177.155.176.0/20

Currently announced by AS264100 RIO CABLE TELECOM, in the routed prefix 177.155.176.0/20.

Current ASN: AS264100; RIO CABLE TELECOM
Routed prefix: 177.155.176.0/20; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: LACNIC; Brazil · 177.155.176.0/20

Routing data · Nov 8, 2026, 10:26 UTC

ASN historyEvery routed prefix covering 177.155.176.0/20

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
177.155.176.0/20	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing

More specific routes20 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
177.155.176.0/22	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.176.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.177.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.178.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.179.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.180.0/22	AS28296	Acessa Telecomunicações Ltda	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.184.0/21	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.184.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.185.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.186.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.187.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.188.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.189.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.190.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.191.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-08 10:26	Announcing
177.155.180.0/22	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-04 20:26	Stopped
177.155.180.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-04 20:26	Stopped
177.155.181.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-04 20:26	Stopped
177.155.182.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-04 20:26	Stopped
177.155.183.0/24	AS264100	RIO CABLE TELECOM	Brazil	Before monitoring	2026-11-04 20:26	Stopped

Change logAll changes

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

Look up another address

RIR allocation record

Registry: LACNIC
Allocated block: 177.155.176.0/20
Country: Brazil
Allocation date: 2012-08-30
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.