ASN AS25984 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS25984?

AS25984 is listed under MedStar Health.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS25984 MedStar Health | IPGeolocation.io

ASN Lookup Tool

MedStar Health medstar.net

US 9 Routes

AS Data

AS25984

AS25984 – MedStar Health

AS Number	25984
AS Name	MEDSTARHEALTH
Organization	MedStar Health (medsta-4)
Country	US
Website	medstar.net
Number of IPv4 Routes	9
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2002-06-12

ASN Intelligence API for production workflows

Use ASN data for AS25984 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
198.50.74.0/24	AS25984	MedStar Health	MedStar Health	256
198.50.93.0/26	AS25984	MedStar Health	MedStar Health	64
198.133.139.0/24	AS25984	MedStar Health	MedStar Health	256
198.99.32.0/24	AS25984	MedStar Health	MedStar Health	256
198.99.54.0/23	AS25984	MedStar Health	MedStar Health	512
198.50.94.0/24	AS25984	MedStar Health	MedStar Health	256
198.50.64.0/24	AS25984	MedStar Health	MedStar Health	256
198.99.40.0/24	AS25984	MedStar Health	MedStar Health	256
198.50.73.0/24	AS25984	MedStar Health	MedStar Health	256

Raw Whois Response

#
# 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 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       25984
ASName:         MEDSTARHEALTH
ASHandle:       AS25984
RegDate:        2002-06-12
Updated:        2012-03-20
Ref:            https://rdap.arin.net/registry/autnum/25984


OrgName:        MedStar Health
OrgId:          MEDSTA-4
Address:        2331 Broadbirch Drive
City:           Silver Spring
StateProv:      MD
PostalCode:     20904
Country:        US
RegDate:        2002-06-12
Updated:        2025-07-22
Ref:            https://rdap.arin.net/registry/entity/MEDSTA-4


OrgTechHandle: ADMIN9072-ARIN
OrgTechName:   admin
OrgTechPhone:  +1-410-772-6500 
OrgTechEmail:  steven.steiner@medstar.net
OrgTechRef:    https://rdap.arin.net/registry/entity/ADMIN9072-ARIN

OrgAbuseHandle: JJA63-ARIN
OrgAbuseName:   Jakobowski, Jeff 
OrgAbusePhone:  +1-301-680-7737 
OrgAbuseEmail:  jaj4@medstar.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/JJA63-ARIN

OrgTechHandle: JJA63-ARIN
OrgTechName:   Jakobowski, Jeff 
OrgTechPhone:  +1-301-680-7737 
OrgTechEmail:  jaj4@medstar.net
OrgTechRef:    https://rdap.arin.net/registry/entity/JJA63-ARIN

RTechHandle: JK1698-ARIN
RTechName:   Kuhar, Jim 
RTechPhone:  +1-301-680-7743 
RTechEmail:  Jim.L.Kuhar@medstar.net
RTechRef:    https://rdap.arin.net/registry/entity/JK1698-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 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "25984",
    "as_handle" : "AS25984",
    "as_name" : "MEDSTARHEALTH",
    "tech_contacts" : [ "ADMIN9072-ARIN", "JJA63-ARIN", "JK1698-ARIN" ],
    "abuse_contacts" : [ "JJA63-ARIN" ],
    "date_created" : "2002-06-12",
    "date_updated" : "2012-03-20",
    "source" : "https://rdap.arin.net/registry/autnum/25984"
  } ],
  "organization" : {
    "handle" : "MEDSTA-4",
    "name" : "MedStar Health",
    "address" : [ "2331 Broadbirch Drive", "Silver Spring", "MD", "20904", "US" ],
    "street" : "Broadbirch Drive",
    "city" : "Silver Spring",
    "state" : "MD",
    "zip_code" : "20904",
    "country" : [ "US" ],
    "date_created" : "2002-06-12",
    "date_updated" : "2025-07-22",
    "source" : "https://rdap.arin.net/registry/entity/MEDSTA-4",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "ADMIN9072-ARIN",
    "name" : "admin",
    "email" : [ "steven.steiner@medstar.net" ],
    "phone" : [ "+1-410-772-6500" ],
    "source" : "https://rdap.arin.net/registry/entity/ADMIN9072-ARIN"
  }, {
    "handle" : "JJA63-ARIN",
    "name" : "Jakobowski, Jeff",
    "email" : [ "jaj4@medstar.net" ],
    "phone" : [ "+1-301-680-7737" ],
    "source" : "https://rdap.arin.net/registry/entity/JJA63-ARIN"
  }, {
    "handle" : "JK1698-ARIN",
    "name" : "Kuhar, Jim",
    "email" : [ "Jim.L.Kuhar@medstar.net" ],
    "phone" : [ "+1-301-680-7743" ],
    "source" : "https://rdap.arin.net/registry/entity/JK1698-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "JJA63-ARIN",
    "name" : "Jakobowski, Jeff",
    "email" : [ "jaj4@medstar.net" ],
    "phone" : [ "+1-301-680-7737" ],
    "source" : "https://rdap.arin.net/registry/entity/JJA63-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS15830	Equinix (EMEA) Acquisition Enterprises B.V.	NL
AS701	Verizon Business/UUnet	US
AS701	Verizon Business	US
AS33657	Comcast Cable Communications, LLC	US

Upstreams

AS Number	Description	Country
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS701	Verizon Business	US
AS33657	Comcast Cable Communications, LLC	US