ASN AS3557 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS3557?

AS3557 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?

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.

AS3557 Internet Systems Consortium, Inc.

Internet Systems Consortium, Inc. isc.org

US 4 Routes

AS Data

AS3557

AS3557 – Internet Systems Consortium, Inc.

AS Number	3557
AS Name	ISC-AS
Organization	Internet Systems Consortium, Inc. (isc-94-z)
Country	US
Website	isc.org
Number of IPv4 Routes	2
Number of IPv6 Routes	2
ASN type	ISP
Registry	ARIN
Date Allocated	1994-04-21

ASN Intelligence API for production workflows

Use ASN data for AS3557 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
192.5.5.0/24	AS3557	Internet Systems Consortium, Inc.	Internet Systems Consortium, Inc.	256
2001:500:2e::/47	AS3557	Internet Systems Consortium, Inc.	Internet Systems Consortium, Inc.	~2×10²⁴
2001:500:2f::/48	AS3557	Internet Systems Consortium, Inc.	Internet Systems Consortium, Inc.	~1×10²⁴
192.5.4.0/23	AS3557	Internet Systems Consortium, Inc.	Internet Systems Consortium, Inc.	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:       3557
ASName:         ISC-AS
ASHandle:       AS3557
RegDate:        1994-04-21
Updated:        2012-04-02
Ref:            https://rdap.arin.net/registry/autnum/3557


OrgName:        Internet Systems Consortium, Inc.
OrgId:          ISC-94-Z
Address:        PO Box 360
City:           Newmarket
StateProv:      NH
PostalCode:     03857
Country:        US
RegDate:        2007-11-08
Updated:        2024-01-03
Ref:            https://rdap.arin.net/registry/entity/ISC-94-Z


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

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

OrgTechHandle: JSO127-ARIN
OrgTechName:   Osborn, Jeffrey Scott
OrgTechPhone:  +1-650-423-1300 
OrgTechEmail:  jeff@isc.org
OrgTechRef:    https://rdap.arin.net/registry/entity/JSO127-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

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


#
# 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" : "3557",
    "as_handle" : "AS3557",
    "as_name" : "ISC-AS",
    "tech_contacts" : [ "ISCN-ARIN", "BELLI82-ARIN", "JSO127-ARIN", "RA15-ARIN" ],
    "abuse_contacts" : [ "ISCAT-ARIN" ],
    "date_created" : "1994-04-21",
    "date_updated" : "2012-04-02",
    "source" : "https://rdap.arin.net/registry/autnum/3557"
  } ],
  "organization" : {
    "handle" : "ISC-94-Z",
    "name" : "Internet Systems Consortium, Inc.",
    "address" : [ "PO Box 360", "Newmarket", "NH", "03857", "US" ],
    "city" : "Newmarket",
    "state" : "NH",
    "zip_code" : "03857",
    "country" : [ "US" ],
    "date_created" : "2007-11-08",
    "date_updated" : "2024-01-03",
    "source" : "https://rdap.arin.net/registry/entity/ISC-94-Z",
    "addressCountry" : "US"
  },
  "technical_contacts" : [ {
    "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" : "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" : [ "+1-650-423-1300" ],
    "source" : "https://rdap.arin.net/registry/entity/JSO127-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
AS211022	Internet Systems Consortium Inc.	US
AS33073	Internet Systems Consortium, Inc.	US
AS24048	Internet Systems Consortium, Inc.	ID
AS33078	Internet Systems Consortium, Inc.	US
AS27913	Internet Systems Consortium	UY
AS275689	Internet Systems Consortium	BR
AS45220	Internet Systems Consortium	MY
AS2847	Kauno Technologijos Universitetas	LT
AS24051	Internet Systems Consortium, Inc.	PK
AS45220	Internet Systems Consortium, Auckland	MY
AS53518	Internet Systems Consortium, Inc.	US
AS27859	Internet Systems Consortium	UY
AS394070	Internet Systems Consortium, Inc.	US
AS215233	Internet Systems Consortium Inc.	US
AS33080	Internet Systems Consortium, Inc.	US
AS33071	Internet Systems Consortium, Inc.	US
AS23710	Internet Systems Consortium, Inc.	NZ
AS210765	Internet Systems Consortium Inc.	US
AS27320	Internet Systems Consortium, Inc.	US
AS30130	Internet Systems Consortium, Inc.	US
AS210762	Internet Systems Consortium Inc.	US
AS33077	Internet Systems Consortium, Inc.	US
AS27322	Internet Systems Consortium, Inc.	US
AS201969	Internet Systems Consortium Inc.	US
AS23708	Internet Systems Consortium	AU
AS395217	Internet Systems Consortium, Inc.	US
AS23709	Internet Systems Consortium, Inc.	HK
AS33082	Internet Systems Consortium, Inc.	US
AS61447	Internet Systems Consortium	UY
AS211834	Internet Systems Consortium Inc.	US
AS30124	Internet Systems Consortium, Inc.	US
AS30132	Internet Systems Consortium, Inc.	US
AS24051	Internet Systems Consortium	PK
AS328995	ST DIGITAL	CM
AS33081	Internet Systems Consortium, Inc.	US
AS33079	Internet Systems Consortium, Inc.	US
AS275701	LACNIC - Latin American and Caribbean IP address	BR
AS13335	Cloudflare, Inc.	US
AS1280	Internet Systems Consortium, Inc.	US
AS205488	Internet Systems Consortium Inc.	US
AS27321	Internet Systems Consortium, Inc.	US
AS33558	Internet Systems Consortium, Inc.	US
AS27916	Internet Systems Consortium	UY
AS30122	Internet Systems Consortium, Inc.	US
AS33072	Internet Systems Consortium, Inc.	US

Upstreams

AS Number	Description	Country
AS27322	Internet Systems Consortium, Inc.	US
AS33073	Internet Systems Consortium, Inc.	US
AS33082	Internet Systems Consortium, Inc.	US
AS61447	Internet Systems Consortium	UY
AS45220	Internet Systems Consortium	MY
AS30124	Internet Systems Consortium, Inc.	US
AS30132	Internet Systems Consortium, Inc.	US
AS24051	Internet Systems Consortium	PK
AS328995	ST DIGITAL	CM
AS33081	Internet Systems Consortium, Inc.	US
AS13335	Cloudflare, Inc.	US
AS394070	Internet Systems Consortium, Inc.	US
AS215233	Internet Systems Consortium Inc.	US
AS205488	Internet Systems Consortium Inc.	US
AS1280	Internet Systems Consortium, Inc.	US
AS33071	Internet Systems Consortium, Inc.	US
AS33080	Internet Systems Consortium, Inc.	US
AS27320	Internet Systems Consortium, Inc.	US
AS27321	Internet Systems Consortium, Inc.	US
AS210762	Internet Systems Consortium Inc.	US
AS30122	Internet Systems Consortium, Inc.	US