ASN Lookup Tool

County of Marin marincounty.gov US US 9 Routes

AS Data

AS10309

AS10309 – County of Marin

AS Number 10309
AS Name MARIN-MIDAS
Organization County of Marin(county-59)
Country US
Website marincounty.gov
Number of IPv4 Routes 9
Number of IPv6 Routes 0
ASN type GOVERNMENT
Registry ARIN
Date Allocated 1997-06-23

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Use ASN data for AS10309 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route # IPs
107.0.46.0/23 512
199.88.116.0/23 512
199.88.64.0/21 2048
199.88.118.0/24 256
199.88.88.0/22 1024
199.88.72.0/22 1024
199.88.80.0/21 2048
199.88.113.0/24 256
199.88.120.0/23 512

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:       10309
ASName:         MARIN-MIDAS
ASHandle:       AS10309
RegDate:        1997-06-23
Updated:        1997-06-23    
Ref:            https://rdap.arin.net/registry/autnum/10309


OrgName:        County of Marin
OrgId:          COUNTY-59
Address:        3501 Cicic Center Dr
City:           San Rafael
StateProv:      CA
PostalCode:     94903
Country:        US
RegDate:        1997-06-23
Updated:        2023-06-06
Ref:            https://rdap.arin.net/registry/entity/COUNTY-59


OrgAbuseHandle: ZC209-ARIN
OrgAbuseName:   County of Marin
OrgAbusePhone:  +1-415-473-3627 
OrgAbuseEmail:  jason.balderama@marincounty.gov
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ZC209-ARIN

OrgTechHandle: ZC209-ARIN
OrgTechName:   County of Marin
OrgTechPhone:  +1-415-473-3627 
OrgTechEmail:  jason.balderama@marincounty.gov
OrgTechRef:    https://rdap.arin.net/registry/entity/ZC209-ARIN

RTechHandle: JN1916-ARIN
RTechName:   Nakashige, Jan 
RTechPhone:  +1-415-499-6302 
RTechEmail:  jnakashi@marin.org
RTechRef:    https://rdap.arin.net/registry/entity/JN1916-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
AS33667 Comcast Cable Communications, LLC US
AS7018 AT&T Enterprises, LLC US
AS33651 Comcast Cable Communications, LLC US

Upstreams

AS Number Description Country
AS33667 Comcast Cable Communications, LLC US
AS7018 AT&T Enterprises, LLC US
AS33651 Comcast Cable Communications, LLC US

Legacy Routes

199.88.79.0/24 199.88.114.0/23 199.88.76.0/23

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Frequently Asked Questions

ASN AS10309 is an Autonomous System Number used to identify a network for BGP internet routing.
AS10309 is listed under County of Marin.
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.