What is ASN AS399373?

ASN AS399373 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS399373?

AS399373 is listed under Gigcasters LLC.

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.

AS399373 Gigcasters LLC | IPGeolocation.io

ASN Lookup Tool

Gigcasters LLC gigcasters.com

US 1 Routes

AS Data

AS399373

AS399373 – Gigcasters LLC

AS Number	399373
AS Name	GIGCASTAUS-01
Organization	Gigcasters LLC(gl-953)
Country	US
Website	gigcasters.com
Number of IPv4 Routes	1
Number of IPv6 Routes	0
ASN type	ISP
Registry	ARIN
Date Allocated	2025-06-04

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Use ASN data for AS399373 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
172.252.108.0/24	AS399373	Gigcasters LLC	Gigcasters LLC	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:       399373
ASName:         GIGCASTAUS-01
ASHandle:       AS399373
RegDate:        2025-06-04
Updated:        2025-06-04    
Ref:            https://rdap.arin.net/registry/autnum/399373


OrgName:        Gigcasters LLC
OrgId:          GL-953
Address:        115 Wild Basin Rd Suite 102
City:           Austin
StateProv:      TX
PostalCode:     78746
Country:        US
RegDate:        2025-05-29
Updated:        2025-06-02
Ref:            https://rdap.arin.net/registry/entity/GL-953


OrgNOCHandle: NOC33997-ARIN
OrgNOCName:   NOC
OrgNOCPhone:  +1-512-234-3090 
OrgNOCEmail:  noc@gigcasters.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/NOC33997-ARIN

OrgTechHandle: NOC33997-ARIN
OrgTechName:   NOC
OrgTechPhone:  +1-512-234-3090 
OrgTechEmail:  noc@gigcasters.com
OrgTechRef:    https://rdap.arin.net/registry/entity/NOC33997-ARIN

OrgAbuseHandle: NOC33997-ARIN
OrgAbuseName:   NOC
OrgAbusePhone:  +1-512-234-3090 
OrgAbuseEmail:  noc@gigcasters.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/NOC33997-ARIN

OrgDNSHandle: NOC33997-ARIN
OrgDNSName:   NOC
OrgDNSPhone:  +1-512-234-3090 
OrgDNSEmail:  noc@gigcasters.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/NOC33997-ARIN

OrgRoutingHandle: NOC33997-ARIN
OrgRoutingName:   NOC
OrgRoutingPhone:  +1-512-234-3090 
OrgRoutingEmail:  noc@gigcasters.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/NOC33997-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
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US
AS25956	Logix	US

Upstreams

AS Number	Description	Country
AS3356	Level 3 Parent, LLC	US
AS174	Cogent Communications, LLC	US
AS25956	Logix	US