subnet.im

AS63997Tsukaeru.net, Web Hosting Company, Japan

JapanRegistryAPNIC

As of 28th September 2026, AS63997 (Tsukaeru.net, Web Hosting Company, Japan), a network registered in Japan with APNIC, originates 8 IPv4 prefixes covering 13.6k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 8,914th-largest of the 79,544 networks we see originating IPv4, and the 295th-largest of 729 in Japan. It is seen behind 8 upstream networks, most often AS2497 (Internet Initiative Japan Inc.) and AS6939 (Hurricane Electric LLC), and in front of 1 downstream network. None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

8

IPv6 prefixes

1

IPv4 addresses

13.6k

IPv6 /64s

4.3B

Upstream graph

The networks AS63997 is seen behind, one and two hops out, drawn from real AS paths.

AS63997Toward the internet core
Upstream graph for AS63997: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS63997Tsukaeru.net, Web…This networkAS2497Internet Initiati…AS4775Globe TelecomsAS6939Hurricane Electri…AS8966Etisalat (E&)AS9002RETN LimitedAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3491PCCW Global (HK) …AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS35280F5 Networks SARLAS132337Axclusive

Networks observed one and two hops upstream of AS63997 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

25

adjacent networks

Upstreams
832%
Peers
1664%
Downstreams
14%

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

Upstreams of AS63997
NetworkCountryRelationshipPathsVantage pts
AS2497Internet Initiative Japan Inc.JPPeer747118
AS6939Hurricane Electric LLCUSPeer5316
AS8966Etisalat (E&)AEPeer182
AS24482SG.GSSGPeer112
AS49544i3D.net B.VNLPeer112
AS9002RETN LimitedGBPeer112
AS4775Globe TelecomsPHPeer112
AS7713PT Telkom Indonesia TbkIDPeer63

Prefixes

The largest blocks AS63997 originates, widest first.

Largest prefixes originated by AS63997
PrefixAddressesVisibility
27.112.104.0/212k82/82
111.68.16.0/212k82/82
119.82.24.0/212k82/82
121.50.40.0/212k82/82
175.45.136.0/212k82/82
203.83.240.0/212k82/82
45.124.136.0/221k82/82
195.95.180.0/2425682/82
2400:6b00::/324.3B × /6465/65

Routing health

How AS63997'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%9

Propagation

  • Globally propagated90% of full-feed peers or more100.0%9
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 8 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 29th Aug 2026.

No announcement by AS63997 started or stopped in this period.

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