AS55888Nintatsu Global Telecommunications Corporation
JapanRegistryAPNICAs of 10th November 2026, AS55888 (Nintatsu Global Telecommunications…), a network registered in Japan with APNIC, originates 6 IPv4 prefixes covering 1.7k addresses. By IPv4 address space that makes it the 31,724th-largest of the 80,733 networks we see originating IPv4, and the 509th-largest of 737 in Japan. It is seen behind 10 upstream networks, most often AS2914 (NTT America, Inc.) and AS137983 (TIANFENG (HONG KONG) COMMUNICATIONS…), and in front of 7 downstream networks. 17% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 83% of its routes reach at least 90% of full-feed peers.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS55888 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS55888 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
36
adjacent networks
- Upstreams
- 1028%
- Peers
- 1953%
- Downstreams
- 719%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS2914NTT America, Inc. |  US | Peer | 699 | 76 |
| AS137983TIANFENG (HONG KONG) COMMUNICATIONS LIMITED |  HK | Peer | 212 | 64 |
| AS45250Vocom International Telecommunications AP Area | US | Peer | 100 | 76 |
| AS2497Internet Initiative Japan Inc. | JP | Peer | 67 | 67 |
| AS6939Hurricane Electric LLC | US | Peer | 4 | 4 |
| AS8966Etisalat (E&) |  AE | Peer | 1 | 1 |
| AS24482SG.GS |  SG | Peer | 1 | 1 |
| AS4775Globe Telecoms |  PH | Adjacent | 1 | 1 |
| AS9002RETN Limited |  GB | Peer | 1 | 1 |
| AS49544i3D.net B.V |  NL | Peer | 1 | 1 |
Prefixes
The largest blocks AS55888 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 36.50.48.0/23 | 512 | 76/76 |
| 36.50.48.0/24 | 256 | 76/76 |
| 36.50.49.0/24 | 256 | 76/76 |
| 202.24.197.0/24 | 256 | 76/76 |
| 202.48.254.0/24 | 256 | 76/76 |
| 61.200.81.128/25 | 128 | 5/76 |
Routing health
How AS55888'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
- Valid16.7%1
- Invalid0.0%0
- No ROA83.3%5
Propagation
- Globally propagated90% of full-feed peers or more83.3%5
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%16.7%1
Prefix sizes
IPv4 — 6 prefixes
Recent changes
Announcements that started or stopped since 12th Oct 2026.
No announcement by AS55888 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.