subnet.im

AS55900GLBB Japan KK

JapanRegistryAPNICTypeEyeball

As of 10th November 2026, AS55900 (GLBB Japan KK), an access network registered in Japan with APNIC, originates 31 IPv4 prefixes covering 57.3k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 4,252nd-largest of the 80,733 networks we see originating IPv4, and the 178th-largest of 737 in Japan. It is seen behind 12 upstream networks, most often AS2497 (Internet Initiative Japan Inc.) and AS2914 (NTT America, Inc.), and in front of 8 downstream networks. Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 94% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

31

IPv6 prefixes

1

IPv4 addresses

57.3k

IPv6 /64s

4.3B

Upstream graph

The networks AS55900 is seen behind, one and two hops out, drawn from real AS paths.

AS55900Toward the internet core
Upstream graph for AS55900: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS55900GLBB Japan KKThis networkAS1299Arelion (fka. Tel…AS2497Internet Initiati…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS6939Hurricane Electri…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS49544i3D.net B.VAS215859Hetzner Cloud - S…AS3549Lumen (fka. Globa…AS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS55900 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

113

adjacent networks

Upstreams
1211%
Peers
9382%
Downstreams
87%

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

Upstreams of AS55900
NetworkCountryRelationshipPathsVantage pts
AS2497Internet Initiative Japan Inc.JPPeer3,45090
AS2914NTT America, Inc.USPeer2,67637
AS1299Arelion (fka. Telia Carrier)SEPeer2,14763
AS3356Lumen (Level 3)USPeer31238
AS6939Hurricane Electric LLCUSPeer13619
AS18106Viewqwest Pte LtdSGPeer1002
AS4775Globe TelecomsPHAdjacent602
AS35280F5 Networks SARLFRPeer594
AS49544i3D.net B.VNLPeer572
AS9002RETN LimitedGBPeer562

Prefixes

All 32

The largest blocks AS55900 originates, widest first.

Largest prefixes originated by AS55900
PrefixAddressesVisibility
27.0.16.0/204.1k76/76
104.222.192.0/204.1k76/76
109.236.0.0/204.1k76/76
137.220.16.0/204.1k76/76
172.97.80.0/204.1k76/76
180.131.208.0/204.1k76/76
180.131.224.0/204.1k76/76
180.131.240.0/204.1k76/76
198.144.128.0/204.1k76/76
104.222.208.0/212k76/76

Routing health

How AS55900'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%32
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more93.8%30
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%6.3%2

Prefix sizes

IPv4 — 31 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS55900 started or stopped in this period.

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