$ query “AS73” --type=asn → 1 result(s)
AS73 · WASHINGTON-AS
University of Washington
AS73 is run by University of Washington and is an educational/research access provider, based in the United States since 1986. The system announces a solid 239 104 IPv4 addresses, including a /16, and supports IPv6. Most of its address space is geolocated to the United States.
- Pioneer — Registered before the year 2000
Basic Information
- Country
- 🇺🇸 United States
- Category
- Education/Research
- Network Role
- Access Provider
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- May 05, 1986
- Last Changed
- April 01, 2026
- Last Seen
- May 11, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 10 / 10
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 239 104
- Largest IPv4 Prefix
- /16 (65 536 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇺🇸 United States (370 176 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 1 upstream providing transit
- Downstream Customers
- 1 downstream buying transit
- Degree
- 2 unique BGP neighbors
- Reach
- 1 network in customer cone
Upstream Providers (1)
- AS101 — WASH-NSF-AS
Prefix Lists
IPv4 Prefixes (10 total)
- 128.95.0.0/16 (65 536 addresses (/16 prefix))
- 128.208.0.0/16 (65 536 addresses (/16 prefix))
- 140.142.0.0/16 (65 536 addresses (/16 prefix))
- 69.91.192.0/18 (16 384 addresses (/18 prefix))
- 173.250.160.0/19 (8 192 addresses (/19 prefix))
- 198.48.64.0/19 (8 192 addresses (/19 prefix))
- 205.175.96.0/19 (8 192 addresses (/19 prefix))
- 108.179.140.0/22 (1 024 addresses (/22 prefix))
- 192.26.136.0/24 (256 addresses (/24 prefix))
- 192.42.144.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (1 total)
- 2607:4000::/32