CIDR Range

1.104.0.0/13

524.3K IPs /13 Korea Telecom AS4766 South Korea APNIC

Addresses

524,288

524.3K

IP Range

1.104.0.0

→ 1.111.255.255

Sub-ranges

within this block

PTR Density

0.0%

0 of 524.3K 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

Baseline (neutral) 65
Long-established allocation (16y) +6
Isp allocation +5
Trust score 76 / 100

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

Geolocation

First and last addresses in 1.104.0.0/13

1.104.0.0/13 runs from 1.104.0.0 to 1.111.255.255.

First 16

1.104.0.0 1.104.0.1 1.104.0.2 1.104.0.3 1.104.0.4 1.104.0.5 1.104.0.6 1.104.0.7 1.104.0.8 1.104.0.9 1.104.0.10 1.104.0.11 1.104.0.12 1.104.0.13 1.104.0.14 1.104.0.15

Last 16

1.111.255.240 1.111.255.241 1.111.255.242 1.111.255.243 1.111.255.244 1.111.255.245 1.111.255.246 1.111.255.247 1.111.255.248 1.111.255.249 1.111.255.250 1.111.255.251 1.111.255.252 1.111.255.253 1.111.255.254 1.111.255.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 1.0.0.0/8.

Announced prefix

1.0.0.0/8

Origin AS

AS45820

Announcement samples

Last seen

2026-08-12 12:13:47

Frequently Asked Questions

What is 1.104.0.0/13?

1.104.0.0/13 is a CIDR network block containing 524,288 IPv4 addresses (from 1.104.0.0 to 1.111.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 1.104.0.0/13 network?

The 1.104.0.0/13 range is allocated to Korea Telecom and announced via AS4766 from South Korea.

Last updated: 2026-10-31 00:24:06 UTC