AS8664University of Warsaw
PolandRegistryRIPE NCCAs of 11th November 2026, AS8664 (University of Warsaw), a network registered in Poland with RIPE NCC, originates 6 IPv4 prefixes covering 8.2k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 12,070th-largest of the 80,743 networks we see originating IPv4, and the 179th-largest of 2,109 in Poland. It is seen behind 8 upstream networks, most often AS8501 (Institute of Bioorganic Chemistry…) and AS6939 (Hurricane Electric LLC), and in front of 3 downstream networks. None of its announcements have a valid RPKI ROA. 88% 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 AS8664 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS8664 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
43
adjacent networks
- Upstreams
- 819%
- Peers
- 3274%
- Downstreams
- 37%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS8501Institute of Bioorganic Chemistry Polish Academy of Science, Poznan Supercomputing and Networking Center | PL | Peer | 517 | 116 |
| AS6939Hurricane Electric LLC |  US | Peer | 101 | 61 |
| AS24482SG.GS |  SG | Peer | 11 | 2 |
| AS49544i3D.net B.V |  NL | Peer | 11 | 2 |
| AS201054Stowarzyszenie e-Poludnie | PL | Peer | 2 | 1 |
| AS22356Durand do Brasil Ltda |  BR | Peer | 1 | 1 |
| AS132337Axclusive | SG | Adjacent | 1 | 1 |
| AS262355VSX Networks | BR | Peer | 1 | 1 |
Prefixes
The largest blocks AS8664 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 212.87.16.0/20 | 4.1k | 75/76 |
| 213.135.56.0/21 | 2k | 75/76 |
| 213.135.52.0/22 | 1k | 75/76 |
| 213.135.50.0/23 | 512 | 75/76 |
| 193.219.28.0/24 | 256 | 75/76 |
| 213.135.43.0/24 | 256 | 75/76 |
| 2001:6a0::/32 | 4.3B × /64 | 3/63 |
| 2001:6a0::/34 | 1.1B × /64 | 62/63 |
Routing health
How AS8664'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%8
Propagation
- Globally propagated90% of full-feed peers or more87.5%7
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%12.5%1
Prefix sizes
IPv4 — 6 prefixes
IPv6 — 2 prefixes
- /324.3B × /6450.0%1
- /341.1B × /6450.0%1
Recent changes
Announcements that started or stopped since 12th Oct 2026.
No announcement by AS8664 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.