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CIDR Range

38.123.144.0/20

4.1K IPs /20 United States ARIN
Addresses
4,096
4.1K
IP Range
38.123.144.0
→ 38.123.159.255
Sub-ranges
34+
within this block
PTR Density
19.8%
813 of 4.1K IPs have PTR

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.

76/100
Moderate
How this score is built

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

Ranges inside 38.123.144.0/20

CIDRIPsOrganizationASNCountry
38.123.144.0/22 1.0K Yuma Regional Medical Center AS395102 US
38.123.144.0/22 1.0K Yuma Regional Medical Center AS395102 US
38.123.144.0/22 1.0K — — US
38.123.152.0/23 512 — — US
38.123.152.0/23 512 Cogent Communications, LLC AS174 US
38.123.152.0/23 512 Cogent Communications, LLC AS174 US
38.123.150.0/23 512 Cogent Communications, LLC AS174 US
38.123.150.0/23 512 Cogent Communications, LLC AS174 US
38.123.157.0/24 256 — — US
38.123.156.0/24 256 ICON Technologies Inc. AS31789 US
38.123.156.0/24 256 ICON Technologies Inc. AS31789 US
38.123.156.0/24 256 — — US
38.123.159.0/24 256 ICON Technologies Inc. AS31789 US
38.123.159.0/24 256 ICON Technologies Inc. AS31789 US
38.123.158.0/24 256 — — US
38.123.157.0/24 256 Cogent Communications, LLC AS174 US
38.123.158.0/24 256 Andrena, Inc. AS30038 US
38.123.158.0/24 256 Andrena, Inc. AS30038 US
38.123.157.0/24 256 Cogent Communications, LLC AS174 US
38.123.155.0/24 256 — — US
38.123.155.0/24 256 Cogent Communications, LLC AS174 US
38.123.155.0/24 256 Cogent Communications, LLC AS174 US
38.123.148.0/24 256 Cloud at Work AS27549 US
38.123.148.0/24 256 Cloud at Work AS27549 US
38.123.148.0/24 256 — — US
38.123.149.0/24 256 TekTonic AS396839 US
38.123.149.0/24 256 TekTonic AS396839 US
38.123.149.0/24 256 — — US
38.123.150.0/24 256 — — US
38.123.151.0/24 256 — — US
38.123.154.0/24 256 ICON Technologies Inc. AS31789 US
38.123.154.0/24 256 ICON Technologies Inc. AS31789 US

First and last addresses in 38.123.144.0/20

38.123.144.0/20 runs from 38.123.144.0 to 38.123.159.255.

First 16
38.123.144.0 38.123.144.1 38.123.144.2 38.123.144.3 38.123.144.4 38.123.144.5 38.123.144.6 38.123.144.7 38.123.144.8 38.123.144.9 38.123.144.10 38.123.144.11 38.123.144.12 38.123.144.13 38.123.144.14 38.123.144.15
Last 16
38.123.159.240 38.123.159.241 38.123.159.242 38.123.159.243 38.123.159.244 38.123.159.245 38.123.159.246 38.123.159.247 38.123.159.248 38.123.159.249 38.123.159.250 38.123.159.251 38.123.159.252 38.123.159.253 38.123.159.254 38.123.159.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 38.0.0.0/8.

Announced prefix
38.0.0.0/8
Origin AS
AS174
Announcement samples
17,740
Last seen
2026-11-14 02:59:33

RIR Ownership History

Atom feed ⇲

Allocation changes captured from regional internet registry (RIR) delegation files, re-imported every six hours.

Date Event From To
2026-05-10 New Allocation — US

Frequently Asked Questions

What is 38.123.144.0/20?

38.123.144.0/20 is a CIDR network block containing 4,096 IPv4 addresses (from 38.123.144.0 to 38.123.159.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 38.123.144.0/20 network?

The 38.123.144.0/20 range is allocated to an unknown organization from United States.

Last updated: 2026-11-14 04:54:05 UTC
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