subnet.im

AS2518BIGLOBE Inc.

JapanRegistryAPNICTypeEyeball

As of 27th September 2026, AS2518 (BIGLOBE Inc.), an access network registered in Japan with APNIC, originates 33 IPv4 prefixes covering 3.7M addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 173rd-largest of the 79,525 networks we see originating IPv4, and the 9th-largest of 729 in Japan. It is seen behind 26 upstream networks, most often AS2516 (KDDI Corporation) and AS174 (Cogent Communications, LLC), and in front of 36 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

33

IPv6 prefixes

2

IPv4 addresses

3.7M

IPv6 /64s

38.7B

Upstream graph

The networks AS2518 is seen behind, one and two hops out, drawn from real AS paths.

AS2518Toward the internet core
Upstream graph for AS2518: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS2518BIGLOBE Inc.This networkAS174Cogent Communicat…AS1299Arelion (fka. Tel…AS2516KDDI CorporationAS2914NTT America, Inc.AS32590Valve CorporationAS151326DCConnect Communi…AS8888xTom Pty LtdAS13030Init7 (Switzerlan…AS3356Lumen (Level 3)AS3130RGnet OUAS49544i3D.net B.VAS6939Hurricane Electri…

Networks observed one and two hops upstream of AS2518 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

338

adjacent networks

Upstreams
268%
Peers
27682%
Downstreams
3611%

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

Upstreams of AS2518
NetworkCountryRelationshipPathsVantage pts
AS2516KDDI CorporationJPPeer4,63298
AS174Cogent Communications, LLCUSPeer4,32774
AS1299Arelion (fka. Telia Carrier)SEPeer2,93970
AS2914NTT America, Inc.USPeer2,59645
AS32590Valve CorporationUSPeer7782
AS24482SG.GSSGPeer7332
AS7713PT Telkom Indonesia TbkIDPeer6884
AS8455atom86 BVNLPeer6554
AS199524Gcore S.A.LUPeer6102
AS9002RETN LimitedGBPeer54710

Prefixes

All 35

The largest blocks AS2518 originates, widest first.

Largest prefixes originated by AS2518
PrefixAddressesVisibility
125.192.0.0/13524k79/81
60.236.0.0/14262k80/81
118.108.0.0/14262k80/81
119.240.0.0/14262k79/81
122.132.0.0/14262k80/81
133.200.0.0/14262k79/81
111.168.0.0/15131k80/81
119.238.0.0/15131k80/81
122.130.0.0/15131k79/81
133.206.0.0/15131k79/81

Routing health

How AS2518'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%35
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%35
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 33 prefixes

IPv6 — 2 prefixes

  • /2934.4B × /6450.0%1
  • /324.3B × /6450.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS2518 started or stopped in this period.

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