CIDR Range

42.113.0.0/17

32.8K IPs /17 FPT Telecom Company AS18403 Vietnam APNIC

Addresses

32,768

32.8K

IP Range

42.113.0.0

→ 42.113.127.255

Sub-ranges

12+

within this block

PTR Density

0.0%

3 of 32.8K 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 (15y) +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 →

Ranges inside 42.113.0.0/17

CIDR	IPs	Organization	ASN	Country
42.113.32.0/19	8.2K	FPT Telecom Company	AS18403	VN
42.113.64.0/19	8.2K	FPT Telecom Company	AS18403	VN
42.113.112.0/20	4.1K	FPT Telecom Company	AS18403	VN
42.113.16.0/20	4.1K	FPT Telecom Company	AS18403	VN
42.113.104.0/21	2.0K	FPT Telecom Company	AS18403	VN
42.113.0.0/21	2.0K	FPT Telecom Company	AS18403	VN
42.113.12.0/22	1.0K	FPT Telecom Company	AS18403	VN
42.113.96.0/22	1.0K	FPT Telecom Company	AS18403	VN
42.113.100.0/22	1.0K	FPT Telecom Company	AS18403	VN
42.113.8.0/23	512	FPT Telecom Company	AS18403	VN
42.113.11.0/24	256	FPT Telecom Company	AS18403	VN
42.113.10.0/24	256	FPT Telecom Company	AS18403	VN

First and last addresses in 42.113.0.0/17

42.113.0.0/17 runs from 42.113.0.0 to 42.113.127.255.

First 16

42.113.0.0 42.113.0.1 42.113.0.2 42.113.0.3 42.113.0.4 42.113.0.5 42.113.0.6 42.113.0.7 42.113.0.8 42.113.0.9 42.113.0.10 42.113.0.11 42.113.0.12 42.113.0.13 42.113.0.14 42.113.0.15

Last 16

42.113.127.240 42.113.127.241 42.113.127.242 42.113.127.243 42.113.127.244 42.113.127.245 42.113.127.246 42.113.127.247 42.113.127.248 42.113.127.249 42.113.127.250 42.113.127.251 42.113.127.252 42.113.127.253 42.113.127.254 42.113.127.255

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 42.112.0.0/13.

Announced prefix

42.112.0.0/13

Origin AS

AS18403

Announcement samples

39,941

Last seen

2026-10-28 09:02:08

Frequently Asked Questions

What is 42.113.0.0/17?

42.113.0.0/17 is a CIDR network block containing 32,768 IPv4 addresses (from 42.113.0.0 to 42.113.127.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 42.113.0.0/17 network?

The 42.113.0.0/17 range is allocated to FPT Telecom Company and announced via AS18403 from Vietnam.

Last updated: 2026-10-28 09:09:05 UTC