Skip to main content
WorldIP.io
CIDR Range

163.129.48.0/21

Addresses
2,048
2.0K
Sub-ranges
23+
within this block
PTR Density
4.3%
88 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.

74/100
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 163.129.48.0/21

First and last addresses in 163.129.48.0/21

163.129.48.0/21 runs from 163.129.48.0 to 163.129.55.255.

First 16
Last 16

Not announced as an exact prefix — covered by the announced supernet 163.129.48.0/20.

Announced prefix
Origin AS
Announcement samples
201,271
Last seen
2026-11-14 20:43:20

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 163.129.48.0/21?

163.129.48.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 163.129.48.0 to 163.129.55.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 163.129.48.0/21 network?

The 163.129.48.0/21 range is allocated to Cisco Webex LLC and announced via AS13445 from Saudi Arabia.

Last updated: 2026-11-14 20:54:04 UTC
Share