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Organization

Internet Systems Consortium, Inc.

IPv4 addresses
37,376
CIDR ranges
57
Category
isp
BGP prefixes announced
160

Reputation · trust score

A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.

70/100
Moderate
How this score is built
  • Baseline (neutral) 65
  • Isp allocation +5
  • Trust score 70 / 100

Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →

About Internet Systems Consortium

Internet Systems Consortium, Inc., also known as ISC, is an American non-profit corporation that supports the infrastructure of the universal, self-organizing Internet by developing and maintaining core production-quality software, protocols, and operations. ISC has developed several key Internet technologies that enable the global Internet, including: BIND, ISC DHCP and Kea.

Founded
1994
Headquarters
Redwood City

Operates 7 networks present at 9 internet exchanges with a open peering policy.

Countries served by Internet Systems Consortium, Inc.

Every country where this organization has IPv4 allocations, ranked by IPs held.

ASNs owned by Internet Systems Consortium, Inc.

ASNNameIPsPrefixesCountry
AS1280 Internet Systems Consortium, Inc. 23.3K 20 US
AS30133 Internet Systems Consortium, Inc. 10.0K 24 US
AS27321 Internet Systems Consortium, Inc. 2.0K 6 US
AS30132 Internet Systems Consortium, Inc. 1.0K 4 US
AS3557 Internet Systems Consortium, Inc. 512 1 US
AS33071 Internet Systems Consortium, Inc. 256 1 US
AS23713 Internet Systems Consortium, Inc. 256 1 KR

Largest CIDR ranges

CIDRIPsPTR DensityASNCountryStateCity
149.20.16.0/20 4.1K
0.0%
AS1280 US — —
149.20.32.0/20 4.1K
0.0%
AS1280 US — —
149.20.48.0/21 2.0K
0.0%
AS1280 US — —
149.20.72.0/21 2.0K
0.0%
AS1280 US Michigan Traverse City
149.20.80.0/21 2.0K
0.0%
AS1280 US — —
204.152.184.0/21 2.0K
0.0%
AS1280 US — —
149.20.12.0/22 1.0K
0.0%
AS1280 US — —
149.20.60.0/22 1.0K
0.0%
AS1280 US — —
149.20.92.0/22 1.0K
0.0%
AS1280 US — —
192.228.80.0/22 1.0K
0.0%
AS30133 US — —
199.6.8.0/22 1.0K
0.0%
AS30133 US — —
200.93.240.0/22 1.0K
0.0%
AS30133 UY — —
149.20.2.0/23 512
26.6%
AS27321 US — —
149.20.6.0/23 512
9.0%
AS1280 US — —
149.20.58.0/23 512
0.0%
AS1280 US — —
149.20.64.0/23 512
0.4%
AS1280 US — —
149.20.90.0/23 512
0.0%
AS1280 US — —
192.5.4.0/23 512
0.4%
AS3557 US — —
192.158.248.0/23 512
8.4%
AS27321 US — —
192.158.250.0/23 512
0.0%
AS30133 US — —
192.228.84.0/23 512
0.0%
AS30133 US — —
199.6.12.0/23 512
0.0%
AS30133 US Georgia Atlanta
200.93.244.0/23 512
0.0%
AS30133 UY — —
202.41.142.0/23 512
0.0%
AS30133 NZ — —
203.119.16.0/23 512
0.0%
AS30133 JP — —
103.11.221.0/24 256
0.0%
AS30133 JP — —
149.20.0.0/24 256
3.9%
AS27321 US — —
149.20.1.0/24 256
0.0%
AS1280 US — —
149.20.4.0/24 256
50.0%
AS27321 US — —
149.20.5.0/24 256
50.0%
AS30132 US — —
149.20.8.0/24 256
7.4%
AS1280 US — —
149.20.9.0/24 256
2.7%
AS30132 US — —
149.20.10.0/24 256
0.0%
AS1280 US — —
149.20.56.0/24 256
0.0%
AS1280 US — —
149.20.57.0/24 256
4.7%
AS27321 US — —
149.20.66.0/24 256
0.0%
AS27321 US — —
149.20.67.0/24 256
0.0%
AS30132 US — —
149.20.88.0/24 256
0.0%
AS1280 US — —
192.111.107.0/24 256
3.9%
AS1280 US — —
192.158.252.0/24 256
17.6%
AS1280 US — —
192.228.87.0/24 256
0.0%
AS30133 US — —
192.228.92.0/24 256
0.0%
AS30133 US — —
199.6.0.0/24 256
14.5%
AS33071 US — —
199.6.1.0/24 256
30.1%
AS30132 US — —
199.6.14.0/24 256
0.0%
AS30133 US — —
199.253.63.0/24 256
0.0%
AS30133 US — —
199.253.181.0/24 256
0.0%
AS30133 US — —
200.93.246.0/24 256
0.0%
AS30133 UY — —
202.41.140.0/24 256
0.0%
AS30133 NZ — —
202.41.142.0/24 256
0.0%
AS30133 CN — —
202.41.143.0/24 256
0.0%
AS30133 HK — —
202.41.144.0/24 256
0.0%
AS30133 AU — —
202.41.145.0/24 256
0.0%
AS23713 AU — —
202.41.146.0/24 256
0.0%
AS30133 TW — —
203.119.16.0/24 256
0.0%
AS30133 JP — —
203.119.17.0/24 256
0.0%
AS30133 ID — —
203.119.19.0/24 256
0.0%
AS30133 JP — —
203.119.20.0/24 256
0.0%
AS30133 PK — —
203.119.51.0/24 256
0.0%
AS30133 FJ — —
203.119.57.0/24 256
0.0%
AS30133 MY — —
203.119.79.0/24 256
0.0%
AS30133 KH — —

Frequently Asked Questions

How many IP addresses does Internet Systems Consortium, Inc. own?

Internet Systems Consortium, Inc. controls 37.4K IPv4 addresses distributed across 57 CIDR ranges. The organization is registered in United States.

What ASNs does Internet Systems Consortium, Inc. operate?

Internet Systems Consortium, Inc. operates 7 Autonomous Systems. Each ASN represents an independently routed network that Internet Systems Consortium, Inc. manages for internet traffic delivery.

What countries does Internet Systems Consortium, Inc. serve?

Internet Systems Consortium, Inc. has IP address allocations in 10 countries, indicating a multinational network presence for delivering services across these regions.

What type of organization is Internet Systems Consortium, Inc.?

Internet Systems Consortium, Inc. is categorized as isp. This classification is based on the organization's primary use of its IP address allocations.

Last updated: 2026-11-12 12:54:05 UTC
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