ASN AS33071 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS33071?

AS33071 is listed under Internet Systems Consortium, 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?

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AS33071 Internet Systems Consortium, Inc.

ASN Lookup Tool

Internet Systems Consortium, Inc. isc.org

US 2 Routes

AS Data

AS33071

AS33071 – Internet Systems Consortium, Inc.

AS Number	33071
AS Name	ISC-F-AS
Organization	Internet Systems Consortium, Inc. (isc-94)
Country	US
Website	isc.org
Number of IPv4 Routes	1
Number of IPv6 Routes	1
ASN type	ISP
Registry	ARIN
Date Allocated	2004-09-28

ASN Intelligence API for production workflows

Use ASN data for AS33071 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
199.6.0.0/24	AS33071	Internet Systems Consortium, Inc.	Internet Systems Consortium, Inc.	256
2001:500:71::/48	AS33071	Internet Systems Consortium, Inc.	Internet Systems Consortium, Inc.	~1×10²⁴

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:       33071
ASName:         ISC-F-AS
ASHandle:       AS33071
RegDate:        2004-09-28
Updated:        2012-02-24
Comment:        For details of F root nameserver operations, see http://f.root-servers.org/.
Ref:            https://rdap.arin.net/registry/autnum/33071


OrgName:        Internet Systems Consortium, Inc.
OrgId:          ISC-94
Address:        PO Box 360
City:           Newmarket
StateProv:      NH
PostalCode:     03857
Country:        US
RegDate:        2004-01-09
Updated:        2024-01-03
Ref:            https://rdap.arin.net/registry/entity/ISC-94


OrgTechHandle: BELLI82-ARIN
OrgTechName:   Bellis, Ray 
OrgTechPhone:  +1-650-423-1300 
OrgTechEmail:  ray@isc.org
OrgTechRef:    https://rdap.arin.net/registry/entity/BELLI82-ARIN

OrgAbuseHandle: ISCAT-ARIN
OrgAbuseName:   Internet Systems Consortium Abuse Team
OrgAbusePhone:  +1-650-423-1300 
OrgAbuseEmail:  abuse@isc.org
OrgAbuseRef:    https://rdap.arin.net/registry/entity/ISCAT-ARIN

OrgTechHandle: JSO127-ARIN
OrgTechName:   Osborn, Jeffrey Scott
OrgTechPhone:  +1-408-455-8258 
OrgTechEmail:  jeff@isc.org
OrgTechRef:    https://rdap.arin.net/registry/entity/JSO127-ARIN

OrgTechHandle: ISCN-ARIN
OrgTechName:   Internet Systems Consortium NOC
OrgTechPhone:  +1-650-423-1310 
OrgTechEmail:  noc@isc.org
OrgTechRef:    https://rdap.arin.net/registry/entity/ISCN-ARIN

OrgNOCHandle: ISCN-ARIN
OrgNOCName:   Internet Systems Consortium NOC
OrgNOCPhone:  +1-650-423-1310 
OrgNOCEmail:  noc@isc.org
OrgNOCRef:    https://rdap.arin.net/registry/entity/ISCN-ARIN

OrgTechHandle: RA15-ARIN
OrgTechName:   Adams, Rick 
OrgTechPhone:  +1-703-255-5527 
OrgTechEmail:  rick@cello.net
OrgTechRef:    https://rdap.arin.net/registry/entity/RA15-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" : "33071",
    "as_handle" : "AS33071",
    "as_name" : "ISC-F-AS",
    "tech_contacts" : [ "BELLI82-ARIN", "JSO127-ARIN", "ISCN-ARIN", "RA15-ARIN" ],
    "abuse_contacts" : [ "ISCAT-ARIN" ],
    "date_created" : "2004-09-28",
    "date_updated" : "2012-02-24",
    "source" : "https://rdap.arin.net/registry/autnum/33071"
  } ],
  "organization" : {
    "handle" : "ISC-94",
    "name" : "Internet Systems Consortium, Inc.",
    "address" : [ "PO Box 360", "Newmarket", "NH", "03857", "US" ],
    "city" : "Newmarket",
    "state" : "NH",
    "zip_code" : "03857",
    "country" : [ "US" ],
    "date_created" : "2004-01-09",
    "date_updated" : "2024-01-03",
    "source" : "https://rdap.arin.net/registry/entity/ISC-94",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "handle" : "BELLI82-ARIN",
    "name" : "Bellis, Ray",
    "email" : [ "ray@isc.org" ],
    "phone" : [ "+1-650-423-1300" ],
    "source" : "https://rdap.arin.net/registry/entity/BELLI82-ARIN"
  }, {
    "handle" : "JSO127-ARIN",
    "name" : "Osborn, Jeffrey Scott",
    "email" : [ "jeff@isc.org" ],
    "phone" : [ "+1-408-455-8258" ],
    "source" : "https://rdap.arin.net/registry/entity/JSO127-ARIN"
  }, {
    "handle" : "ISCN-ARIN",
    "name" : "Internet Systems Consortium NOC",
    "email" : [ "noc@isc.org" ],
    "phone" : [ "+1-650-423-1310" ],
    "source" : "https://rdap.arin.net/registry/entity/ISCN-ARIN"
  }, {
    "handle" : "RA15-ARIN",
    "name" : "Adams, Rick",
    "email" : [ "rick@cello.net" ],
    "phone" : [ "+1-703-255-5527" ],
    "source" : "https://rdap.arin.net/registry/entity/RA15-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "ISCAT-ARIN",
    "name" : "Internet Systems Consortium Abuse Team",
    "email" : [ "abuse@isc.org" ],
    "phone" : [ "+1-650-423-1300" ],
    "source" : "https://rdap.arin.net/registry/entity/ISCAT-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS24482	SG.GS	SG
AS6453	TATA COMMUNICATIONS AMERICA INC	US
AS6939	Hurricane Electric LLC	US
AS20473	The Constant Company, LLC	US
AS4826	Vocus Connect International Backbone	AU
AS4775	Globe Telecoms	PH
AS199524	G-Core Labs S.A.	LU
AS14907	Wikimedia Foundation Inc.	US
AS36236	NetActuate, Inc	US
AS53597	Hoyos Consulting LLC	US
AS3557	Internet Systems Consortium, Inc.	US
AS16276	OVH SAS	FR
AS19754	The Fusion Network, LLC	US
AS23367	Adaptive Data Networks, LLC	US
AS6453	TATA COMMUNICATIONS (AMERICA) INC	US
AS7922	Comcast Cable Communications, LLC	US
AS16552	Tiggee LLC	US
AS8220	COLT Technology Services Group Limited	GB
AS32709	Joink, LLC	US
AS32590	Valve Corporation	US
AS19653	CTS Communications Corp	US
AS11164	Internet2	US
AS24406	China Internet Network Infomation Center	CN
AS19151	BroadbandONE, LLC	US
AS2381	WiscNet	US
AS35280	F5 Networks SARL	FR
AS1828	Unitas Global	US
AS1299	Arelion Sweden AB	SE
AS53828	NETWORK INNOVATIONS, LLC	US
AS137409	GSL Networks Pty LTD	AU
AS4181	TDS TELECOM	US
AS49544	i3D.net B.V	NL

Upstreams

AS Number	Description	Country
AS6453	TATA COMMUNICATIONS AMERICA INC	US
AS1299	Arelion Sweden AB	SE
AS6939	Hurricane Electric LLC	US
AS137409	GSL Networks Pty LTD	AU

Downstreams

AS Number	Description	Country
AS3557	Internet Systems Consortium, Inc.	US
AS24406	China Internet Network Infomation Center	CN

Contacts

Email Contacts

noc@isc.org jeff@isc.org ray@isc.org rick@cello.net

Abuse Contacts

abuse@isc.org