Autonomous system
AS3527 NIH-NET - National Institutes of Health
Unclassified ARIN
Summary
National Institutes of Health (NIH)
government research legacy
NIH-NET, the network of the US National Institutes of Health, the federal government's principal medical research agency, headquartered in Bethesda, Maryland.
What it's used for
- Campus and research networking across the NIH intramural programme — labs, the Clinical Center, and the institutes and centres that make up NIH.
- Public-facing NIH services such as PubMed and the National Library of Medicine sit behind NIH's networks.
Notable
- Government and research address space (roughly 325,000 IPv4 addresses) — a large institutional allocation rather than a commercial one.
- Traffic here is overwhelmingly institutional: researchers, hospital systems, and public biomedical data services, not residential subscribers.
Interesting
- Registered with ARIN in 1994, from the era when large federal science agencies connected to the internet directly rather than through a commercial carrier.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-11-03, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 63 prefixes · 325K addresses IPv6 6 prefixes
| Country | Name | Prefixes |
|---|---|---|
| US | United States of America | 69 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS3527- Registry name
- NIH-NET
- Registrant
- National Institutes of Health
- Abuse contact
- citnsarin@mail.nih.gov
- Registered
- 1994-04-07
- Last changed
- 2022-10-28
- Allocation
- assigned
Declared
PeeringDB profile
- Name
- National Institutes of Health
- Scope
- Not Disclosed
- Traffic ratio
- Not Disclosed
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 81% valid · 13 valid, 3 with no ROA
- ROAs
- 20 authorising AS3527
- ASPA
- no ASPA record
- IRR
- 100% registered · 16 of 16 announcements
- Route objects
- 48 naming AS3527
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 451 networks and 1,853 prefixes, as published 2026-11-04. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere