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AS12025Iron Mountain Data Centers

United StatesRegistryARIN

As of 11th November 2026, AS12025 (Iron Mountain Data Centers), a network registered in the United States with ARIN, originates 143 IPv4 prefixes covering 193k addresses and 582 IPv6 prefixes. By IPv4 address space that makes it the 1,428th-largest of the 80,747 networks we see originating IPv4, and the 409th-largest of 18,752 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 92 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

582

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: 11 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…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS32590Valve Corporation

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

202

adjacent networks

Upstreams
73%
Peers
10351%
Downstreams
9246%

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

Upstreams of AS12025
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer23,977130
AS3356Lumen (Level 3)USPeer20,730107
AS1299Arelion (fka. Telia Carrier)SEPeer19,406123
AS174Cogent Communications, LLCUSPeer44655
AS8220COLTGBPeer26557
AS24482SG.GSSGPeer33
AS49544i3D.net B.VNLPeer11

Prefixes

All 725

The largest blocks AS12025 originates, widest first.

Largest prefixes originated by AS12025
PrefixAddressesVisibility
148.51.128.0/1732.8k76/76
72.44.192.0/1816.4k76/76
138.207.64.0/1816.4k76/76
174.128.0.0/1816.4k76/76
66.35.32.0/198.2k76/76
74.206.96.0/198.2k76/76
174.128.32.0/198.2k76/76
69.71.48.0/204.1k76/76
148.51.176.0/204.1k76/76
148.51.224.0/204.1k76/76

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

  • Valid16.1%117
  • Invalid0.0%0
  • No ROA83.9%608

Propagation

  • Globally propagated90% of full-feed peers or more99.7%723
  • Partially propagated40% to 90%0.1%1
  • Seen by few peersUnder 40%0.1%1

Prefix sizes

IPv4 — 143 prefixes

IPv6 — 582 prefixes

  • /324.3B × /640.5%3
  • /36268M × /640.7%4
  • /4016.8M × /642.6%15
  • /432.1M × /640.2%1
  • /4865.5k × /6496.0%559

Recent changes

Announcements that started or stopped since 12th Oct 2026.

  • Announced2605:3380:4b3a::/4810th Nov 2026
  • Withdrawn2605:3380:4459::/4828th Oct 2026
  • Withdrawn2605:3380:4543::/4828th Oct 2026
  • Announced2605:3380:4819::/4826th Oct 2026
  • Withdrawn2605:3380:4819::/4826th Oct 2026
  • Announced2605:3380:4117::/4820th Oct 2026
  • Withdrawn2605:3380:4117::/4819th Oct 2026

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