subnet.im

AS36351IBM Cloud

United StatesRegistryARINTypeContent

As of 26th September 2026, AS36351 (IBM Cloud), a content network registered in the United States with ARIN, originates 340 IPv4 prefixes covering 3.8M addresses and 73 IPv6 prefixes. By IPv4 address space that makes it the 168th-largest of the 79,516 networks we see originating IPv4, and the 48th-largest of 18,424 in the United States. It is seen behind 78 upstream networks, most often AS2914 (NTT America, Inc.) and AS3356 (Lumen (Level 3)), and in front of 13 downstream networks. 3% of its announcements have a valid RPKI ROA; 9 are RPKI-invalid. 98% 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

340

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: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS36351IBM CloudThis networkAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS6939Hurricane Electri…AS32590Valve CorporationAS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3130RGnet OUAS49544i3D.net B.VAS3549Lumen (fka. Globa…AS18106Viewqwest Pte LtdAS20130Depaul University

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

496

adjacent networks

Upstreams
7816%
Peers
40582%
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.USPeer2,52559
AS3356Lumen (Level 3)USPeer1,99740
AS6939Hurricane Electric LLCUSPeer1,70833
AS32590Valve CorporationUSPeer1,4167
AS1299Arelion (fka. Telia Carrier)SEPeer1,36042
AS35280F5 Networks SARLFRPeer1,3316
AS9498Bharti Airtel Ltd.INPeer1,08178
AS14537Continent 8 LLCUSPeer1,0644
AS13030Init7 (Switzerland) Ltd.CHPeer1,0624
AS12956Telxius (Telefonica Global)ESPeer1,05811

Prefixes

All 413

The largest blocks AS36351 originates, widest first.

Largest prefixes originated by AS36351
PrefixAddressesVisibility
174.120.0.0/14262k81/81
67.15.0.0/1665.5k81/81
74.86.0.0/1665.5k81/81
75.126.0.0/1665.5k81/81
119.81.0.0/1665.5k81/81
174.133.0.0/1665.5k81/81
66.98.128.0/1732.8k81/81
169.44.0.0/1732.8k81/81
169.44.128.0/1732.8k81/81
169.46.0.0/1732.8k81/81

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

  • Valid2.7%11
  • Invalid2.2%9
  • No ROA95.2%393

Propagation

  • Globally propagated90% of full-feed peers or more98.1%405
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%1.9%8

Prefix sizes

IPv4 — 340 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 28th Aug 2026.

  • Withdrawn209.90.46.0/2421st Sept 2026

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