AS73
University of Washington
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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About University of Washington
The University of Washington is a public research university in Seattle, Washington, United States. Founded in 1861, it is one of the oldest universities on the West Coast.
AS73 — global IP footprint
Cities where AS73 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 128.95.0.0/16 | 65.5K |
12.3%
|
University of Washington | US | Washington | Lynnwood |
| 128.208.0.0/16 | 65.5K |
9.3%
|
University of Washington | US | Washington | Seattle |
| 140.142.0.0/16 | 65.5K |
6.8%
|
University of Washington | US | Washington | Seattle |
| 69.91.192.0/18 | 16.4K |
2.6%
|
University of Washington | US | Washington | Seattle |
| 173.250.160.0/19 | 8.2K |
1.7%
|
University of Washington | US | — | — |
| 205.175.96.0/19 | 8.2K |
30.6%
|
University of Washington | US | Washington | Seattle |
| 198.48.64.0/20 | 4.1K |
0.7%
|
University of Washington | US | — | — |
| 198.48.80.0/21 | 2.0K |
5.9%
|
University of Washington | US | — | — |
| 108.179.140.0/22 | 1.0K |
0.0%
|
University of Washington | US | — | — |
| 198.48.88.0/22 | 1.0K |
0.0%
|
University of Washington | US | — | — |
| 192.26.136.0/24 | 256 |
0.0%
|
University of Washington | US | — | — |
| 192.42.144.0/24 | 256 |
1.2%
|
University of Washington | US | Washington | Seattle |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS73 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 |
|---|---|---|
| 140.142.0.0/16 | 3,956 | 2026-07-22 01:57:51 |
| 108.179.140.0/22 | 3,956 | 2026-07-22 01:57:51 |
| 128.95.0.0/16 | 3,946 | 2026-07-22 01:57:51 |
| 128.208.0.0/16 | 3,940 | 2026-07-22 01:57:51 |
| 173.250.160.0/19 | 3,914 | 2026-07-22 01:57:51 |
| 69.91.192.0/18 | 3,908 | 2026-07-22 01:57:51 |
| 198.48.64.0/19 | 3,903 | 2026-07-22 01:57:51 |
| 205.175.96.0/19 | 3,891 | 2026-07-22 01:57:51 |
| 192.42.144.0/24 | 3,880 | 2026-07-22 01:57:51 |
| 192.26.136.0/24 | 3,860 | 2026-07-22 01:57:51 |
Frequently Asked Questions
What is AS73?
AS73 is an Autonomous System Number assigned to University of Washington. 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 AS73 announce?
AS73 announces 238.1K IPv4 addresses distributed across 12 routed CIDR prefixes. The network is registered in United States.
Who operates AS73?
AS73 is operated by University of Washington. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS73 registered in?
AS73 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
