subnet.im

AS18186Nebula Global LLC

United StatesRegistryARIN

As of 11th November 2026, AS18186 (Nebula Global LLC), a network registered in the United States with ARIN, originates 708 IPv4 prefixes covering 453k addresses and 23 IPv6 prefixes. By IPv4 address space that makes it the 767th-largest of the 80,743 networks we see originating IPv4, and the 188th-largest of 18,754 in the United States. It is seen behind 37 upstream networks, most often AS2914 (NTT America, Inc.) and AS4637 (Telstra International Limited), and in front of 15 downstream networks. 23% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers, and 5 prefixes are also originated by another network.

At a glance

IPv4 prefixes

708

IPv6 prefixes

23

IPv4 addresses

453k

IPv6 /64s

1.5M

Upstream graph

The networks AS18186 is seen behind, one and two hops out, drawn from real AS paths.

AS18186Toward the internet core
Upstream graph for AS18186: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS18186Nebula Global LLCThis networkAS2914NTT America, Inc.AS3356Lumen (Level 3)AS3491PCCW Global (HK) …AS4637Telstra Internati…AS7473Singapore Telecom…AS49544i3D.net B.VAS215859Hetzner Cloud - S…AS3549Lumen (fka. Globa…AS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS16552Tiggee LLCAS32590Valve Corporation

Networks observed one and two hops upstream of AS18186 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

153

adjacent networks

Upstreams
3724%
Peers
10166%
Downstreams
1510%

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

Upstreams of AS18186
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer15,286116
AS4637Telstra International LimitedHKPeer9,42888
AS3491PCCW Global (HK) Ltd.HKPeer8,39184
AS3356Lumen (Level 3)USPeer6,42150
AS7473Singapore Telecommunications LtdSGPeer5,85166
AS54801Zillion Network Inc.USPeer2,21776
AS17676SoftBank Corp.JPPeer1,80642
AS6939Hurricane Electric LLCUSPeer1,31015
AS4635HKIX Route ServersHKPeer1,14416
AS152475IENS TECHNOLOGY PTE. LTDSGAdjacent1,10055

Prefixes

All 731

The largest blocks AS18186 originates, widest first.

Largest prefixes originated by AS18186
PrefixAddressesVisibility
207.56.0.0/1665.5k76/76
207.57.0.0/1665.5k23/76
207.56.0.0/1732.8k76/76
207.56.64.0/1816.4k76/76
207.57.192.0/1816.4k76/76
154.19.192.0/198.2k76/76
206.119.0.0/198.2k76/76
207.56.32.0/198.2k76/76
38.182.192.0/204.1k76/76
38.182.240.0/204.1k76/76

Routing health

How AS18186'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

  • Valid23.0%168
  • Invalid0.1%1
  • No ROA76.9%562

Propagation

  • Globally propagated90% of full-feed peers or more95.1%695
  • Partially propagated40% to 90%0.3%2
  • Seen by few peersUnder 40%4.7%34

Prefix sizes

IPv4 — 708 prefixes

IPv6 — 23 prefixes

  • /4865.5k × /64100.0%23

Recent changes

Announcements that started or stopped since 12th Oct 2026.

111 announced and 11 withdrawn in all; the most recent are shown.

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