$ query “AS3527” --type=asn → 1 result(s)
AS3527 · NIH-NET
National Institutes of Health
AS3527 is operated by National Institutes of Health and serves as an educational/research access provider, based in the United States since 1994. The system announces a solid 336 640 IPv4 addresses, including a /16, and supports IPv6. The bulk of its IP address space is in the United States, with additional presence in Australia.
- 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
- April 07, 1994
- Last Changed
- May 01, 2026
- Last Seen
- May 18, 2026 (active)
Prefix Summary
- IPv4 Prefixes (raw / aggregated)
- 15 / 8
- IPv6 Prefixes (raw / aggregated)
- 1 / 1
- IPv4 Addresses
- 336 640
- Largest IPv4 Prefix
- /16 (65 536 addresses)
- Largest IPv6 Prefix
- /43
- Geolocated Countries
- 🇺🇸 United States (483 328 IPs), 🇦🇺 Australia (768 IPs)
- Prefix Changed
- March 04, 2026
Reputation
- Reputation
- Pristine — 0 flagged IPs
Connectivity Summary
- Upstream Providers
- 2 upstreams providing transit
- Downstream Customers
- 1 downstream buying transit
- Degree
- 3 unique BGP neighbors
- Reach
- 1 network in customer cone
Upstream Providers (2)
Prefix Lists
IPv4 Prefixes (15 total)
- 128.231.0.0/16 (65 536 addresses (/16 prefix))
- 137.187.0.0/16 (65 536 addresses (/16 prefix))
- 156.40.0.0/16 (65 536 addresses (/16 prefix))
- 157.98.0.0/16 (65 536 addresses (/16 prefix))
- 165.112.0.0/16 (65 536 addresses (/16 prefix))
- 162.99.224.0/19 (8 192 addresses (/19 prefix))
- 192.231.146.0/23 (512 addresses (/23 prefix))
- 192.231.145.0/24 (256 addresses (/24 prefix))
IPv6 Prefixes (1 total)
- 2607:f220:400::/43