187.121.226.0/24

AS266356 · PRONTO FIBRA LTDA

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Summary

Country	Brazil
Domain	prontofibra.com.br
ASN	AS266356
Parent Range	187.121.224.0/21
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:      20251215 AA
nslastaa:    20251215
nserver:     ns2.prontofibra.com.br
nsstat:      20251215 AA
nslastaa:    20251215
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

Overlapping Ranges

BGP prefixes that contain 187.121.226.0/24

Range	ASN	Company	Num of IPs
187.121.224.0/21	AS266356	PRONTO FIBRA LTDA	2,048

Nearby Ranges

BGP prefixes that overlap with 187.121.0.0/16

Range	ASN	Company	Num of IPs
187.121.0.0/17	AS19182	TELEFÔNICA BRASIL S.A	32,768
187.121.192.0/19	AS28667	VERO S.A	8,192
187.121.176.0/20	AS28343	UNIFIQUE TELECOMUNICACOES S/A	4,096
187.121.160.0/20	AS270814	ZAAZ PROVEDOR DE INTERNET E TELECOMUNICACOES LTDA	4,096
187.121.224.0/21	AS266356	PRONTO FIBRA LTDA	2,048
187.121.144.0/21	AS273683	ALLREDE TELECOM LTDA	2,048
187.121.232.0/22	AS264119	UBA CONECT TELECOM LTDA - ME	1,024
187.121.236.0/22	AS28296	C-ComTelecom Servios Ltda-ME	1,024
187.121.156.0/22	AS270918	INSIDE TECNOLOGIA E SERVIÇOS LTDA	1,024
187.121.152.0/22	AS270921	CROSS CONNECT PROVEDOR	1,024

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.

Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
187.121.226.4	AS266356 PRONTO FIBRA LTDA	`23.29ms` 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
54.71.134.104	AS16509 Amazon.com, Inc.	`0.16ms` from Boardman, US
41.239.70.248	AS8452 TE-AS	`4.35ms` from Cairo, EG
3.141.175.104	AS16509 Amazon.com, Inc.	`0.19ms` from Columbus, US
77.233.240.168	AS31027 GlobalConnect A/S	`0.35ms` from Copenhagen, DK
72.191.235.40	AS11427 Charter Communications Inc	`5.23ms` from Dallas, US
193.150.54.216	AS61325 LLC Cifra-Telecom	`0.37ms` from Moscow, RU
126.142.202.88	AS17676 SoftBank Corp.	`4.28ms` from Osaka, JP
72.209.2.40	AS22773 Cox Communications Inc.	`7.56ms` from Providence, US
40.64.94.120	AS8075 Microsoft Corporation	`0.32ms` from Quincy, US
175.236.30.152	AS4766 Korea Telecom	`2.25ms` from Seoul, KR
54.254.122.88	AS16509 Amazon.com, Inc.	`0.11ms` from Singapore, SG
126.42.138.72	AS17676 SoftBank Corp.	`17.15ms` from Tokyo, JP
101.108.40.184	AS23969 TOT Public Company Limited	`2.10ms` from Bangkok, TH
15.205.210.248	AS8987 Amazon Data Services Ireland Ltd	`0.70ms` from Boardman, US
154.203.242.104	AS9304 HGC Global Communications Limited	`2.85ms` from Hong Kong, HK
5.58.38.232	AS16223 MAXNET TELECOM, LTD	`5.61ms` from Kyiv, UA
175.172.203.168	AS4837 CHINA UNICOM China169 Backbone	`14.02ms` from Liaoyang, CN
92.40.46.40	AS206067 Hutchison 3G UK Limited	`16.73ms` from London, GB
98.147.219.104	AS20001 Charter Communications Inc	`4.43ms` from Los Angeles, US
16.24.73.120	AS16509 Amazon.com, Inc.	`0.10ms` from Manama, BH
15.184.1.8	AS16509 Amazon.com, Inc.	`0.12ms` from Manama, BH
95.131.24.248	AS49063 Data Storage Center JSC	`0.70ms` from Moscow, RU
153.170.163.232	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.92ms` from Osaka, JP
88.187.105.8	AS12322 Free SAS	`7.57ms` from Paris, FR
76.140.53.104	AS7922 Comcast Cable Communications, LLC	`5.45ms` from Salt Lake City, US

Traceroute

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

traceroute -a -n -q1 187.121.226.4

traceroute to 187.121.226.4 (187.121.226.4): 64 hops max, 52 byte packets

1 [AS202422] 5.188.4.3 0.288 ms

2 *

3 *

4 [AS199524] 92.223.12.129 0.734 ms

5 *

6 *

7 *

8 *

9 [AS266356] 187.121.226.4 23.501 ms

Measurement taken from

IPinfo ProbeNet in Sao Paulo, BR

On December 14th 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.

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