181.66.0.0/16

Currently announced by AS6147 Telefonica Del Perú, in the routed prefix 181.66.0.0/16.

Current ASN: AS6147; Telefonica Del Perú
Routed prefix: 181.66.0.0/16; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: LACNIC; Peru · 181.66.0.0/15

Routing data · Nov 8, 2026, 12:23 UTC

ASN historyEvery routed prefix covering 181.66.0.0/16

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
181.66.0.0/16	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing

More specific routes133 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
181.66.0.0/19	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.0.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.2.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.3.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.5.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.6.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.8.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.9.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.10.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.14.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.15.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.16.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.17.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.18.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.19.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.20.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.23.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.24.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.28.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.29.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.31.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.32.0/19	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.34.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.35.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.36.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.37.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.38.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.42.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.43.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.44.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.46.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.47.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.48.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.49.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.52.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.53.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.54.0/23	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.56.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.59.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.63.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.64.0/19	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.67.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.72.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.73.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.76.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.77.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.78.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.79.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.80.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.81.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.82.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.83.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.84.0/23	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.88.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.89.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.90.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.93.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.96.0/19	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.96.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.97.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.102.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.103.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.105.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.107.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.109.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.111.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.114.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.115.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.116.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.119.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.120.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.121.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.122.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.123.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.124.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.127.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.128.0/19	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.128.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.136.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.137.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.138.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.139.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.140.0/23	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.147.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.150.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.151.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.152.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.153.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.154.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.156.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.157.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.158.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.159.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.160.0/19	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.160.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.164.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.166.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.167.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.168.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.169.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.171.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.172.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.176.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.177.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.178.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.179.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.180.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.181.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.182.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.184.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.185.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.186.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.187.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.188.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.189.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.190.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.191.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.192.0/19	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.193.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.194.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.195.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.203.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.204.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.206.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.207.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.210.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.211.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.220.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.221.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.222.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.223.0/24	AS6147	Telefonica Del Perú	Peru	2026-10-29 10:22	2026-11-08 12:23	Announcing
181.66.224.0/19	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 12:23	Announcing
181.66.51.0/24	AS6147	Telefonica Del Perú	Peru	Before monitoring	2026-11-08 04:22	Stopped

Change logAll changes

The routes covering this address have had no origin changes since ASNBase started monitoring.

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RIR allocation record

Registry: LACNIC
Allocated block: 181.66.0.0/15
Country: Peru
Allocation date: 2012-08-10
Status: allocated

From the RIRs’ delegated statistics files. Shows where the addresses are registered, not where they are used.

How monitoring works

Every 2 hours ASNBase takes the bgp.tools global routing table (prefix → origin ASN) and compares it with the previous one. The detected time is the time of that comparison; the actual change can be up to about 2 hours earlier.
Only routes seen by more than 100 bgp.tools peers are listed as changes; routes with less visibility are only kept in the history.
A new announcement counts only if it is still in the next routing table, and a withdrawal only if the prefix is missing from two tables in a row, so short flaps are ignored.
ASNBase has been monitoring since 2026-10-19. “Before monitoring” under “First seen” means the route was already announced when monitoring started; the earlier date is unknown.
Prefixes first seen during the first day of monitoring do not count as new announcements: most of them were simply missing from the table at the moment monitoring started.
Countries and regions follow the ASN’s registration, not the actual location of the IP addresses.