CIDR Range

70.90.72.0/21

2.0K IPs /21 Comcast Cable Communications, LLC AS7922 United States ARIN

Addresses

2,048

2.0K

IP Range

70.90.72.0

→ 70.90.79.255

Sub-ranges

within this block

PTR Density

98.9%

2.0K of 2.0K 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.

81/100

Trusted

How this score is built

Baseline (neutral) 65
Long-established allocation (22y) +6
Has a reverse-DNS (PTR) record +5
Isp allocation +5
Trust score 81 / 100

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

Geolocation

First and last addresses in 70.90.72.0/21

70.90.72.0/21 runs from 70.90.72.0 to 70.90.79.255.

First 16

70.90.72.0 70.90.72.1 70.90.72.2 70.90.72.3 70.90.72.4 70.90.72.5 70.90.72.6 70.90.72.7 70.90.72.8 70.90.72.9 70.90.72.10 70.90.72.11 70.90.72.12 70.90.72.13 70.90.72.14 70.90.72.15

Last 16

70.90.79.240 70.90.79.241 70.90.79.242 70.90.79.243 70.90.79.244 70.90.79.245 70.90.79.246 70.90.79.247 70.90.79.248 70.90.79.249 70.90.79.250 70.90.79.251 70.90.79.252 70.90.79.253 70.90.79.254 70.90.79.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 70.88.0.0/14.

Announced prefix

70.88.0.0/14

Origin AS

AS7922

Announcement samples

46,739

Last seen

2026-11-10 02:37:41

Frequently Asked Questions

What is 70.90.72.0/21?

70.90.72.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 70.90.72.0 to 70.90.79.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 70.90.72.0/21 network?

The 70.90.72.0/21 range is allocated to Comcast Cable Communications, LLC and announced via AS7922 from United States.

Last updated: 2026-11-10 02:54:06 UTC