ASN AS21557 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21557?

AS21557 is listed under Cybernet Communications, Inc..

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?

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AS21557 Cybernet Communications, Inc.

ASN Lookup Tool

Cybernet Communications, Inc. cybernetcom.com

US 39 Routes

AS Data

AS21557

AS21557 – Cybernet Communications, Inc.

AS Number	21557
AS Name	CYB-BLK-1
Organization	Cybernet Communications, Inc.(cyber-80)
Country	US
Website	cybernetcom.com
Number of IPv4 Routes	35
Number of IPv6 Routes	4
ASN type	ISP
Registry	ARIN
Date Allocated	2006-12-07

ASN Intelligence API for production workflows

Use ASN data for AS21557 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
147.92.124.0/22	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	1024
2605:5300:500::/40	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	~309×10²⁴
162.219.203.0/24	AS21557	Cybernet Communications, Inc.	MainBuilding	256
75.127.62.0/24	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	256
64.15.213.0/24	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	256
64.15.212.0/24	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	256
147.92.120.0/22	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	1024
104.218.191.0/24	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	256
104.218.188.0/22	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	1024
75.127.54.0/24	AS21557	Cybernet Communications, Inc.	Cybernet Communications, Inc.	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:       21557
ASName:         CYB-BLK-1
ASHandle:       AS21557
RegDate:        2006-12-07
Updated:        2012-03-02
Comment:        http://www.cybernetcom.com    
Ref:            https://rdap.arin.net/registry/autnum/21557


OrgName:        Cybernet Communications, Inc.
OrgId:          CYBER-80
Address:        7750 Gloria Ave
City:           Van Nuys
StateProv:      CA
PostalCode:     91406
Country:        US
RegDate:        2006-08-30
Updated:        2021-10-20
Ref:            https://rdap.arin.net/registry/entity/CYBER-80


OrgNOCHandle: HAKIM50-ARIN
OrgNOCName:   Hakimi, Daniel 
OrgNOCPhone:  +1-310-828-9900 
OrgNOCEmail:  daniel.hakimi@cybernetcom.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/HAKIM50-ARIN

OrgTechHandle: BHA263-ARIN
OrgTechName:   Hakimi, Bruce 
OrgTechPhone:  +1-310-828-2288 
OrgTechEmail:  bruce@cybernetcom.com
OrgTechRef:    https://rdap.arin.net/registry/entity/BHA263-ARIN

OrgAbuseHandle: BHA263-ARIN
OrgAbuseName:   Hakimi, Bruce 
OrgAbusePhone:  +1-310-828-2288 
OrgAbuseEmail:  bruce@cybernetcom.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/BHA263-ARIN

OrgNOCHandle: ADMIN2766-ARIN
OrgNOCName:   ADMINISTRATOR
OrgNOCPhone:  +1-310-828-9900 
OrgNOCEmail:  ne@infonetworks.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ADMIN2766-ARIN

OrgTechHandle: ADMIN2766-ARIN
OrgTechName:   ADMINISTRATOR
OrgTechPhone:  +1-310-828-9900 
OrgTechEmail:  ne@infonetworks.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ADMIN2766-ARIN

OrgAbuseHandle: ADMIN2766-ARIN
OrgAbuseName:   ADMINISTRATOR
OrgAbusePhone:  +1-310-828-9900 
OrgAbuseEmail:  ne@infonetworks.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ADMIN2766-ARIN

RTechHandle: CHA112-ARIN
RTechName:   Hayden, Collin 
RTechPhone:  +1-310-828-9900 
RTechEmail:  collin@cybernetcom.com
RTechRef:    https://rdap.arin.net/registry/entity/CHA112-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
AS6939	Hurricane Electric LLC	US
AS6461	Zayo Bandwidth	US
AS174	Cogent Communications, LLC	US

Upstreams

AS Number	Description	Country
AS6939	Hurricane Electric LLC	US
AS6461	Zayo Bandwidth	US
AS174	Cogent Communications, LLC	US