AS1280 Internet Systems Consortium, Inc. details

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AS1280 – Internet Systems Consortium, Inc.

Field	Value
Country	United States
Website	isc.org
Hosted domains	35
Number of IPv4	23,552
Number of IPv6	79,239,042,846,640,869,256,116,305,920
ASN type	ISP
Registry	arin
Allocated	34 years ago on Jul 31, 1991
Updated	13 years ago on Apr 02, 2012

Netblock	Company	Num of IPs
204.152.184.0/21	Internet Systems Consortium, Inc.	2,048
149.20.0.0/24	Internet Systems Consortium, Inc.	256
149.20.10.0/24	Internet Systems Consortium, Inc.	256
149.20.1.0/24	Internet Systems Consortium, Inc.	256
149.20.12.0/24	Internet Systems Consortium, Inc.	256
149.20.13.0/24	Internet Systems Consortium, Inc.	256
149.20.14.0/24	Internet Systems Consortium, Inc.	256
149.20.15.0/24	Internet Systems Consortium, Inc.	256
149.20.16.0/24	Internet Systems Consortium, Inc.	256
149.20.17.0/24	Internet Systems Consortium, Inc.	256
149.20.18.0/24	Internet Systems Consortium, Inc.	256
149.20.19.0/24	Internet Systems Consortium, Inc.	256
149.20.20.0/24	Internet Systems Consortium, Inc.	256
149.20.21.0/24	Internet Systems Consortium, Inc.	256
149.20.22.0/24	Internet Systems Consortium, Inc.	256
149.20.23.0/24	Internet Systems Consortium, Inc.	256
149.20.24.0/24	Internet Systems Consortium, Inc.	256
149.20.25.0/24	Internet Systems Consortium, Inc.	256
149.20.26.0/24	Internet Systems Consortium, Inc.	256
149.20.27.0/24	Internet Systems Consortium, Inc.	256
149.20.28.0/24	Internet Systems Consortium, Inc.	256
149.20.29.0/24	Internet Systems Consortium, Inc.	256
149.20.30.0/24	Internet Systems Consortium, Inc.	256
149.20.31.0/24	Internet Systems Consortium, Inc.	256
149.20.32.0/24	Internet Systems Consortium, Inc.	256
149.20.33.0/24	Internet Systems Consortium, Inc.	256
149.20.34.0/24	Internet Systems Consortium, Inc.	256
149.20.35.0/24	Internet Systems Consortium, Inc.	256
149.20.36.0/24	Internet Systems Consortium, Inc.	256
149.20.37.0/24	Internet Systems Consortium, Inc.	256
149.20.38.0/24	Internet Systems Consortium, Inc.	256
149.20.39.0/24	Internet Systems Consortium, Inc.	256
149.20.40.0/24	Internet Systems Consortium, Inc.	256
149.20.41.0/24	Internet Systems Consortium, Inc.	256
149.20.42.0/24	Internet Systems Consortium, Inc.	256
149.20.43.0/24	Internet Systems Consortium, Inc.	256
149.20.44.0/24	Internet Systems Consortium, Inc.	256
149.20.45.0/24	Internet Systems Consortium, Inc.	256
149.20.46.0/24	Internet Systems Consortium, Inc.	256
149.20.47.0/24	Internet Systems Consortium, Inc.	256
149.20.48.0/24	Internet Systems Consortium, Inc.	256
149.20.49.0/24	Internet Systems Consortium, Inc.	256
149.20.50.0/24	Internet Systems Consortium, Inc.	256
149.20.51.0/24	Internet Systems Consortium, Inc.	256
149.20.52.0/24	Internet Systems Consortium, Inc.	256
149.20.53.0/24	Internet Systems Consortium, Inc.	256
149.20.54.0/24	Internet Systems Consortium, Inc.	256
149.20.55.0/24	Internet Systems Consortium, Inc.	256
149.20.56.0/24	Internet Systems Consortium, Inc.	256
149.20.58.0/24	Internet Systems Consortium, Inc.	256
149.20.59.0/24	Internet Systems Consortium, Inc.	256
149.20.60.0/24	Internet Systems Consortium, Inc.	256
149.20.6.0/24	Internet Systems Consortium, Inc.	256
149.20.61.0/24	Internet Systems Consortium, Inc.	256
149.20.62.0/24	Internet Systems Consortium, Inc.	256
149.20.63.0/24	Internet Systems Consortium, Inc.	256
149.20.64.0/24	Internet Systems Consortium, Inc.	256
149.20.65.0/24	Internet Systems Consortium, Inc.	256
149.20.7.0/24	Internet Systems Consortium, Inc.	256
149.20.72.0/24	Internet Systems Consortium, Inc.	256
149.20.73.0/24	Internet Systems Consortium, Inc.	256
149.20.74.0/24	Internet Systems Consortium, Inc.	256
149.20.75.0/24	Internet Systems Consortium, Inc.	256
149.20.76.0/24	Internet Systems Consortium, Inc.	256
149.20.77.0/24	Internet Systems Consortium, Inc.	256
149.20.78.0/24	Internet Systems Consortium, Inc.	256
149.20.79.0/24	Internet Systems Consortium, Inc.	256
149.20.80.0/24	Internet Systems Consortium, Inc.	256
149.20.8.0/24	Internet Systems Consortium, Inc.	256
149.20.81.0/24	Internet Systems Consortium, Inc.	256
149.20.82.0/24	Internet Systems Consortium, Inc.	256
149.20.83.0/24	Internet Systems Consortium, Inc.	256
149.20.84.0/24	Internet Systems Consortium, Inc.	256
149.20.85.0/24	Internet Systems Consortium, Inc.	256
149.20.86.0/24	Internet Systems Consortium, Inc.	256
149.20.87.0/24	Internet Systems Consortium, Inc.	256
149.20.88.0/24	Internet Systems Consortium, Inc.	256
149.20.90.0/24	Internet Systems Consortium, Inc.	256
149.20.91.0/24	Internet Systems Consortium, Inc.	256
149.20.92.0/24	Internet Systems Consortium, Inc.	256
149.20.93.0/24	Internet Systems Consortium, Inc.	256
149.20.94.0/24	Internet Systems Consortium, Inc.	256
149.20.95.0/24	Internet Systems Consortium, Inc.	256
192.111.107.0/24	Shockwave Engineering	256
192.158.252.0/24	Internet Systems Consortium, Inc.	256
204.152.184.0/24	Internet Systems Consortium, Inc.	256
204.152.185.0/24	Internet Systems Consortium, Inc.	256
204.152.186.0/24	Internet Systems Consortium, Inc.	256
204.152.187.0/24	Internet Systems Consortium, Inc.	256
204.152.188.0/24	Internet Systems Consortium, Inc.	256
204.152.189.0/24	Internet Systems Consortium, Inc.	256
204.152.190.0/24	Internet Systems Consortium, Inc.	256
204.152.191.0/24	Internet Systems Consortium, Inc.	256

Netblock	Company
2001:4f8::/32	Internet Systems Consortium, Inc.
2001:4f8:4::/46	Internet Systems Consortium, Inc.
2001:4f8:4::/48	Internet Systems Consortium, Inc.
2001:4f8::/48	Internet Systems Consortium, Inc.
2001:4f8:8::/48	Internet Systems Consortium, Inc.
2001:4f8:fffe::/48	Internet Systems Consortium, Inc.
2001:4f8:ffff::/48	Internet Systems Consortium, Inc.

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WHOIS Details

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                                                ASHandle:       AS1280
                                                OrgID:          AS1280
                                                ASName:         AS1280
                                                ASNumber:       AS1280
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA

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Hosted Domains

There are 35 domain names hosted across 19 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
192.158.252.52	██████████	5
204.152.189.157	██████████	4
192.158.252.200	██████████	4
149.20.54.251	██████████	4
204.152.189.152	██████████	3
149.20.20.20	██████████	2
204.152.191.37	█████████	2
192.158.252.20	█████████	1
192.158.252.15	██████████	1
204.152.189.164	██████████	1

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Peers

There are 47 peers for this ASN.

Peers	Name
AS10310	Oath Holdings Inc.
AS11164	Internet2
AS1299	Arelion Sweden AB
AS132203	Tencent Building, Kejizhongyi Avenue
AS13285	TalkTalk Communications Limited
AS13335	Cloudflare, Inc.
AS14061	DigitalOcean, LLC
AS15169	Google LLC
AS16276	OVH SAS
AS16509	Amazon.com, Inc.
AS19151	BroadbandONE, LLC
AS199524	G-Core Labs S.A.
AS20940	Akamai International B.V.
AS2152	CENIC
AS22697	Roblox
AS2914	NTT America, Inc.
AS30133	Internet Systems Consortium, Inc.
AS32787	Akamai Technologies, Inc.
AS3292	TDC Holding A/S
AS3557	Internet Systems Consortium, Inc.
AS36692	Cisco OpenDNS, LLC
AS38158	PT. Cyberindo Aditama
AS3856	Packet Clearing House, Inc.
AS40627	RingCentral Inc
AS41095	IPTP LTD
AS42	WoodyNet, Inc.
AS45102	Alibaba (US) Technology Co., Ltd.
AS4637	Telstra Global
AS4648	Global-Gateway Internet
AS46489	Twitch Interactive Inc.
AS4780	Digital United Inc.
AS49544	i3D.net B.V
AS55818	MC-IX Matrix Internet Exchange RS-1
AS57976	Blizzard Entertainment, Inc
AS62955	eBay, Inc
AS6762	TELECOM ITALIA SPARKLE S.p.A.
AS6939	Hurricane Electric LLC
AS7091	Next Level Infrastructure, LLC
AS714	Apple Inc.
AS7342	VeriSign Infrastructure & Operations
AS7575	Australian Academic and Research Network (AARNet)
AS7713	PT Telekomunikasi Indonesia
AS7922	Comcast Cable Communications, LLC
AS8674	Netnod AB
AS9505	Taiwan Internet Gateway
AS9680	HiNet Service Center in U.S.A
AS9924	Taiwan Fixed Network, Telco and Network Service Provider.

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Upstreams

There are 4 upstreams for this ASN.

upstreams	Name
AS1299	Arelion Sweden AB
AS2914	NTT America, Inc.
AS6762	TELECOM ITALIA SPARKLE S.p.A.
AS6939	Hurricane Electric LLC

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Downstreams

There are 6 downstreams for this ASN.

Downstreams	Name
AS1299	Arelion Sweden AB
AS2914	NTT America, Inc.
AS30133	Internet Systems Consortium, Inc.
AS3557	Internet Systems Consortium, Inc.
AS6762	TELECOM ITALIA SPARKLE S.p.A.
AS6939	Hurricane Electric LLC

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Pingable IPs

6 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
2001:4f8:4:fffe::26	AS1280 Internet Systems Consortium, Inc.	`0.79ms` from San Jose, US
149.20.7.53	AS1280 Internet Systems Consortium, Inc.	`0.86ms` from Fremont, US
149.20.8.30	AS1280 Internet Systems Consortium, Inc.	`0.88ms` from Fremont, US
192.158.252.182	AS1280 Internet Systems Consortium, Inc.	`0.84ms` from Fremont, US
2001:4f8:ffff:3::181	AS1280 Internet Systems Consortium, Inc.	`0.80ms` from San Jose, US
2001:4f8:8::5	AS1280 Internet Systems Consortium, Inc.	`0.82ms` from San Jose, US

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
92.133.82.128	AS3215 Orange S.A.	`9.59ms` from Aubervilliers, FR
155.52.97.96	AS40831 Mass General Brigham Incorporated	`1.98ms` from Boston, US
170.244.249.32	AS264943 VIARAPIDA TELECOMUNICAÇÕES LTDA - ME	`12.00ms` from Curitiba, BR
52.49.135.224	AS16509 Amazon.com, Inc.	`0.23ms` from Dublin, IE
84.171.33.32	AS3320 Deutsche Telekom AG	`7.59ms` from Frankfurt am Main, DE
39.34.240.192	AS17557 Pakistan Telecommunication Company Limited	`12.98ms` from Lahore, PK
47.45.89.224	AS20115 Charter Communications LLC	`12.44ms` from Los Angeles, US
99.104.160.192	AS7018 AT&T Enterprises, LLC	`7.96ms` from Los Angeles, US
126.25.170.144	AS17676 SoftBank Corp.	`13.04ms` from Osaka, JP
86.217.153.224	AS3215 Orange S.A.	`9.72ms` from Paris, FR
52.242.63.208	AS8075 Microsoft Corporation	`0.26ms` from Quebec, CA
36.39.100.0	AS17839 LG HelloVision Corp.	`1.61ms` from Seoul, KR
211.245.87.112	AS9318 SK Broadband Co Ltd	`4.83ms` from Seoul, KR
77.171.191.96	AS1136 KPN B.V.	`1.51ms` from Amsterdam, NL
77.11.96.176	AS6805 Telefonica Germany GmbH & Co.OHG	`4.12ms` from Berlin, DE
132.196.248.224	AS8075 Microsoft Corporation	`0.34ms` from Boydton, US
156.192.244.208	AS8452 TE-AS	`7.46ms` from Cairo, EG
177.74.251.128	AS28343 UNIFIQUE TELECOMUNICACOES S/A	`9.29ms` from Chapeco, BR
73.59.226.32	AS7922 Comcast Cable Communications, LLC	`15.12ms` from Dallas, US
91.40.90.144	AS3320 Deutsche Telekom AG	`4.21ms` from Frankfurt am Main, DE
217.246.131.16	AS3320 Deutsche Telekom AG	`3.07ms` from Frankfurt am Main, DE
91.181.10.48	AS5432 Proximus NV	`4.72ms` from Gravelines, FR
109.132.249.240	AS5432 Proximus NV	`4.67ms` from Gravelines, FR
2.164.34.240	AS3320 Deutsche Telekom AG	`19.99ms` from Hamburg, DE
70.115.154.96	AS11427 Charter Communications Inc	`10.29ms` from Houston, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

traceroute -a -n -q1 -m7 149.20.73.189

traceroute to 149.20.73.189 (149.20.73.189): 7 hops max, 52 byte packets

1 [AS197648] 185.106.102.29 10.239 ms

2 [AS8544] 46.21.52.73 14.673 ms

3 [AS8544] 46.21.52.74 8.558 ms

4 [AS16229] 217.27.62.32 11.134 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Limassol, CY

On August 28th 2025

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What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS1280 at robtex.

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