$ query “AS101” --type=asn → 1 result(s)
AS101 · WASH-NSF-AS
University of Washington
AS101 is operated by University of Washington and serves as a mid-size transit provider, established in the United States in 1987. The system announces 8 192 IPv4 addresses, and supports IPv6. Most of its address space is geolocated to the United States.
- Top 5% — Top 5% of all autonomous systems by reach and degree
- Pioneer — Registered before the year 2000
Basic Information
- Country
- 🇺🇸 United States
- Category
- Education/Research
- Network Role
- Mid-size Transit
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- March 31, 1987
- Last Changed
- March 04, 2026
- Last Seen
- June 16, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 4 / 2
- IPv6 Prefixes (raw / aggregated)
- 5 / 2
- IPv4 Addresses
- 8 192
- Largest IPv4 Prefix
- /20 (4 096 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇺🇸 United States (8 192 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 7 upstreams providing transit
- Peers
- 29 networks exchanging traffic without transit
- Downstream Customers
- 19 downstreams buying transit
- Degree
- 55 unique BGP neighbors
- Reach
- 60 networks in customer cone
Upstream Providers (7)
Prefix Lists
IPv4 Prefixes (4 total)
- 207.231.240.0/20 (4 096 addresses (/20 prefix))
- 209.124.176.0/20 (4 096 addresses (/20 prefix))
IPv6 Prefixes (5 total)
- 2001:1860::/32
- 2001:504:b::/48