AS64249Charles River Operation
United StatesRegistryARINAs of 12th November 2026, AS64249 (Charles River Operation), a network registered in the United States with ARIN, originates 62 IPv4 prefixes covering 24.3k addresses and 5 IPv6 prefixes. By IPv4 address space that makes it the 6,458th-largest of the 80,772 networks we see originating IPv4, and the 2,166th-largest of 18,759 in the United States. It is seen behind 3 upstream networks, most often AS27552 (TowardEX Technologies International…) and AS174 (Cogent Communications, LLC), and in front of 1 downstream network. 48% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 90% of its routes reach at least 90% of full-feed peers, and 4 prefixes are also originated by another network.
At a glance
IPv4 prefixes
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS64249 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS64249 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
9
adjacent networks
- Upstreams
- 333%
- Peers
- 556%
- Downstreams
- 111%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS27552TowardEX Technologies International, Inc. | US | Peer | 3,520 | 142 |
| AS174Cogent Communications, LLC | US | Peer | 1,178 | 136 |
| AS395584Data Management | US | Peer | 78 | 78 |
Prefixes
All 67The largest blocks AS64249 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 207.32.128.0/19 | 8.2k | 78/78 |
| 52.124.20.0/23 | 512 | 78/78 |
| 94.154.168.0/23 | 512 | 78/78 |
| 5.182.51.0/24 | 256 | 77/78 |
| 5.182.199.0/24 | 256 | 78/78 |
| 31.132.54.0/24 | 256 | 78/78 |
| 38.124.1.0/24 | 256 | 77/78 |
| 38.146.55.0/24 | 256 | 77/78 |
| 38.242.7.0/24 | 256 | 77/78 |
| 38.242.12.0/24 | 256 | 77/78 |
Routing health
How AS64249'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
- Valid47.8%32
- Invalid0.0%0
- No ROA52.2%35
Propagation
- Globally propagated90% of full-feed peers or more89.6%60
- Partially propagated40% to 90%1.5%1
- Seen by few peersUnder 40%9.0%6
Prefix sizes
IPv4 — 62 prefixes
IPv6 — 5 prefixes
- /324.3B × /6420.0%1
- /36268M × /6420.0%1
- /4016.8M × /6420.0%1
- /4865.5k × /6440.0%2
Recent changes
Announcements that started or stopped since 13th Oct 2026.
No announcement by AS64249 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.