subnet.im

AS18186Nebula Global LLC

United StatesRegistryARIN

As of 26th September 2026, AS18186 (Nebula Global LLC), a network registered in the United States with ARIN, originates 614 IPv4 prefixes covering 332k addresses and 17 IPv6 prefixes. By IPv4 address space that makes it the 916th-largest of the 79,516 networks we see originating IPv4, and the 231st-largest of 18,424 in the United States. It is seen behind 35 upstream networks, most often AS2914 (NTT America, Inc.) and AS3491 (PCCW Global (HK) Ltd.), and in front of 16 downstream networks. 11% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 97% of its routes reach at least 90% of full-feed peers, and 2 prefixes are also originated by another network.

At a glance

IPv4 prefixes

614

IPv6 prefixes

17

IPv4 addresses

332k

IPv6 /64s

1.1M

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…AS3130RGnet OUAS49544i3D.net B.VAS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS16552Tiggee LLCAS32590Valve CorporationAS6461Zayo Bandwidth

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

150

adjacent networks

Upstreams
3523%
Peers
9966%
Downstreams
1611%

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

Upstreams of AS18186
NetworkCountryRelationshipPathsVantage pts
AS2914NTT America, Inc.USPeer13,937119
AS3491PCCW Global (HK) Ltd.HKPeer8,55691
AS4637Telstra International LimitedHKPeer8,41495
AS7473Singapore Telecommunications LtdSGPeer7,65796
AS3356Lumen (Level 3)USPeer7,28252
AS17676SoftBank Corp.JPPeer1,80944
AS6939Hurricane Electric LLCUSPeer1,35119
AS8796FASTNET DATA INCUSPeer1,22981
AS13335Cloudflare, Inc.USPeer1,02781
AS4635HKIX Route ServersHKPeer1,00816

Prefixes

All 631

The largest blocks AS18186 originates, widest first.

Largest prefixes originated by AS18186
PrefixAddressesVisibility
207.56.0.0/1665.5k81/81
207.57.0.0/1665.5k80/81
154.19.192.0/198.2k81/81
206.119.0.0/198.2k80/81
38.182.192.0/204.1k80/81
38.182.240.0/204.1k81/81
149.104.176.0/204.1k81/81
154.39.112.0/204.1k81/81
39.109.8.0/212k81/81
206.119.56.0/212k81/81

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

  • Valid10.6%67
  • Invalid0.2%1
  • No ROA89.2%563

Propagation

  • Globally propagated90% of full-feed peers or more96.7%610
  • Partially propagated40% to 90%0.3%2
  • Seen by few peersUnder 40%3.0%19

Prefix sizes

IPv4 — 614 prefixes

IPv6 — 17 prefixes

  • /4865.5k × /64100.0%17

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Announced154.39.69.0/2422nd Sept 2026
  • Withdrawn207.57.32.0/2421st Sept 2026
  • Withdrawn207.57.33.0/2421st Sept 2026
  • Withdrawn207.57.34.0/2421st Sept 2026

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