AS21574

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Summary

IP address summary information
Name	Century Telecom Ltda
Country	Brazil
Website	host.io/century.net.br·century.net.br
Hosted domains	68
IPv4 addresses	13,312
IPv6 addresses	7.92 × 10²⁸
ASN type	ISP
Registry	LACNIC
Allocated	25 years ago on Jun 7, 2001
Updated	6 years ago on Jun 10, 2020

Ranking

#690

Overall rank

among 74,771 networks

Traffic

#863

Infrastructure

#394

#45inBrazil

Learn how ASN rankings work

Geolocation

Share of IPv4 footprint per hexagonLessMore

Countries by IPv4 share

Brazil
100%

Held location over 90 days: 79%
Held location over 1 year: 75%
Median days between moves: 275 days
Geolocation scope: National

How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.

Activity

A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.

Mon

IP Ranges

Netblock	Company	Num of IPs
186.249.224.0/20	Century Telecom Ltda	4,096
187.1.176.0/20	Century Telecom Ltda	4,096
200.169.0.0/20	Century Telecom Ltda	4,096
168.227.200.0/22	Century Telecom Ltda	1,024
187.1.176.0/24	Century Telecom Ltda	256
187.1.178.0/24	Century Telecom Ltda	256

IP Ranges

WHOIS


  ASHandle:       █████
  OrgID:          █████
  ASName:         ██████
  ASNumber:       AS█████
  RegDate:        ████-██-██
  Updated:        ████-██-██
  TechHandle:     ████-████
  Source:         ████

Hosted Domains

There are 68 domain names hosted across 38 IP addresses on this ASN.

IP Address	Domain	Count
187.1.186.200		12
187.1.188.220		8
200.169.9.46		3
187.1.184.41		3
200.169.0.228		3

Places

IPs in this network linked to physical places, based on their Wi-Fi networks.

Places IPs161
Business Services27
Retail21
Car Dealer13

Category	In AS21574	Example IP

Places

Peers

There are 50 peers for this ASN.

ASN	Name	Rank

Upstreams

There are 6 upstreams for this ASN.

ASN	Name	Rank
AS1031	PEER 1031 LLC
AS3356	Level 3 Parent, LLC
AS7195	EDGEUNO S.A.S
AS16735	ALGAR TELECOM S/A
AS263444	Open X Tecnologia Ltda
AS267613	ELETRONET S.A.

Downstreams

There are 50 downstreams for this ASN.

ASN	Name	Rank

Pingable IPs

62 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more

IP Address	ASN	Details
200.169.7.60 Ping	AS21574Century Telecom Ltda	7.48ms from Osasco, BR
186.249.228.122 Ping	AS21574Century Telecom Ltda	6.42ms from Osasco, BR
187.1.178.177 Ping	AS21574Century Telecom Ltda	7.57ms from Sao Paulo, BR
186.249.236.249 Ping	AS21574Century Telecom Ltda	7.55ms from Osasco, BR
187.1.191.93 Ping	AS21574Century Telecom Ltda	7.51ms from Osasco, BR
2804:23ec:1000::3c1 Ping	AS21574Century Telecom Ltda	0.37ms from Osasco, BR
168.227.202.101 Ping	AS21574Century Telecom Ltda	7.55ms from Osasco, BR
187.1.186.241 Ping	AS21574Century Telecom Ltda	7.62ms from Sao Paulo, BR
186.249.231.6 Ping	AS21574Century Telecom Ltda	7.66ms from Osasco, BR
200.169.9.217 Ping	AS21574Century Telecom Ltda	7.46ms from Osasco, BR

Other Pingable IPs

IP Address	ASN	Details

Pingable IPs

Important routers in AS21574


2804:23ec:1000::3c2	São Paulo, Brazil
2804:23ec:1000::596	São Paulo, Brazil
2804:23ec:1000::1de	São Paulo, Brazil
2804:23ec::65	São Paulo, Brazil
2804:23ec::68	São Paulo, Brazil
2804:23ec:1000::416	São Paulo, Brazil
186.249.224.83	Belo Horizonte, Brazil
2804:23ec:1000::266	São Paulo, Brazil
2804:23ec:1000::3e	São Paulo, Brazil
2804:23ec:1000::242	São Paulo, Brazil

Important routers in AS21574

Traceroute

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

$ traceroute -a -n -q1 -f4 187.1.183.57

traceroute to 187.1.183.57 (187.1.183.57): 64 hops max, 52 byte packets

4 [AS3356] 8.242.26.190 47.326 ms

5 [AS21574] 187.1.183.57 48.476 ms

Measurement taken from

IPinfo ProbeNet in Rio de Janeiro, BR

On October 9, 2026

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS21574 at robtex.

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AS21574

Summary

Ranking

Geolocation

Countries by IPv4 share

Activity

IP Ranges

IP Ranges

WHOIS

Hosted Domains

Places

Places

Peers

Upstreams

Downstreams

Pingable IPs

Other Pingable IPs

Pingable IPs

Important routers in AS21574

Important routers in AS21574

Traceroute

Related Networks

AS262458

AS262962

AS265076

AS267305

AS268966

What is an ASN?

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Traceroute

Ranking

IP Ranges

Important routers in AS21574

Geolocation

Countries by IPv4 share

Pingable IPs

Other Pingable IPs

Activity

Places

AS262458

AS262962

AS265076

AS267305

AS268966

AS269602