subnet.im

AS18978Enzu Inc

United StatesRegistryARINTypeEyeball

As of 27th September 2026, AS18978 (Enzu Inc), an access network registered in the United States with ARIN, originates 97 IPv4 prefixes covering 172k addresses and 17 IPv6 prefixes. By IPv4 address space that makes it the 1,500th-largest of the 79,525 networks we see originating IPv4, and the 427th-largest of 18,428 in the United States. It is seen behind 28 upstream networks, most often AS3257 (GTT Communications Inc.) and AS174 (Cogent Communications, LLC), and in front of 3 downstream networks. 24% of its announcements have a valid RPKI ROA; 2 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

97

IPv6 prefixes

17

IPv4 addresses

172k

IPv6 /64s

38.7B

Upstream graph

The networks AS18978 is seen behind, one and two hops out, drawn from real AS paths.

AS18978Toward the internet core
Upstream graph for AS18978: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS18978Enzu IncThis networkAS174Cogent Communicat…AS3257GTT Communication…AS6762Telecom Italia Sp…AS6939Hurricane Electri…AS137409GSL Networks Pty …AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS6667Elisa OyjAS398465Rackdog LLCAS2914NTT America, Inc.AS52075Wifirst S.A.S.AS32590Valve Corporation

Networks observed one and two hops upstream of AS18978 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

129

adjacent networks

Upstreams
2822%
Peers
9876%
Downstreams
32%

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

Upstreams of AS18978
NetworkCountryRelationshipPathsVantage pts
AS3257GTT Communications Inc.USPeer3,963145
AS174Cogent Communications, LLCUSPeer2,790139
AS6762Telecom Italia Sparkle (Seabone)ITPeer96992
AS137409GSL Networks Pty LTDAUPeer709138
AS6939Hurricane Electric LLCUSPeer41927
AS3491PCCW Global (HK) Ltd.HKPeer17927
AS14537Continent 8 LLCUSPeer1384
AS38880Micron21 Datacentre Pty LtdAUPeer1322
AS18106Viewqwest Pte LtdSGPeer1282
AS49544i3D.net B.VNLPeer1004

Prefixes

All 114

The largest blocks AS18978 originates, widest first.

Largest prefixes originated by AS18978
PrefixAddressesVisibility
23.231.192.0/1816.4k81/81
107.163.192.0/1816.4k81/81
38.127.32.0/198.2k81/81
107.163.160.0/198.2k81/81
108.187.16.0/204.1k81/81
108.187.240.0/204.1k81/81
154.217.0.0/204.1k81/81
154.217.32.0/204.1k80/81
154.217.48.0/204.1k81/81
154.217.64.0/204.1k81/81

Routing health

How AS18978'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

  • Valid23.7%27
  • Invalid1.8%2
  • No ROA74.6%85

Propagation

  • Globally propagated90% of full-feed peers or more97.4%111
  • Partially propagated40% to 90%0.9%1
  • Seen by few peersUnder 40%1.8%2

Prefix sizes

IPv4 — 97 prefixes

IPv6 — 17 prefixes

  • /2934.4B × /645.9%1
  • /324.3B × /645.9%1
  • /4016.8M × /645.9%1
  • /418.4M × /645.9%1
  • /424.2M × /6435.3%6
  • /441M × /6429.4%5
  • /4865.5k × /6411.8%2

Recent changes

Announcements that started or stopped since 28th Aug 2026.

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