U.S. National Science Foundation
AS102 is U.S. National Science Foundation (nsf.gov). It announces 66,048 IPv4 addresses in 3 prefixes, and 3 IPv6 prefixes.
United States· ARIN· allocated 1987-03-31· government
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- United States66,048 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- NSF-HQ-AS
- name
- U.S. National Science Foundation
- org
- NSF
- org name
- U.S. National Science Foundation
- org address
- Randolph Building, 401 Dulany Street, Alexandria, VA, 22314
- org city
- Alexandria
- org country
- US
- country
- US
- source
- arin
- created
- 1987-03-31
- updated
- 2025-02-11
- abuse name
- NSF Abuse
- abuse email
- arin-abuse@nsf.gov
- abuse phone
- +1-703-292-5050
- abuse kind
- role
- abuse city
- Alexandria
- abuse country
- US
- admin name
- Org-Owner
- admin email
- ccoyne@nsf.gov
- admin phone
- +1-703-292-4223
- admin kind
- role
- admin city
- Alexandria
- admin country
- US
- tech name
- Org-Owner
- tech email
- ccoyne@nsf.gov
- tech phone
- +1-703-292-4223
- tech kind
- role
- tech city
- Alexandria
- tech country
- US
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- 0.00%
- lightningproxies0.00%
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- 0.00%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 128.150.0.0/16 | United States | not found | 17 | 2026-10-02 |
| 192.12.209.0/24 | United States | not found | 17 | 2026-10-02 |
| 198.181.231.0/24 | United States | not found | 17 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2001:428:2500:1c::/64 | United States | not found | 3 | 2026-10-02 |
| 2001:428:9002:f806::/64 | United States | not found | 3 | 2026-10-02 |
| 2620:10f:6000::/40 | United States | not found | 20 | 2026-10-02 |
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