AS73

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Summary

IP address summary information
Name	University of Washington
Country	United States
Website	host.io/washington.edu·washington.edu
Hosted domains	482
IPv4 addresses	239,104
IPv6 addresses	7.92 × 10²⁸
ASN type	Education
Registry	ARIN
Allocated	40 years ago on May 5, 1986
Updated	4 years ago on Oct 1, 2021

Ranking

#10,342

Overall rank

among 74,633 networks

Traffic

#7,290

Infrastructure

#12,033

#1,795inUnited States

Learn how ASN rankings work

Geolocation

Share of IPv4 footprint per hexagonLessMore

Countries by IPv4 share

United States
100%

Held location over 90 days: 98%
Held location over 1 year: 99%
Median days between moves: 400 days
Geolocation scope: City

How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.

Activity

A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.

Mon

IP Ranges

Netblock	Company	Num of IPs
128.95.0.0/16	University of Washington	65,536
128.208.0.0/16	University of Washington	65,536
140.142.0.0/16	University of Washington	65,536
69.91.192.0/18	University of Washington	16,384
173.250.160.0/19	University of Washington	8,192
198.48.64.0/19	University of Washington	8,192
205.175.96.0/19	University of Washington	8,192
108.179.140.0/22	University of Washington	1,024
192.26.136.0/24	University of Washington	256
192.42.144.0/24	University of Washington	256

IP Ranges

WHOIS


  ASHandle:       █████
  OrgID:          █████
  ASName:         ██████
  ASNumber:       AS█████
  RegDate:        ████-██-██
  Updated:        ████-██-██
  TechHandle:     ████-████
  Source:         ████

Hosted Domains

There are 482 domain names hosted across 151 IP addresses on this ASN.

IP Address	Domain	Count
128.208.60.35		133
128.208.61.21		129
128.208.3.117		20
140.142.142.240		19
128.208.3.226		19

Places

IPs in this network linked to physical places, based on their Wi-Fi networks.

Places IPs47
University46
Business Services1

Category	In AS73	Example IP
University	46	128.208.103.72
Business Services	1	128.208.196.2

New

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Places

Peers

There are 2 peers for this ASN.

ASN	Name	Rank
AS101	University of Washington
AS64247	University of Washington

Upstreams

There are 1 upstreams for this ASN.

ASN	Name	Rank
AS101	University of Washington

Downstreams

There are 1 downstreams for this ASN.

ASN	Name	Rank
AS64247	University of Washington

Pingable IPs

459 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more

IP Address	ASN	Details
140.142.103.51 Ping	AS73University of Washington	1.01ms from Seattle, US
140.142.223.97 Ping	AS73University of Washington	0.62ms from Seattle, US
140.142.28.193 Ping	AS73University of Washington	0.65ms from Seattle, US
128.95.97.221 Ping	AS73University of Washington	0.61ms from Seattle, US
128.95.178.193 Ping	AS73University of Washington	0.63ms from Seattle, US
128.208.6.69 Ping	AS73University of Washington	0.60ms from Seattle, US
128.95.6.100 Ping	AS73University of Washington	3.28ms from Seattle, US
128.208.12.13 Ping	AS73University of Washington	0.57ms from Seattle, US
128.95.100.209 Ping	AS73University of Washington	0.67ms from Seattle, US
140.142.18.23 Ping	AS73University of Washington	0.58ms from Seattle, US

Other Pingable IPs

IP Address	ASN	Details

Pingable IPs

Important routers in AS73


2607:4000:501:d::2	Seattle, United States
2607:4000:501:3::2	Seattle, United States
2607:4000:ffff:ff28::2	Seattle, United States
2607:4000:ff01:9::1	Seattle, United States
2607:4000:501:11::2	Seattle, United States
2607:4000:ffff:ff2c::2	Seattle, United States
140.142.242.131	Seattle, United States
140.142.10.39	Seattle, United States
140.142.241.3	Seattle, United States
2607:4000:ffff:ff2f::1	Seattle, United States

Important routers in AS73

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.Traceroute →

$ traceroute -a -n -q1 -f4 -m15 128.208.175.115

traceroute to 128.208.175.115 (128.208.175.115): 15 hops max, 52 byte packets

4 [AS174] 154.25.16.169 0.856 ms

5 [AS174] 154.54.57.141 1.59 ms

6 [AS174] 154.54.62.41 8.023 ms

7 [AS174] 154.54.44.162 106.157 ms

8 [AS174] 154.54.41.205 84.433 ms

9 [AS174] 154.54.82.253 137.786 ms

10 [AS174] 154.54.160.238 137.777 ms

11 [AS174] 38.88.51.42 137.271 ms

12 [AS101] 209.124.180.155 137.715 ms

13 *

14 *

15 *

Measurement taken from

IPinfo ProbeNet in Dublin, IE

On September 10, 2026

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS73 at robtex.

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AS73

Summary

Ranking

Geolocation

Countries by IPv4 share

Activity

IP Ranges

IP Ranges

WHOIS

Hosted Domains

Places

Places

Peers

Upstreams

Downstreams

Pingable IPs

Other Pingable IPs

Pingable IPs

Important routers in AS73

Important routers in AS73

Traceroute

Related Networks

AS10244

AS12060

AS14722

AS18943

AS21679

What is an ASN?

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Traceroute

Ranking

IP Ranges

Important routers in AS73

Geolocation

Countries by IPv4 share

Pingable IPs

Other Pingable IPs

Activity

Places

AS10244

AS12060

AS14722

AS18943

AS21679

AS32761