66.187.0.0/23

AS36321 · Castle Global Inc.

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Summary

Country	United States
Domain	castlefunders.com
ASN	AS36321
Registry	ARIN
ID	CSTL-EAST

WHOIS Details

NetHandle:      NET-66-187-0-0-1
OrgID:          CG-594
Parent:         NET-66-0-0-0-0
NetName:        CSTL-EAST
NetRange:       66.187.0.0 - 66.187.1.255
NetType:        allocation
RegDate:        2021-04-07
Updated:        2021-12-14
Source:         ARIN


OrgID:          CG-594
OrgName:        Castle Global Inc.
CanAllocate:    
Street:         100 1st Street, 11th Floor
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94105
RegDate:        2017-09-14
Updated:        2025-03-19
OrgAdminHandle: NELSO673-ARIN
OrgTechHandle:  KARPM16-ARIN
OrgTechHandle:  NELSO673-ARIN
OrgAbuseHandle: NELSO673-ARIN
OrgNOCHandle:   NELSO673-ARIN
OrgRoutingHandle:   NELSO673-ARIN
OrgDNSHandle:   NELSO673-ARIN
Source:         ARIN


POCHandle:      NELSO673-ARIN
IsRole:         N
LastName:       Nelson
FirstName:      Eric
Street:         100 1st Street, 11th Floor
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94105
RegDate:        2017-09-13
Updated:        2025-03-17
OfficePhone:    +1-916-803-7841
Mailbox:        eric@thehive.ai
Source:         ARIN


POCHandle:      KARPM16-ARIN
IsRole:         N
LastName:       Karpman
FirstName:      Dmitriy
Street:         100 1st Street, 11th Floor
City:           San Francisco
State/Prov:     CA
Country:        US
PostalCode:     94105
RegDate:        2025-03-19
Updated:        2025-03-19
OfficePhone:    +1-857-206-3524
Mailbox:        dmitriy@thehive.ai
Source:         ARIN

Nearby Ranges

BGP prefixes that overlap with 66.187.0.0/16

Range	ASN	Company	Num of IPs
66.187.128.0/19	AS33327	Telecom Colocation, LLC	8,192
66.187.32.0/20	AS14703	MARQUETTE-ADAMS TELEPHONE COOPERATIVE, INC.	4,096
66.187.208.0/20	AS109	CISCO SYSTEMS, INC.	4,096
66.187.64.0/20	AS40156	The Optimal Link Corporation	4,096
66.187.48.0/20	AS397360	Texas State Technical College Harlingen	4,096
66.187.96.0/20	AS396905	HomeWorks Connect	4,096
66.187.176.0/20	AS35985	One Ring Networks, Inc.	4,096
66.187.224.0/20	AS17314	Red Hat, Inc.	4,096
66.187.224.0/20	AS17314	Red Hat, Inc.	4,096
66.187.224.0/20	AS22360	Red Hat, Inc.	4,096
66.187.224.0/20	AS22360	Red Hat, Inc.	4,096
66.187.224.0/20	AS22753	Red Hat, Inc.	4,096
66.187.160.0/20	AS11402	Dasia.Net, LLC	4,096
66.187.224.0/20	AS22753	Red Hat, Inc.	4,096
66.187.244.0/22	AS63452	Velocihost Inc.	1,024
66.187.200.0/22	AS22952	Chaparral CableVision	1,024
66.187.192.0/22	AS33185	Hive Data Center Inc.	1,024
66.187.240.0/22	AS401944	Vortex Wireless Internet	1,024
66.187.28.0/22	AS55039	Fatbeam, LLC	1,024
66.187.248.0/22	AS5650	HostingYard LLC	1,024
66.187.24.0/22	AS63133	LENNO	1,024
66.187.12.0/23	AS16436	Az Airnet	512
66.187.254.0/24	AS17176	Hosting Tornado LLC	256
66.187.253.0/24	AS17176	Hosting Tornado LLC	256
66.187.15.0/24	AS399064	Content Guru Inc	256
66.187.252.0/24	AS17176	Hosting Tornado LLC	256
66.187.198.0/24	AS33296	Piedmont Broadband Corporation	256
66.187.197.0/24	AS33296	Piedmont Broadband Corporation	256
66.187.152.0/24	AS33327	Outer Edge Technology, LLC	256
66.187.255.0/24	AS17176	Hosting Tornado LLC	256
66.187.2.0/24	AS395141	Primisys Computer Systems & Support, LLC	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Read more

Pingable IPs

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

IP Address	ASN	Details
66.187.0.130	AS36321 Castle Global Inc.	`0.30ms` from Ashburn, US
66.187.1.130	AS36321 Castle Global Inc.	`0.31ms` from Ashburn, US

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
209.131.149.7	AS7342 VeriSign Infrastructure & Operations	`0.15ms` from Chicago, US
34.72.146.199	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
151.228.155.7	AS5607 Sky UK Limited	`4.10ms` from Erith, GB
113.101.222.135	AS4134 CHINANET-BACKBONE	`7.26ms` from Guangzhou, CN
115.72.51.23	AS7552 Viettel Group	`1.26ms` from Ho Chi Minh City, VN
183.87.75.151	AS136907 HUAWEI CLOUDS	`0.88ms` from Hong Kong, HK
218.255.65.103	AS9381 HKBN Enterprise Solutions HK Limited	`1.24ms` from Hong Kong, HK
137.101.53.215	AS12430 VODAFONE ESPANA S.A.U.	`13.79ms` from Logrono, ES
50.91.222.103	AS33363 Charter Communications, Inc	`12.07ms` from Los Angeles, US
37.119.61.119	AS30722 Vodafone Italia S.p.A.	`10.24ms` from Milan, IT
124.83.184.135	AS24572 Yahoo Japan	`0.25ms` from Osaka, JP
222.133.129.247	AS4837 CHINA UNICOM China169 Backbone	`9.23ms` from Qingdao, CN
37.35.42.7	AS199967 Think Huge Ltd	`0.57ms` from Secaucus, US
46.59.50.151	AS8473 Bahnhof AB	`0.45ms` from Stockholm, SE
18.210.113.135	AS14618 Amazon.com, Inc.	`0.54ms` from Ashburn, US
72.104.219.151	AS6167 Verizon Business	`19.76ms` from Ashburn, US
180.180.141.55	AS23969 TOT Public Company Limited	`1.55ms` from Bangkok, TH
187.147.71.151	AS8151 UNINET	`12.67ms` from Cancún, MX
74.125.216.231	AS15169 Google LLC	`0.42ms` from Council Bluffs, US
54.171.20.71	AS16509 Amazon.com, Inc.	`0.29ms` from Dublin, IE
81.174.249.7	AS6871 Plusnet	`2.92ms` from Erith, GB
80.136.161.119	AS3320 Deutsche Telekom AG	`8.65ms` from Frankfurt am Main, DE
46.132.190.183	AS1759 Telia Finland Oyj	`9.05ms` from Helsinki, FI
94.177.130.55	AS15692 Razorblue Ltd	`5.40ms` from London, GB
46.208.109.183	AS6871 Plusnet	`7.18ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -f2 66.187.0.1

traceroute to 66.187.0.1 (66.187.0.1): 64 hops max, 52 byte packets

2 [AS917] 199.119.65.3 4.865 ms

3 *

4 *

5 *

6 [AS174] 154.54.87.34 1.172 ms

7 [AS36321] 66.187.0.1 0.417 ms

Measurement taken from

IPinfo ProbeNet in Ashburn, US

On December 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.

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