AS18564St. John's University, New York
United StatesRegistryARINAs of 10th November 2026, AS18564 (St. John's University, New York), a network registered in the United States with ARIN, originates 9 IPv4 prefixes covering 133k addresses. By IPv4 address space that makes it the 1,916th-largest of the 80,733 networks we see originating IPv4, and the 591st-largest of 18,751 in the United States. It is seen behind 4 upstream networks, most often AS174 (Cogent Communications, LLC) and AS12271 (Charter Communications Inc). 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 AS18564 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS18564 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
- 444%
- Peers
- 556%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS174Cogent Communications, LLC | US | Peer | 382 | 75 |
| AS12271Charter Communications Inc | US | Peer | 286 | 76 |
| AS3754NYSERNet | US | Peer | 8 | 2 |
| AS3630NYSERNet | US | Peer | 4 | 1 |
Prefixes
The largest blocks AS18564 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 149.68.0.0/16 | 65.5k | 76/76 |
| 149.68.0.0/17 | 32.8k | 75/76 |
| 149.68.128.0/17 | 32.8k | 75/76 |
| 38.105.194.0/24 | 256 | 75/76 |
| 38.108.196.0/24 | 256 | 76/76 |
| 149.68.7.0/24 | 256 | 76/76 |
| 149.68.239.0/24 | 256 | 75/76 |
| 149.68.241.0/24 | 256 | 76/76 |
| 149.68.243.0/24 | 256 | 76/76 |
Routing health
How AS18564'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%9
Propagation
- Globally propagated90% of full-feed peers or more100.0%9
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
Recent changes
Announcements that started or stopped since 12th Oct 2026.
No announcement by AS18564 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.