subnet.im

AS401984Tomorin Network, LLC

United StatesRegistryARIN

As of 28th September 2026, AS401984 (Tomorin Network, LLC), a network registered in the United States with ARIN, originates 12 IPv4 prefixes covering 4.9k addresses. By IPv4 address space that makes it the 15,840th-largest of the 79,556 networks we see originating IPv4, and the 4,456th-largest of 18,429 in the United States. It is seen behind 3 upstream networks, most often AS9886 (CTCSCI TECH LIMITED) and AS58453 (China Mobile International), and in front of 1 downstream network. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 25% 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

12

IPv6 prefixes

0

IPv4 addresses

4.9k

IPv6 /64s

0

Upstream graph

The networks AS401984 is seen behind, one and two hops out, drawn from real AS paths.

AS401984Toward the internet core
Upstream graph for AS401984: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS401984Tomorin Network, …This networkAS9886CTCSCI TECH LIMIT…AS58453China Mobile Inte…AS137409GSL Networks Pty …AS2914NTT America, Inc.AS3491PCCW Global (HK) …AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS8529Zain Omantel Inte…AS32590Valve Corporation

Networks observed one and two hops upstream of AS401984 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

7

adjacent networks

Upstreams
343%
Peers
343%
Downstreams
114%

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

Upstreams of AS401984
NetworkCountryRelationshipPathsVantage pts
AS9886CTCSCI TECH LIMITEDHKPeer51366
AS58453China Mobile InternationalHKPeer16781
AS137409GSL Networks Pty LTDAUPeer15166

Prefixes

The largest blocks AS401984 originates, widest first.

Largest prefixes originated by AS401984
PrefixAddressesVisibility
155.254.100.0/221k82/82
103.99.60.0/2351282/82
155.254.100.0/2351252/82
155.254.102.0/2351252/82
164.37.210.0/2351281/82
103.99.60.0/2425619/82
155.254.100.0/2425647/82
155.254.101.0/2425651/82
155.254.102.0/2425647/82
155.254.103.0/2425647/82

Routing health

How AS401984'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

  • Valid100.0%12
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more25.0%3
  • Partially propagated40% to 90%66.7%8
  • Seen by few peersUnder 40%8.3%1

Prefix sizes

IPv4 — 12 prefixes

Recent changes

Announcements that started or stopped since 29th Aug 2026.

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