National Institutes of Health
AS3527 is National Institutes of Health (nih.gov). It announces 324,608 IPv4 addresses in 15 prefixes, and 1 IPv6 prefixes.
United States· ARIN· allocated 1994-04-07· 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 States324,608 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- NIH-NET
- name
- National Institutes of Health
- org
- NIH-Z
- org name
- National Institutes of Health
- org address
- 9000 Rockville Pike, MSC 4805, Bethesda, MD, 20892-4805
- org city
- Bethesda
- org country
- US
- country
- US
- source
- arin
- created
- 1994-04-07
- updated
- 2022-10-28
- abuse name
- NIHtechs
- abuse email
- citnsarin@mail.nih.gov
- abuse phone
- +1-301-402-3141
- abuse kind
- role
- abuse city
- Bethesda
- abuse country
- US
- admin name
- NIHadm
- admin email
- citnsarin@mail.nih.gov
- admin phone
- +1-301-402-3141
- admin kind
- role
- admin city
- Bethesda
- admin country
- US
- tech name
- NIHtechs
- tech email
- citnsarin@mail.nih.gov
- tech phone
- +1-301-402-3141
- tech kind
- role
- tech city
- Bethesda
- 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%
- anyip, floppydata, geonode0.00%
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- None here
- SSH IP190.01%
- 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 |
|---|---|---|---|---|
| 128.231.0.0/16 | United States | valid | 19 | 2026-10-02 |
| 128.231.3.0/24 | United States | valid | 17 | 2026-10-02 |
| 128.231.245.0/24 | United States | valid | 17 | 2026-10-02 |
| 137.187.0.0/16 | United States | valid | 19 | 2026-10-02 |
| 156.40.0.0/16 | United States | not found | 19 | 2026-10-02 |
| 157.98.0.0/16 | United States | not found | 19 | 2026-10-02 |
| 162.99.224.0/19 | United States | not found | 17 | 2026-10-02 |
| 165.112.0.0/16 | United States | valid | 19 | 2026-10-02 |
| 165.112.0.0/20also AS30387 | United States | valid | 4 | 2026-10-02 |
| 165.112.0.0/21also AS30387 | United States | valid | 4 | 2026-10-02 |
| 165.112.136.0/21also AS30387 | United States | valid | 4 | 2026-10-02 |
| 192.231.145.0/24 | United States | valid | 19 | 2026-10-02 |
| 192.231.146.0/23 | United States | valid | 17 | 2026-10-02 |
| 192.231.146.0/24 | United States | valid | 17 | 2026-10-02 |
| 192.231.147.0/24 | United States | valid | 19 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2607:f220:400::/43 | United States | valid | 20 | 2026-10-02 |
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