AS37US DoD Naval Surface Warfare Center
United StatesRegistryARINAs of 22nd October 2026, AS37 (US DoD Naval Surface Warfare Center), a network registered in the United States with ARIN, originates 17 IPv4 prefixes covering 72.7k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 3,001st-largest of the 79,663 networks we see originating IPv4, and the 969th-largest of 18,476 in the United States. It is seen behind 1 upstream network, most often AS668 (DoD High Performance Computing (Defense…). 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
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS37 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS37 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 |
|---|---|---|---|---|
| AS668DoD High Performance Computing (Defense Research and Engineering Network) | US | Peer | 1,373 | 141 |
Prefixes
The largest blocks AS37 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 128.38.0.0/16 | 65.5k | 77/77 |
| 198.91.64.0/21 | 2k | 77/77 |
| 199.10.8.0/22 | 1k | 77/77 |
| 198.91.72.0/23 | 512 | 77/77 |
| 199.10.12.0/23 | 512 | 77/77 |
| 198.91.64.0/24 | 256 | 77/77 |
| 198.91.65.0/24 | 256 | 77/77 |
| 198.91.66.0/24 | 256 | 77/77 |
| 198.91.67.0/24 | 256 | 77/77 |
| 198.91.69.0/24 | 256 | 77/77 |
Routing health
How AS37'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%18
Propagation
- Globally propagated90% of full-feed peers or more100.0%18
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 17 prefixes
IPv6 — 1 prefixes
- /4865.5k × /64100.0%1
Recent changes
Announcements that started or stopped since 23rd Sept 2026.
No announcement by AS37 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.