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AS12025Iron Mountain Data Centers

United StatesRegistryARIN

As of 26th September 2026, AS12025 (Iron Mountain Data Centers), a network registered in the United States with ARIN, originates 143 IPv4 prefixes covering 193k addresses and 586 IPv6 prefixes. By IPv4 address space that makes it the 1,402nd-largest of the 79,516 networks we see originating IPv4, and the 399th-largest of 18,424 in the United States. It is seen behind 7 upstream networks, most often AS6461 (Zayo Bandwidth) and AS3356 (Lumen (Level 3)), and in front of 90 downstream networks. 16% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

143

IPv6 prefixes

586

IPv4 addresses

193k

IPv6 /64s

14.2B

Upstream graph

The networks AS12025 is seen behind, one and two hops out, drawn from real AS paths.

AS12025Toward the internet core
Upstream graph for AS12025: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS12025Iron Mountain Dat…This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS8220COLTAS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS32590Valve CorporationAS15576NTS workspace AG

Networks observed one and two hops upstream of AS12025 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

198

adjacent networks

Upstreams
74%
Peers
10151%
Downstreams
9045%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS12025
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer24,733136
AS3356Lumen (Level 3)USPeer22,121112
AS1299Arelion (fka. Telia Carrier)SEPeer18,987129
AS174Cogent Communications, LLCUSPeer46058
AS8220COLTGBPeer26757
AS24482SG.GSSGPeer33
AS49544i3D.net B.VNLPeer11

Prefixes

All 729

The largest blocks AS12025 originates, widest first.

Largest prefixes originated by AS12025
PrefixAddressesVisibility
148.51.128.0/1732.8k81/81
72.44.192.0/1816.4k81/81
138.207.64.0/1816.4k81/81
174.128.0.0/1816.4k81/81
66.35.32.0/198.2k81/81
74.206.96.0/198.2k81/81
174.128.32.0/198.2k81/81
69.71.48.0/204.1k81/81
148.51.176.0/204.1k81/81
148.51.224.0/204.1k81/81

Routing health

How AS12025's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid16.0%117
  • Invalid0.0%0
  • No ROA84.0%612

Propagation

  • Globally propagated90% of full-feed peers or more99.9%728
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.1%1

Prefix sizes

IPv4 — 143 prefixes

IPv6 — 586 prefixes

  • /324.3B × /640.5%3
  • /36268M × /640.7%4
  • /4016.8M × /642.6%15
  • /432.1M × /640.2%1
  • /4865.5k × /6496.1%563

Recent changes

Announcements that started or stopped since 28th Aug 2026.

6 announced and 8 withdrawn in all; the most recent are shown.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.