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CIDR Range

12.228.0.0/15

131.1K IPs /15 United States ARIN
Addresses
131,072
131.1K
Sub-ranges
50+
within this block
PTR Density
0.6%
743 of 131.1K 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 12.228.0.0/15

CIDRIPsOrganizationASNCountry
12.228.64.0/18 16.4K AT&T Enterprises, LLC AS7018 US
12.228.192.0/18 16.4K AT&T Enterprises, LLC AS7018 US
12.228.192.0/18 16.4K AT&T Enterprises, LLC AS7018 US
12.228.64.0/18 16.4K AT&T Enterprises, LLC AS7018 US
12.229.192.0/18 16.4K AT&T Enterprises, LLC AS7018 US
12.229.96.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.228.32.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.229.32.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.229.32.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.229.224.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.229.96.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.228.32.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.229.160.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.229.160.0/19 8.2K AT&T Enterprises, LLC AS7018 US
12.228.128.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.229.0.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.228.160.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.228.160.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.229.192.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.228.16.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.228.176.0/20 4.1K — — US
12.229.80.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.229.80.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.228.16.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.229.128.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.229.128.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.228.128.0/20 4.1K AT&T Enterprises, LLC AS7018 US
12.229.152.0/21 2.0K AT&T Enterprises, LLC AS7018 US
12.229.72.0/21 2.0K AT&T Enterprises, LLC AS7018 US
12.229.24.0/21 2.0K AT&T Enterprises, LLC AS7018 US
12.229.176.0/21 2.0K — — US
12.228.16.0/21 2.0K — — US

First and last addresses in 12.228.0.0/15

12.228.0.0/15 runs from 12.228.0.0 to 12.229.255.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 12.128.0.0/9.

Announced prefix
Origin AS
Announcement samples
12,700
Last seen
2026-11-13 21:48:12

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 12.228.0.0/15?

12.228.0.0/15 is a CIDR network block containing 131,072 IPv4 addresses (from 12.228.0.0 to 12.229.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 12.228.0.0/15 network?

The 12.228.0.0/15 range is allocated to an unknown organization from United States.

Last updated: 2026-11-13 23:09:05 UTC
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