AS3527 National Institutes of Health

NIH-NET

IPv4 Addresses: 336,640

Number of Peers: 5

Number of Prefixes: 18

ASN Allocated: Assigned

ASN
Prefixes
Peers
Upstreams
Downstreams
Graphs
World Map
Raw Whois

AS3527 Summary

Regional Registry:

IANA

Allocation Status:

Assigned

AS3527 Network

IPv4 Prefixes:

IPv4 Peers:

IPv4 Upstreams:

IPv6 Prefixes:

IPv6 Peers:

IPv6 Upstreams:

Contacts

Email Contacts:

irt@nih.gov

hostmaster@list.nih.gov

citnsarin@mail.nih.gov

nih-domain-admin@list.nih.gov

Abuse Contacts:

irt@nih.gov

Address:

9000 Rockville Pike,

MSC 4805,

Bethesda,

MD,

20892-4805,

IPv4 Prefixes
IPv6 Prefixes

Announced Prefix	Description	Parent Prefix	RIR
128.231.0.0/16	National Institutes of Health	128.231.0.0/16	ARIN
128.231.3.0/24	National Institutes of Health	128.231.0.0/16	ARIN
128.231.245.0/24	National Institutes of Health	128.231.0.0/16	ARIN
137.187.0.0/16	National Institutes of Health	137.187.0.0/16	ARIN
156.40.0.0/16	Various Registries (Maintained by ARIN)	156.40.0.0/18	ARIN
157.98.0.0/16	National Institute of Environmental Health Sciences	157.98.0.0/16	ARIN
162.99.224.0/19	HRSA	162.99.0.0/16	ARIN
165.112.0.0/20	National Institutes of Health	165.19.0.0/16	ARIN
165.112.0.0/16	National Institutes of Health	165.112.0.0/16	ARIN
165.112.0.0/21	National Institutes of Health	165.112.0.0/16	ARIN
165.112.136.0/21	National Institutes of Health	165.112.0.0/16	ARIN
165.112.137.0/24	National Institutes of Health	165.112.0.0/16	ARIN
165.112.138.0/24	National Institutes of Health	165.112.0.0/16	ARIN
192.231.145.0/24	National Institutes of Health	192.231.145.0/24	ARIN
192.231.146.0/24	National Institutes of Health	192.231.146.0/24	ARIN
192.231.146.0/23	Various Registries (Maintained by ARIN)	192.231.146.0/24	ARIN
192.231.147.0/24	National Institutes of Health	192.231.147.0/24	ARIN

Country	Announced Prefix	Description	Valid ROA	Parent Prefix	RIR
	2607:f220:400::/43	National Institutes of Health		2607:f220::/32	ARIN

IPv4 Peers
IPv6 Peers

ASN	Name	Description
AS6150	NCIFCRF	National Cancer Institute
AS10886	MAX-GIGAPOP	University of Maryland
AS19050	TIC-DHHS-INTERIOR	U.S. Department of Health & Human Services

Country	ASN	Name	Description	IPv4
	AS19050	TIC-DHHS-INTERIOR	U.S. Department of Health & Human Services
	AS10886	MAX-GIGAPOP	University of Maryland

IPv4 Upstreams
IPv6 Upstreams

Country	ASN	Name	Description	IPv6
	AS19050	TIC-DHHS-INTERIOR	U.S. Department of Health & Human Services
	AS10886	MAX-GIGAPOP	University of Maryland

IPv4 Upstream Graph

Country	ASN	Name	Description	IPv4
	AS19050	TIC-DHHS-INTERIOR	U.S. Department of Health & Human Services

IPv6 Upstream Graph

IPv4 Downstreams

Country	ASN	Name	Description
	AS6150	NCIFCRF	National Cancer Institute

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#


ASNumber:       3527
ASName:         NIH-NET
ASHandle:       AS3527
RegDate:        1994-04-07
Updated:        2022-10-28    
Ref:            https://rdap.arin.net/registry/autnum/3527


OrgName:        National Institutes of Health
OrgId:          NIH-Z
Address:        9000 Rockville Pike
Address:        MSC 4805
City:           Bethesda
StateProv:      MD
PostalCode:     20892-4805
Country:        US
RegDate:        2022-10-09
Updated:        2022-10-09
Ref:            https://rdap.arin.net/registry/entity/NIH-Z


OrgAbuseHandle: NIHIR-ARIN
OrgAbuseName:   NIH IRT
OrgAbusePhone:  +1-301-881-9726 
OrgAbuseEmail:  irt@nih.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NIHIR-ARIN

OrgRoutingHandle: NDAND-ARIN
OrgRoutingName:   NIH DNS Administrators, NIH DNS 
OrgRoutingPhone:  +1-301-435-1970 
OrgRoutingEmail:  hostmaster@list.nih.gov
OrgRoutingRef:    https://rdap.arin.net/registry/entity/NDAND-ARIN

OrgTechHandle: NIHTE-ARIN
OrgTechName:   NIHtechs
OrgTechPhone:  +1-301-402-3141 
OrgTechEmail:  citnsarin@mail.nih.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/NIHTE-ARIN

OrgNOCHandle: NOC228-ARIN
OrgNOCName:   Network Operations Center
OrgNOCPhone:  +1-301-402-3141 
OrgNOCEmail:  NIH-DOMAIN-ADMIN@list.nih.gov
OrgNOCRef:    https://rdap.arin.net/registry/entity/NOC228-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2025, American Registry for Internet Numbers, Ltd.
#

Country	IX	Name	IPv4	IPv6	Port Speed