187.121.224.0/21

AS266356 · PRONTO FIBRA LTDA

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Summary

Country	Brazil
Domain	prontofibra.com.br
ASN	AS266356
Registry	LACNIC
ID	HFS7

WHOIS Details

% Copyright (c) Nic.br - Use of this data is governed by the Use and

inetnum:     187.121.224.0/21
aut-num:     AS266356
abuse-c:     PRFIB
owner:       PRONTO FIBRA LTDA
ownerid:     24.404.615/0001-41
responsible: Helio Ferraz da Silva
owner-c:     HEFSL2
tech-c:      HEFSL2
inetrev:     187.121.224.0/21
nserver:     ns1.prontofibra.com.br
nsstat:      20250827 AA
nslastaa:    20250827
nserver:     ns2.prontofibra.com.br
nsstat:      20250827 AA
nslastaa:    20250827
created:     20100308
changed:     20241216

nic-hdl-br:  HEFSL2
person:      HELIO FERRAZ DA SLVA
created:     20160507
changed:     20240712

nic-hdl-br:  PRFIB
person:      Pronto Fibra
created:     20170807
changed:     20190703

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
187.121.224.177	AS266356 PRONTO FIBRA LTDA	`16.29ms` from Brasilia, BR
187.121.226.4	AS266356 PRONTO FIBRA LTDA	`23.14ms` from Sao Paulo, BR

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address	ASN	Details
67.208.162.181	AS46887 Crown Castle Fiber LLC	`0.28ms` from Ashburn, US
97.140.240.181	AS6167 Verizon Business	`15.14ms` from Atlanta, US
8.213.233.69	AS45102 Alibaba (US) Technology Co., Ltd.	`0.14ms` from Bangkok, TH
203.2.198.5	AS16509 Amazon.com, Inc.	`1.47ms` from Boardman, US
66.31.190.101	AS7922 Comcast Cable Communications, LLC	`8.89ms` from Boston, US
98.229.162.229	AS7922 Comcast Cable Communications, LLC	`9.05ms` from Boston, US
20.10.222.101	AS8075 Microsoft Corporation	`0.33ms` from Boydton, US
97.223.47.101	AS6167 Verizon Business	`12.50ms` from Chicago, US
201.168.24.5	AS19332 COORDINADORA DE CARRIER'S, S.A. DE C.V.	`12.09ms` from Dallas, US
196.202.250.5	AS21739 MAJUBA TECHNOLOGIES(PTY) Limited t/a T-SOL	`0.13ms` from Johannesburg, ZA
161.23.29.85	AS198864 Queen Mary and Westfield College, University of London	`1.53ms` from London, GB
66.128.163.21	AS15204 INTERSTATE TELECOMMUNICATIONS COOPERATIVE, INC.	`9.60ms` from Minneapolis, US
23.34.9.117	AS55836 Reliance Jio Infocomm Limited	`8.50ms` from Mumbai, IN
153.188.7.5	AS4713 NTT Communications Corporation	`17.35ms` from Osaka, JP
131.0.5.37	AS61855 NOVA NET TECNOLOGIA LTDA - ME	`3.97ms` from Osasco, BR
144.123.103.213	AS4134 CHINANET-BACKBONE	`6.39ms` from Qingdao, CN
34.231.243.245	AS14618 Amazon.com, Inc.	`0.37ms` from Reston, US
52.217.39.85	AS16509 Amazon.com, Inc.	`0.09ms` from Reston, US
168.90.219.21	AS265296 Ellitenet Telecom	`17.09ms` from Rio de Janeiro, BR
18.143.19.213	AS16509 Amazon.com, Inc.	`0.17ms` from Singapore, SG
60.79.219.245	AS17676 SoftBank Corp.	`2.76ms` from Tokyo, JP
204.101.99.69	AS577 Bell Canada	`0.93ms` from Toronto, CA
178.229.17.69	AS31615 Odido Netherlands B.V.	`17.11ms` from Amsterdam, NL
66.56.235.181	AS11426 Charter Communications Inc	`16.30ms` from Atlanta, US
96.38.248.21	AS20115 Charter Communications LLC	`6.70ms` from Atlanta, US

Traceroute

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

traceroute -a -n -q1 -f5 -m8 187.121.230.12

traceroute to 187.121.230.12 (187.121.230.12): 8 hops max, 52 byte packets

5 [] 187.16.220.80 2.611 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Sao Paulo, BR

On August 28th 2025

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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