AS3949NTT America, Inc.
United StatesRegistryARINAs of 26th September 2026, AS3949 (NTT America, Inc.), a network registered in the United States with ARIN, originates 47 IPv4 prefixes covering 15.9k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 8,313th-largest of the 79,516 networks we see originating IPv4, and the 2,653rd-largest of 18,424 in the United States. It is seen behind 1 upstream network, most often AS2914 (NTT America, Inc.). 83% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 79% 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 AS3949 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS3949 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
2
adjacent networks
- Upstreams
- 150%
- Peers
- 150%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS2914NTT America, Inc. | US | Peer | 3,123 | 145 |
Prefixes
All 48The largest blocks AS3949 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 205.132.16.0/21 | 2k | 80/81 |
| 91.123.68.0/22 | 1k | 80/81 |
| 91.123.72.0/22 | 1k | 80/81 |
| 207.71.84.0/22 | 1k | 81/81 |
| 217.24.64.0/22 | 1k | 81/81 |
| 217.24.68.0/22 | 1k | 81/81 |
| 80.96.148.0/23 | 512 | 80/81 |
| 23.27.212.0/24 | 256 | 81/81 |
| 23.27.213.0/24 | 256 | 80/81 |
| 23.27.227.0/24 | 256 | 80/81 |
Routing health
How AS3949'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
- Valid83.3%40
- Invalid0.0%0
- No ROA16.7%8
Propagation
- Globally propagated90% of full-feed peers or more79.2%38
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%20.8%10
Prefix sizes
IPv4 — 47 prefixes
IPv6 — 1 prefixes
- /4865.5k × /64100.0%1
Recent changes
Announcements that started or stopped since 28th Aug 2026.
- Withdrawn128.121.0.0/2221st Sept 2026
- Withdrawn128.121.34.0/2321st Sept 2026
- Withdrawn128.121.36.0/2321st Sept 2026
- Withdrawn128.121.42.0/2321st Sept 2026
- Withdrawn128.121.44.0/2321st Sept 2026
- Withdrawn128.241.36.0/2221st Sept 2026
- Withdrawn128.241.84.0/2221st Sept 2026
- Withdrawn128.242.88.0/2221st Sept 2026
- Withdrawn130.94.192.0/2321st Sept 2026
- Withdrawn130.94.196.0/2221st Sept 2026
- Withdrawn130.94.240.0/2221st Sept 2026
- Withdrawn131.103.118.0/2321st Sept 2026
0 announced and 31 withdrawn in all; the most recent are shown.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.