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CIDR Range

109.181.8.0/21

2.0K IPs /21 British Telecommunications PLC AS2856 United Kingdom RIPE
Addresses
2,048
2.0K
IP Range
109.181.8.0
→ 109.181.15.255
Sub-ranges
19+
within this block
PTR Density
0.0%
0 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.

71/100
Moderate
How this score is built

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

Ranges inside 109.181.8.0/21

CIDRIPsOrganizationASNCountry
109.181.8.0/22 1.0K British Telecommunications PLC AS2856 GB
109.181.8.0/23 512 British Telecommunications PLC AS2856 GB
109.181.14.0/23 512 British Telecommunications PLC AS2856 GB
109.181.12.0/23 512 British Telecommunications PLC AS2856 GB
109.181.10.0/23 512 British Telecommunications PLC AS2856 GB
109.181.15.0/24 256 British Telecommunications PLC AS2856 GB
109.181.14.0/24 256 British Telecommunications PLC AS2856 GB
109.181.12.0/24 256 British Telecommunications PLC AS2856 GB
109.181.9.0/24 256 British Telecommunications PLC AS2856 GB
109.181.12.0/25 128 British Telecommunications PLC AS2856 GB
109.181.14.128/25 128 British Telecommunications PLC AS2856 GB
109.181.8.128/25 128 British Telecommunications PLC AS2856 GB
109.181.9.0/25 128 British Telecommunications PLC AS2856 GB
109.181.14.0/25 128 British Telecommunications PLC AS2856 GB
109.181.13.128/25 128 British Telecommunications PLC AS2856 GB
109.181.13.0/25 128 British Telecommunications PLC AS2856 GB
109.181.12.128/25 128 British Telecommunications PLC AS2856 GB
109.181.9.128/25 128 British Telecommunications PLC AS2856 GB
109.181.8.0/25 128 British Telecommunications PLC AS2856 GB

Geolocation

First 256 of 2,048 IP addresses in 109.181.8.0/21

109.181.8.0 109.181.8.1 109.181.8.2 109.181.8.3 109.181.8.4 109.181.8.5 109.181.8.6 109.181.8.7 109.181.8.8 109.181.8.9 109.181.8.10 109.181.8.11 109.181.8.12 109.181.8.13 109.181.8.14 109.181.8.15 109.181.8.16 109.181.8.17 109.181.8.18 109.181.8.19 109.181.8.20 109.181.8.21 109.181.8.22 109.181.8.23 109.181.8.24 109.181.8.25 109.181.8.26 109.181.8.27 109.181.8.28 109.181.8.29 109.181.8.30 109.181.8.31 109.181.8.32 109.181.8.33 109.181.8.34 109.181.8.35 109.181.8.36 109.181.8.37 109.181.8.38 109.181.8.39 109.181.8.40 109.181.8.41 109.181.8.42 109.181.8.43 109.181.8.44 109.181.8.45 109.181.8.46 109.181.8.47 109.181.8.48 109.181.8.49 109.181.8.50 109.181.8.51 109.181.8.52 109.181.8.53 109.181.8.54 109.181.8.55 109.181.8.56 109.181.8.57 109.181.8.58 109.181.8.59 109.181.8.60 109.181.8.61 109.181.8.62 109.181.8.63 109.181.8.64 109.181.8.65 109.181.8.66 109.181.8.67 109.181.8.68 109.181.8.69 109.181.8.70 109.181.8.71 109.181.8.72 109.181.8.73 109.181.8.74 109.181.8.75 109.181.8.76 109.181.8.77 109.181.8.78 109.181.8.79 109.181.8.80 109.181.8.81 109.181.8.82 109.181.8.83 109.181.8.84 109.181.8.85 109.181.8.86 109.181.8.87 109.181.8.88 109.181.8.89 109.181.8.90 109.181.8.91 109.181.8.92 109.181.8.93 109.181.8.94 109.181.8.95 109.181.8.96 109.181.8.97 109.181.8.98 109.181.8.99 109.181.8.100 109.181.8.101 109.181.8.102 109.181.8.103 109.181.8.104 109.181.8.105 109.181.8.106 109.181.8.107 109.181.8.108 109.181.8.109 109.181.8.110 109.181.8.111 109.181.8.112 109.181.8.113 109.181.8.114 109.181.8.115 109.181.8.116 109.181.8.117 109.181.8.118 109.181.8.119 109.181.8.120 109.181.8.121 109.181.8.122 109.181.8.123 109.181.8.124 109.181.8.125 109.181.8.126 109.181.8.127 109.181.8.128 109.181.8.129 109.181.8.130 109.181.8.131 109.181.8.132 109.181.8.133 109.181.8.134 109.181.8.135 109.181.8.136 109.181.8.137 109.181.8.138 109.181.8.139 109.181.8.140 109.181.8.141 109.181.8.142 109.181.8.143 109.181.8.144 109.181.8.145 109.181.8.146 109.181.8.147 109.181.8.148 109.181.8.149 109.181.8.150 109.181.8.151 109.181.8.152 109.181.8.153 109.181.8.154 109.181.8.155 109.181.8.156 109.181.8.157 109.181.8.158 109.181.8.159 109.181.8.160 109.181.8.161 109.181.8.162 109.181.8.163 109.181.8.164 109.181.8.165 109.181.8.166 109.181.8.167 109.181.8.168 109.181.8.169 109.181.8.170 109.181.8.171 109.181.8.172 109.181.8.173 109.181.8.174 109.181.8.175 109.181.8.176 109.181.8.177 109.181.8.178 109.181.8.179 109.181.8.180 109.181.8.181 109.181.8.182 109.181.8.183 109.181.8.184 109.181.8.185 109.181.8.186 109.181.8.187 109.181.8.188 109.181.8.189 109.181.8.190 109.181.8.191 109.181.8.192 109.181.8.193 109.181.8.194 109.181.8.195 109.181.8.196 109.181.8.197 109.181.8.198 109.181.8.199 109.181.8.200 109.181.8.201 109.181.8.202 109.181.8.203 109.181.8.204 109.181.8.205 109.181.8.206 109.181.8.207 109.181.8.208 109.181.8.209 109.181.8.210 109.181.8.211 109.181.8.212 109.181.8.213 109.181.8.214 109.181.8.215 109.181.8.216 109.181.8.217 109.181.8.218 109.181.8.219 109.181.8.220 109.181.8.221 109.181.8.222 109.181.8.223 109.181.8.224 109.181.8.225 109.181.8.226 109.181.8.227 109.181.8.228 109.181.8.229 109.181.8.230 109.181.8.231 109.181.8.232 109.181.8.233 109.181.8.234 109.181.8.235 109.181.8.236 109.181.8.237 109.181.8.238 109.181.8.239 109.181.8.240 109.181.8.241 109.181.8.242 109.181.8.243 109.181.8.244 109.181.8.245 109.181.8.246 109.181.8.247 109.181.8.248 109.181.8.249 109.181.8.250 109.181.8.251 109.181.8.252 109.181.8.253 109.181.8.254 109.181.8.255 + 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 109.180.0.0/15.

Announced prefix
109.180.0.0/15
Origin AS
AS2856
Announcement samples
4,988
Last seen
2026-07-23 15:00:41

Frequently Asked Questions

What is 109.181.8.0/21?

109.181.8.0/21 is a CIDR network block containing 2,048 IPv4 addresses (from 109.181.8.0 to 109.181.15.255). CIDR notation combines an IP address with a prefix length to define a range of addresses.

Who owns the 109.181.8.0/21 network?

The 109.181.8.0/21 range is allocated to British Telecommunications PLC and announced via AS2856 from United Kingdom.

Last updated: 2026-07-23 15:25:31 UTC
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