ASN AS21547 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS21547?

AS21547 is listed under FirstLight Fiber, 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?

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.

AS21547 FirstLight Fiber, Inc.

ASN Lookup Tool

FirstLight Fiber, Inc. firstlight.net

US 73 Routes

AS Data

AS21547

AS21547 – FirstLight Fiber, Inc.

AS Number	21547
AS Name	OXNET
Organization	FirstLight Fiber, Inc.(tvc-11)
Country	US
Website	firstlight.net
Number of IPv4 Routes	68
Number of IPv6 Routes	5
ASN type	ISP
Registry	ARIN
Date Allocated	2001-05-21

ASN Intelligence API for production workflows

Use ASN data for AS21547 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
74.220.236.0/24	AS21547	FirstLight Fiber, Inc.	FirstLight Fiber, Inc.	256
208.17.26.0/23	AS21547	FirstLight Fiber, Inc.	Cogent Communications IPENG	512
198.212.230.0/24	AS21547	FirstLight Fiber, Inc.	Concord Hospital	256
140.165.50.0/24	AS21547	FirstLight Fiber, Inc.	Teledyne Brown Engineering	256
69.49.148.0/24	AS21547	FirstLight Fiber, Inc.	FirstLight Fiber, Inc.	256
66.231.192.0/19	AS21547	FirstLight Fiber, Inc.	RedZone Wireless	8192
72.12.78.0/24	AS21547	FirstLight Fiber, Inc.	FirstLight Fiber, Inc.	256
72.12.80.0/24	AS21547	FirstLight Fiber, Inc.	FirstLight Fiber, Inc.	256
69.49.128.0/19	AS21547	FirstLight Fiber, Inc.	FirstLight Fiber, Inc.	8192
69.49.129.0/24	AS21547	FirstLight Fiber, Inc.	FirstLight Fiber, 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:       21547
ASName:         OXNET
ASHandle:       AS21547
RegDate:        2001-05-21
Updated:        2019-06-10    
Ref:            https://rdap.arin.net/registry/autnum/21547


OrgName:        FirstLight Fiber, Inc.
OrgId:          TVC-11
Address:        12 Metro Park Road
City:           Albany
StateProv:      NY
PostalCode:     12205
Country:        US
RegDate:        2004-09-27
Updated:        2026-02-23
Ref:            https://rdap.arin.net/registry/entity/TVC-11


OrgDNSHandle: HDP11-ARIN
OrgDNSName:   Hostmaster, the DNS people
OrgDNSPhone:  +1-518-694-8790 
OrgDNSEmail:  dnsupdates@firstlight.net
OrgDNSRef:    https://rdap.arin.net/registry/entity/HDP11-ARIN

OrgNOCHandle: NOC1665-ARIN
OrgNOCName:   NOC
OrgNOCPhone:  +1-518-694-8790 
OrgNOCEmail:  noc@firstlight.net
OrgNOCRef:    https://rdap.arin.net/registry/entity/NOC1665-ARIN

OrgAbuseHandle: ABUSE719-ARIN
OrgAbuseName:   Abuse
OrgAbusePhone:  +1-518-694-8790 
OrgAbuseEmail:  ipabuse@firstlight.net
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ABUSE719-ARIN

OrgTechHandle: IA93-ARIN
OrgTechName:   IP Admin
OrgTechPhone:  +1-518-694-8790 
OrgTechEmail:  ip-admin@firstlight.net
OrgTechRef:    https://rdap.arin.net/registry/entity/IA93-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
AS36787	Hearst-Argyle Television, Inc.	US
AS36501	GARMIN INTERNATIONAL INC.	US
AS18803	Tyler Technologies, Inc.	US
AS395342	Exeter Hospital	US
AS36787	Hearst Argyle Television, Inc.	US
AS36823	Martin's Point HealthCare	US
AS13536	FirstLight Fiber, Inc.	US

Upstreams

AS Number	Description	Country
AS13536	FirstLight Fiber, Inc.	US

Downstreams

AS Number	Description	Country
AS36501	GARMIN INTERNATIONAL INC.	US
AS18803	Tyler Technologies, Inc.	US
AS395342	Exeter Hospital	US
AS36787	Hearst Argyle Television, Inc.	US
AS36823	Martin's Point HealthCare	US

Contacts

Email Contacts

ip-admin@firstlight.net

Abuse Contacts

ipabuse@firstlight.net

Legacy Routes

206.147.101.0/24