$ query “AS2” --type=asn → 1 result(s)
AS2 · UDEL-DCN
University of Delaware
AS2 is owned by University of Delaware and is an educational/research stub network, established in the United States in 1991. The system announces a respectable 84 480 IPv4 addresses, including a /16, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in India and South Africa, and smaller footprints in 2 additional countries. Prefix announcements for this AS were recently updated.
- Pioneer — Registered before the year 2000
Basic Information
- Country
- 🇺🇸 United States
- Category
- Education/Research
- Network Role
- Stub Network
- Data Origin
- Authoritative — Metadata from authoritative RIR registry (ARIN, RIPE, APNIC, etc.)
- Registered
- January 10, 1991
- Last Changed
- April 01, 2026
- Last Seen
- May 13, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 12 / 10
- IPv6 Prefixes (raw / aggregated)
- 2 / 2
- IPv4 Addresses
- 84 480
- Largest IPv4 Prefix
- /16 (65 536 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇺🇸 United States (65 536 IPs), 🇮🇳 India (8 192 IPs), 🇿🇦 South Africa (5 120 IPs) and 2 more
- Prefix Changed
- May 08, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 13 upstreams providing transit
- Peers
- 1 network exchanging traffic without transit
- Unclassified
- 8 unclassified BGP neighbors
- Degree
- 22 unique BGP neighbors
- Reach
- 0 networks in customer cone
Upstream Providers (13)
Prefix Lists
IPv4 Prefixes (12 total)
- 128.4.0.0/16 (65 536 addresses (/16 prefix))
- 171.79.128.0/19 (8 192 addresses (/19 prefix))
- 91.143.144.0/20 (4 096 addresses (/20 prefix))
- 129.205.64.0/20 (4 096 addresses (/20 prefix))
- 154.65.12.0/22 (1 024 addresses (/22 prefix))
- 45.228.74.0/23 (512 addresses (/23 prefix))
- 45.161.25.0/24 (256 addresses (/24 prefix))
- 189.76.77.0/24 (256 addresses (/24 prefix))
- 194.190.53.0/24 (256 addresses (/24 prefix))
- 194.190.54.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (2 total)
- 2804:3edc::/32
- 2001:67c:1328::/48