What is ASN AS395323?

ASN AS395323 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS395323?

AS395323 is listed under County of San Mateo.

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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AS395323 County of San Mateo | IPGeolocation.io

ASN Lookup Tool

County of San Mateo smcgov.org

US 3 Routes

AS Data

AS395323

AS395323 – County of San Mateo

AS Number	395323
AS Name	SMC
Organization	County of San Mateo (csm-13)
Country	US
Website	smcgov.org
Number of IPv4 Routes	3
Number of IPv6 Routes	0
ASN type	GOVERNMENT
Registry	ARIN
Date Allocated	2016-06-28

ASN Intelligence API for production workflows

Use ASN data for AS395323 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
204.114.32.0/20	AS395323	County of San Mateo	County of San Mateo	4096
204.114.48.0/20	AS395323	County of San Mateo	County of San Mateo	4096
204.114.32.0/19	AS395323	County of San Mateo	County of San Mateo	8192

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:       395323
ASName:         SMC
ASHandle:       AS395323
RegDate:        2016-06-28
Updated:        2016-06-28
Ref:            https://rdap.arin.net/registry/autnum/395323


OrgName:        County of San Mateo
OrgId:          CSM-13
Address:        455 County Government Center
City:           Redwood City
StateProv:      CA
PostalCode:     94063
Country:        US
RegDate:        1994-03-10
Updated:        2026-01-21
Ref:            https://rdap.arin.net/registry/entity/CSM-13


OrgTechHandle: YUSON6-ARIN
OrgTechName:   Yuson, Anthony 
OrgTechPhone:  +1-650-599-1065 
OrgTechEmail:  ayuson@smcgov.org
OrgTechRef:    https://rdap.arin.net/registry/entity/YUSON6-ARIN

OrgNOCHandle: YUSON6-ARIN
OrgNOCName:   Yuson, Anthony 
OrgNOCPhone:  +1-650-599-1065 
OrgNOCEmail:  ayuson@smcgov.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/YUSON6-ARIN

OrgTechHandle: POSTE14-ARIN
OrgTechName:   Postelnicu, Ana 
OrgTechPhone:  +1-650-766-3815 
OrgTechEmail:  apostelnicu@smcgov.org
OrgTechRef:    https://rdap.arin.net/registry/entity/POSTE14-ARIN

OrgNOCHandle: POSTE14-ARIN
OrgNOCName:   Postelnicu, Ana 
OrgNOCPhone:  +1-650-766-3815 
OrgNOCEmail:  apostelnicu@smcgov.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/POSTE14-ARIN

OrgAbuseHandle: CSMNS-ARIN
OrgAbuseName:   County of San Mate Network Service
OrgAbusePhone:  +1-650-995-3821 
OrgAbuseEmail:  ISD_Network@smcgov.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/CSMNS-ARIN

OrgRoutingHandle: POSTE14-ARIN
OrgRoutingName:   Postelnicu, Ana 
OrgRoutingPhone:  +1-650-766-3815 
OrgRoutingEmail:  apostelnicu@smcgov.org
OrgRoutingRef:    https://rdap.arin.net/registry/entity/POSTE14-ARIN

OrgDNSHandle: POSTE14-ARIN
OrgDNSName:   Postelnicu, Ana 
OrgDNSPhone:  +1-650-766-3815 
OrgDNSEmail:  apostelnicu@smcgov.org
OrgDNSRef:    https://rdap.arin.net/registry/entity/POSTE14-ARIN

OrgAbuseHandle: POSTE14-ARIN
OrgAbuseName:   Postelnicu, Ana 
OrgAbusePhone:  +1-650-766-3815 
OrgAbuseEmail:  apostelnicu@smcgov.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/POSTE14-ARIN

OrgTechHandle: CSMNS-ARIN
OrgTechName:   County of San Mate Network Service
OrgTechPhone:  +1-650-995-3821 
OrgTechEmail:  ISD_Network@smcgov.org
OrgTechRef:    https://rdap.arin.net/registry/entity/CSMNS-ARIN

OrgNOCHandle: CSMNS-ARIN
OrgNOCName:   County of San Mate Network Service
OrgNOCPhone:  +1-650-995-3821 
OrgNOCEmail:  ISD_Network@smcgov.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/CSMNS-ARIN

OrgNOCHandle: MOHAM115-ARIN
OrgNOCName:   Mohammed, Omer 
OrgNOCPhone:  +1-510-385-5373 
OrgNOCEmail:  omohammed@smcgov.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/MOHAM115-ARIN

OrgAbuseHandle: MOHAM115-ARIN
OrgAbuseName:   Mohammed, Omer 
OrgAbusePhone:  +1-510-385-5373 
OrgAbuseEmail:  omohammed@smcgov.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MOHAM115-ARIN

OrgRoutingHandle: YUSON6-ARIN
OrgRoutingName:   Yuson, Anthony 
OrgRoutingPhone:  +1-650-599-1065 
OrgRoutingEmail:  ayuson@smcgov.org
OrgRoutingRef:    https://rdap.arin.net/registry/entity/YUSON6-ARIN

OrgTechHandle: MOHAM115-ARIN
OrgTechName:   Mohammed, Omer 
OrgTechPhone:  +1-510-385-5373 
OrgTechEmail:  omohammed@smcgov.org
OrgTechRef:    https://rdap.arin.net/registry/entity/MOHAM115-ARIN

OrgDNSHandle: YUSON6-ARIN
OrgDNSName:   Yuson, Anthony 
OrgDNSPhone:  +1-650-599-1065 
OrgDNSEmail:  ayuson@smcgov.org
OrgDNSRef:    https://rdap.arin.net/registry/entity/YUSON6-ARIN

OrgAbuseHandle: YUSON6-ARIN
OrgAbuseName:   Yuson, Anthony 
OrgAbusePhone:  +1-650-599-1065 
OrgAbuseEmail:  ayuson@smcgov.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/YUSON6-ARIN

OrgRoutingHandle: MOHAM115-ARIN
OrgRoutingName:   Mohammed, Omer 
OrgRoutingPhone:  +1-510-385-5373 
OrgRoutingEmail:  omohammed@smcgov.org
OrgRoutingRef:    https://rdap.arin.net/registry/entity/MOHAM115-ARIN

OrgDNSHandle: MOHAM115-ARIN
OrgDNSName:   Mohammed, Omer 
OrgDNSPhone:  +1-510-385-5373 
OrgDNSEmail:  omohammed@smcgov.org
OrgDNSRef:    https://rdap.arin.net/registry/entity/MOHAM115-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

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "395323",
    "as_handle" : "AS395323",
    "as_name" : "SMC",
    "admin_contacts" : [ "POSTE14-ARIN", "YUSON6-ARIN", "MOHAM115-ARIN" ],
    "tech_contacts" : [ "YUSON6-ARIN", "POSTE14-ARIN", "POSTE14-ARIN", "CSMNS-ARIN", "YUSON6-ARIN", "MOHAM115-ARIN", "MOHAM115-ARIN" ],
    "abuse_contacts" : [ "CSMNS-ARIN", "POSTE14-ARIN", "MOHAM115-ARIN", "YUSON6-ARIN" ],
    "date_created" : "2016-06-28",
    "date_updated" : "2016-06-28",
    "source" : "https://rdap.arin.net/registry/autnum/395323"
  } ],
  "organization" : {
    "handle" : "CSM-13",
    "name" : "County of San Mateo",
    "address" : [ "455 County Government Center", "Redwood City", "CA", "94063", "US" ],
    "city" : "Redwood City",
    "state" : "CA",
    "zip_code" : "94063",
    "country" : [ "US" ],
    "date_created" : "1994-03-10",
    "date_updated" : "2026-01-21",
    "source" : "https://rdap.arin.net/registry/entity/CSM-13",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "POSTE14-ARIN",
    "name" : "Postelnicu, Ana",
    "email" : [ "apostelnicu@smcgov.org" ],
    "phone" : [ "+1-650-766-3815" ],
    "source" : "https://rdap.arin.net/registry/entity/POSTE14-ARIN"
  }, {
    "handle" : "YUSON6-ARIN",
    "name" : "Yuson, Anthony",
    "email" : [ "ayuson@smcgov.org" ],
    "phone" : [ "+1-650-599-1065" ],
    "source" : "https://rdap.arin.net/registry/entity/YUSON6-ARIN"
  }, {
    "handle" : "MOHAM115-ARIN",
    "name" : "Mohammed, Omer",
    "email" : [ "omohammed@smcgov.org" ],
    "phone" : [ "+1-510-385-5373" ],
    "source" : "https://rdap.arin.net/registry/entity/MOHAM115-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "YUSON6-ARIN",
    "name" : "Yuson, Anthony",
    "email" : [ "ayuson@smcgov.org" ],
    "phone" : [ "+1-650-599-1065" ],
    "source" : "https://rdap.arin.net/registry/entity/YUSON6-ARIN"
  }, {
    "handle" : "POSTE14-ARIN",
    "name" : "Postelnicu, Ana",
    "email" : [ "apostelnicu@smcgov.org" ],
    "phone" : [ "+1-650-766-3815" ],
    "source" : "https://rdap.arin.net/registry/entity/POSTE14-ARIN"
  }, {
    "handle" : "CSMNS-ARIN",
    "name" : "County of San Mate Network Service",
    "email" : [ "ISD_Network@smcgov.org" ],
    "phone" : [ "+1-650-995-3821" ],
    "source" : "https://rdap.arin.net/registry/entity/CSMNS-ARIN"
  }, {
    "handle" : "MOHAM115-ARIN",
    "name" : "Mohammed, Omer",
    "email" : [ "omohammed@smcgov.org" ],
    "phone" : [ "+1-510-385-5373" ],
    "source" : "https://rdap.arin.net/registry/entity/MOHAM115-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "CSMNS-ARIN",
    "name" : "County of San Mate Network Service",
    "email" : [ "ISD_Network@smcgov.org" ],
    "phone" : [ "+1-650-995-3821" ],
    "source" : "https://rdap.arin.net/registry/entity/CSMNS-ARIN"
  }, {
    "handle" : "POSTE14-ARIN",
    "name" : "Postelnicu, Ana",
    "email" : [ "apostelnicu@smcgov.org" ],
    "phone" : [ "+1-650-766-3815" ],
    "source" : "https://rdap.arin.net/registry/entity/POSTE14-ARIN"
  }, {
    "handle" : "MOHAM115-ARIN",
    "name" : "Mohammed, Omer",
    "email" : [ "omohammed@smcgov.org" ],
    "phone" : [ "+1-510-385-5373" ],
    "source" : "https://rdap.arin.net/registry/entity/MOHAM115-ARIN"
  }, {
    "handle" : "YUSON6-ARIN",
    "name" : "Yuson, Anthony",
    "email" : [ "ayuson@smcgov.org" ],
    "phone" : [ "+1-650-599-1065" ],
    "source" : "https://rdap.arin.net/registry/entity/YUSON6-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS33667	Comcast Cable Communications, LLC	US
AS33651	Comcast Cable Communications, LLC	US
AS11404	Wave Broadband	US

Upstreams

AS Number	Description	Country
AS33667	Comcast Cable Communications, LLC	US
AS33651	Comcast Cable Communications, LLC	US
AS11404	Wave Broadband	US