Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
Network profile
Source: PeeringDB →Present at 3 internet exchanges: Equinix Warsaw, TPIX PL, THINX Warsaw
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 212.87.16.0/20 | 4.1K |
25.7%
|
University of Warsaw | PL | Mazovia | Warsaw |
| 213.135.56.0/21 | 2.0K |
46.4%
|
University of Warsaw | PL | — | — |
| 213.135.52.0/22 | 1.0K |
8.0%
|
University of Warsaw | PL | — | — |
| 213.135.50.0/23 | 512 |
43.0%
|
University of Warsaw | PL | — | — |
| 193.219.28.0/24 | 256 |
66.8%
|
University of Warsaw | PL | — | — |
| 213.135.43.0/24 | 256 |
99.2%
|
University of Warsaw | PL | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS8664 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 212.87.16.0/20 | 7,106 | 2026-07-31 02:27:40 |
| 213.135.56.0/21 | 7,073 | 2026-07-31 02:27:39 |
| 213.135.52.0/22 | 7,064 | 2026-07-31 02:27:40 |
| 213.135.50.0/23 | 7,057 | 2026-07-31 02:27:41 |
| 193.219.28.0/24 | 7,026 | 2026-07-31 02:27:41 |
| 213.135.43.0/24 | 7,011 | 2026-07-31 02:27:41 |
| 213.135.55.23/32 | 2 | 2026-06-02 16:32:06 |
Frequently Asked Questions
What is AS8664?
AS8664 is an Autonomous System Number assigned to University of Warsaw. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS8664 announce?
AS8664 announces 8.2K IPv4 addresses distributed across 6 routed CIDR prefixes. The network is registered in Poland.
Who operates AS8664?
AS8664 is operated by University of Warsaw. The organization is based in Poland. You can view all IP ranges and related ASNs on the organization page.
What country is AS8664 registered in?
AS8664 is registered in Poland. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
