ASN Lookup Tool

Zayo Bandwidth zayo.com US US 4 Routes

AS Data

AS16503

AS16503 – Zayo Bandwidth

AS Number 16503
AS Name ZAYO-16503
Organization Zayo Bandwidth(zayob)
Country US
Website zayo.com
Number of IPv4 Routes 4
Number of IPv6 Routes 0
ASN type ISP
Registry ARIN
Date Allocated 2000-05-04

ASN Intelligence API for production workflows

Use ASN data for AS16503 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
64.124.127.0/24 256
66.45.192.0/19 8192
64.20.96.0/19 8192
216.178.48.0/20 4096

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:       16503
ASName:         ZAYO-16503
ASHandle:       AS16503
RegDate:        2000-05-04
Updated:        2016-09-07    
Ref:            https://rdap.arin.net/registry/autnum/16503


OrgName:        Zayo Bandwidth
OrgId:          ZAYOB
Address:        1401 Wynkoop St.
Address:        #500
City:           Denver
StateProv:      CO
PostalCode:     80202
Country:        US
RegDate:        2007-10-12
Updated:        2024-11-25
Ref:            https://rdap.arin.net/registry/entity/ZAYOB


OrgTechHandle: ZIE-ARIN
OrgTechName:   Zayo IP Engineering
OrgTechPhone:  +1-866-236-2824 
OrgTechEmail:  ipeng@zayo.com
OrgTechRef:    https://rdap.arin.net/registry/entity/ZIE-ARIN

OrgNOCHandle: ZIE-ARIN
OrgNOCName:   Zayo IP Engineering
OrgNOCPhone:  +1-866-236-2824 
OrgNOCEmail:  ipeng@zayo.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/ZIE-ARIN

OrgAbuseHandle: ABUSE5675-ARIN
OrgAbuseName:   Abuse
OrgAbusePhone:  +1-866-236-2824 
OrgAbuseEmail:  abuse@zayo.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE5675-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
AS19092 Zayo Bandwidth US

Upstreams

AS Number Description Country
AS19092 Zayo Bandwidth US

Contacts

Email Contacts

ipeng@zayo.com

Abuse Contacts

abuse@zayo.com

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Frequently Asked Questions

ASN AS16503 is an Autonomous System Number used to identify a network for BGP internet routing.
AS16503 is listed under Zayo Bandwidth.
Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.
Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.
WHOIS provides registration and contact context for ASN ownership, administration, and operational reference.
This page previews large ASN datasets. Use See more to load additional rows, and upgrade your plan to view complete peer, route, upstream, and downstream data.