$ query “AS5723” --type=asn → 1 result(s)
AS5723 · JHU
Johns Hopkins University
AS5723 is run by Johns Hopkins University and is an educational/research stub network, registered in the United States since 1995. The system announces a solid 135 680 IPv4 addresses, including a /16, and supports IPv6. Most of its address space is geolocated to the United States, with additional presence in Australia.
- 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
- September 06, 1995
- Last Changed
- March 04, 2026
- Last Seen
- April 14, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 8 / 7
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 135 680
- Largest IPv4 Prefix
- /16 (65 536 addresses)
- Largest IPv6 Prefix
- /32
- Geolocated Countries
- 🇺🇸 United States (203 264 IPs), 🇦🇺 Australia (1 024 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 5 upstreams providing transit
- Peers
- 1 network exchanging traffic without transit
- Degree
- 6 unique BGP neighbors
- Reach
- 0 networks in customer cone
Upstream Providers (5)
Prefix Lists
IPv4 Prefixes (8 total)
- 128.220.0.0/16 (65 536 addresses (/16 prefix))
- 162.129.0.0/16 (65 536 addresses (/16 prefix))
- 198.57.32.0/21 (2 048 addresses (/21 prefix))
- 198.57.40.0/22 (1 024 addresses (/22 prefix))
- 204.124.184.0/22 (1 024 addresses (/22 prefix))
- 192.12.13.0/24 (256 addresses (/24 prefix))
- 192.12.14.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (1 total)
- 2606:2b00::/32