subnet.im

AS36351IBM Cloud

United StatesRegistryARINTypeContent

As of 10th November 2026, AS36351 (IBM Cloud), a content network registered in the United States with ARIN, originates 343 IPv4 prefixes covering 3.8M addresses and 73 IPv6 prefixes. By IPv4 address space that makes it the 169th-largest of the 80,733 networks we see originating IPv4, and the 48th-largest of 18,751 in the United States. It is seen behind 78 upstream networks, most often AS2914 (NTT America, Inc.) and AS6939 (Hurricane Electric LLC), and in front of 13 downstream networks. 3% of its announcements have a valid RPKI ROA; 6 are RPKI-invalid. 97% of its routes reach at least 90% of full-feed peers, and 1 prefix is also originated by another network.

At a glance

IPv4 prefixes

343

IPv6 prefixes

73

IPv4 addresses

3.8M

IPv6 /64s

5.7B

Upstream graph

The networks AS36351 is seen behind, one and two hops out, drawn from real AS paths.

AS36351Toward the internet core
Upstream graph for AS36351: 11 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS36351IBM CloudThis networkAS2914NTT America, Inc.AS3356Lumen (Level 3)AS6939Hurricane Electri…AS32590Valve CorporationAS35280F5 Networks SARLAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS3549Lumen (fka. Globa…AS20130Depaul UniversityAS132337AxclusiveAS1299Arelion (fka. Tel…

Networks observed one and two hops upstream of AS36351 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

490

adjacent networks

Upstreams
7816%
Peers
39981%
Downstreams
133%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 78.

Upstreams of AS36351
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer2,47455
AS6939Hurricane Electric LLCUSPeer1,73233
AS3356Lumen (Level 3)USPeer1,68443
AS32590Valve CorporationUSPeer1,3997
AS35280F5 Networks SARLFRPeer1,3216
AS1299Arelion (fka. Telia Carrier)SEPeer1,29537
AS13030Init7 (Switzerland) Ltd.CHPeer1,0544
AS14537Continent 8 LLCUSPeer1,0504
AS49544i3D.net B.VNLPeer1,0494
AS9002RETN LimitedGBPeer1,0414

Prefixes

All 416

The largest blocks AS36351 originates, widest first.

Largest prefixes originated by AS36351
PrefixAddressesVisibility
174.120.0.0/14262k76/76
67.15.0.0/1665.5k76/76
74.86.0.0/1665.5k76/76
75.126.0.0/1665.5k76/76
119.81.0.0/1665.5k76/76
174.133.0.0/1665.5k76/76
66.98.128.0/1732.8k76/76
169.44.0.0/1732.8k76/76
169.44.128.0/1732.8k76/76
169.46.0.0/1732.8k76/76

Routing health

How AS36351'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

  • Valid3.1%13
  • Invalid1.4%6
  • No ROA95.4%397

Propagation

  • Globally propagated90% of full-feed peers or more97.4%405
  • Partially propagated40% to 90%0.2%1
  • Seen by few peersUnder 40%2.4%10

Prefix sizes

IPv4 — 343 prefixes

IPv6 — 73 prefixes

  • /324.3B × /641.4%1
  • /36268M × /642.7%2
  • /4016.8M × /6474.0%54
  • /4865.5k × /6420.5%15
  • /49 and longerAggregated1.4%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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