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CIDR Range

172.5.248.0/21

2.0K IPs /21 AT&T Enterprises, LLC AS7018 United States ARIN
Addresses
2,048
2.0K
IP Range
172.5.248.0
→ 172.5.255.255
Sub-ranges
5+
within this block
PTR Density
100.0%
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.

73/100
Moderate
How this score is built

Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →

Ranges inside 172.5.248.0/21

CIDRIPsOrganizationASNCountry
172.5.248.0/22 1.0K AT&T Enterprises, LLC AS7018 US
172.5.252.0/22 1.0K AT&T Enterprises, LLC AS7018 US
172.5.254.0/23 512 AT&T Enterprises, LLC AS7018 US
172.5.252.0/24 256 AT&T Enterprises, LLC AS7018 US
172.5.253.0/24 256 AT&T Enterprises, LLC AS7018 US

Geolocation

First 256 of 2,048 IP addresses in 172.5.248.0/21

172.5.248.0 172.5.248.1 172.5.248.2 172.5.248.3 172.5.248.4 172.5.248.5 172.5.248.6 172.5.248.7 172.5.248.8 172.5.248.9 172.5.248.10 172.5.248.11 172.5.248.12 172.5.248.13 172.5.248.14 172.5.248.15 172.5.248.16 172.5.248.17 172.5.248.18 172.5.248.19 172.5.248.20 172.5.248.21 172.5.248.22 172.5.248.23 172.5.248.24 172.5.248.25 172.5.248.26 172.5.248.27 172.5.248.28 172.5.248.29 172.5.248.30 172.5.248.31 172.5.248.32 172.5.248.33 172.5.248.34 172.5.248.35 172.5.248.36 172.5.248.37 172.5.248.38 172.5.248.39 172.5.248.40 172.5.248.41 172.5.248.42 172.5.248.43 172.5.248.44 172.5.248.45 172.5.248.46 172.5.248.47 172.5.248.48 172.5.248.49 172.5.248.50 172.5.248.51 172.5.248.52 172.5.248.53 172.5.248.54 172.5.248.55 172.5.248.56 172.5.248.57 172.5.248.58 172.5.248.59 172.5.248.60 172.5.248.61 172.5.248.62 172.5.248.63 172.5.248.64 172.5.248.65 172.5.248.66 172.5.248.67 172.5.248.68 172.5.248.69 172.5.248.70 172.5.248.71 172.5.248.72 172.5.248.73 172.5.248.74 172.5.248.75 172.5.248.76 172.5.248.77 172.5.248.78 172.5.248.79 172.5.248.80 172.5.248.81 172.5.248.82 172.5.248.83 172.5.248.84 172.5.248.85 172.5.248.86 172.5.248.87 172.5.248.88 172.5.248.89 172.5.248.90 172.5.248.91 172.5.248.92 172.5.248.93 172.5.248.94 172.5.248.95 172.5.248.96 172.5.248.97 172.5.248.98 172.5.248.99 172.5.248.100 172.5.248.101 172.5.248.102 172.5.248.103 172.5.248.104 172.5.248.105 172.5.248.106 172.5.248.107 172.5.248.108 172.5.248.109 172.5.248.110 172.5.248.111 172.5.248.112 172.5.248.113 172.5.248.114 172.5.248.115 172.5.248.116 172.5.248.117 172.5.248.118 172.5.248.119 172.5.248.120 172.5.248.121 172.5.248.122 172.5.248.123 172.5.248.124 172.5.248.125 172.5.248.126 172.5.248.127 172.5.248.128 172.5.248.129 172.5.248.130 172.5.248.131 172.5.248.132 172.5.248.133 172.5.248.134 172.5.248.135 172.5.248.136 172.5.248.137 172.5.248.138 172.5.248.139 172.5.248.140 172.5.248.141 172.5.248.142 172.5.248.143 172.5.248.144 172.5.248.145 172.5.248.146 172.5.248.147 172.5.248.148 172.5.248.149 172.5.248.150 172.5.248.151 172.5.248.152 172.5.248.153 172.5.248.154 172.5.248.155 172.5.248.156 172.5.248.157 172.5.248.158 172.5.248.159 172.5.248.160 172.5.248.161 172.5.248.162 172.5.248.163 172.5.248.164 172.5.248.165 172.5.248.166 172.5.248.167 172.5.248.168 172.5.248.169 172.5.248.170 172.5.248.171 172.5.248.172 172.5.248.173 172.5.248.174 172.5.248.175 172.5.248.176 172.5.248.177 172.5.248.178 172.5.248.179 172.5.248.180 172.5.248.181 172.5.248.182 172.5.248.183 172.5.248.184 172.5.248.185 172.5.248.186 172.5.248.187 172.5.248.188 172.5.248.189 172.5.248.190 172.5.248.191 172.5.248.192 172.5.248.193 172.5.248.194 172.5.248.195 172.5.248.196 172.5.248.197 172.5.248.198 172.5.248.199 172.5.248.200 172.5.248.201 172.5.248.202 172.5.248.203 172.5.248.204 172.5.248.205 172.5.248.206 172.5.248.207 172.5.248.208 172.5.248.209 172.5.248.210 172.5.248.211 172.5.248.212 172.5.248.213 172.5.248.214 172.5.248.215 172.5.248.216 172.5.248.217 172.5.248.218 172.5.248.219 172.5.248.220 172.5.248.221 172.5.248.222 172.5.248.223 172.5.248.224 172.5.248.225 172.5.248.226 172.5.248.227 172.5.248.228 172.5.248.229 172.5.248.230 172.5.248.231 172.5.248.232 172.5.248.233 172.5.248.234 172.5.248.235 172.5.248.236 172.5.248.237 172.5.248.238 172.5.248.239 172.5.248.240 172.5.248.241 172.5.248.242 172.5.248.243 172.5.248.244 172.5.248.245 172.5.248.246 172.5.248.247 172.5.248.248 172.5.248.249 172.5.248.250 172.5.248.251 172.5.248.252 172.5.248.253 172.5.248.254 172.5.248.255 + 1.8K more (range too large to list inline)

BGP Routing

Live BGP anomalies →

Not announced as an exact prefix — covered by the announced supernet 172.0.0.0/12.

Announced prefix
172.0.0.0/12
Origin AS
AS7018
Announcement samples
3,835
Last seen
2026-07-23 21:25:41

RIR Ownership History

Atom feed ⇲

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

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

Frequently Asked Questions

What is 172.5.248.0/21?

172.5.248.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 172.5.248.0 to 172.5.255.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 172.5.248.0/21 network?

The 172.5.248.0/21 range is allocated to AT&T Enterprises, LLC and announced via AS7018 from United States.

Last updated: 2026-07-23 21:55:31 UTC
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