63.251.128.0/20 CIDR Lookup — 4.1K IPs

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 (27y) +6
Has a reverse-DNS (PTR) record +5
Trust score 76 / 100

Experimental · trust-vectors model v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 63.251.128.0/20

CIDR	IPs	Organization	ASN	Country
63.251.128.0/21	2.0K	Unitas Global	AS14742	US
63.251.128.0/21	2.0K	Unitas Global	AS14742	US
63.251.128.0/21	2.0K	—	—	US
63.251.136.0/22	1.0K	—	—	US
63.251.136.0/22	1.0K	FirstLight Fiber, Inc.	AS27382	US
63.251.136.0/22	1.0K	FirstLight Fiber, Inc.	AS27382	US
63.251.140.0/23	512	Unitas Global	AS14742	US
63.251.140.0/23	512	Unitas Global	AS14742	US
63.251.142.0/23	512	—	—	US
63.251.142.0/24	256	Charles River Operation	AS64249	US
63.251.143.0/24	256	Unitas Global	AS14742	US
63.251.142.0/24	256	Charles River Operation	AS64249	US
63.251.140.0/24	256	—	—	US
63.251.143.0/24	256	Unitas Global	AS14742	US
63.251.141.0/25	128	—	—	US
63.251.141.128/26	64	—	—	US
63.251.141.192/27	32	—	—	US
63.251.141.240/28	16	—	—	US
63.251.141.232/29	8	—	—	US
63.251.141.224/30	4	—	—	US
63.251.141.228/31	2	—	—	US
63.251.141.231/32	1	—	—	US
63.251.141.230/32	1	—	—	US

First 256 of 4,096 IP addresses in 63.251.128.0/20

63.251.128.0 63.251.128.1 63.251.128.2 63.251.128.3 63.251.128.4 63.251.128.5 63.251.128.6 63.251.128.7 63.251.128.8 63.251.128.9 63.251.128.10 63.251.128.11 63.251.128.12 63.251.128.13 63.251.128.14 63.251.128.15 63.251.128.16 63.251.128.17 63.251.128.18 63.251.128.19 63.251.128.20 63.251.128.21 63.251.128.22 63.251.128.23 63.251.128.24 63.251.128.25 63.251.128.26 63.251.128.27 63.251.128.28 63.251.128.29 63.251.128.30 63.251.128.31 63.251.128.32 63.251.128.33 63.251.128.34 63.251.128.35 63.251.128.36 63.251.128.37 63.251.128.38 63.251.128.39 63.251.128.40 63.251.128.41 63.251.128.42 63.251.128.43 63.251.128.44 63.251.128.45 63.251.128.46 63.251.128.47 63.251.128.48 63.251.128.49 63.251.128.50 63.251.128.51 63.251.128.52 63.251.128.53 63.251.128.54 63.251.128.55 63.251.128.56 63.251.128.57 63.251.128.58 63.251.128.59 63.251.128.60 63.251.128.61 63.251.128.62 63.251.128.63 63.251.128.64 63.251.128.65 63.251.128.66 63.251.128.67 63.251.128.68 63.251.128.69 63.251.128.70 63.251.128.71 63.251.128.72 63.251.128.73 63.251.128.74 63.251.128.75 63.251.128.76 63.251.128.77 63.251.128.78 63.251.128.79 63.251.128.80 63.251.128.81 63.251.128.82 63.251.128.83 63.251.128.84 63.251.128.85 63.251.128.86 63.251.128.87 63.251.128.88 63.251.128.89 63.251.128.90 63.251.128.91 63.251.128.92 63.251.128.93 63.251.128.94 63.251.128.95 63.251.128.96 63.251.128.97 63.251.128.98 63.251.128.99 63.251.128.100 63.251.128.101 63.251.128.102 63.251.128.103 63.251.128.104 63.251.128.105 63.251.128.106 63.251.128.107 63.251.128.108 63.251.128.109 63.251.128.110 63.251.128.111 63.251.128.112 63.251.128.113 63.251.128.114 63.251.128.115 63.251.128.116 63.251.128.117 63.251.128.118 63.251.128.119 63.251.128.120 63.251.128.121 63.251.128.122 63.251.128.123 63.251.128.124 63.251.128.125 63.251.128.126 63.251.128.127 63.251.128.128 63.251.128.129 63.251.128.130 63.251.128.131 63.251.128.132 63.251.128.133 63.251.128.134 63.251.128.135 63.251.128.136 63.251.128.137 63.251.128.138 63.251.128.139 63.251.128.140 63.251.128.141 63.251.128.142 63.251.128.143 63.251.128.144 63.251.128.145 63.251.128.146 63.251.128.147 63.251.128.148 63.251.128.149 63.251.128.150 63.251.128.151 63.251.128.152 63.251.128.153 63.251.128.154 63.251.128.155 63.251.128.156 63.251.128.157 63.251.128.158 63.251.128.159 63.251.128.160 63.251.128.161 63.251.128.162 63.251.128.163 63.251.128.164 63.251.128.165 63.251.128.166 63.251.128.167 63.251.128.168 63.251.128.169 63.251.128.170 63.251.128.171 63.251.128.172 63.251.128.173 63.251.128.174 63.251.128.175 63.251.128.176 63.251.128.177 63.251.128.178 63.251.128.179 63.251.128.180 63.251.128.181 63.251.128.182 63.251.128.183 63.251.128.184 63.251.128.185 63.251.128.186 63.251.128.187 63.251.128.188 63.251.128.189 63.251.128.190 63.251.128.191 63.251.128.192 63.251.128.193 63.251.128.194 63.251.128.195 63.251.128.196 63.251.128.197 63.251.128.198 63.251.128.199 63.251.128.200 63.251.128.201 63.251.128.202 63.251.128.203 63.251.128.204 63.251.128.205 63.251.128.206 63.251.128.207 63.251.128.208 63.251.128.209 63.251.128.210 63.251.128.211 63.251.128.212 63.251.128.213 63.251.128.214 63.251.128.215 63.251.128.216 63.251.128.217 63.251.128.218 63.251.128.219 63.251.128.220 63.251.128.221 63.251.128.222 63.251.128.223 63.251.128.224 63.251.128.225 63.251.128.226 63.251.128.227 63.251.128.228 63.251.128.229 63.251.128.230 63.251.128.231 63.251.128.232 63.251.128.233 63.251.128.234 63.251.128.235 63.251.128.236 63.251.128.237 63.251.128.238 63.251.128.239 63.251.128.240 63.251.128.241 63.251.128.242 63.251.128.243 63.251.128.244 63.251.128.245 63.251.128.246 63.251.128.247 63.251.128.248 63.251.128.249 63.251.128.250 63.251.128.251 63.251.128.252 63.251.128.253 63.251.128.254 63.251.128.255 + 3.8K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

This block is announced in BGP, observed across our RIPE RIS collectors.

Announced prefix

63.251.128.0/20

Origin AS

AS14742

Announcement samples

12,246

Last seen

2026-07-23 17:49:45

RIR Ownership History

Atom feed ⇲

Allocation changes captured weekly from regional internet registry (RIR) delegation files.

Date	Event	From	To	RIR
2026-05-10	New Allocation	—	US	arin

Frequently Asked Questions

What is 63.251.128.0/20?

63.251.128.0/20 is a CIDR network block containing 4,096 IPv4 addresses (from 63.251.128.0 to 63.251.143.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 63.251.128.0/20 network?

The 63.251.128.0/20 range is allocated to an unknown organization from United States.