What is ASN AS398991?

ASN AS398991 is an Autonomous System Number used to identify a network for BGP internet routing.

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.

AS398991 X99 | IPGeolocation.io

ASN Lookup Tool

X99 x99.cloud

US 63 Routes

AS Data

AS398991

AS398991 – X99

AS Number	398991
AS Name	X99-US
Organization	X99(xil-3)
Country	US
Website	x99.cloud
Number of IPv4 Routes	57
Number of IPv6 Routes	6
ASN type	ISP
Registry	ARIN
Date Allocated	2024-02-22

ASN Intelligence API for production workflows

Use ASN data for AS398991 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
209.131.123.0/24	AS398991	Internap Holding LLC	X99	256
2607:a540:a000::/38	AS398991	X99	X	~1×10²⁷
38.99.238.0/23	AS398991	X99	X99 US LLC	512
38.247.68.0/24	AS398991	X99	WORLD SISTEM TELECOM WST S.A.S.	256
38.183.189.0/24	AS398991	X99	X99 US LLC	256
38.183.188.0/23	AS398991	X99	X99 US LLC	512
209.131.122.0/23	AS398991	Internap Holding LLC	X99	512
199.245.234.0/24	AS398991	Aptum Technologies	X99	256
208.122.19.0/24	AS398991	X99	X	256
2607:a540::/33	AS398991	X99	X	~40×10²⁷

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:       398991
ASName:         X99-US
ASHandle:       AS398991
RegDate:        2024-02-22
Updated:        2024-02-22    
Ref:            https://rdap.arin.net/registry/autnum/398991


OrgName:        X99
OrgId:          XIL-3
Address:        800 N King Street, Suite 304 1938
City:           Wilmington
StateProv:      DE
PostalCode:     19801
Country:        US
RegDate:        2024-02-02
Updated:        2024-02-15
Ref:            https://rdap.arin.net/registry/entity/XIL-3


OrgAbuseHandle: NAX-ARIN
OrgAbuseName:   Network Abuse - X99
OrgAbusePhone:  +1-512-890-1509 
OrgAbuseEmail:  netabuse@x99.cloud
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NAX-ARIN

OrgTechHandle: NOCX1-ARIN
OrgTechName:   NOC X99
OrgTechPhone:  +1-512-890-1509 
OrgTechEmail:  noc@x99cloud.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NOCX1-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

Peers

AS Number	Description	Country
AS6762	TELECOM ITALIA SPARKLE S.p.A.	IT
AS7195	EDGEUNO S.A.S	CO
AS6939	Hurricane Electric LLC	US
AS22356	Durand do Brasil Ltda	BR
AS14537	Continent 8 LLC	US
AS4230	CLARO S.A.	BR
AS37468	Angola Cables	AO
AS199524	G-Core Labs S.A.	LU
AS14907	Wikimedia Foundation Inc.	US
AS394177	SHIFT HOSTING LLC	US

Upstreams

AS Number	Description	Country
AS60068	Datacamp Limited	GB
AS64126	DOMINICAN TELECOM PRIME, DTP, S.R.L.	DO
AS264409	GRUPO YAX	BR
AS58453	China Mobile International Limited	HK
AS6762	TELECOM ITALIA SPARKLE S.p.A.	IT
AS7195	EDGEUNO S.A.S	CO
AS263237	PowerHost Telecom SPA	CL
AS25091	IP Max SA	CH
AS6939	Hurricane Electric LLC	US
AS2914	NTT America, Inc.	US