ASN AS21738 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21738?

AS21738 is listed under Rozint.

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.

AS21738 Rozint | IPGeolocation.io

ASN Lookup Tool

Rozint rozint.cloud

US 15 Routes

AS Data

AS21738

AS21738 – Rozint

AS Number	21738
AS Name	ROZINT
Organization	Rozint(rl-895)
Country	US
Website	rozint.cloud
Number of IPv4 Routes	10
Number of IPv6 Routes	5
ASN type	ISP
Registry	ARIN
Date Allocated	2023-03-17

ASN Intelligence API for production workflows

Use ASN data for AS21738 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
185.125.142.0/24	AS21738	Rozint	F4 Networks, LLC	256
216.40.95.0/24	AS21738	Rozint	F4 Networks	256
140.235.156.0/24	AS21738	Rozint	Rozint	256
2602:2b7:d00::/40	AS21738	Rozint	Rozint	~309×10²⁴
2602:2b7:e1::/48	AS21738	Rozint	Rozint	~1×10²⁴
216.40.92.0/23	AS21738	Rozint	F4 Networks	512
216.40.94.0/24	AS21738	Rozint	F4 Networks	256
23.150.40.0/24	AS21738	Rozint	Rozint	256
2.59.255.0/24	AS21738	Rozint	F4 Networks, LLC	256
2602:2b7:e2::/48	AS21738	Rozint	Rozint	~1×10²⁴

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:       21738
ASName:         ROZINT
ASHandle:       AS21738
RegDate:        2023-03-17
Updated:        2023-03-17
Comment:        https://rozint.com    
Ref:            https://rdap.arin.net/registry/autnum/21738


OrgName:        Rozint
OrgId:          RL-895
Address:        30 N Gould St Ste R
City:           Sheridan
StateProv:      WY
PostalCode:     82801
Country:        US
RegDate:        2023-03-13
Updated:        2025-03-24
Comment:        https://rozint.com
Ref:            https://rdap.arin.net/registry/entity/RL-895


OrgAbuseHandle: NAD115-ARIN
OrgAbuseName:   Network Abuse Department
OrgAbusePhone:  +1-808-909-8289 
OrgAbuseEmail:  abuse@rozint.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NAD115-ARIN

OrgTechHandle: ITDEP305-ARIN
OrgTechName:   IT Department
OrgTechPhone:  +1-808-909-8289 
OrgTechEmail:  it@rozint.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ITDEP305-ARIN

OrgNOCHandle: NOC33603-ARIN
OrgNOCName:   Network Operations Center
OrgNOCPhone:  +1-808-909-8289 
OrgNOCEmail:  noc@rozint.cloud
OrgNOCRef:    https://rdap.arin.net/registry/entity/NOC33603-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
AS151349	Yuki Network Ltd	KR
AS216096	Alex Terrats Ciberseguretat SLU	AD
AS58057	Securebit AG	CH
AS2906	Netflix Streaming Services Inc.	US
AS200242	Ember Ana Reimer	DE
AS393577	Tritan Development	US
AS30110	Advanced Communications Technology	US
AS21928	T-Mobile USA, Inc.	US
AS393775	IP Pathways, LLC	US
AS207852	Yonghan Ching	MY

Upstreams

AS Number	Description	Country
AS52025	ParadoxNetworks Limited	GB
AS1299	Arelion Sweden AB	SE
AS6939	Hurricane Electric LLC	US
AS64289	Macarne.com	US
AS32621	Twin City VoIP, Inc.	US
AS32097	WholeSale Internet, Inc.	US

Downstreams

AS Number	Description	Country
AS401710	CloudMesh Labs LLC	US
AS151349	Yuki Network Ltd	KR
AS216096	Alex Terrats Ciberseguretat SLU	AD
AS30690	Kazehana Networks LLC	US
AS58057	Securebit AG	CH
AS215527	Xero Networks LTD	GB
AS14923	Graham Technology Solutions LLC	US
AS200242	Ember Ana Reimer	DE
AS207852	Yonghan Ching	MY
AS214022	Joseph Rawlings trading as Virtnet.bond	US