81.143.66.0/24

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Summary

IP address summary information
ASN	AS2856 — British Telecommunications Limited
BGP Prefix	81.128.0.0/12
Pingable IPs	22
Routers	0


81.143.66.0	host81-143-66-0.in-addr.btopenworld.com	0
81.143.66.1	host81-143-66-1.in-addr.btopenworld.com	0
81.143.66.2	host81-143-66-2.in-addr.btopenworld.com	0
81.143.66.3	host81-143-66-3.in-addr.btopenworld.com	0
81.143.66.4	host81-143-66-4.in-addr.btopenworld.com	0
81.143.66.5	host81-143-66-5.in-addr.btopenworld.com	0
81.143.66.6	host81-143-66-6.in-addr.btopenworld.com	0
81.143.66.7	host81-143-66-7.in-addr.btopenworld.com	0
81.143.66.8	host81-143-66-8.in-addr.btopenworld.com	0
81.143.66.9	host81-143-66-9.in-addr.btopenworld.com	0
81.143.66.10	host81-143-66-10.in-addr.btopenworld.com	0
81.143.66.11	host81-143-66-11.in-addr.btopenworld.com	0
81.143.66.12	host81-143-66-12.in-addr.btopenworld.com	0
81.143.66.13	host81-143-66-13.in-addr.btopenworld.com	0
81.143.66.14	host81-143-66-14.in-addr.btopenworld.com	0

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$ traceroute -a -n -q1 -f3 81.143.66.181

traceroute to 81.143.66.181 (81.143.66.181): 64 hops max, 52 byte packets

3 [AS16509] 99.82.181.77 0.577 ms

4 [AS2856] 194.74.16.172 1.408 ms

5 [AS2856] 109.159.255.35 1.761 ms

6 [AS2856] 217.32.240.19 1.498 ms

7 [AS2856] 213.120.163.241 1.121 ms

8 [AS2856] 81.143.66.181 9.748 ms

Measurement taken from

IPinfo ProbeNet in London, GB

On August 7, 2026

Traceroute

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81.143.66.0/24

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81.143.66.0/24

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