220COLT Technology Services Group Limited317
AS174Cogent Communications, LLC218
AS24482SG.GS2

Downstreams (customers) (91)

ASNetworkVisibility
AS14532CBOSS INC851
AS21549Iron Mountain Inc596
AS402106ACDev LLC555
AS395130Day Pitney LLP448
AS18561EPAM Systems, Inc409
AS402618Trico408
AS398298Netstratum393
AS33307Hospitality Integrated Services Inc383
AS40289CGI TECHNOLOGIES AND SOLUTIONS INC.380
AS17073Allegis Group370
AS209622-356
AS7859-350
AS394149-343
AS14162-334
AS62669-288
AS17237-265
AS393836-264
AS63474Sirius Computer Solutions, Inc.263
AS16898-262
AS396368-262
AS399894-262
AS27292-261
AS31966-261
AS400783-261
AS14160-260
AS19472-260
AS26355-260
AS55226-260
AS8161-259
AS11765-259

The 30 most visible of 91.

1 more neighbour appears 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.